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MNieddu91 / Marlin-AI3M-BLTouch

Marlin firmware optimized for the Anycubic i3 Mega 3D printer
GNU General Public License v3.0
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Problem with homing X axis when extruder has print temperature #23

Open ozmmik opened 4 years ago

ozmmik commented 4 years ago

Hi Guys, I have a problem with the homing X-axis when extruder has a print temperature. I fighting with this quite long time and really I'm fed up. I made a video to show you the problem: https://youtu.be/P-bUGd2AIxU

BLTouch works fine. 21:27:07.350 : M48 Z-Probe Repeatability Test 21:27:29.108 : 1 of 4: z: -0.020 21:27:37.882 : 2 of 4: z: -0.020 21:27:46.900 : 3 of 4: z: -0.023 21:27:56.021 : 4 of 4: z: -0.020 21:27:56.021 : Finished! 21:27:56.022 : Mean: -0.020625 Min: -0.023 Max: -0.020 Range: 0.002 21:27:56.022 : Standard Deviation: 0.001083 21:27:56.027 : X:105.00 Y:147.00 Z:11.66 E:0.00 Count X:8400 Y:11760 Z:4644

21:26:16.007 : Bilinear Leveling Grid: 21:26:16.008 : 0 1 2 3 4 21:26:16.008 : 0 -0.095 -0.070 -0.020 +0.005 +0.105 21:26:16.008 : 1 -0.098 -0.063 -0.025 -0.003 +0.070 21:26:16.008 : 2 -0.123 -0.045 -0.043 -0.010 +0.070 21:26:16.008 : 3 -0.125 -0.065 -0.030 -0.013 +0.050 21:26:16.009 : 4 -0.130 -0.088 -0.048 -0.010 +0.050 21:26:16.009 : echo:Bed Leveling On 21:26:16.009 : echo:Fade Height Off

The problem is when extruder has more, less print temperature, then X homing doesn't work. The printer is setting X 0 where actually is. When I turn off heating homing works. Also When I disconnected the probe wires.

I was trying with different Merlin versions and the problem is the same. I think it can be something wrong with the hardware, BLTouch?

Livenai commented 2 years ago

Hii! Experimenting exactly the same problem. Perhaps something related to the 3D printer hardware? I dont know. Ill try to adapt the very start GCode to first heat up the bed, use the BLTouch and then heat up the extruder; or ill just use the BLTouch first and then ill disconnet it before print.