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knutwurst / Marlin-2-0-x-Anycubic-i3-MEGA-S

Marlin 2.0.x Version for Anycubic i3 MEGA M/S/P/X/CHIRON and 4MAX with Anycubic TFT or the "new" DGUS Clone TFT - Now also with BLTouch!
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[BUG] Z AXIS endstop fail #558

Open KlucVYET opened 3 days ago

KlucVYET commented 3 days ago

I have an intermittent endstop problem when starting printing. The first detection by the Z axis switch goes well and when it straightens it sinks into the bed. I updated to 1.5.4 seeing this bugfix (Fix ignored z endstop when only one endstop is used) but it doesn't seem to have worked for me. The solution I found is to do a power reset between each print.

Here is my printer information:

markecskace commented 1 day ago

I have the same problem with I3 Mega S connected to OctoPrint on my Windows PC and MEGA_S_TMC_BLT_10_v1.5 fw. I must disconnect the USB connection between print jobs, otherwise it also sinks into the bed after the initial endstop trigger. Likewise, I also use both endstop switches for Z axis and original BLTouch with TMC 2209.

TripitakaBC commented 1 day ago

This may be completely unrelated; correlation does not equal causation, however...

I changed my Start G-code from what I had to the code listed on this site and when I did, I also had the issue that the nozzle would home OK and then promptly sink into the bed and drag. When I investigated, the line G1 Z0.15 was what was triggering that action so I removed it.

To be transparent, I was also working on a bunch of other stuff at the same time and had forgotten that I needed to re-evaluate the Z offset after changing the hotend. PEBKAC in full effect.

You may want to isolate which command in g-code is causing the unwanted behaviour. I am on 1.5.4 with a Mega S and BLTouch but I have the original stepper drivers (until next week).