I did some research and here are the answers I cam up with to my questions. I'm somewhat confident in them, but please let me know if you notice any mistakes.
- i'm just leaving the home pin unconnected. i dont need it.
- i'm connecting all the sync lines together. i found a circuit someone had made for a 3 axis machine (which is what I want this for...) and he had them all connected.
- i added a 10k resistor inline with it to Vcc.
- i'm going to use a 1k pot. hopefully this is the right value.
- added a 10k ohm resistor in series to Vcc.
- i sure would love it if someone looked over my design... i'm going to upload version 2, you can download it here:
you can download it here: http://www.osotite.com/stepper-shield-v2.sch
there are a few things i still need to do:
- add molex power connector for 12v in.
- add 7805 power circuit to create Vcc
- add analog header so one can use the unused analog arduino pins (0-6)
any other suggestions of things to add to this board? input is welcome.
okay, well i've put the finishing touches on the board and put it into subversion. you can check it out here: The RepRap Project download | SourceForge.net
i'm not a newbie, but i'm also definitely not a pro. i'd love to get some feedback on this circuit before i blow $100 to order boards and build it. even a 'yeah, that looks right' would be nice. thanks arduino crew. =)