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Author Topic: M10Px/M11Px synchronous with motion  (Read 661 times)

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M10Px/M11Px synchronous with motion
« on: June 12, 2018, 04:53:27 AM »
Hi All,

I'm running a CNC Plasma machine with Mach3 and Torch Height Control. The THC uses the M10Px/M11Px commands to turn the THC on and off at various points in the cut (corners, holes,etc). However, I've found that its issuing the commands non-synchronously with motion, so if it issues during a straight line cut, it decelerates as it gives the command,then speeds up again after.

Using the UC300ETH-5LPT (ethernet motion controller) with a normal BOB, laptop OS is Windows 10. I suspect its a Mach3 setting, but can't but my finger on it. Any suggestions? Could it be an SV setting, or something else?

I suspected it could be because of the newest version 3.043.066. So I changed to 3.043.062, but problem still remains.

Appreciate any help.

Offline Tweakie.CNC

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Re: M10Px/M11Px synchronous with motion
« Reply #1 on: June 12, 2018, 06:17:08 AM »
Can you attach a copy of your Gcode which exhibits the problem.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: M10Px/M11Px synchronous with motion
« Reply #2 on: June 12, 2018, 07:53:07 AM »
Done

Offline Tweakie.CNC

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Re: M10Px/M11Px synchronous with motion
« Reply #3 on: June 12, 2018, 08:22:33 AM »
Hi Tim,

I think it is the M3 / M5 commands that are causing the problem. Just use M3 at the start and M5 at the end of the Gcode and see if this resolves the issue.

Tweakie.

(I have replied to you PM).
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: M10Px/M11Px synchronous with motion
« Reply #4 on: June 13, 2018, 06:05:01 AM »
Update:

Tweakie suggested I check in Config / Ports & Pins / Spindle Setup to change all Spin UP and Spin DOWN delays to zero. I did this, ran a cut again, and there was still the problem of deceleration at the M10P5/M11P5 commands.

Another observation: when running with the THC disabled, using the SAME g-code, I saw that there was no deceleration from Mach3. I believe its because those Output signals are not being sent to the controller. As soon as they are, Mach3 decelerates at those commands, not issuing them synchronously with motion, which it should do.

Anyone else had a similar problem or have advice?