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General Mach Discussion / Re: 3.3 volts of parallel port
« on: December 25, 2009, 10:22:43 AM »
Figured out at last.
For everyone that will come across the same problem :
My driver has 2 options, use directional signal (ON), or use the DR as the 2nd pulse (OFF). (via dip switch)
I found 2 datasheets mentioning the above ON-OFF differently!
1st try: ON and laptop. --- The stepper didnt move at all. It made some sounds. The voltage level was tricking the driver.
2nd try: OFF and laptop. --- The stepper moved one way only. I unplugged the DR signal and hardwired it to 5volts and ground. I now know why it didnt worked; that was because OFF means pulse trigged. The transition was missing.
3rd try: ON with desktop pc. --- ON is the correct and means DR as direction level signal. Combined with a pci parallel port, it works
4th try: ON with laptop. --- -//- ... it works again wtf ?
These are the "grouped" tries. In between i added to the bread board some NPN transitors ti make it work, but the results were the same
Hope this information helps.
For everyone that will come across the same problem :
My driver has 2 options, use directional signal (ON), or use the DR as the 2nd pulse (OFF). (via dip switch)
I found 2 datasheets mentioning the above ON-OFF differently!
1st try: ON and laptop. --- The stepper didnt move at all. It made some sounds. The voltage level was tricking the driver.
2nd try: OFF and laptop. --- The stepper moved one way only. I unplugged the DR signal and hardwired it to 5volts and ground. I now know why it didnt worked; that was because OFF means pulse trigged. The transition was missing.
3rd try: ON with desktop pc. --- ON is the correct and means DR as direction level signal. Combined with a pci parallel port, it works
4th try: ON with laptop. --- -//- ... it works again wtf ?
These are the "grouped" tries. In between i added to the bread board some NPN transitors ti make it work, but the results were the same
Hope this information helps.