CNC 3018-Pro: CD Fixture Probe Camera Target

Taping the CD fixture to the CNC 3018-Pro’s raised platform solves the repeatability problem by putting the CD at a fixed location relative to the machine’s Home coordinates. The next step puts the XY=0 coordinate origin at the exact center of the platter, so the pattern comes out exactly centered on the disc:

CNC 3018-Pro - CD fixture
CNC 3018-Pro – CD fixture

The fixture has a central boss:

Platter Fixtures - CD on 3018 - tape flange
Platter Fixtures – CD on 3018 – tape flange

The blue boss centers the CD’s hub hole, the red plateau supports the disc, and the white background lies 5 mm below the CD’s upper surface:

CNC 3018-Pro - CD holder target
CNC 3018-Pro – CD holder target

Yup, red and blue Sharpies FTW.

The bCNC probe camera image includes two faint cyan rings centered on the crosshair:

CNC 3018-Pro - bCNC probe camera - red-blue CD target
CNC 3018-Pro – bCNC probe camera – red-blue CD target

Set the diameter to 15 mm (or a bit less), center the outer ring on the hub hole = the border between blue & red, set XY=0, and it’s within maybe ±0.1 mm of the true center.

Done!

, ,

  1. CNC 3018-Pro: Hard Drive Platter Fixture | The Smell of Molten Projects in the Morning

Spam comments get trashed, so don't bother. Comment moderation may cause a delay.

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s