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#168 Threading/tapping with spindle running backward: no motion

closed-fixed
5
2010-11-01
2008-09-29
Chris Radek
No

With the spindle running CCW (M4), G33 and G33.1 commands result in no motion.

To reproduce:

S300 M4 G0 Z0
G33 Z-1 K.1

expected result: synchronized move to Z=-1
actual result: no motion and the "move" never completes.

Discussion

  • Michael Haberler

    looks like its related to: [emc-Bugs-3092250 ] near.9 component broken for negative inputs

    this caused spindle-at-speed detection to fail when spindle running CCW

    near.comp is now fixed and the same scenario as above now works fine for me

     
  • Jeff Epler

    Jeff Epler - 2010-11-01

    Another part of this bug had been fixed in commit 57c8a38924185f81bf3727aa60b434d73413cb4c
    Author: Chris Radek <chris@timeguy.com>
    Date: Fri Jun 18 09:46:13 2010 -0500

    Fix threading and tapping with spindle turning backward (M4)
    this was in emc2.4.2 and newer.

     
  • Jeff Epler

    Jeff Epler - 2010-11-01
    • status: open --> closed-fixed