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Author Topic: Closed loop steppers = problem?  (Read 10998 times)

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Closed loop steppers = problem?
« on: August 02, 2023, 06:11:00 AM »
Hello,

I am currently using closed loop oriental motors and drivers on my CNC machine. It has been having troubles with accuracy. Recently I checked the distance travelled vs the distance commanded and it was out by 3.15 mm over 240 mm. I used the wizard and recalibrated the counts/unit. Then, it was still out by 3.15 mm over 240 mm (also out by 1.575 mm over 120 mm so I know that it scales.)

Basically, I heard that using closed loop motors can cause similar problems and wondered if anyone has experienced something similar?

Also if I was to disable the encoders, will that cause further problems? EDIT: is it even possible to disable the encoders?

Many thanks,
Dan
« Last Edit: August 02, 2023, 06:12:39 AM by mediumSasuage »
Re: Closed loop steppers = problem?
« Reply #1 on: August 02, 2023, 12:49:06 PM »
Are the motors and/or machine new?  If yes then it should be the supplier's responsibility.  Which wizard did you use, in in-built Mac one?  What is the steps/rev of the motors/encoders?  I very much doubt if the drivers would work without the encoders.  Are they servos or closed loop steppers?

Offline comet

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Re: Closed loop steppers = problem?
« Reply #2 on: August 15, 2023, 09:53:55 AM »
check the steps per rev are not 1024, some are and some are 1000. or 512/500, 256/250