Messages

41

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 22, 2010, 09:15:21 AM »

Two observations:
First, I am not a computer programmer, BUT George it would appear that activating the ALT-CTRL-DEL sequence WILL be putting more stress on the CPU, thus affecting the outcome...
(this nearly verges on the esoteric topic of quantum states...  if you watch it, you change it...)
Second, it's also really obvious I'm not skilled at understanding g-codes...
Hood, I appreciate your line by line analysis...
I believe your conclusion is that the router is simply obeying its commands.
So, I think I may simply take individual lines and bracket them with parenthesis to turn them off and study the results.
I think Wikipedia's g-code explanation may become my leisure reading....

42

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 21, 2010, 07:57:55 PM »

Okay, Hood, if I understand you correctly, the software is causing the move...
So do I simply eliminate all such lines to stop the drift????
(would I eliminate just the z0.1 line or both the G00 and Z0.1???)
I'm on a steep learning curve here...
I'm not the author of the code, it was generated by Acme Profiler...
It appears I'll have to tweak the code after Profiler generates it...
Yes???????????
Thanks, Hood, for all your effort on my behalf....

43

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 21, 2010, 06:23:00 PM »

Okay, Hood, I've attached a test code when Z-axis drift occurs...
If you start counting with the top line as 0 in the attachment,
the problem occurs on line 29.

Here's a snippet of the code:
26  X0.1657  Y0.626  Z-0.25
27  X0.0823  Y0.626  Z 0.0
28  G00  Z0.1 
29  X9.9157  Y1.376  Z0.0 (THIS IS THE LINE THE Z-AXIS DRIFTS ON)
30  X9.9157  Y1.376  Z-0.25

The drift also occurs if you use Set Next Line to an earlier execution like line 26...
The Z-axis will drift while moving to the line 26 start point...

I look forward to your analysis...
Chet

44

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 20, 2010, 01:30:52 PM »

Hood, thanks for the offer...
If you can work with a string with the problem action, I'll try to isolate a couple of hundred lines...
Give me a day or two...
I really appreciate your effort to help me find a resolution...
Chet

45

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 20, 2010, 09:48:30 AM »

One more observation...
The Z-axis is stable during the duration of a Depth of Cut...
It is only drifting during the duration of a Height of Clearance...
Both are arbitrary commands set by the programming code.
Why would one be stable and the other unstable?

46

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 19, 2010, 08:01:29 PM »

It's a kind offer, Hood, but it's 56,000 lines of code.
I'll hold off on sending the file for now.
Let's see if someone else is having the same problem...
I'm sure I read about this a year or so ago when I was just getting familiar with Mach3...

47

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 19, 2010, 07:28:00 PM »

Okay, I got lucky...
I have a program running and it allowed me to see the drift in action...
The Z-axis readouts show the drift with changing numbers, but the programming code does NOT call for any change.
I look forward to your analysis...

48

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 19, 2010, 07:23:53 PM »

Yes! I was surprised to see it, but the Z-axis numbers change on the readout... even thought they are not supposed to...
But, I am embarrassed to admit, I forgot to notice whether the program is actually calling for that change...  Rats!
I'm using Acme Profiler to generate the code, but it theoretically shouldn't be generated the shift...

49

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 19, 2010, 06:10:41 PM »

Angel Tech, thank you!
BUT they're already in place!
Remember I'm only getting the drift when the Z-axis is on it's way to the next location.
No drift with shuttle, or at specified depth...
Seems to me I remember something, way back when, about the settings of the limit switches in Mach3 that could affect Z-axis drift...
Chet

50

General Mach Discussion / Re: Z axis drift during X-axis motion...

« on: November 19, 2010, 02:53:28 PM »

No, no error messages.
But I did make another observation... The Z-axis is stable during the duration of a cut, it only drifts when it is on it's way to the next cut. It's almost like it's easing in....