Archive for September 30th, 2019

CNC 3018-Pro: Hard Drive Platter Fixture

A variation on the CD fixture produces a 3.5 inch hard drive platter fixture:

Platter Fixtures - Hard Drive on 3018
Platter Fixtures – Hard Drive on 3018

Which needed just a touch of milling for a snug fit around the platter:

CNC 3018-Pro - HD platter fixture - test fit
CNC 3018-Pro – HD platter fixture – test fit

Tape it down on the 3018’s platform, set XY=0 at the center, and It Just Works™:

CNC 3018-Pro - HD platter fixture - 70 g
CNC 3018-Pro – HD platter fixture – 70 g

The rather faint line shows engraving at -1.0 mm = 70 g downforce isn’t quite enough. Another test with the same pattern at -3.0 mm = 140 g came out better:

CNC 3018-Pro - HD platter fixture - 140 g
CNC 3018-Pro – HD platter fixture – 140 g

It’s in the same OpenSCAD file as the CD fixture, in the unlikely event you need one.

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