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Author Topic: Noisy Steppers when stationary  (Read 2448 times)

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Noisy Steppers when stationary
« on: August 15, 2011, 04:36:30 AM »
Just got my little router put together and it works really well, but the steppers are very noisy when stationary :-\. There are no issues with torque, accuracy, speed, or temperature, they really work well, but if there is a way to quiet them down I would be even happier ;D.
Can any one help?

Offline RICH

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Re: Noisy Steppers when stationary
« Reply #1 on: August 15, 2011, 05:33:53 AM »
Tony,
Post info on your drives and how the steppers  are wired.
Are you using current reduction when they are stationary?
RICH
Re: Noisy Steppers when stationary
« Reply #2 on: August 15, 2011, 05:41:55 AM »
Ok, I will have to do that tonight, as I am at the office now.

Offline RICH

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Re: Noisy Steppers when stationary
« Reply #3 on: August 15, 2011, 06:02:37 AM »
What i am guessing is that you have a switch on the driver for current reduction and when the motors are stationary it reduces the current to the motor.
The motor then dosen't have adequate  holding torque ie; it sort of just sits there trying  to maintain postion  and thus oscilates.
Said a different way the electrical field is not strong enough to hold the rotor in one position relative to the winding.

Could be wrong but that is the only time I experienced some noise coming from a stepper sitting idle.

RICH
Re: Noisy Steppers when stationary
« Reply #4 on: August 15, 2011, 08:12:21 AM »
Makes perfect sence, thanks, I will let you know if you are right.
Re: Noisy Steppers when stationary
« Reply #5 on: August 17, 2011, 03:09:12 AM »
Thanks Rich you were spot on, all is now good.