Quote Originally Posted by DarkAlchemist View Post
Well, the code is there in SF 7.7 but only for those other boards BUT is SF 100% .s3g/.x3g or does SF do gcode as well? If it is strictly .s3g/.x3g (I believe it is since I found no gcode interpreter as I do in Marlin) then what you read is no longer right since the code is here in SF 7.7 to do fan PWM but only for those other boards.
I think you're right in that sf is an x3g system through and through.
But as gcode and x3g are mainly different in that gcode is plain text and x3g is binary, the same rules and constraints are likely to apply to both of them.

In theory anyway, but then I've had less than 3 hours sleep in 4 days and I've had enough morphine today to (literally) kill 3 cows. So my poor wee brain isn't at its best digging through this and trying to sort out my website and get some programming done at the same time