Step 02.05 — Confirm the four Z rails are already cleaned and greased¶
Step 5 of 44 with a helper · Chapter 02 — Z drives, Z idlers, Z rails, deck panel
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Gather for this segment — steps 02.05–02.08 (~25 min)
Fasteners, Tools & Misc box
- M3×8 SHCS ×9
- M3 roll-in T-nut ×9
Linear Rail Kit box
- MGN9H 400 mm rail ×1
Printed parts
MGN9_rail_guide_x2jigs ×2 · bin 00-jigs
Tools and consumables
- 3 mm hex key as the gap feeler
- masking tape, or the rail's plastic shipping stoppers
Set out for later steps
- MGN9H 400 mm rail ×3, labelled Z0–Z3
Already on the bench
- the first Z rail and its nine started screws
Parts:
- MGN9H 400 mm rail ×4, labelled Z0–Z3 · set out now, fitted later
Do:
- Unbag the four rails marked Z0–Z3; check labels and carriage tape.
- Run each carriage end to end: smooth and silent, not dry or notchy.
- Work over the bench, never the floor: a dropped carriage is scrap.
Check
Four labelled rails on the bench, carriages taped or stoppered, each smooth and silent over full travel, no grease on any rail's outside.
Helper Runs each carriage end to end over the bench and says smooth or notchy.
What you're looking at
Manual p.24 shows a linear rail and its carriage. These four MGN9H rails are the vertical tracks the gantry's corners ride on. They were degreased and packed with grease in Ch 00, because that job needs the back of the rail. See the glossary.
Caution
Rev D+ / LDO: the kit does not include grease, and the rails ship with a shipping oil rather than a lubricant. If you do have to prep a rail here, use NLGI 0 or NLGI 1 — Super Lube 21030, Mobilux EP1/EP2, or white lithium — never a thin oil or a PTFE dry lube. src
Tip
If a rail was missed, do Ch 00 Steps 00.18–00.20 on it now and let it dry completely before it goes near the frame.
Source: Voron manual p.24 · LDO rail grease guide · LDO Build Notes (Rev D)