7111
General Mach Discussion / Re: Steppers and mach out of sync
« on: April 18, 2011, 03:53:03 AM »
Hmmm, sounds about right then for motor current. I will give this matter some more thought.
The driver board is not the best but it is not bad either so should work OK. There is an issue with some opto isolators requiring the full 5 volt TTL levels and PC parallel ports only outputting the 3.3 volt TTL logic signal. If you can, it may be worth checking your LPT port to see if the direction signal pins swing approx 0 to 5 volts when jogging an axis or if they only make 3.3 volts.
Tweakie.
The driver board is not the best but it is not bad either so should work OK. There is an issue with some opto isolators requiring the full 5 volt TTL levels and PC parallel ports only outputting the 3.3 volt TTL logic signal. If you can, it may be worth checking your LPT port to see if the direction signal pins swing approx 0 to 5 volts when jogging an axis or if they only make 3.3 volts.
Tweakie.