Limit M486 A line length

[DerMouse]

When slicing some STL with a very long file name, the M486 A lines written by PrusaSlicer will trigger a printer reboot when sent through firmware side checksum validation. Problem is discussed here :

prusa3d/Prusa-Firmware-Buddy#4123
prusa3d/Prusa-Firmware-Buddy#4123 (comment)
prusa3d/Prusa-Firmware-Buddy#4123 (comment)

The slicer should at least warn the user if the sliced filename is too long, or truncate/shorten the file name in the M486 line. This will avoid triggering the problem for the normal user.

[Jan-Soustruznik]

Hello, @DerMouse , What maximum limit of the name is expected? Thank you

[DerMouse]

Hello, @DerMouse , What maximum limit of the name is expected? Thank you

Hello Jan. Since the M486 lines written by PrusaSlicer use the sliced filename, theoretically the sky is (almost) the limit. But I guess that, reasonably, something around 50-60 chars should be good (who in his right mind has filenames consistently longer than 60 chars, except me and this was a very very edge-case ?)

[FidelCapo]

This issue should be fixed in version 2.9.0-beta1.
Closing.