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A axis will only rotate one way with soft limits enabled

Discussion in 'CNC Mills/Routers' started by Fastbass, Nov 3, 2024.

  1. Fastbass

    Fastbass New
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    Doing a 2 sided job with rotary axis flipping part 180 degrees, with soft limits enabled and A axis zeroed at the start of the job, when program calls for 180 degree rotation a axis rotates in negative direction and rotates continuous, not stopping at 180. It will not rotate positive with soft limits enabled, say unable to jog A+, will hit soft limits. so the DRO for A axis will only read in negative values, no way to get it to rotate positive. Any advise would be wonderful. X32 controller, I forgot to mention that sorry.
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Set A-axis Max Travel to "-1" to allow it unrestricted rotation. Normally only positive moves are in the machine envelope, to use negative spin (or outside 0-359deg either direction) with soft limits set A Axis Max Travel to -1
     
    David the swarfer likes this.
  3. Fastbass

    Fastbass New
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    Thanks Peter!!!!!
     
  4. Fastbass

    Fastbass New
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    it wont allow me to put in -1, says only excepts positive values and defaulted back to 360
     
  5. Fastbass

    Fastbass New
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    you were talking about $133 correct?
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Will have to check the docs again, but perhaps its 0 instead of -1 that disables it.
     
  7. Fastbass

    Fastbass New
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    I set $133 to 0 and it let me rotate axis positive and negative.... zeroed A axis and started job, 1st movement is to rotate axis 180 degrees, it started rotating and did not stop, had to stop job, here is the interesting part, rotated axis negative to get back to zero point, got to zero now it wont rotate positive due to soft limits. perplexing to say the least, so there are 2 issues at play here i think 1: it wont stop axis at gcode coord. and 2nd is the issue of not rotaing positive with soft limits enabled. It wont stop at programmed coord with soft limits enabled or disabled if that is helpful. Thanks in advance.
     
  8. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Might be best to ask here https://github.com/grblHAL/core/issues
     

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