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Author Topic: Motor issues  (Read 3364 times)

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BoatBuilder

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Motor issues
« on: July 22, 2011, 07:31:36 AM »
Hi All,
I am finalising my setup for my new router and am having some issues with my motors randomly stopping whilst jogging from Mach3. If I run any single axis at full speed it works well, but if I run two or more axis at full speed at some point one of the motors will randomly stop and which motor is also random. I am fairly confident that my cabling is ok but you never know which sort of leaves configuration. I realise that this is all a little vague but if there is anything someone might be able to point me to or perhaps test for I would appreciate it.
Cheers
Rod

Offline Hood

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Re: Motor issues
« Reply #1 on: July 22, 2011, 08:29:40 AM »
Can you measure the power supply outpput voltage whilst jogging two axis to see if it is dropping off.
Hood

BoatBuilder

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Re: Motor issues
« Reply #2 on: July 22, 2011, 09:31:28 AM »
G'day Hood - thanks for that. I'll measure the power from end to end. I'll let you know the outcome.
Cheers
Rod

BoatBuilder

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Re: Motor issues
« Reply #3 on: July 25, 2011, 09:10:41 AM »
G'day Hood - I measured the voltage output of the power supplies and it was consistent across alll supplies (4 of them) and drivers (42volts) both at stand still and whilst jogging. I then slowed the motors down in Mach3 and I eventually got success but I think that the speed will be a bit slow once I hook the motors to the table and the motors are certainly capable of much more speed. I am starting to wonder if the drivers might not be big enough to drive the motors at higher speeds. Given that this is my first effort at a CNC machine I am somewhat out of my depth. Is there a way that I can test the driver for suitablity to the motors?

Cheers
Rod

Offline stirling

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Re: Motor issues
« Reply #4 on: July 25, 2011, 09:35:20 AM »
Hi Rod, Can you post any/all info (data sheets if possible) on motors, drivers, specs of power supply plus your xml please.

Cheers

Ian

BoatBuilder

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Re: Motor issues
« Reply #5 on: July 25, 2011, 09:51:00 AM »
G'day Ian - here are the data sheets. The motor is the MOT-130 and the power supplies are the SPS-407's.

Cheers
Rod
« Last Edit: July 25, 2011, 10:03:52 AM by BoatBuilder »

BoatBuilder

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Re: Motor issues
« Reply #6 on: July 25, 2011, 10:07:29 AM »
Here is the XML

Offline stirling

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Re: Motor issues
« Reply #7 on: July 25, 2011, 10:40:20 AM »
Hi Rod

what microstep setting are you using on your drivers? dip sw 5,6,7 and 8
also your driver dynamic current setting? dip sw 1,2 and 3

Cheers

Ian
« Last Edit: July 25, 2011, 11:09:29 AM by stirling »

BoatBuilder

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Re: Motor issues
« Reply #8 on: July 25, 2011, 06:50:33 PM »
Hi Ian,

I have included a photo of the settings on the actual stepper as the switch settings are different to the doco. I have them set to 5.6A and 1600P/R and switch 4 set off which has something to do with half power at stand still.

on,on,on,off,off,off,on,on

Cheers
Rod

BoatBuilder

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Re: Motor issues
« Reply #9 on: July 25, 2011, 07:07:56 PM »
Hi Ian,
I found the doco for the driver on the web. Apart from the switch settings it is the same, I hadn't realised it was different documentation until now. I had gone off the settings on the case.

Cheers
Rod