I just finished watching a video by Garrett Fromme of IDC woodcraft about editing the post processor by adding a G4 spindle pause command to allow the spindle to get up to speed before starting the carve. Is this necessary if you edited the grbl firmware $392 setting in gSender? This may be a setting dedicated to the Altmill. To me, it looks like they do the same thing, but AI says they’re different. I’m currently setting up the Altmill 4x4 SLB-EXT and the PWNCNC water cooled 1.5kw spindle.
The spindle delay firmware setting is all I have set.