Weird Z axis movement
I'm having some weird thing happen after installing BL Touch. Every time I start a print it does the G28-G29 just fine. My offset is set correctly, but soon as it starts extruding it makes a momentary grinding sound and then starts really high on the priming lines (like 5mm high or so) then it drops way too close to the bed once the actual print starts where I'm having to keep babystepping the bed lower and lower if I print more then one print before restarting the printer. Here's my start code but does anyone have any ideas what's going on?
M104 S{material_print_temperature_layer_0} ; Set Extruder temperature
M140 S{material_bed_temperature_layer_0} ; Set Heat Bed temperature
G28 ; Home all axes
G29 ; BLTOUCH Mesh Generation
M900 K0.1
M190 S{material_bed_temperature_layer_0} ; Wait for Heat Bed temperature
M109 S{material_print_temperature_layer_0} ; Wait for Extruder temperature
G1 F1800 E-3 ; Retract filament 3 mm to prevent oozing
G92 E0 ; Reset Extruder
G1 Z5.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z5.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
Posted Jan 22, 2022, 9:27 PM UTC
Did you compile the firmware yourself?
Yes its TH3D for the skr mini e3 v2. It was working just fine but now its like the Z is just random and making weird noises
Did you check the z steps are correct for your lead screw? Should be 800 for the newer design
I have an upgraded lead screw which should be 1600 steps but works at 800 for some reason. Thats a totally different issue though lol I asked about that and no one replied so Ive moved on. If I baby step the printer while the skirt is printing then it will finish a print just fine and a 20mm cube prints at exactly 20mm on all axis. It just that I have to constantly adjust my z offset every single print its different and I cant figure out why. M48 gives me a deviation of .001 or .002 so the probe is working fine as well.
Weird.. I’d turn the print off and manually wind your z screw the whole length to see if you can feel any resistance or hopping. If all seems fine, try moving the bed via the LCD and confirming it is moving that amount. I did 50mm + and - at different heights to check this on mine.