I've finally completed the build of the Ordbot, however I've come across a number of issues, some of them being firmware and mechanical.
1. I uploaded the Marlin Firmware to the RAMPS 1.4 w/Taurino power. I also followed the instructions posted in this video (
http://www.youtube.com/watch?v=hZgkR3ztAdw ) and inserted the modified code under the Configuration.H / Pins.H tab in arduiono @12:34 . After inserting the modified lines in the Marlin.pde I verified and can confirm that there were no errors before I uploaded/flashed the board.
2. I booted up the machine to home the axis using the SMART LCD control panel - X and Y axis worked fine but both the Z-axis began grinding and making terrible sounds. I ensured that the threaded rods were same height coming out the top of the X-axis carriage assembly and the z-axis couplers and tightly locked onto the bottom of the rods. I even oiled the rods a little. In some rare cases, during the Z-axis grinding I can manually turn the rods synchronously with my hands and then it will kick into smooth motion, I did this before I flash the board and after flashing the board I cannot even give it a boost manually. The Z-axis even acted up before I loaded the firmware, but now they are more problematic. Are they not getting enough juice? I read that I could bump up the voltage on the stepper driver using the trimpot on the chip? Also, would applying blue Loctite to the bottom of the rods help the grip?
3. Heated bed - only around 55% of the heated bed heats up half of it will get hot the other half does not heat?
4. I mounted a Printrbot Ubis ceramic hot-end to the SeeMeCNC extruder driver - I have it properly connected to the board but it will not heat up at all. The thermistor works, however the heater is not getting hot.
As an attempt to resolve the heating issues I bumped up the voltage on my PSU by turning the tripot all the way clock-wise till stop, then back about a 1/8th turn to get to 12.5 to 13v but to no avail, I'm still having heating issues.
One last note is that my wiring is a little messy in the back, I don't know if any subtleties from the wiring could effect the operation of the machine.
I've yet to drive the printer using Repetier host which I will try today.