Quote:
Originally posted by Starkler
I think the wood working is the easy bit. You also need to fabricate metal bits for the drive and gearing, not to mention the electronics for controlling the stepper motor.
|
Yep,
The gearing for the motor is a bit of a worry but there are plenty of small motors with gears available from places like Dick Smith with the final speed known. That was the hard part using the motor I did, it was all experimental as the speed was unknown. As for the controls, if you have it in the right ball park with a standard DC motor just varying the current will vary the speed enough for you to get the tracking right. Unfortunately, as the batteries run down so does the speed so you have to do a bit of fiddling there.
That is where a stepper motor comes in. There is a lot of info on their control in the sites I have attached so if you are electronically inclined or want accurate tracking they are the way to go. That is why I am looking at the RA controllers to see if any are useful for what I am trying to do.
Cheers