Aspire Rotary 4th axis

[Gabjohn1]

Aspire Rotary 4th axis

[terjeio]

I do not think that a special post processor is needed for wrapping around the Y-axis. Wrapping Y-axis motions to a rotary axis (A, B or C) would require a post processor supporting 4 or more axes - IMO not too hard to add by editing the default grbl post processor.
FYI ioSender has experimental support for wrapping Y motions to a rotary axis...

[Gabjohn1]

Thank you terjeio,
Here are a few options for PPs on my Vetric Aspire...

If I save my file with a *.gcode and run it in IO Sender then the bit moves in the Y directions and not the rotary A. (3d view in IO looks legit) If I save with a *.tap file the Y stays stationary and seems to work but the 3d view in IOSender is just a straight line. I saved with "GCode Wrap to A" . Sorry for the confusion, I just feel like I'm doing something wrong.
Any help is so appreciated!

[terjeio]

Did you edit the grbl PP (make a copy first and use that for rotary jobs)?
From the documentation it seems you have to add this line in the header:

ROTARY_WRAP_Y=A

also inverse time mode might have to be enabled, or you have to compile grblHAL with the rotary fix enabled:

INVERSE_TIME_MODE="YES"

The rotary fix can be enabled in the Web Builder here:

[Gabjohn1]

Yes, that makes more sense. I will create/edit a pp. And compile the firmwareThanks!