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Messages - wgpeters

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11
Mach4 General Discussion / Re: Mach4/Uc100 problem with jogging
« on: May 09, 2018, 10:39:16 AM »
Well then why does it say it now supports Mach 4.
It does not say it partially supports Mach 4 or that it supports Mach 4 with exceptions.




12
Mach4 General Discussion / Re: Mach4/Uc100 problem with jogging
« on: May 09, 2018, 09:52:46 AM »
https://cnc4pc.com/uc100-usb-motion-controller.html

At top of page, it says it supports Mach4
Near bottom, it says it supports backlash compensation.

It certainly implies that it should work.

13
Mach4 General Discussion / Re: Mach4/Uc100 problem with jogging
« on: May 09, 2018, 09:31:48 AM »
Yes, it is advertised to support backlash compensation.  If it doesn't, I just wasted $300

14
Mach4 General Discussion / Mach4/Uc100 problem with jogging
« on: May 09, 2018, 08:59:53 AM »
My setup is Win10 HP Laptop, Mach4 Hobby, UC100, Vista Pendant,Sherline Lathe, Sherline Nexgen Mill

System does not jog correctly when backlash setting is non-zero in Mach.  This affects all axis.

Backlash adjustment is applied after each jog even though direction has not changed.  Sometimes, the stepper goes the wrong direction, and often the jog amount is wrong.  For instance a .01 jog may go .01, or may go something less.  This happens whether the jog was done from the pc jog button, or the pendant, so I believe the pendant is not the problem.

Smaller jog increments result in more erratic behavior, especially when the jog amount is less than the backlash setting (which in my case is set to .003".

When making successive jogs of .001, the movement is often .001, 0, .002, 0, .002, etc. 
When stepping by multiple gcodes, like g0 z .001, g0 z .002, g0 z .003 ..... the system seems to work correctly as shown by test indicator and visual observation.

UC100 is set to 25khz, but testing with 100khz had the same result.

Backlash should only be applied when changing directions.

System works correctly when driven by LinuxCNC so problem is not stepper malfunctions or the Sherline motor drivers.

Any ideas?





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