Hi, For some time, I had a strange problem: Whenever I used G29 for mesh leveling, I was getting very similar maps, even though I was making radical changes at the bed leveling screws. I couldn't understand why these changes weren't affecting the height map, then today I have realized something: When I issued a horizontal move command from the panel due, the Z axis also moved. I didn't expect this behaviour. I thought that the corrections created by mesh leveling were only active during printing, but it seems that they are always active after you create a height map. This seems counterintuitive for me, as whenever I issue a new mesh leveling macro, the compensation is applied during probing, which results in a facit loop, where there always is the same amount of slope (reflecting the already recorded height map). Shouldn't leveling correction be only active when printing? Is there a command that I can add to config.g to prevent bed leveling being active when not printing? Here is my mesh leveling macro, in case I am doing something wrong (I use BLTouch as the probe): G28 XY; M280 P3 S10 I1; G28 Z; M280 P3 S90 I1; G1 Z5 F80; M280 P3 S10 I1; G29; M280 P3 S90 I1; https://reprap.org/forum/read.php?416,819817,819817#msg-819817 Fri, 11 Sep 2026 12:28:09 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?416,819817,819847#msg-819847 https://reprap.org/forum/read.php?416,819817,819847#msg-819847 JustSumGuy Duet Mon, 23 Apr 2018 14:31:06 -0400 https://reprap.org/forum/read.php?416,819817,819817#msg-819817 https://reprap.org/forum/read.php?416,819817,819817#msg-819817
For some time, I had a strange problem: Whenever I used G29 for mesh leveling, I was getting very similar maps, even though I was making radical changes at the bed leveling screws. I couldn't understand why these changes weren't affecting the height map, then today I have realized something: When I issued a horizontal move command from the panel due, the Z axis also moved. I didn't expect this behaviour. I thought that the corrections created by mesh leveling were only active during printing, but it seems that they are always active after you create a height map. This seems counterintuitive for me, as whenever I issue a new mesh leveling macro, the compensation is applied during probing, which results in a facit loop, where there always is the same amount of slope (reflecting the already recorded height map). Shouldn't leveling correction be only active when printing? Is there a command that I can add to config.g to prevent bed leveling being active when not printing?

Here is my mesh leveling macro, in case I am doing something wrong (I use BLTouch as the probe):

G28 XY;
M280 P3 S10 I1;
G28 Z;
M280 P3 S90 I1;
G1 Z5 F80;
M280 P3 S10 I1;
G29;
M280 P3 S90 I1;]]> drmaestro Duet Mon, 23 Apr 2018 11:48:27 -0400