jbernardis Wrote:
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> I'm wondering 1) what I could have done wrong, and
> 2) did I damage my motor. According to the
> Lulzbot web site, the motor is rated at 2.8 volts.
> I'm not sure what the adafruit board puts out,
> but I was supplying 12 volts to it. I though I
> heard of people running their steppers at up to 24
> volts, so I thought I'd be safe.
You can do that with latest Allegro chips etc because they are advanced chopper drivers with current control. The L293 are simple old school half-H type drivers, so you need to match supply voltage to motor voltage.
The motor is probably ok, the driver should have smoked before it could pass significant current through it.
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> I'm wondering 1) what I could have done wrong, and
> 2) did I damage my motor. According to the
> Lulzbot web site, the motor is rated at 2.8 volts.
> I'm not sure what the adafruit board puts out,
> but I was supplying 12 volts to it. I though I
> heard of people running their steppers at up to 24
> volts, so I thought I'd be safe.
You can do that with latest Allegro chips etc because they are advanced chopper drivers with current control. The L293 are simple old school half-H type drivers, so you need to match supply voltage to motor voltage.
The motor is probably ok, the driver should have smoked before it could pass significant current through it.