I think I might be having some leveling issues using the BLTouch. It appears as if it's not working. I have Marlin 1.1.8 on a D-Bot CoreXY machine. The reason it caught my attention is that I printed a sacrificial tower off to one corner for a print this evening and it took 2 layers or so before the first layer would lay down on the bed while the center print started at layer 1. I started watching the Z position during the print head moves and it never changes from the center to the corner! When I say that I mean I am watching the LCD and the Z-coords stay the same across the print. It should be changing??? That tells me something isn't right. I am using a BLTouch and have adjusted my z-offset using this video, [www.youtube.com] The z-offset and the bed leveling G29 are done with both the nozzle and bed hot.
Here is my S3D start script,
M280 P0 S160 ; BLTouch alarm release
G4 P100 ; delay for BLTouch
G28 ; home
G29 ; auto bed leveling
G92 E0
G1 Z0.1 F1000
G1 X8.0 F2000
G1 Y280.0 E4.0 F1000.0 ; prime
G1 Y240.0 E8.5 F1000.0 ; prime
G92 E0
When I do the bed leveling here are the z coords it shows
11.31/11.32----11.23/11.23----11.09/11.1----10.99/11.01----11.01
11.25/11.26----11.29/11.29----11.33/11.33----11.06/11.06----11.05/11.05
11.25/11.25----11.14/11.13----11.11/11.11----11.08/11.09----11.1/11.1
11.21/11.21----11.23/11.23----11.07/11.08----11.11/11.1----11.07/11.09
11.12/11.13----11.23/11.23----11.18/11.17----11.16/11.15----11.22/11.21
Upon starting a print the BLTouch does go through a 5x5 grid. EEPROM is active. Suggestions?
Here is my S3D start script,
M280 P0 S160 ; BLTouch alarm release
G4 P100 ; delay for BLTouch
G28 ; home
G29 ; auto bed leveling
G92 E0
G1 Z0.1 F1000
G1 X8.0 F2000
G1 Y280.0 E4.0 F1000.0 ; prime
G1 Y240.0 E8.5 F1000.0 ; prime
G92 E0
When I do the bed leveling here are the z coords it shows
11.31/11.32----11.23/11.23----11.09/11.1----10.99/11.01----11.01
11.25/11.26----11.29/11.29----11.33/11.33----11.06/11.06----11.05/11.05
11.25/11.25----11.14/11.13----11.11/11.11----11.08/11.09----11.1/11.1
11.21/11.21----11.23/11.23----11.07/11.08----11.11/11.1----11.07/11.09
11.12/11.13----11.23/11.23----11.18/11.17----11.16/11.15----11.22/11.21
Upon starting a print the BLTouch does go through a 5x5 grid. EEPROM is active. Suggestions?