Z Axis movement reversed while printing

adrianm1972

I have a strange problem, my z motors do not move the print bed down (Z+) as layers get printed it moves up (Z-). However, the z motors move properly (Z+ away from nozzle, Z-towards nozzle) when I manually move axes, home axes and for bed leveling.

Config files attached. Also attached gcode of test cube print.

My printer is a CoreXY, with BLTouch and all of that is working properly.

tpre0.g tpost0.g tfree0.g stop.g sleep.g retractprobe.g resurrect.g resume.g pause.g homez.g homey.g homex.g homeall.g deployprobe.g config-override.g config.g bed.g Test Cube v2.gcode

SIam

I think you have to look into your slicer. It's look as you have flipped or inverted your z- Axis or you have selected the wrong printer type.

alankilian

@siam The sliced GCODE looked correct to me and in a GCODE simulator.

Phaedrux

Is this a vase mode print?

; layer 3, Z = 0.600
G92 E0.0000
G1 X158.750 Y159.430 Z0.401 E0.0108 F2880
G1 X158.440 Y159.598 Z0.402 E0.0226
G1 X158.148 Y159.706 Z0.403 E0.0329
G1 X157.995 Y159.746 Z0.403 E0.0382
G1 X157.660 Y159.794 Z0.404 E0.0495
G1 X154.151 Y159.795 Z0.413 E0.1662
G1 X140.200 Y159.800 Z0.450 E0.6302
G1 X140.206 Y142.335 Z0.495 E1.2111
G1 X140.250 Y142.027 Z0.496 E1.2214
G1 X140.295 Y141.848 Z0.497 E1.2275
G1 X140.346 Y141.695 Z0.497 E1.2329
G1 X140.475 Y141.412 Z0.498 E1.2432
G1 X140.665 Y141.114 Z0.499 E1.2550
G1 X140.868 Y140.880 Z0.500 E1.2653
G1 X141.001 Y140.756 Z0.500 E1.2713
G1 X141.253 Y140.568 Z0.501 E1.2818
G1 X141.389 Y140.487 Z0.501 E1.2871
G1 X141.691 Y140.347 Z0.502 E1.2981
G1 X142.030 Y140.250 Z0.503 E1.3099
G1 X142.338 Y140.206 Z0.504 E1.3202
G1 X142.504 Y140.200 Z0.504 E1.3257
G1 X159.800 Y140.200 Z0.550 E1.9010
G1 X159.800 Y157.493 Z0.595 E2.4762
G1 X159.776 Y157.833 Z0.596 E2.4875
G1 X159.747 Y157.988 Z0.596 E2.4928
G1 X159.660 Y158.287 Z0.597 E2.5031
G1 X159.515 Y158.608 Z0.598 E2.5149
G1 X159.334 Y158.888 Z0.599 E2.5259
G1 X159.234 Y159.011 Z0.599 E2.5312
G1 X159.013 Y159.231 Z0.600 E2.5415

adrianm1972

@phaedrux Yes, it is but I also tried a standard print and had the same issue.

I suspect that I have some setting inverted somewhere but im stumped because I went through the setup guide and commissioning/testing process in painstaking detail and all z axis movements, bltouch probing, all move normally.

adrianm1972

Well, I found a post here where a guy had a similar problem. It went away when he power cycled his board instead of just resetting it. That fixed my problem too. Very weird but its working fine now.

o_lampe

@adrianm1972 said in Z Axis movement reversed while printing:

just resetting it.

The term reset used in the popup screen of DWC is misleading. When you change something in config.g and the message pops up, it doesn't actually reset the printer, but runs config.g again. Some settings (like M584 drive mapping) stay in memory untouched. ( Don't ask me why?!)