Internet PLC Forum

General => Technical support => Topic started by: george1 on July 21, 2003, 09:03:53 PM

Title: stepper motor heating up
Post by: george1 on July 21, 2003, 09:03:53 PM

Hi,
   My stepper motor started to heat up as I had power to it.  I was wondering if I did not use high enough resister to reduce the 24 volts down to 5 volts. I used 1.9k and I think you recommended to use 2.2k.  Other than that the stepper motor and plc works fine.
thank you so much john

Title: Re: stepper motor heating up
Post by: george1 on July 22, 2003, 09:11:20 AM

Hi,
  I found out that I have to reduce the current to the stepper and also steppers run hot anyways,

thank you so much
john

Title: Re: stepper motor heating up
Post by: support on July 22, 2003, 12:19:04 PM

If your stepper motor is supposed to run on 5V supply then you should not connect it to 24V. Using a resiser to limit the current is not a good solution.

The 2.2K resistor we recommend is for interfacing to the stepper DRIVER input, not the stepper motor itself. You have to try to understand the differences between the two. The stepper driver may be using 5V for its input interface but the stepper motor itself may be powered by 5V, 9V, 12V, 24V or even 48V and these voltages are normally independent or isolated from the 5V interface input.

Title: Re: stepper motor heating up
Post by: george1 on July 22, 2003, 04:27:11 PM

oh I do apologize for not being clear.  I meant my driver signals operate on 5 volts and my stepper operates on 24 volts.  I have to be more clear next time
thank you so much
john