GRBL 5 axis post processor

[eragonpower09]

It's been a while since I use the post processor grbl, it works perfectly and I've never had any problems, but recently I decided to upgrade my machine with two more axes still using the GRBL controller, I found this version of the controller which supports 4/5/6 axis: https://github.com/fra589/grbl-Mega-5X . I arrived almost immediately to a block, Fusion360 does not have a Post Processor for GRBL 5X, so I tried to write one, but with poor results, so I was wondering, is there anyone who can help me with this Post Processor possibly linking me also a guide on how to write Post Processors? 

[tsmarks]

I have put one together that seems to work with my 6Axis GRBL install.  I used the GRBL build from http://eccentricworkshop.com/ as it has the correct pin assignments for my set up, but it should all be built on the same GRBL core.  The CPS file is attached to the forum post here:  Multi-Axis GRBL 

Note, I have only tested 4th axis movements on a physical machine.  I don't have a 5th yet. 

Good luck!

[eragonpower09]

That's great! Thanks a lot @tsmarks , i tried posting a 4 axis toolpath and it worked well but i've encountered a problem, my Gcode Sender doesn't support more than 3 axis but it still can send gcode with more axis. Some suggestion about a better gcode sender with multi axis capability?

[tsmarks]

I use bCNC.  bCNC does not support 4+ axis, but will blindly send the gcode.  i use the terminal to move the a axis (i.e. g1 a360 F1000 to move the A axis 360 degrees) and have a macro set to zero the axis (g92 a0).   This might not be the most elegant solution, but it works for now.  I need to dig into the bCNC code and add more axis.

[tsmarks]

The new version of bCNC should now support multi axis.  My fork was just merged back into the main.