hello
i recently build alan picstep driver
i set it up to 1.6amps and powerd it with 30volts
i used a 1.6amp 2.7volt bipolar stepper.
i didnt use a computer
i just used a small pic 16F628A circuit that generated a pwm frequency to feed the step signal
i tied the enable to ground .
now the problem
the max frequency i can feed to the driver before the motor stall is 18khz. then it stalls ( i tried it up to 20khz) (50% duty cycle)
i tried changing the input voltage (lower it to 12V) but there were no effect on the motor speed at all, just a lower noise from the motor.
the motor speed is not high at all, i estimate it to be about 200rpm or something like that.
am i missing something here ?
i know that the frequency can go much higher than that but the motors stops and make a hissing noise.
i dont know if this is important or not but i replaced the 1uf capacitors on alan circuit with electro caps. ( i dont have any mkt on hand), also replaced the 2.2nf with 2.6nf
i will appicate any help here
thank you