Check your e-steps, I had same problem when I went to a Micro Swiss hot end.
Sometimes they get changed, ghost in the machine.
think i have it figgured out the e step was at the factury 93/mm turned it up and i now have it turned to 243.3 and it actually is moving 100/mm
That’s awesome, thanks for letting us know, I will mark your fix as a solution.
How are you making out with your upgrades and repairs, It Looks like you are doing a few.
so far between my school and other things i consider higher importance than the printer i have not been doing much with it recently

