I've just put on Marlin 1.1.0-RC6 and setup the mesh bed leveling. I went through the steps and got the bed all situated and I'm really happy with the results. I'm not sure I understand, however, all the things that will cause Marlin to deactivate mesh bed leveling and then how to get it back short of a reboot or emergency stop command.
I've figured out that as long as I only home via a plain G28 command, everything seems to be fine. But if I have some start G-code that tries to home only a particular axis or axes, then that seems to cause the MBL to get deactivated and if I start a print, it will be printing in the air because it won't go past the end stop to the actual zero position. Doing a G29 at that point will give the "Mesh bed leveling is not active" message.
For example, do a G28 X0 Y0 and boom, MBL is not active any more.
So when that happens, how can I re-activate MBL? I've tried doing a plain G28 after that, but that won't activate it. I usually end up doing a M112 emergency stop to reset the printer, and then I'm back to normal. Is there some other way to just switch it back on again?
I've figured out that as long as I only home via a plain G28 command, everything seems to be fine. But if I have some start G-code that tries to home only a particular axis or axes, then that seems to cause the MBL to get deactivated and if I start a print, it will be printing in the air because it won't go past the end stop to the actual zero position. Doing a G29 at that point will give the "Mesh bed leveling is not active" message.
For example, do a G28 X0 Y0 and boom, MBL is not active any more.
So when that happens, how can I re-activate MBL? I've tried doing a plain G28 after that, but that won't activate it. I usually end up doing a M112 emergency stop to reset the printer, and then I'm back to normal. Is there some other way to just switch it back on again?