Rapid Position zero point off after crash

I make fixtures that zero out on my guide rails, which themselves are zeroed out at the SW rapid position location.

Had the dust boot on my Pro at a jaunty angle and during a tool change, it got caught between the router and the side rail. Pulled it out quick but not before some cringe-worthy noises.

Now my SW zero point is about 1/8" inboard (in X & Y) of its previous position, and initializing and machine reboots don’t reset it. Everything else seems fine, just can’t use my fixtures as planned.

Any ideas on how to get it back?

Could the crash have moved the homing sensor?

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Good question… It crashed into the right-front-rail end plate (where power button is) just before reaching the Bitsetter.

Put the dust boot back on and carefully recreated it but it doesn’t get near the X sensor. And no sensors are loose.

If you ‘Change tools’ does it still line up over the BitSetter the way it did before? Or is it off consistent with the amount it is off at the fixture?

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This is a long shot but resend the configuration and then initialize. See if that helps.

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Have you re-initialized after the crash? After you skip steps like what usually happens in a crash, you need to do that so the machine gets its bearings again. :slight_smile:

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The Bitsetter position has not changed.

Re-sent configuration but no change.

Re-initialized at least a dozen times but no joy…

A crash would seem to indicate a mechanical problem — try this — move the gantry all the way to the front of the machine, power off, and pull both sides of the gantry flush against the front endplates, then power up and initialize — does that restore the position?

Another thing to check is the belts — power down and remove them (labeling them so you can swap them end-for-end and side-for-side when reinstalling) and inspect them — if they’re okay, reinstall, swapping as described, if not, replace them.

Failing all that, you can adjust where the Rapid Position points fall in a couple of ways:

  • adjusting the homing switch positions, or when applicable the size/shape of the machine elements which trigger them (is it possible that something is bent?
  • changing the Travel Dimensions
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Tried moving to front manually and then initializing but same thing. Also, removed and reinstalled all belts. No change.

How would I go about adding the delta back into the SW position?

If everything checks out mechanically, then possible ways to adjust where the grid of movement is placed are:

  • changing the Travel Dimensions
  • changing the homing pull off dimensions
  • adjusting the position of the homing switches
  • changing the steps/mm calibration (which will shift the size of the movement grid overall from the machine origin)

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