i have noticed a discrepancy in my z cut depth…
before i go on, i have a freshly skimmed wasteboard, run my calibration routines, adjusted stepper values, checked pulley set screws etc… literally all the SOP’s.
what’s odd is how the machine is responding to Stepper calibration.
for reference, i cut an assortment of small shapes, lines, etc at a .740 DOC.
first try landed them at .754…
using the online calculator that’s been posted here, adjusted the stepper values accordingly and ran it again.
second time it went .711"… so i went back and forth thru this routine for about an hour.
i finally just started spitballing values and was able to get .738" which is close enough for 99% of what i do.
then, on an actually cut project i noticed that one or two of the pockets had inconsistent cut depths within one pocket. like, the middle 30% of the pocket cut thru cleanly, whereas the outer 70% was up to .010 left.
no ragged, feathered edges, just cleanly cut in some places and remaining material in other places.
would a damaged delrin nut be a possible cause? i’ve checked and verified everything else i can look at without breaking down the machine. I’ve been pushing the machine pretty hard in the last couple months, and it has had its share of major operator errors over the last couple years.
I’ve looked on the Inventables store, and it looks like the nut is available in a set with the leadscrew, but not seperately…
just curious as to what the experts think?