voron-2-4-class-350-motion-frame

Voron 2.4-class 350 motion system (voron-2-4-class-350-motion-frame)

Assembly A of the Digital Twins programme (ASM-1 §7, §9): a producer (a fabrication machine model) that is posable. It is the full motion system of a Voron 2.4-class 350 CoreXY printer (owner decision D1), checked by the keystone's y4d-spec assembly check at home, at every joint limit and over the pose sweep, with --collision. Document licence: CERN-OHL-W-2.0.

235 components, 292 mates, 10 belt paths, 23 poses (home, the six limits of the three driven joints, 16 Halton samples).

Original design, cited facts. Facts come from the Voron 2.4r2 build guide (Manual/Assembly_Manual_2.4r2.pdf, version 2023-07-04, GPL-3.0), cited by page only, and from Voron's public Klipper reference configuration for the 2.4 (firmware/klipper_configurations/Octopus/Voron2_Octopus_Config.cfg at VoronDesign/Voron-2 a192410, cited path:line). No Voron text, figure, STL or CAD is in this repository; every printed part is an original commons cartridge.

What it is

Group	Components	Parts
Frame cube	12	extrusion-2020 ×12
Z drives	52	z-drive-housing ×4, bearing-625 ×12, bhcs-m5x10 ×8, gt2-pulley-16t-5mm ×4, gt2-pulley-20t-9mm ×4, gt2-pulley-80t-5mm ×4, nema-17-48mm ×4, shaft-5mm ×4, tnut-2020-m5 ×8
Bed	35	bed-extrusion-mount ×4, bed-plate-350 ×1, bhcs-m5x10 ×12, extrusion-2020 ×2, tnut-2020-m3 ×4, tnut-2020-m5 ×12
Top corners (Z idlers)	28	corner-idler-bracket ×4, bhcs-m5x30 ×12, gt2-idler-20t-9mm ×4, tnut-2020-m5 ×8
Z rails and blocks	8	mgn9-rail ×4, mgn9h-carriage ×4
Z joints and Z belt clamps	20	z-belt-clamp ×4, z-joint ×4, bhcs-m5x10 ×8, tnut-2020-m5 ×4
Gantry (C, D, E, Y rails, XY joints, front idlers, A/B drives)	76	ab-drive ×2, ab-front-idler ×2, xy-joint ×2, bearing-f695 ×12, bhcs-m5x10 ×8, bhcs-m5x16 ×12, extrusion-2020 ×4, gt2-idler-20t-6mm ×6, gt2-pulley-20t-5mm ×2, mgn9-rail ×2, mgn9h-carriage ×2, nema-17-48mm ×2, shim-5x10 ×12, tnut-2020-m5 ×8
X axis and toolhead	4	toolhead-proxy ×1, x-carriage ×1, mgn12-rail ×1, mgn12h-carriage ×1

• Frame cube (guide p. 13 counts, kit listings for the 350 cut lengths): four 530 uprights and eight 470 horizontals, all blind-jointed. Upright axes at x, y ∈ {0, 490}; the outer frame is 510 × 510 × 530. The front and back bottom horizontals carry slot_station_mm 170 for the bed mounts (255 − 65 − 20, guide p. 20); every other station is a mate offset (ASM-1 §9 v1.4).
• Top corners ×4: corner-idler-bracket (mirrored on the front-right and back-left), a GT2 20T 9 mm idler on an M5x30 BHCS, two T-nuts and two M5x30 (guide pp. 48–50).
• Z rails ×4: MGN9, 400 (sourcing sheet: MGN9H ×6 at 400 for the 350), centred on each upright's inner x face, the rails facing each other across the frame (guide pp. 25, 27), their lower ends 3 above the bottom horizontals ("~3 mm", guide p. 25): z 23 … 423.
• Z drives ×4 (z-drive-housing, guide pp. 32–47): 625 bearings, a 5 mm shaft, the 20T 9 mm Z pulley and the 80T reduction pulley, a NEMA 17 with a 16T pulley (80 / 16 = 5:1, guide p. 38).
• Bed (fixed; the gantry flies): two 470 bed extrusions 130 apart (p. 20) on four bed-extrusion-mounts, and bed-plate-350 on four M3 T-nuts (pp. 53–60).
• Z joints ×4 (z-joint): each bolts to a Z block, holds a C end by a pad in its bottom slot, and carries a z-belt-clamp so the clamped Z strand runs vertical.
• Gantry (P6-GANTRY round 2): C ×2 (450), D (430), E (340); MGN9 Y rails (400, 25 from the C ends, p. 88); xy-joint ×2 with D riding over the C's (pp. 104–106); ab-front-idler ×2; ab-drive ×2 with their NEMA 17s and GT2 20T pulleys. C centres at x 41 / 449.
• X axis and toolhead (P6-XCAR): MGN12, 400, on D's front face (p. 101), the MGN12H, the x-carriage carrying both A/B belt ends, and the toolhead-proxy (D3: an original stand-in body with a nozzle_tip frame; the Stealthburner is not modelled).

Out (D1): electronics, wiring, panels, the endstop and cable-chain mounts.

A's printed cartridges

Phase 8's graph twins follow this list.

Cartridge	In A
ab-drive	2
ab-front-idler	2
bed-extrusion-mount	4
corner-idler-bracket	4
toolhead-proxy	1
x-carriage	1
xy-joint	2
z-belt-clamp	4
z-drive-housing	4
z-joint	4

Joints (ASM-1 §9)

Joint	Type	Role	Mate	Limits	Home / follows
z0_shaft_turn	revolute z	follower	z0_shaft_in_a	continuous	-9.00169·gantry_z
z0_motor_turn	revolute z	follower	z0_motor_pulley_on_motor	continuous	-5·z0_shaft_turn
z1_shaft_turn	revolute z	follower	z1_shaft_in_a	continuous	9.00169·gantry_z
z1_motor_turn	revolute z	follower	z1_motor_pulley_on_motor	continuous	-5·z1_shaft_turn
z2_shaft_turn	revolute z	follower	z2_shaft_in_a	continuous	9.00169·gantry_z
z2_motor_turn	revolute z	follower	z2_motor_pulley_on_motor	continuous	-5·z2_shaft_turn
z3_shaft_turn	revolute z	follower	z3_shaft_in_a	continuous	-9.00169·gantry_z
z3_motor_turn	revolute z	follower	z3_motor_pulley_on_motor	continuous	-5·z3_shaft_turn
gantry_z	prismatic x	driven	z0_block_on_rail	[-168.975, 146.025]	home 0
z1_block_follow	prismatic x	follower	z1_block_on_rail	[-180.05, 180.05]	1·gantry_z
z2_block_follow	prismatic x	follower	z2_block_on_rail	[-180.05, 180.05]	1·gantry_z
z3_block_follow	prismatic x	follower	z3_block_on_rail	[-180.05, 180.05]	1·gantry_z
gantry_y	prismatic x	driven	y_block_l_on_rail	[-174, 176]	home 0
motor_l_turn	revolute z	follower	pulley_l_on_shaft	continuous	9.00169·x_carriage + 9.00169·gantry_y
gantry_y_right	prismatic x	follower	y_block_r_on_rail	[-174, 176]	1·gantry_y
motor_r_turn	revolute z	follower	pulley_r_on_shaft	continuous	9.00169·x_carriage + -9.00169·gantry_y
x_carriage	prismatic x	driven	x_block_on_rail	[-175, 175]	home 0

Eight passive revolute joints (z*_shaft_in_b, _in_c) let each Z shaft close its second and third bearings while it turns. Idlers and F695 stacks carry no joint: they are rotationally symmetric and close no cycle.

• x_carriage, gantry_y, gantry_z are the three driven joints. Their limits are exactly the machine's soft range through the bindings below, so every position Klipper can report poses (pose() never clamps).
• D2. One logical Z: the three other Z blocks follow gantry_z one to one; quad gantry levelling tilt is later fidelity.
• CoreXY motors. 360 / (π · 12.73) = 9.00169° per mm on the GT2 20T pitch circle (PD 12.73, Gates 20-2MR, catalog gt2-pulley-20t-5mm). The left motor turns as x + y and the right one as x − y (CoreXY a = x + y, b = x − y). The signs were measured on A's own belt paths by finite differences: moving x or y by 1 mm changes the belt length between the carriage and each pulley by ±1 mm, and the pulley turns that way.
• Z drives. Each output shaft turns z / (π · 12.73) turns (the 20T Z pulley, catalog gt2-pulley-20t-9mm), signed by hand so the clamped strand's side of the pulley rises with the gantry: − on the front-left and back-right, + on the other two. Each motor pulley turns 5 times as far (80 / 16) in the same sense about the world axis; its frame is flipped (it sits on bore_b), hence the scale −5.

Machine bindings (machine, ASM-1 §9.2)

kinematics: corexy (Octopus cfg :34). joint = scale · axis + offset:

Axis	Joint	Scale	Offset	Source
x	x_carriage	1	−175	Klipper X 0 … 350: cfg :56 position_min 0, :68–69 position_endstop / position_max 350. CONVENTION: X 175 at the X rail's mid-length, which centres X over the plate (nozzle x 70 … 420; plate 67.5 … 422.5).
y	gantry_y	1	−174	Klipper Y 0 … 350: cfg :95, :107–108. CONVENTION: Y 0 puts the nozzle over the plate's front edge, y 28 (p. 60: 38 behind the frame's front face at y −10). The nozzle is 43.0 ahead of the Y blocks' centre (P6-XCAR's reach, a convention), so Y 350 puts it at y 378, inside the plate (rear edge 383). The blocks then run −174 … 176, inside their collision-free −176.75 … 177.25 (P6-GANTRY).
z	gantry_z	1	−163.975	Klipper Z: cfg :155 position_min −5, :152 position_max 310, :142 position_endstop −0.5. CONVENTION: Z 0 puts nozzle_tip on the plate's top face: the tip is at z 203.0 at gantry_z 0, the plate's top at 29.5 + 9.525 = 39.025 (bed-plate-350: spacer 9.5, thickness 9.525).

pravara forwards raw axis values; the viewer maps them through these bindings (D4).

Z below 0. gantry_z's lower limit is Klipper's position_min −5, so the proxy's nozzle passes 5 mm into the plate at that one pose. That is declared (below) rather than hidden by a narrower limit: physically the bed stops the nozzle; the twin must still pose every position Klipper reports (owner-programme decision, option (a), 2026-10-05).

Belt paths (ASM-1 §9.3)

Path	Belt	Kind	At home (mm)	Min over the sweep	Max	Spread
z0_reduction_loop	gt2-belt-loop-188mm	closed	188.0062	188.0062	188.0062	0.0000
z1_reduction_loop	gt2-belt-loop-188mm	closed	188.0062	188.0062	188.0062	0.0000
z2_reduction_loop	gt2-belt-loop-188mm	closed	188.0062	188.0062	188.0062	0.0000
z3_reduction_loop	gt2-belt-loop-188mm	closed	188.0062	188.0062	188.0062	0.0000
z0_z_belt	gt2-belt-9mm	open	1048.8525	1048.8525	1048.8525	0.0000
z1_z_belt	gt2-belt-9mm	open	1048.8525	1048.8525	1048.8525	0.0000
z2_z_belt	gt2-belt-9mm	open	1048.8525	1048.8525	1048.8525	0.0000
z3_z_belt	gt2-belt-9mm	open	1048.8525	1048.8525	1048.8525	0.0000
belt_b	gt2-belt-6mm	open	1682.2879	1682.2879	1682.2879	0.0000
belt_a	gt2-belt-6mm	open	1682.2882	1682.2882	1682.2882	0.0000

No path-length warning: the CoreXY belts and the Z belts are constant-length by construction, and the sweep confirms it.

• A and B (gt2-belt-6mm, guide p. 131): from one x-carriage anchor round the XY joints, the drives and the front idlers back to the other anchor, stacked on two levels (p. 125).
• Z ×4 (gt2-belt-9mm, p. 111), open, teeth inside the loop (p. 118): clamp (lower jaw) → Z pulley → top idler → clamp (upper jaw). The anchored strand is the outer one and runs vertical; the inner strand runs free past the C. The guide's 1200 minimum cut (p. 111) leaves about 150 mm for the folded tails.
• Reduction loops ×4 (gt2-belt-loop-188mm, p. 34), closed: 188.006 against the catalog's 188 at the housing's 40.8 centre distance.

Collision (--collision, ASM-1 §3.7)

Checked at home, the six limits and the 16 samples: no undeclared overlap. The 149 declared overlaps are all designed ones, each measured, with max_mm3 at the measured value plus 5–10 % (P6-JOINT's convention):

• keys, tongues and screw shanks in 2020 slots (the catalog's 2020 envelope is the solid profile: no cited slot depth);
• shafts and axles in bores (an envelope has no bore), and M5 screws cutting their thread in printed Ø4.2 pilots;
• the toolhead proxy into the bed plate at gantry_z's lower limit only (Klipper's −5 overtravel, above).

Collision-unchecked (no envelope, named by the check, never silently passed): every tnut-2020-m5 and tnut-2020-m3 (no cited body height), and the gt2-pulley-20t-9mm and gt2-pulley-16t-5mm (no cited flange diameter).

Budget. The whole check, --collision at the default 16 samples, takes about 33 s on the lane's macOS laptop (wall clock, local); it fits every-PR CI.

Declared overlaps

a	b	max mm³	Why
bed_plate	toolhead	190	Klipper's probe overtravel: position_min −5 (VoronDesign/Voron-2 @ a192410, firmware/klipper_configurations/Octopus/Voron2_Octopus_Config.cfg:155) lets Z go 5 mm below the bed's surface, and gantry_z's limits cover the machine's whole soft range so every position Klipper reports poses (D4). Physically the bed stops the nozzle; the twin's proxy nozzle passes 5 mm into the plate at gantry_z's lower limit only. Measured 176.7 mm3 (owner-programme option (a), 2026-10-05).
bed_rail_l	bed_rail_l_back_mount	142	bed_rail_l_back_mount (bed-extrusion-mount) keys its tongue into bed_rail_l's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 132.3 mm3.
bed_rail_l	bed_rail_l_back_mount_screw_bed	116	the bhcs-m5x10 shank runs into bed_rail_l's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bed_rail_l	bed_rail_l_front_mount	142	bed_rail_l_front_mount (bed-extrusion-mount) keys its tongue into bed_rail_l's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 132.3 mm3.
bed_rail_l	bed_rail_l_front_mount_screw_bed	116	the bhcs-m5x10 shank runs into bed_rail_l's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bed_rail_r	bed_rail_r_back_mount	142	bed_rail_r_back_mount (bed-extrusion-mount) keys its tongue into bed_rail_r's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 132.3 mm3.
bed_rail_r	bed_rail_r_back_mount_screw_bed	116	the bhcs-m5x10 shank runs into bed_rail_r's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bed_rail_r	bed_rail_r_front_mount	142	bed_rail_r_front_mount (bed-extrusion-mount) keys its tongue into bed_rail_r's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 132.3 mm3.
bed_rail_r	bed_rail_r_front_mount_screw_bed	116	the bhcs-m5x10 shank runs into bed_rail_r's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	bed_rail_l_back_mount	402	bed_rail_l_back_mount (bed-extrusion-mount) keys its tongue into bx_back's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 374.8 mm3.
bx_back	bed_rail_l_back_mount_screw_frame_a	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	bed_rail_l_back_mount_screw_frame_b	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	bed_rail_r_back_mount	402	bed_rail_r_back_mount (bed-extrusion-mount) keys its tongue into bx_back's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 374.8 mm3.
bx_back	bed_rail_r_back_mount_screw_frame_a	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	bed_rail_r_back_mount_screw_frame_b	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	z2_housing	470	z2_housing (z-drive-housing) keys its tongue into bx_back's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 438.6 mm3.
bx_back	z2_screw_a	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	z2_screw_b	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	z3_housing	470	z3_housing (z-drive-housing) keys its tongue into bx_back's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 438.6 mm3.
bx_back	z3_screw_a	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_back	z3_screw_b	116	the bhcs-m5x10 shank runs into bx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	bed_rail_l_front_mount	402	bed_rail_l_front_mount (bed-extrusion-mount) keys its tongue into bx_front's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 374.8 mm3.
bx_front	bed_rail_l_front_mount_screw_frame_a	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	bed_rail_l_front_mount_screw_frame_b	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	bed_rail_r_front_mount	402	bed_rail_r_front_mount (bed-extrusion-mount) keys its tongue into bx_front's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 374.8 mm3.
bx_front	bed_rail_r_front_mount_screw_frame_a	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	bed_rail_r_front_mount_screw_frame_b	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	z0_housing	470	z0_housing (z-drive-housing) keys its tongue into bx_front's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 438.6 mm3.
bx_front	z0_screw_a	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	z0_screw_b	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	z1_housing	470	z1_housing (z-drive-housing) keys its tongue into bx_front's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 438.6 mm3.
bx_front	z1_screw_a	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
bx_front	z1_screw_b	116	the bhcs-m5x10 shank runs into bx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
by_left	z0_housing	348	z0_housing (z-drive-housing) keys its tongue into by_left's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 324.8 mm3.
by_left	z2_housing	348	z2_housing (z-drive-housing) keys its tongue into by_left's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 324.8 mm3.
by_right	z1_housing	348	z1_housing (z-drive-housing) keys its tongue into by_right's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 324.8 mm3.
by_right	z3_housing	348	z3_housing (z-drive-housing) keys its tongue into by_right's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 324.8 mm3.
c_left	drive_l	234.83	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 213.48 mm³, allowance +10 % (P6-JOINT's convention)
c_left	drive_l_c_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
c_left	front_idler_l	228.45	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 207.68 mm³, allowance +10 % (P6-JOINT's convention)
c_left	front_idler_l_c_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
c_right	drive_r	234.83	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 213.48 mm³, allowance +10 % (P6-JOINT's convention)
c_right	drive_r_c_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
c_right	front_idler_r	228.45	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 207.68 mm³, allowance +10 % (P6-JOINT's convention)
c_right	front_idler_r_c_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
dk_l_screw	dk_l	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
dk_r_screw	dk_r	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
dq_l_screw	dq_l_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
dq_l_screw	dq_l_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
dq_l_screw	dq_l_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
dq_l_screw	dq_l_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
dq_r_screw	dq_r_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
dq_r_screw	dq_r_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
dq_r_screw	dq_r_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
dq_r_screw	dq_r_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
drive_l	dk_l_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
drive_l	dq_l_screw	17.19	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 15.63 mm³, allowance +10 % (P6-JOINT's convention)
drive_l	ds_l_screw	19.07	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 17.34 mm³, allowance +10 % (P6-JOINT's convention)
drive_r	dk_r_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
drive_r	dq_r_screw	16.93	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 15.39 mm³, allowance +10 % (P6-JOINT's convention)
drive_r	ds_r_screw	19.07	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 17.34 mm³, allowance +10 % (P6-JOINT's convention)
ds_l_screw	ds_l_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
ds_l_screw	ds_l_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
ds_l_screw	ds_l_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
ds_l_screw	ds_l_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
ds_r_screw	ds_r_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
ds_r_screw	ds_r_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
ds_r_screw	ds_r_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
ds_r_screw	ds_r_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
fi_l_screw	fi_l	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
fi_r_screw	fi_r	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
front_idler_l	fi_l_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
front_idler_r	fi_r_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
ji_l_screw	ji_l	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
ji_r_screw	ji_r	194.38	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 176.71 mm³, allowance +10 % (P6-JOINT's convention)
joint_l	ji_l_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
joint_l	js_l_screw	19.07	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 17.34 mm³, allowance +10 % (P6-JOINT's convention)
joint_r	ji_r_screw	25.43	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 23.12 mm³, allowance +10 % (P6-JOINT's convention)
joint_r	js_r_screw	19.07	the M5x16 axle's shank in its Ø4.2 pilot in the printed host (the thread it cuts); measured 17.34 mm³, allowance +10 % (P6-JOINT's convention)
js_l_screw	js_l_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
js_l_screw	js_l_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
js_l_screw	js_l_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
js_l_screw	js_l_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
js_r_screw	js_r_f695_1	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
js_r_screw	js_r_f695_2	86.39	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 78.54 mm³, allowance +10 % (P6-JOINT's convention)
js_r_screw	js_r_shim_1	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
js_r_screw	js_r_shim_2	21.59	the M5x16 axle's shank in the bore of the part it carries (envelopes are solid); measured 19.63 mm³, allowance +10 % (P6-JOINT's convention)
motor_l	pulley_l	345.58	the motor's Ø5 shaft in the pulley's bore; measured 314.16 mm³, allowance +10 % (P6-JOINT's convention)
motor_r	pulley_r	345.58	the motor's Ø5 shaft in the pulley's bore; measured 314.16 mm³, allowance +10 % (P6-JOINT's convention)
rear_beam	drive_l	164.65	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 149.68 mm³, allowance +10 % (P6-JOINT's convention)
rear_beam	drive_l_e_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
rear_beam	drive_r	164.65	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 149.68 mm³, allowance +10 % (P6-JOINT's convention)
rear_beam	drive_r_e_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
tx_back	z2_idler_screw_a	116	the bhcs-m5x30 shank runs into tx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_back	z2_idler_screw_b	116	the bhcs-m5x30 shank runs into tx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_back	z3_idler_screw_a	116	the bhcs-m5x30 shank runs into tx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_back	z3_idler_screw_b	116	the bhcs-m5x30 shank runs into tx_back's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_front	z0_idler_screw_a	116	the bhcs-m5x30 shank runs into tx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_front	z0_idler_screw_b	116	the bhcs-m5x30 shank runs into tx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_front	z1_idler_screw_a	116	the bhcs-m5x30 shank runs into tx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
tx_front	z1_idler_screw_b	116	the bhcs-m5x30 shank runs into tx_front's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
ty_left	z0_idler_bracket	323	z0_idler_bracket (corner-idler-bracket) keys its tongue into ty_left's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 301.6 mm3.
ty_left	z2_idler_bracket	323	z2_idler_bracket (corner-idler-bracket) keys its tongue into ty_left's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 301.6 mm3.
ty_right	z1_idler_bracket	323	z1_idler_bracket (corner-idler-bracket) keys its tongue into ty_right's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 301.6 mm3.
ty_right	z3_idler_bracket	323	z3_idler_bracket (corner-idler-bracket) keys its tongue into ty_right's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 301.6 mm3.
u0	z0_idler_bracket	205	z0_idler_bracket (corner-idler-bracket) keys its tongue into u0's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 191.4 mm3.
u1	z1_idler_bracket	205	z1_idler_bracket (corner-idler-bracket) keys its tongue into u1's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 191.4 mm3.
u2	z2_idler_bracket	205	z2_idler_bracket (corner-idler-bracket) keys its tongue into u2's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 191.4 mm3.
u3	z3_idler_bracket	205	z3_idler_bracket (corner-idler-bracket) keys its tongue into u3's slot; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 191.4 mm3.
x_beam	joint_l	172.26	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 156.6 mm³, allowance +10 % (P6-JOINT's convention)
x_beam	joint_l_d_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
x_beam	joint_r	172.26	the printed part's 2 mm tongue in the extrusion's 6 mm slot (the extrusion's envelope is solid); measured 156.6 mm³, allowance +10 % (P6-JOINT's convention)
x_beam	joint_r_d_screw	118.79	an M5 screw's shank in the extrusion's slot, into its T-nut (the extrusion's envelope is solid); measured 107.99 mm³, allowance +10 % (P6-JOINT's convention)
z0_bearing_a	z0_shaft	106	a 5 mm shaft runs through the bore of z0_bearing_a; an envelope has no bore. Measured 98.2 mm3.
z0_bearing_b	z0_shaft	106	a 5 mm shaft runs through the bore of z0_bearing_b; an envelope has no bore. Measured 98.2 mm3.
z0_bearing_c	z0_shaft	106	a 5 mm shaft runs through the bore of z0_bearing_c; an envelope has no bore. Measured 98.2 mm3.
z0_idler_axle	z0_idler	295	the M5 axle runs through the bore of z0_idler; an envelope has no bore. Measured 274.9 mm3.
z0_idler_bracket	z0_idler_axle	62	the M5 screw cuts its thread in the printed pilot of z0_idler_bracket (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 57.8 mm3.
z0_pad_screw	c_left	116	the bhcs-m5x10 shank runs into c_left's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
z0_shaft	z0_big_pulley	379	a 5 mm shaft runs through the bore of z0_big_pulley; an envelope has no bore. Measured 353.4 mm3.
z0_z_joint	c_left	253.97	the z-joint's 6 mm tongue in the C's bottom slot (P6-ASM's pad; the C's envelope is the solid 20 × 20 square); measured 230.88 mm³, allowance +10 % (P6-JOINT's convention)
z0_z_joint	z0_clamp_screw	19	the M5 screw cuts its thread in the printed pilot of z0_z_joint (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 17.3 mm3.
z1_bearing_a	z1_shaft	106	a 5 mm shaft runs through the bore of z1_bearing_a; an envelope has no bore. Measured 98.2 mm3.
z1_bearing_b	z1_shaft	106	a 5 mm shaft runs through the bore of z1_bearing_b; an envelope has no bore. Measured 98.2 mm3.
z1_bearing_c	z1_shaft	106	a 5 mm shaft runs through the bore of z1_bearing_c; an envelope has no bore. Measured 98.2 mm3.
z1_idler_axle	z1_idler	295	the M5 axle runs through the bore of z1_idler; an envelope has no bore. Measured 274.9 mm3.
z1_idler_bracket	z1_idler_axle	62	the M5 screw cuts its thread in the printed pilot of z1_idler_bracket (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 57.8 mm3.
z1_pad_screw	c_right	116	the bhcs-m5x10 shank runs into c_right's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
z1_shaft	z1_big_pulley	379	a 5 mm shaft runs through the bore of z1_big_pulley; an envelope has no bore. Measured 353.4 mm3.
z1_z_joint	c_right	253.97	the z-joint's 6 mm tongue in the C's bottom slot (P6-ASM's pad; the C's envelope is the solid 20 × 20 square); measured 230.88 mm³, allowance +10 % (P6-JOINT's convention)
z1_z_joint	z1_clamp_screw	19	the M5 screw cuts its thread in the printed pilot of z1_z_joint (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 17.3 mm3.
z2_bearing_a	z2_shaft	106	a 5 mm shaft runs through the bore of z2_bearing_a; an envelope has no bore. Measured 98.2 mm3.
z2_bearing_b	z2_shaft	106	a 5 mm shaft runs through the bore of z2_bearing_b; an envelope has no bore. Measured 98.2 mm3.
z2_bearing_c	z2_shaft	106	a 5 mm shaft runs through the bore of z2_bearing_c; an envelope has no bore. Measured 98.2 mm3.
z2_idler_axle	z2_idler	295	the M5 axle runs through the bore of z2_idler; an envelope has no bore. Measured 274.9 mm3.
z2_idler_bracket	z2_idler_axle	62	the M5 screw cuts its thread in the printed pilot of z2_idler_bracket (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 57.8 mm3.
z2_pad_screw	c_left	116	the bhcs-m5x10 shank runs into c_left's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
z2_shaft	z2_big_pulley	379	a 5 mm shaft runs through the bore of z2_big_pulley; an envelope has no bore. Measured 353.4 mm3.
z2_z_joint	c_left	253.97	the z-joint's 6 mm tongue in the C's bottom slot (P6-ASM's pad; the C's envelope is the solid 20 × 20 square); measured 230.88 mm³, allowance +10 % (P6-JOINT's convention)
z2_z_joint	z2_clamp_screw	19	the M5 screw cuts its thread in the printed pilot of z2_z_joint (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 17.3 mm3.
z3_bearing_a	z3_shaft	106	a 5 mm shaft runs through the bore of z3_bearing_a; an envelope has no bore. Measured 98.2 mm3.
z3_bearing_b	z3_shaft	106	a 5 mm shaft runs through the bore of z3_bearing_b; an envelope has no bore. Measured 98.2 mm3.
z3_bearing_c	z3_shaft	106	a 5 mm shaft runs through the bore of z3_bearing_c; an envelope has no bore. Measured 98.2 mm3.
z3_idler_axle	z3_idler	295	the M5 axle runs through the bore of z3_idler; an envelope has no bore. Measured 274.9 mm3.
z3_idler_bracket	z3_idler_axle	62	the M5 screw cuts its thread in the printed pilot of z3_idler_bracket (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 57.8 mm3.
z3_pad_screw	c_right	116	the bhcs-m5x10 shank runs into c_right's slot to its T-nut; the 2020 envelope is the solid profile (no cited slot depth), so the slot is not hollowed. Measured 108.0 mm3.
z3_shaft	z3_big_pulley	379	a 5 mm shaft runs through the bore of z3_big_pulley; an envelope has no bore. Measured 353.4 mm3.
z3_z_joint	c_right	253.97	the z-joint's 6 mm tongue in the C's bottom slot (P6-ASM's pad; the C's envelope is the solid 20 × 20 square); measured 230.88 mm³, allowance +10 % (P6-JOINT's convention)
z3_z_joint	z3_clamp_screw	19	the M5 screw cuts its thread in the printed pilot of z3_z_joint (Ø4.2, as P4-AUTH-E measured for the corner idler). Measured 17.3 mm3.

Conventions (labelled; not sourced facts)

• Home: every driven joint at 0 (mid-travel); the sweep: 16 Halton samples, seed 1 (ASM-1 §9.4).
• The X, Y and Z offsets above; the nozzle's 43.0 reach and the tip's height (P6-XCAR).
• The Z blocks' centres sit 10 below the C's centre line (the z-joint pad's top is the C's bottom face).
• The bed plate's holes 150 either side of its centre (no listing publishes the pattern).
• The belt levels and element stations of the gantry cartridges (their READMEs).

History

• Phase 4's A (solid ce632af, #147; digest a60c6e34… on keystone 5b4913c): a 29-component static subset. One braced frame corner and one blind-jointed top corner with the Z idler, an MGN12 rail and block carrying the Stealthburner as an external reference, one NEMA 17 on a nema-bracket, an endstop and a drag-chain anchor, and a 608 idler on an 8 mm axle in a roller-bracket.
• The owner's idler decisions (2026-10-04). (a) The 608 idler chain stood as a documented layout convention (#143); (b) the build guide was checked and no cited Voron idler maps onto a 608 on an 8 mm axle: the 2.4 uses F695, 625 and GT2 idlers on M5 hardware (pp. 8, 48–50, 65, 69, 83, 91–100) (#144).
• Superseded in Phase 6 by this composition (D1). The 608 chain, nema-bracket, roller-bracket, tslot-corner and the tslot-2020 brace leave A (no 2.4 counterpart; the cube is blind-jointed), and so do the endstop and cable-chain mounts (D1: electronics out).

Check it

pip install "hyperobjects-spec[geometry] @ git+https://github.com/madfam-org/hyperobjects-spec@<SPEC_PIN>"
parts=$(python -c 'import hyperobjects_standard_parts as h, pathlib; print(pathlib.Path(h.__file__).parent / "parts")')
y4d-spec assembly check assemblies/voron-2-4-class-350-motion-frame/assembly.json \
    --commons . --standard-parts "$parts" --collision
y4d-spec assembly poses assemblies/voron-2-4-class-350-motion-frame/assembly.json \
    --commons . --standard-parts "$parts"        # the golden pose file (ASM-1 §9.5)

SPEC_PIN is in .github/workflows/ci.yml. CI runs the check, with --collision, on every PR (the assemblies job).

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Español

Ensamble A del programa de gemelos digitales: el sistema de movimiento completo de una impresora CoreXY clase Voron 2.4 350 (decisión D1), posable (ASM-1 §9). Lo verifica y4d-spec assembly check en la posición inicial, en cada límite y en el barrido, con --collision. Licencia del documento: CERN-OHL-W-2.0.

• Contenido: el cubo del marco 350 con uniones ciegas; cuatro esquinas superiores con su polea Z; cuatro rieles Z MGN9 (pp. 25, 27); cuatro accionamientos Z con reducción 5:1; la cama fija con su placa; el pórtico volante (C, D, E, rieles Y, uniones XY, poleas delanteras y accionamientos A/B) colgado de cuatro uniones Z originales; el riel X MGN12, el carro X y un sustituto original del cabezal (D3).
• Articulaciones: x_carriage, gantry_y (el carro Y derecho la sigue) y gantry_z (los otros tres carros Z la siguen, D2) son las motrices; los motores A/B giran como x + y y x − y, y cada flecha y motor Z como seguidores.
• Enlaces de máquina: corexy, con X, Y y Z de Klipper (configuración de referencia Octopus de Voron, citada por línea) mapeados a las articulaciones; Z 0 pone la punta de la boquilla sobre la cara superior de la placa, Y 0 sobre su borde delantero.
• Bandas: A y B, cuatro bandas Z y cuatro lazos de reducción; longitud constante en todo el barrido, sin advertencias.
• Colisiones: solo interferencias de diseño, medidas y declaradas, incluida la boquilla 5 mm dentro de la placa en el límite inferior de Z (sobrerrecorrido de Klipper, −5).
• Historia: sustituye al A estático de la fase 4 (29 componentes, ce632af), con sus decisiones de la polea 608 (a)+(b) registradas arriba.

Ninguna geometría Voron se copia; la guía de armado (GPL-3.0) se cita solo por página.