Hi all,

I’ve recently bought the Monoprice Maker Select Plus. I’ve already made the Y-carriage swap and switching to glass. However, I keep getting under-extrusion on the bottom layers and the top layers (everything in between those are doing an ok job right now and pretty clean). I decided to try extruder calibration last night with the G-code: G1 E100 F100, and marked my filament for 120mm. Ideally the 20mm should have been left…but I had 80mm left! I only extruded 40mm instead of 100mm. Anyone have any idea what could be the issue other than e-steps being massively off? I don’t know what else to try out. Thanks.