5 axis machine ab to ac

[deadmetal333]

im building a small prototype of a 5axis cnc machine fixed trunion. im a cnc programmer but i must admit that im a beginner for software programming. i have a aliexpress 6 axis board that came with fluidnc but i needed canned cycle so i flashed grlhal into it. i used bdring_i2s_6pack_ext_v2_map.h and modified some of the pin into it. im able to get my 5 axis working and limit switch. my only problem is that i want a 5 axis configuration with xyzac not xyzab. how can i activate c axis without b ? or can i rename b to c ?

[terjeio]

or can i rename b to c ?

You have to "fake" it by modifying gcode.c to use C instead of B for the B-axis value, and also modify the axis bit to pin-name mapping in nuts_bolts.c.

It is on my longer term to make this compile time selectable...