Step 03.10 — Trim the magnet at the four bolt holes¶
Step 10 of 20 · Chapter 03 — Build plate
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Parts:
- the applied magnetic pad · already on the bench
- sharp craft knife · tool
- M3×20 SHCS ×1, fit test · set out now, fitted later
- 2.5 mm hex key · tool
Do:
- Press down to find the four counterbored holes as dimples.
- Cut the magnet away over each one, following the bore, in light repeated passes.
- Do not gouge the aluminium; a burr stops the bolt head sitting flush.
Check
All four bores fully open. Test each with an M3×20 SHCS and the hex key before you go anywhere near the frame.
What you're looking at
The laminated magnet with four dimples where the plate's counterbored corner holes sit underneath. The mounting bolts pass through those holes and a hex key has to reach their heads, so the magnet is cut away over each one.
Caution
Rev D+ / LDO: LDO's note at p.54 exists because the magnet gets applied here and the bolts do not go in until p.59. Trimming now costs two minutes; discovering it at p.59 costs the magnet (survey §5.2 W6). src
Good stopping point · ~30 min since the last one
the top face is cleaned, the magnet is rolled down bubble-free and all four bolt holes are cut clear through it and test-fitted with an M3×20 and a hex key. The lamination is finished, so nothing is mid-adhesive. Lay the plate flat, magnet up, and cover it.
Source: Voron manual p.54 · LDO Build Notes (Rev D)