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Messages - robotgraves

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Mach4 General Discussion / Re: Mach4 Re-Zeroing mid run
« on: August 21, 2020, 09:30:56 AM »
Yeah one of the suggestions was that the stepper was losing steps.   My acceleration and top speed are all set by Avid CNC in their profile. 

I contacted them about the issue, and their suggestion was to switch the Z motor smoothstepper pins to be Active Low instead of Active High, but they didn't know why that has been helping with some of the issues they have seen.

They did also say that the pins already have the highest noise filtering on, but the line in the ESS is just "-----"

Mach4 General Discussion / Re: Mach4 Re-Zeroing mid run
« on: August 19, 2020, 07:18:05 PM »
A ground loop shouldn't be an issue, I am using a pre-configured controller box.  The hardware inside I can trust with confidence, they test it on site before shipping.  The problem is also new, I had a month or so of confident running, so I think the RF noise sounds most probable.

I don't know what "close the loop" means?

Mach4 General Discussion / Re: Mach4 Re-Zeroing mid run
« on: August 19, 2020, 06:47:57 PM »
noise problem: do you mean like this issue? https://www.machsupport.com/forum/index.php?topic=11760.0

That could be possible.  I can confirm that after it happens, the Mach4 Position and the Actual Position are not consistent.  That is why I thought the issue was zero related, but if the Z axis is enduring RF noise until the smoothstepper can't handle it, that could be possible.  Mach4 wouldn't shut off in that scenario? Or is there a way to make a warning if Mach4 is enduring too much noise?

Mach4 General Discussion / Mach4 Re-Zeroing mid run
« on: August 19, 2020, 05:38:21 PM »
Hey, this is my first post.  I'm trying to find some support out there to help me troubleshoot my issue

The quick one sentence issue: In the middle of one specific program, my machine sets its zero about 1/4" - 1/2" higher than what I set it at.

  • My Machine: Avid PRO CNC 6060 with their plug and play controller, NEMA 34 motors, extended Z travel
  • My gcode: attached
  • What I am machining: An aluminum guitar neck.  Specifically, this file is for the fret slots themselves
  • What is happening: At random parts during this gcode, something is happening to reset my z higher up.  I haven't SEEN the machine do it, it happens when I walk away, which makes it even more annoying.

What I don't think is the issue:
  • The gcode itself.  the problem has happened in the same spot twice, and then in a different spot a third time.  it has also run cleanly
  • The Z pushing too hard down, not penetrating, and leaving with an inaccurate Z.  the bit is a 0.030 mill head, it would snap way before the nema 34 failed
  • overhead.  the room is ACed and should be well cool enough to run

But otherwise, I'm open to hear any possible causes.  It has happen 3 times in a row now, and I am at my wits end trying to find support for any sort of possible solutions.  possible bug? possible contamination in my controller box?  Possible code importing incorrectly from my USB?  Possible something I can't imagine?  Possible it is skipping a line, and it is always a G1 down to depth, leaving it too high all run?

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