how to connect the sync lines

hi,
I am wondering how to connect the sync lines of the stepper-boards (I am using v1.1). there should be some information in the wiki, but I don't find it

I tried to connect the same pin of each board, but then the window of the stepper exerciser doesn't pop up. only when I disconnect them.

x,y and z are working without the sync connected. but when I try the "Line Test" then only one axis is moving, so I think I have to connect the sync-lines, but how?

andreas

Andreas,

I have just been looking at the PIC firmware.
The only sync line that is currently used is connected to pin 18 (RA1) of the processor. All of the RA1 sync lines should be wired together. Each board should have a 47K pullup resistor (R11) for RA1 and R10 for RA3 (pin 2 of the processor) though the latter does not appear to be used. It sounds like something is grounding your sync lines. The way sync is supposed to work is that all the boards read the line as an input. If it is high they are free to move their respective motor. If however a diagonal (X,Y just to keep it simple) is required then the first motor required to move uses sync as an output and drives it low all other motors now wait until sync is allowed to go high.

Best,

Dan

Edited 1 time(s). Last edit at 09/12/2007 07:24PM by Dan Putman.

hi dan,

thank you very much for the infos. I will try it again and if necessary search for the grounding.

best
andreas