OK, so I have a few salvaged video recorder tape drums.
I'd like to be able to use one in a pov display.
I have vague recollections that the motor in the head is a bldc (this one is), and that it can keep accurate speed and position to track the sync pulses on the tape.
I have one of these on the bench, I sussed out from the controller chip datasheet the powers and grounds, and then with a little trial sussed out which signals are required to make the motor run, but all I can do is get the thing to run flat out.
What is a typical control method for these?, if I ground one of the pins and put a 6kc pwm signal on the other the motor will run and the pwn controls the speed, but you can feel vibration from the motor, reflected by a fluctuating current demand.
I'd like to be able to use one in a pov display.
I have vague recollections that the motor in the head is a bldc (this one is), and that it can keep accurate speed and position to track the sync pulses on the tape.
I have one of these on the bench, I sussed out from the controller chip datasheet the powers and grounds, and then with a little trial sussed out which signals are required to make the motor run, but all I can do is get the thing to run flat out.
What is a typical control method for these?, if I ground one of the pins and put a 6kc pwm signal on the other the motor will run and the pwn controls the speed, but you can feel vibration from the motor, reflected by a fluctuating current demand.