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Messages - jofriedl

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1
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 28, 2016, 02:30:57 AM »
It definitely has lots of very short lines and arcs and contours. Shouldn't mach be able to handle that with look ahead and constant velocity?

2
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 27, 2016, 11:53:19 PM »
well I heard back from CS labs. They said the difference in voltage shouldnt be an issue. The also suggested I change some parameters to help with servo tuning. While the servos ended up with a better tune when I was done, I have exactly the same issue. Essentially, When running a program, I end up with a following error 10 TIMES the amount of error I get when jogging back and forth at full speed.

I'm wondering If I should take the plunge and set the machine to run in mach4. I need thing thing to be able to haul ass and cut molds and I just don't see it ever performing close to what it did before I installed mach3. I'm submitted a service ticket to machsupport weeks ago and never heard back from them. I even emailed Brian directly but haven't heard back. I suppose he's busy.


3
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 22, 2016, 05:37:24 PM »
hahaha I just did the same thing.

4
oops! I didn't realize I was posting in someone else's thread! Sorry about that.

5
I did configure the machine that way. Didn't make much of a difference though. So you're pretty confident its a servo tuning issue?

6
One more thing thats worth mentioning is that when I turn my feedrate overide up, the machine gets even more jerky. like a lot more.

7
Well, I've left the drive motor as it came configured from the factory. But, the drive was meant to handle +-12V rathen than the IPA's +-10v, so I think you might be right. I the event that I can't get the tune right with stock drives my other option is a drive from advance motion control.

8
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 22, 2016, 03:59:56 PM »
Here are the potentiometers I was referring to.

Thats an interesting theory about the mismatch of velocity.


9
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 22, 2016, 03:52:24 PM »
Thanks, Hood.

There are three potentiometers on the front of the drives. Yaskawa doesn't have much info on them and the company that repairs them said they leave them alone in all circumstances. I'll attach a picture for clarification.

10
CS-Lab / Re: Jerky movements in complex toolpaths.
« on: July 22, 2016, 11:46:04 AM »
I just inadvertently discovered something.

After lowering my max acceleration by almost 30%, I saw an increase in the cycle time of my 13:25 program by 6 second. The program has lots of short lines in the parallel stepover portion of the program, so I would expect a more significant increase. This leads me to believe the machine can only accelerate at a little over half of what it could do when it came from the factory, regardless of what I have the acceleration set to in the mach configurations.


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