Hello All!

To the point, here's my problem.

So I was having trouble printing in petg because after the first couple of layers, the nozzle would begin to drag across the print. Suspecting a z movement calibration problem, I rigged up a dial indicator to check. What I found was that any time my z axis changed direction, there would be about .4mm of movement required before the z axis would actually begin moving the right distance. So obviously I have some end play issues in the z axis somewhere. Either in the threaded rod and nut or motor coupler, I'm not sure. But I found that since the printer moves down to print the first layer, then up to print the second, it was getting behind on the second layer and since petg firms up fast and doesn't really re-melt, the error would never self correct. So now i have to baby-sit the printer to step the z up .4mm as it transitions to layer 2.

My question.
Is there any way I can do this with software/firmware? The play is very consistent so manual tweaking shouldn't really be required.