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Author Topic: Mach3 m1076.m1s problem  (Read 5489 times)

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Offline Rimmel

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Mach3 m1076.m1s problem
« on: June 17, 2016, 11:54:51 AM »
Having a problem with the m1076.m1s macro.

If I repeated use the G76 macro in gcode (use G76 the same gcode file over and over) to create a parallel thread, then randomly the thread starts with a tapered thread and then half way though switches back to a parallel thread. It does it in such a way as to damage the tooling though. It seems the tapered setting is being cached somewhere????

I'm using Mach3 062.

Question for a mach3 dev or similar:-

How can I disable tapered threading completely in the m1076.m1s macro? (do not envisage using tapered threads). E.g hard coding "T0" (taper 0). I am a programmer so I just need to know what to set.

thanks
Rimmel

Offline mc

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Re: Mach3 m1076.m1s problem
« Reply #1 on: June 18, 2016, 05:05:56 PM »
Where did you get the M1076 macro?
I've just checked my Mach3 install, and can't find it.

Also, what motion controller are you using? Parallel port or external motion controller?

Offline Rimmel

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Re: Mach3 m1076.m1s problem
« Reply #2 on: June 19, 2016, 07:56:06 AM »
The m1076.m1s macro is in the Mach3 directory.  E.g.  "C:\mach3\m1076.m1s"


I am using a Uniport motion controller.

Every thing else works perfectly - I am just trying to remove the Taper code from the macro.

thanks for the reply.

Rimmel

Offline Hood

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Re: Mach3 m1076.m1s problem
« Reply #3 on: June 20, 2016, 05:50:34 AM »
I do not think it is anything to do with the taper but more likely just an issue with Mach threading.
If I recall this was a reported issue on several occasions and I am sure Art reckoned it was to do with spindle slowing down during the threading cut and screwing things up, I could be wrong about that however. There was a lot of work done on threading at one point and things were changed significantly, don't recall the exact version things were altered but if you are using an older version of Mach or your m1076 is old then it may be worth updating things, just don't update to ver 066 as it is screwed, especially for Turn.
Hood

Offline Rimmel

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Re: Mach3 m1076.m1s problem
« Reply #4 on: June 20, 2016, 05:55:45 AM »
I am using 062.

Offline Hood

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Re: Mach3 m1076.m1s problem
« Reply #5 on: June 20, 2016, 06:08:17 AM »
Ok should be fine, does your spindle slow down during the threading, especially as you get deeper into the operation?

Hood

Offline Hood

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Re: Mach3 m1076.m1s problem
« Reply #6 on: June 20, 2016, 06:16:14 AM »
Oh and also if you want you can set the m1076 to Test = True and it will output G32 moves, that should show if any tapers are creeping in, I suspect it will not have any.
Hood

Offline Rimmel

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Re: Mach3 m1076.m1s problem
« Reply #7 on: June 20, 2016, 06:17:14 AM »
No, exactly the opposite. It always goes into Taper mode at the start of the operation and then seems to figure out it is supposed to be in parallel mode and then stops and changes to parallel (breaking the threading insert).  I make sure I always have plenty of run into the thread as well. The spindle is quite stable and I'm using an optical spindle reader/sensor.

Like I say though it seems random, probably once every 10 runs (average). Sometimes more, sometimes less.

Offline Hood

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Re: Mach3 m1076.m1s problem
« Reply #8 on: June 20, 2016, 06:34:00 AM »
Ok then likely best way to see is set the test to true and run over and over and see if it screws up.
Hood

Offline Rimmel

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Re: Mach3 m1076.m1s problem
« Reply #9 on: June 20, 2016, 06:39:17 AM »
OK - thanks for the tip. I will try it and see what happens.

Thanks again
Rimmel