I am relatively new to this, I bought an ultimaker original that was a few years old from somebody and put the newest version of the electronics in (1.5.7), I also upgraded the extruder and hotend. It prints small objects perfectly every time, but when I tried to print a larger object every layer from the start of the print to the end slides down the y axis (about .5mm) each layer. I have tightened the drive belts, lubricated all of the shafts, and tightened all of the set screws, reinstalled the firmware. I don't understand what else it could be and it doesn't make sense to me that its only on prints that take up a large portion of the bed. Any advise would be greatly appreciated.
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Daid 306
It's called "layer shifting" and while right now you have it on the first few layers, it could happen on any layer. What you should check is:
* Does the Y motor have enough power
* Are your pulleys firmly attached to the rods
* Are both your long AND short belts tight
It could also be that your start height is too low, and that the head moves into the first layers during the print of the next layer, but this usually also results in other problems.
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