I have recently built my first 3D printer based on Prusa i3 model. I am having problems with printing through pronterface. I am able to move all the axes precisely in pronterface, also the temperature and extrusion are fine, but when it comes to printing, most of the time it takes a lot of time to initiate printing. Also after printing for some time, it randomly moves to some new coordinate and resumes the printing. I have reuploaded the sprinter firmware many times, also I changed the computer ( I have used both windows 7 64 bit as well as windows vista 32 bit) but the problem remains. Please help me in this regard as it is frustrating after so many days of hard work.
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