Bridgeport Interact II not 0

Posted by

on 2016-10-09 10:26:56 UTC

I've been running my Bridgeport Interact II with Geckos and Mach 3 for a couple years. Thot I had it pretty "dialed in" - motor tuning set very close to 20000. Yesterday I started a job that drilled a hole at 0,0, moved and drilled holes at (+/-X,0) and (0,+/-Y) then returned to 0,0 to start another part of the job. Even though MACH says I'm back at 0,0,0, the tool was visually off. I recentered and it appears to have been off at least in X by 0.033", Y.. maybe 0.005 ish. After recentering (visually) I cut a circle, which cut within about 0.001" dia, and that's with no backlash compensation in MACH.

Need help understanding this...

Missing steps? - rapids were only like 15 ipm, "sounded good" while moving, I was VERY surprised to literally see it noticeably off center.

Backlash? - seems good based on the circle I cut

What am I missing??

THANKS!

Discussion Thread

2016-10-09 10:26:56 UTC Bridgeport Interact II not 0 Jon Elson 2016-10-09 16:38:09 UTC Re: [CAD_CAM_EDM_DRO] Bridgeport Interact II not 0