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Bed leveling fails with BL Touch clone

Posted by mcdanyel 
Bed leveling fails with BL Touch clone
November 02, 2019 05:22PM
I have an MPCNC build running as a dedicated, large format 3D printer.

For 3 days, I have been fiddling with Marlin trying to get the MPCNC configured correctly and to complete 1 automatic bed leveling. I have been through every forum it seems like and tried every variation, but none of them have worked. I have started over 3 times now with a clean copy of Marlin each time. So far the errors I have had included:
• Z probe past bed
• probe fails
• and currently - no error code, the z stepper just tries to keep lowering the z-axis through the glass bed

Can someone show me what is wrong in my config file? I have tried to follow various bed leveling instructions, but I am now at a complete loss...

MPCNC build
MK8 extruder w/ 0.8mm nozzle
Ramps 1.4
BL Touch clone
Marlin 2.0 (config uploaded below)
Attachments:
open | download - Configuration.h.zip (26.7 KB)
open | download - IMG_7747.jpg (662.1 KB)
Re: Bed leveling fails with BL Touch clone
November 02, 2019 09:19PM
I would try by disabling Leveling Fade Height
//#define ENABLE_LEVELING_FADE_HEIGHT


Computer Programmer / Electronics Technician
Re: Bed leveling fails with BL Touch clone
November 03, 2019 03:28PM
Thanks. Commented that out in my config that I had uploaded, but it didn't affect the printer's behavior at all.

Currently, when I do a G28 from the serial monitor in the Arduino IDE this is what happens:
1). Printer homes the X axis.
2). Printer homes the Y axis.
3). Printer processes forever
4). Print head zooms to the center of the bed to home the Z axis
5). Lifts print head slightly and deploys the BL Touch probe
6). Buries the print head into the printer bed ignoring the BL Touch
7). I press the printer KILL button to reset

At one point I had the BL Touch probe working on a G28, but it still would only work at the center of the bed. I broke things trying to get it to home the Z elsewhere. Started over clean but the above is still what I am getting.
Re: Bed leveling fails with BL Touch clone
November 03, 2019 08:29PM
Post information of how you have the BL Touch wired.


Computer Programmer / Electronics Technician
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