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???
11/12/08 17:13
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#159984 - Powering coils
Responding to: ???'s previous message
Do you shut off power to the coils after the motor has stopped moving? You should bring all the motor coils to ground at both ends (and centertap if you have 6 leads instead of 4). This will still brake the motor but won't consume power.

If you just leave the coils on in the last position you are consuming power to brake the motor, or hold it in position. If you ground the coils the stepper becomes a generator...effectively a brake. Don't just shut off power as that leaves the coils open, no braking.

List of 18 messages in thread
TopicAuthorDate
Stepper Motor getting hot!?            01/01/70 00:00      
   Yes....            01/01/70 00:00      
   Powering coils            01/01/70 00:00      
      circuit            01/01/70 00:00      
         IF and only IF the motor has enough static holding torque            01/01/70 00:00      
            I'm a donkey!            01/01/70 00:00      
               ERRR            01/01/70 00:00      
      ULN Ganging?            01/01/70 00:00      
         only one will pull            01/01/70 00:00      
   ULN power and dual coil powering            01/01/70 00:00      
      What does the Data Sheet say?            01/01/70 00:00      
      There's help available            01/01/70 00:00      
         did you read my earlier post?            01/01/70 00:00      
   Strange steps            01/01/70 00:00      
      Jones discusses this very motor            01/01/70 00:00      
   consider this...            01/01/70 00:00      
   Can a stepper motor make different step sizes?            01/01/70 00:00      
      take a close look at this website!            01/01/70 00:00      

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