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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  1. #1 by david on 2019-10-01 - 18:07

    In the ‘very random question’ category: doesn’t that make an awful, terrible screeching noise? It makes me nauseated just thinking about it. (But then again, I suppose you wouldn’t know… lucky you. :) )

    • #2 by Ed on 2019-10-01 - 21:08

      Even wearing my power ears, the diamond point makes a soft scritching on CDs and hard drive platters.

      Seeing as how Mary hasn’t come downstairs to see what’s happening, it must not be too awful, even for someone with treble in her life.

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