Batch B01 — Z drive assemblies

One page per step

Read this chapter one step per page — big pictures, prev/next, and the same tick marks. This page is the whole chapter in one scroll.

Every Z-drive part with a bearing seat, so it waits for Gate B (the 625-2RS bore test) — which now runs early, on a caliper across the printed pocket, so this batch prints second, straight after B00.

The first real parts. They hold bearings, so Gate B has opinions and the final say.

Time: 22.8 h (2 plates) — PrusaSlicer 2.9.6 estimates.

Sessions: 2 plate starts (~5 min hands-on each, 15.2 h and 7.6 h unattended) + ~15 min inspect + ~10 min sort into bins.

Prerequisites: Gate B passed (Step B00.7 — the 625-2RS pocket calipered and seven real inserts set, both run early on what is already on the bench; Gate B's bearing press and MGN12 rail row wait for the kit and gate nothing on this plate). Gate A alone does not release this batch. Note: fully completing the Z Drives and Idlers assembly chapter also needs the accent parts from B02 ([a]_z_drive_baseplate_a/b, [a]_belt_tensioner_a/b, [a]_z_tensioner_9mm_x4), printed straight after this batch and long before the kit — plan §9 lists hard prerequisites B00;B02 for that chapter.

Printed parts

STL	Repo path	Qty	Colour	g ea	Bin
z_drive_main_a_x2.stl	Voron-2 STLs/Z_Drive/	2	Black	39.4	02-Z0, 02-Z2 (one each)
z_drive_main_b_x2.stl	Voron-2 STLs/Z_Drive/	2	Black	39.4	02-Z1, 02-Z3 (one each)
z_drive_retainer_a_x2.stl	Voron-2 STLs/Z_Drive/	1 (second copy; first was on B00)	Black	19.5	02-Z2
z_drive_retainer_b_x2.stl	Voron-2 STLs/Z_Drive/	2	Black	19.5	02-Z1, 02-Z3 (one each)
z_motor_mount_a_x2.stl	Voron-2 STLs/Z_Drive/	2	Black	11.9	02-Z0, 02-Z2 (one each)
z_motor_mount_b_x2.stl	Voron-2 STLs/Z_Drive/	2	Black	11.9	02-Z1, 02-Z3 (one each)
z_tensioner_bracket_a_x2.stl	Voron-2 STLs/Z_Idlers/	2	Black	13.0	02-Z0, 02-Z2 (one each)
z_tensioner_bracket_b_x2.stl	Voron-2 STLs/Z_Idlers/	2	Black	13.0	02-Z1, 02-Z3 (one each)
deck_support_3mm_x8.stl	Voron-2 STLs/Panel_Mounting/	8	Black	1.1	02-deck

Deck-support thickness (verify)

LDO's Rev D printed-parts guide says "our kit ships with 4 mm deck panels, use 4 mm deck support clips," but the Rev D 350 BOM lists the deck panel as 3 mm acrylic (the 4 mm panel is the bottom panel). The size-specific BOM wins: print deck_support_3mm_x8 ×8 now, and measure the deck panel at Ch 00 Step 00.4 — if it measures 4 mm, reprint deck_support_4mm_x8 (8 g, 30 min). The panel only exists on kit day, months after this plate, so the 3 mm set is printed on the BOM's word and the reprint is the one plate the build may still owe when the cartons land.

Hardware: none.

Read first

• The parts come in mirrored pairs: every _a file has a _b twin, and each Z corner takes either the a set or the b set — two corners of each. They are not interchangeable, so Step B01.8 sorts them into the four corner bins 02-Z0–Z3 by hand, not four identical sets.
• Checkpoint after B01: caliper each z_drive_main and z_drive_retainer 625-2RS pocket, 16.30 mm ±0.15 (measured off the STL, as at Gate B). The bearings arrive with the kit, so pressing a real 625-2RS (16 mm OD) in by thumb, no rocking, is a kit-day row. No inserts now: the kit's own go in at Ch 02 Step 02.04. Check the 4 mm/3 mm deck-support call above.
• Most commonly reprinted here: z_drive_main_* — the largest single parts in the batch, most exposed to warp at the corners.
• Plate B01-P1 is the longest single plate in the whole build (15.2 h) — start it in the morning, not at bedtime.

Step B01.1 — Filament prep

Do:

1. Confirm the Galaxy Black spool is loaded and dried within the last 2 weeks, or fresh.
2. Spool #1 came off B00 with 748 g by the ledger. This batch alone is 301 g.

Check

B01-P1 needs ≥ 201 g on the spool at start; the README ledger has spool #1 at 748 g.

Tip

A kitchen scale, if you own one, turns the ledger into a check. It is optional; the ledger works from the slicer grams.

Source: print plan §4.3 — spool changes · 00-slicer-setup § Drying · Prusa KB — ASA

Step B01.2 — Load plate B01-P1

Sorting diagram, drawn from the committed project: every part numbered and filled in the colour of its bin, bin id on the part; the legend reads # · STL · bin (chapter · steps). Sort at Step B01.8.

Do:

1. Open slicer/plates/B01-P1.3mf with File → Open Project. Do not rebuild the plate.
2. Confirm: profile 0.20mm STRUCTURAL @COREONE 0.4 (modified), 5 files, 7 objects, no brim outline.
3. Do not change which face sits on the bed. Parts: z_drive_main_a ×2 · z_drive_main_b ×2 · z_drive_retainer_a ×1 · z_drive_retainer_b ×2 — 15.2 h, 201 g (PrusaSlicer 2.9.6 estimate).

Check

Estimated plate time is 15 h 13 m; if far off, re-verify profile/overrides before committing an overnight print.

Helper: Reads the sorting diagram legend aloud and counts the parts on it while you load.

Source: print plan §3 — the batches · 00-slicer-setup § Committed projects · 00-slicer-setup § Orientation & brim

Step B01.3 — Pre-print checks

Do: Prepare the sheet per 00-slicer-setup § Print sheet with the glue film renewed, confirm the spool is dry, and start the chamber preheating.

Check

Chamber reads ≥40 °C before purge; Settings → Chamber Filtration reads Adv. Filtration.

Source: 00-slicer-setup § Print sheet · 00-slicer-setup § Calibration sequence · Prusa KB — ASA

Step B01.4 — Print plate B01-P1

Do: Start in the morning or at the start of a full workday: this is the 15.2 h plate.

Check

First layer clean; no corner lift on the z_drive_main bodies partway through.

Tip

look at the first layer, the corners after an hour, and at bedtime. A lifted corner is a stop. Paused or stopped: When the printer stops.

Good stopping point · ~5 min since the last one

B01-P1 running, 15.2 h unattended, door shut. Meanwhile: read Ch 02, sort the last plate, label bins.

Source: 00-slicer-setup § Overrides · print plan §4.1 — how these numbers were produced

Step B01.5 — Load plate B01-P2

Sorting diagram, drawn from the committed project: every part numbered and filled in the colour of its bin, bin id on the part; the legend reads # · STL · bin (chapter · steps). Sort at Step B01.8.

Do:

1. Open slicer/plates/B01-P2.3mf with File → Open Project. Do not rebuild the plate.
2. Confirm: 5 files, 16 objects, no brim. Parts: z_motor_mount_a ×2 · z_motor_mount_b ×2 · z_tensioner_bracket_a ×2 · z_tensioner_bracket_b ×2 · deck_support_3mm ×8 — 7.6 h, 100 g (PrusaSlicer 2.9.6 estimate).

Check

All 8 clips on the plate, 3 mm per the BOM; the kit-day caliper decides a 4 mm reprint.

Helper: Counts the parts on the sorting diagram and checks the total against the object count.

Caution

z_motor_mount_a/b are 42.0 mm tall, borderline aspect. Only if a motor mount lifts on this print, add a 5 mm brim to those four objects by hand for the reprint: right-click the object → Add settings → Skirt and brim → Brim width. Never the global setting, per 00-slicer-setup.

Source: print plan §3 — the batches · 00-slicer-setup § Committed projects · 00-slicer-setup § Orientation & brim · LDO Rev D printed-parts guide · LDO Rev D 350 BOM

Step B01.6 — Print plate B01-P2

Do: Start after P1 is pulled and inspected.

Check

No warp at the corners of the motor mounts.

Tip

Paused or stopped mid-plate? See When the printer stops.

Source: 00-slicer-setup § Overrides · print plan §4.1 — how these numbers were produced

Step B01.7 — Inspect

Do:

1. Now: caliper each z_drive_main and z_drive_retainer 625-2RS pocket, a 16.30 mm bore.
2. Log every reading.
3. Kit day: thumb a real 625-2RS into every seat, no rocking.

Check

Every pocket reads 16.30 mm ±0.15. A part outside that is reprinted, never forced.

Helper: Reads each caliper number back aloud and writes it into the log.

Good stopping point · ~15 min since the last one

every pocket calipered and logged. Nothing pressed or inserted: the bearings are a kit-day row, and Ch 02 Step 02.04 seats the inserts with the parts sorted.

Source: print plan §5.2 — checkpoint after each batch · 00-slicer-setup § Gate B · Voron materials — shrinkage 100 %

Step B01.8 — Sort into bins

Do:

1. Sort each plate off its diagram: the number on a part is its legend number, the colour its bin.
2. Write bin id, plate id and date on the inside face of every _a / _b part.

B01-P1

bin	parts off this plate
02-Z0 — Z0 corner (front-left, _a hand)	z_drive_main_a
02-Z1 — Z1 corner (rear-left, _b hand)	z_drive_main_b, z_drive_retainer_b
02-Z2 — Z2 corner (rear-right, _a hand)	z_drive_main_a, z_drive_retainer_a
02-Z3 — Z3 corner (front-right, _b hand)	z_drive_main_b, z_drive_retainer_b

B01-P2

bin	parts off this plate
02-Z0 — Z0 corner (front-left, _a hand)	z_motor_mount_a, z_tensioner_bracket_a
02-Z1 — Z1 corner (rear-left, _b hand)	z_motor_mount_b, z_tensioner_bracket_b
02-Z2 — Z2 corner (rear-right, _a hand)	z_motor_mount_a, z_tensioner_bracket_a
02-Z3 — Z3 corner (front-right, _b hand)	z_motor_mount_b, z_tensioner_bracket_b
02-deck — Deck panel clips	deck_support_3mm ×8

Check

02-Z0 to 02-Z3 each hold one z_drive_main, one z_drive_retainer, one z_motor_mount and one z_tensioner_bracket of the right hand, ids written on the parts; 02-deck holds 8 clips.

Helper: Reads each bin label aloud and checks the count against the diagram.

Caution

02-Z0's z_drive_retainer_a is the Gate B coupon printed on B00, so it is not on these plates. B02's blue baseplates and tensioners join these bins next batch.

Tip

Print the bin labels from the bin-labels sheet. Mark the 02-deck bin "3 mm clips, confirm against the calipered panel".

Good stopping point · ~10 min since the last one

both plates sorted into 02-Z0 … 02-Z3 and 02-deck, bin ids written on the inside face of every part. Nothing is pressed or inserted; Ch 02 does that from the bins.

Source: print plan §9 — batch summary · print plan §2 — which parts gate which step · print/README § Bins

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While a long plate runs

Seven plates in this build run past eight hours and one runs past fifteen. None of them wants watching, but all of them want three looks: the first layer, the corners after an hour, and once more at bedtime. A lifted corner is a stop, not a wait — abort, clear the sheet, renew the glue film and restart, rather than letting the plate print another six hours on top of it.

Fifteen hours. Watch the first layer, then walk away. A champion can supervise from a spool.

The rest of the time the printer is working for you and the bench is free. In order of value: read the assembly chapter the running batch feeds, sort and label the previous plate into its bins, and print or write the bin labels you are still missing.

Checkpoint B01

• Gate B passed before B01-P1 started (Step B00.7)
• Every z_drive_main_a/b and z_drive_retainer_a/b 625-2RS pocket calipers 16.30 mm ±0.15
• (kit day) a real 625-2RS presses into every z_drive_main_a/b seat by thumb, no rocking
• (kit day) a real 625-2RS presses into every z_drive_retainer_a/b seat by thumb, no rocking
• (kit day) Deck panel measured; correct deck-support thickness confirmed or deck_support_4mm_x8 reprinted
• No corner lift or delamination on any z_drive_main body
• Bins 02-Z0–Z3 each hold one matched set of the right hand, bin id written on every part; 8 clips in 02-deck

Batch B01 printed: plates 2 to 3 of 22, 26.8 of 157.0 h. 2 gummy worms.

Common mistakes

• Starting the 15.2 h P1 plate late in the day and having it finish unattended overnight with no chance to abort a bad first layer.
• Starting B01 on Gate A alone — Gate B's bore caliper is what protects these 22.8 h.
• Trying to make four identical sets from two a and two b of each part — the sets are mirrored; the corner bins are not interchangeable.
• Assuming the deck-support thickness without measuring the actual panel.
• Forcing a tight bearing seat with a press instead of reducing extrusion multiplier for the reprint.

Next

Assembly: Z Drives and Idlers (Ch 02), with B02's accent parts already on the shelf. Printing: B02 — Accent parts (blue), the colour change.