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18-11-2018 #1
Hi there,
An interesting issue appeared yesterday on my new build gantry router cnc. Its been running fine for a few weeks however yesterday as I was running gcode the machine would momentarily halt on random passes and then resume with the what appeared no loss of steps? It was happening in every type of process, I noticed it being worse however when the machine was under heaver load going through solid hardwood. I’ve never seem this before and wondered where I should start to look for the cause. It was like the machine was waiting to catch up with itself or self diagnose, not good though. I’ve got mach 3 set to a kernel speed 35.000Hz. I ran the mach3 driver test and it said it was in excellent health, no spikes.
Any ideas about where to start first to diagnose?
Thanks
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18-11-2018 #2
Open Windows Task Manager and monitor CPU usage while it's running.
See if the CPU usage spikes when the machine hesitates.Gerry
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18-11-2018 #3
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19-11-2018 #4
You hadn't inadvertently enabled exact stop (G61) mode?
And was the G-code code you have run before without problems?Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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19-11-2018 #5
Same G-code which I'd run before without problems. Good thought about the G61, hmm well anythings possible. I'll have a look today.
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21-11-2018 #6
Not had a repeat of the halting Gerry but I have noticed that between running files if I jog away to change tools and re-zero that can generate an error where half way through a 10min roughing job will suddenly make one axis move about 50% outside the job perimeter and continue.
I think this happens specifically on a job where I have to re-zero it more than once on the same job to the same coordinated. Most strange! I've not had cpu usage up and running when this happened but can do incase it identifies anything.
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22-11-2018 #7
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22-11-2018 #8
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