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Hey everyone ! I was just wondering, I'm using two KP4M2-008 stepper motors for a small robot my son and I are building, I finally got everything to work, including the IRsensor, and put it on the ground. I don't seem to be getting the kind of power( torque) I was hoping for ( Not even close ). Should I be using Servo motors for more torque, or am I doing something wrong. Any advice would be appreciated. I should also note that it's a 12V motor, but am using a 9.6 volt battery pack, I couldn't find a 12 volt battery and charger. I can't see that making that big a difference, Am I wrong ?? Thanks !! Gerald |
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Stepper VS Servo
Started by ●October 25, 2004
Reply by ●October 25, 20042004-10-25
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What does your stepper pattern look like? Are you overlapping the pulses as
you switch from one coil to the next? (half-stepping). This makes a big
difference in the torque you'll get, compared to pulsing one coil, waiting,
then pulsing the next coil etc.
> > From: "new" <> > Date: 2004/10/25 Mon PM 04:39:29 EDT > To: <> > Subject: [BasicX] Stepper VS Servo |
Reply by ●October 26, 20042004-10-26
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Going to half steps helped, but not to the extent that I'd hoped for. I
guess I'm either going to have to try 12 volts, or go to servo motors. I
was hoping someone could tell me if I'd be better off one way or another. (
EG Stay with the steppers, or go to Modified Servos ) Thanks for the suggestion. Gerald ----- Original Message ----- From: To: Sent: Monday, October 25, 2004 6:52 PM Subject: Re: [BasicX] Stepper VS Servo What does your stepper pattern look like? Are you overlapping the pulses as you switch from one coil to the next? (half-stepping). This makes a big difference in the torque you'll get, compared to pulsing one coil, waiting, then pulsing the next coil etc. > > From: "new" <> > Date: 2004/10/25 Mon PM 04:39:29 EDT > To: <> > Subject: [BasicX] Stepper VS Servo ------ Yahoo! Groups Links a.. To |
Reply by ●October 26, 20042004-10-26
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Hi Steppers are notoriously short on power if you just go off their mass compared to dc motors and running them on reduced voltage just makes things a lot worse. Running off 9v you will only be getting about half the 12v torque. Normally steppers are run off higher voltages with dropper resistors or electronic current management. Google for stepper info. Servos are by far your best bet and much easier to drive. If they are driving wheels make sure they can turn continously. Google for Servo Hacks. David |Message: 4 | Date: Mon, 25 Oct 2004 16:39:29 -0400 | From: "new" <> |Subject: Stepper VS Servo |Hey everyone ! | |I was just wondering, I'm using two KP4M2-008 stepper |motors for a |small robot my son and I are building, I finally got |everything to work, |including the IRsensor, and put it on the ground. I |don't seem to be |getting the kind of power( torque) I was hoping for ( |Not even close ). |Should I be using Servo motors for more torque, or am |I doing something |wrong. Any advice would be appreciated. I should also note that it's a 12V motor, but am using a 9.6 volt battery pack, I couldn't find a 12 volt battery and charger. I can't see that making that big a difference, Am I wrong ?? Thanks !! Gerald __________________________________ |
