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Author Topic: squaring slaved axis without limit switch  (Read 2455 times)

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squaring slaved axis without limit switch
« on: December 29, 2015, 02:02:39 PM »
I have  stepper drives with belt drive reduced 4-1 . when drive take off start the same but seem to fight each other one going faster then the other then changing sides. you can watch it do it. Belts are tight pullys are the same size as well as the motors. Changed cables no difference. has to be in a setting in mach. Motor tuned the same.

Thanks Randy

Offline Davek0974

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Re: squaring slaved axis without limit switch
« Reply #1 on: December 29, 2015, 02:40:06 PM »
Are you 100% certain both motors are tuned exactly the same - speed, acceleration and steps per???

If yes it sounds like one side is losing steps.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives.
Plasma table, Mach3 V062, Step motors, C&CNC THC.
Re: squaring slaved axis without limit switch
« Reply #2 on: December 29, 2015, 02:53:16 PM »
Yes tried different setting  thought was loosing steps. didn't change . Change up down every setting I could think of save each made sure there identical .Thans Randy

Offline Davek0974

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Re: squaring slaved axis without limit switch
« Reply #3 on: December 29, 2015, 03:03:08 PM »
Are both drives programmed exactly the same on the dip-switches, assuming they have them??

Are both motors identical?
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives.
Plasma table, Mach3 V062, Step motors, C&CNC THC.
Re: squaring slaved axis without limit switch
« Reply #4 on: December 29, 2015, 03:05:33 PM »
both motors are identical and using g540 no dip switch

Offline Davek0974

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Re: squaring slaved axis without limit switch
« Reply #5 on: December 29, 2015, 03:10:45 PM »
Then failing it being a mechanical issue, to rule that out pull the motors of and make sure the axis slides freely on its own, i cant really offer much more up here, hopefully someone will chime in.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives.
Plasma table, Mach3 V062, Step motors, C&CNC THC.
Re: squaring slaved axis without limit switch
« Reply #6 on: December 29, 2015, 04:37:39 PM »
What is the construction of the machine and is it square with all drive removed?
If drive tension is required to pull the machine into square the issue could be mechanical bind which will tend to alternate from side to side.

Offline BR549

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Re: squaring slaved axis without limit switch
« Reply #7 on: December 29, 2015, 07:56:48 PM »
FIRST question what controller are you using ?? LPT version or other ??

(;-) TP
Re: squaring slaved axis without limit switch
« Reply #8 on: December 29, 2015, 08:10:17 PM »
G540 with lpt
Re: squaring slaved axis without limit switch
« Reply #9 on: December 29, 2015, 08:12:56 PM »
The drive seam to race each other for the lead. I have a x axis setup that works fine just the slaved y . each side fight for the lead. The gantry was Squared when started but each motor is pulling it out of square but will change from side to side . Flipping the cables had no effect