Hi–last year I purchased a well-upgraded and lightly-used machine from someone who was moving. He was extremely generous and gave me so many attachments and spare parts and materials. The upgrades include more powerful steppers.
However… upon my first test cuts (cutting through 5mm ply to make a box) the z depth was obviously way off. At first I thought it was user error, but I’ve done a few tests and found that for every inch of of depth manually jogged results in ~3.25" of actual drop. So, in my attempts to cut 5mm ply it went 16mm… I am now out of 1/16" bits and there were some friction pyrotechnics…
Also, interestingly, I was required to jog in 0.1" increments because 1" movement causes the stepper to bind, and shriek. another red flag.
My machine has the acme rod, and not the M8 threaded rod. I’ve confirmed this in setup repeatedly.
The steppers for x/y/z are all upgraded and all the same make/model. I am very interested in troubleshooting this, because everything else is working like a charm! Bear in mind I’m very much a novice. Thanks!