Layer shift test for Mendel90 / laagschuiftest voor mendel90

thingiverse

In printing another project there was a nasty Y layer shift in Y near the end of the print. Simplified the Gcode to just print 2 circles that should overlap if there is no layer shift: first prints a circle, then prints the problematic part without extrusion, then prints the other circle on top of the firsts one. This is "verschuiftest_schudder.gcode". (Shift-test_shaker.gcode) Might be a usefull test for others. However be aware, it is GCODE for MENDEL90. At the end, it homes Z. Mendel90 homes Z upwards, on other printers that home downwards this might be a problem. In that case, modify the G28 command at the end of the file to only home X and Y, not Z. Another way to test for layer shift could be to slice the flat30_35_3 stl with 0 top or botom infill, just honeycomb3d infill for the middle. 1 shell (of more, but only one needed) and see if that gets printed succesfully. This can be sliced for every type of printer. This of course DOES extrude plastic but it is just a small model and if there are problems with honeycomb infill/speeds/jerk/bearings/mechanics, then these should come out in the first layer.