Quote:
Originally Posted by rcheshire
Not sure if this is the type of info you need. You will need a board to generate the stepping pulse and forward/reverse logic, such as a microprocessor or 555 timer. These signals are sent to a driver board (such as an eady driver) which provides the correct voltage and energises the coils sequentially. The step and direction inputs are marked on the board - hook these up to the logic outputs.
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Maybe I'm reading this controller spec wrong, but it seems to me it has one mode which generates the pulse and drives the motor. It does have a 4Mhz crystal on board, why would it have that if not to generate the pulse? It also seems to have a mode where you can use an external pulse. I found a more detailed spec sheet,
http://www.kc-kwan.com/supports/menu...troller_01.jpg. Biggest issue is if it can generate the correct speed. Price is around $16, so not much out of pocket if it does not work.
I still might go with Gary's original design, using a gearmotor driven through an LM317 regulator. The regulator will compensate for minor variations in input voltage and should provide good output voltage regulation as long as input/output voltage ratio is high enough. There will of course be variations due to temperature. I'll have to see how that goes. I don't particularly want to fiddle with Arduino or microprocessors. Unless the pulse is generated by a crystal, I doubt if would be any more accurate than the regulated motor method, especially as the motor is geared down from a higher rpm. I might be missing some basics here, I haven't fiddled with electronics at this level for a long time.