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kliment / Sprinter

Firmware for RepRap printers and similar devices
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Problems using 3rd party steppers. #216

Closed jpmeyer001 closed 9 years ago

jpmeyer001 commented 10 years ago

I am having a lot of issues using external stepper drivers that require at least a 2μs pulse on the step pin. In addition, my movements are controlled by worm gears so there is a large amount of friction. Is there a #define in the configuration.h file I am missing. Will I have to modify the interrupt functions? Any help would be greatly appreciated. I can post my findings on my project website as well.

midopple commented 10 years ago

Hi, Use the Experimentalversion (also very stable), here is an option in configuration.h

Extended step pulse in microseconds. Minimum High Time for Stepperpulse at 16 Mhz (E-Axis) is 2,4 us Minimum High Time for Stepperpulse on X = 6,7 us / Y = 5,6 us / Z = 3,6 us if you want Stepperpulse like 8 us set the value to 6

define EXTEND_STEP_PULSE_USEC 0

jpmeyer001 commented 10 years ago

Thanks a bunch, I really appreciate it. Is there a way to force a square wave output even during acceleration and deceleration? It seems my (very old) stepper drivers requires this to function smoothly.

midopple commented 10 years ago

Hi,

This ist not so easy, the stepper pulse is generated in the Interrupt and the interrupt should not wait to long. So if you wont a squarewave the pulse had to generate with the toggle pin funktion so every step the output change the state. But this is more programming work.