Originally Posted by
LuckyImperial
I doubt it has anything to do with the cost of the printer. We're all about low cost...well, a lot of us haha.
What was the original control board? Just a standard Arduino Mega 2560 with Ramps 1.4? What is the exact model of the sainsmart board you got?
Staying on the topic of the Sainsmart w/ Repetier, what did not work? You could not figure out a firmware configuration that yielded any movements? Z-Probe didn't work?
Do you use Marlin as your stock firmware? What version of the Arduino compiler do you use? 1.0.5 is the only version that can correctly compile a lot of the Marlin firmware versions. Maybe that's the new source of your Extruder motor issues. That, or maybe a motor driver kicked the bucket. Are all your motor pots set to .5v?