I have a Hictop I3 Prusa, and am having troubles with the printer drifting to the left (negative X) direction. I have attached a picture of what is going on, but the picture shows several different things.
1.) You can see the rectangle that the printer layed down the outer rectangle
2.) Then the second pass a the edge drifted to the left,
3.) Then the very first pass in the xy (cross hatch) direction worked fine,
4.) but the first negative xy crosshatch pass drifted to the negative x direction and then the same thing happened again in the next pass, and then worked for like 3 passes, then happened again.
things I have tried.
1.) Put on a steady base
2.) Slowed the print speed down to a crawl
3.) put liquid wrench on the slide bars
4.) marked the X pulley with a paint pen and ensured that the pulley is not slipping.
5.) Watched to make sure no wires were binding, and it is not hitting anything.
6.) Slid x axis and Y axis to ensure they move smoothly.
Kind of out of ideas about what to try next.
