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#1
 
06-07-2008, 11:51 AM
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are PWM motor amplifiers good for cnc machines? Many of you buid simple h-bridge circuit for driveing dc brush motors. How it is with motor power at low speeds 1-100rpm and torque? Has it got power and torque or it can be stopped easily with hand?  |
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#2
06-07-2008, 05:16 PM
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| They work fine so long as the control loop is tuned correctly, I am setting up servo's with DIY drivers (Elm Chan and DSPIC) and I am surprised at the power, at hold (dead stop) I can't move the shaft by hand, motors are fairly small, 24V probably about 150W (no specs with motors - old second hand ones  )You will need to tune the drivers though, they were a little "spongy" to start with, now they are very responsive. Russell. |
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pwm dc motor drivers- h-bridge 
Linear Mode
