I spent over a decade as a machine control technician for a jet engine company (no Honeywell). I don't think there was a single machine that used a stepper motor if positional accuracy was the goal. Most were brushed DC with integral tach and either a rotary encoder or linear encoder (glass slide) with dedicated hardware PID controllers. Just out of curiosity I looked up a Bridgeport verticaby shek - General Mendel Topics
My post was directed to casainho or anyone in general having positional problems. I sure wish my printer was finished so I could do some testing of my own.by shek - General Mendel Topics
If it were me I would try a few experiments to see if you can isolate the behavior to one system. Do they come out the same if you reverse the print (mirror)? Turn the object 90deg? Print in a different part of the print bed? I agree after seeing your final result that there is likely something causing a hysteresis error in the x axis. The way these printers are assembled, it is most likely aby shek - General Mendel Topics
Hello all A huge thanks to all of you who have gone before me and made this device possible in it's current state! I'm hopeful to someday contribute back to the project. I started my build this past week after buying my printed parts off ebay. I've never seen printed parts in person before and I suspect that the parts that I bought were of average quality. Included were some PLA bushings howby shek - General Mendel Topics