Step 02.06 — Fit the first Z rail, centred, with the MGN9 guides¶
Step 6 of 44 · Chapter 02 — Z drives, Z idlers, Z rails, deck panel
Tap to enlarge
Parts:
- MGN9H 400 mm rail ×1 · Linear Rail Kit box
- M3×8 SHCS ×9 · Fasteners, Tools & Misc box
- M3 roll-in T-nut ×9 · Fasteners, Tools & Misc box
-
MGN9_rail_guide_x2jigs ×2 · bin 00-jigs - 3 mm hex key as the gap feeler · tool
Do:
- Slip a
MGN9_rail_guideover each rail end. - Pre-load nine M3 T-nuts in the front-left vertical's rear-looking face.
- Rest the rail on a 3 mm hex key and start nine screws finger-tight in holes 2, 4 … 18.
Check
Rail centred on the front-left vertical's rear-looking face, sitting on the 3 mm key, all nine screws started, both end holes empty.
What you're looking at
Manual p.25 shows a rail going onto a vertical extrusion, with the printed rail guides drawn in green. The guides straddle rail and extrusion and hold the rail centred on the 20 mm face while you start the screws.
Caution
Rev D+ / LDO: p.25 draws a screw in every other hole from the end hole. LDO's "do not use the holes on the ends of the rails" is written for p.88; the survey applies it to every rail (§4.4 #6). So shift one hole in: holes 2, 4 … 18, leaving 1, 19 and 20 empty. src
Tip
Tape-mark the nine holes before you start. Test-fit each T-nut: if one jams, swap the nut, not the face. On the rear verticals the rail faces forward.
Tip
Peel the two end-stop bands from Step 00.17 only with the rail lying flat on the bench, never on edge or with the carriage near an end.
Source: Voron manual p.25 · LDO Build Notes (Rev D)