Finished wiring up my mechanical endstops. This should complete all the electronic bits for my repstrap. I've got the main firmware on an Arduino Mega, 5 steppers connected to 5 of my pololu carrier boards, two thermistor circuits, and two mosfet circuits. The endstops (min and max) are wired to connect in via the stepper drivers I made up. There are rj45 connectors on those that accept the connections. I've got a big box of cat5 plenum cable, so I wired up my own cables. For the actual mechanical endstop end, I just deadbugged the components to the side of the SPDT switch. I used the following schematic for wiring up the stops. http://code.google.com/p/makerbot/downloads/detail?name=makerbot-mechanical-endstop-1.1-r1.zip
don't have any picture of the setup, but I'll scan in a pic of the cables later. I have to do a whole write up of the process and my design when I'm done.
I've also decided to try to take several paths forward on my extruder. I will be making an extruder to hold my stepper out of mdf that I will mount the hot end to. I will also be headed to my local hackerspace to see if I can get a Wade's extruder printed there on the Darwin they have. I will also be trying to see if I can get a metal frame extruder built in case the MDF one won't work. If I can get the MDF or metal one to work, I'll promptly be printing a wade's and also a brutstruder. Or if neither the MDF or metal extruder are able to be made, I'll be working to get the Darwin printing and print out a wade's at the hackerspace. The hackerspace route may take the longest, since I am only able to make it out there once a week on Monday nights after the kids head to bed. but with these options, I hope to have a functional printer soon. If I can't get any of these things to work, I'll buy a stepper brutstruder from Makergear, but I think I can get things working. I've been trying to build this machine up from bare basics as much as possible to learn everything I can about the reprap/repstrap process. I hope my MDF route works, since it is the easiest and fastest route forward that I can see.