I am trying to use my 4th axis with limited success. When trying to cut a 4 axis pocket in something round, my post processor is generating the code and setting the F (feed) to 15 inches per minute (what I have set in my solidcam software).
This is fine for cuts that dont utilize the A -Axis (moving only in x and Y). Once the cut gets to a rotate command and the A Axis starts spinning, it feeds at what appears to be 15 deg/min (incredibly slow)
Curious as to how you guys are programming the 4th axis on your machine. Does your post processor/cam software is compensating for the size of the arc created and setting a new Feed on rotate?
Sorry if this is vague, or hard to understand still trying to wrap my head around 4th axis work myself.

Thanks
Here is just a little test part that I am trying to code
Solidcam starts the tool in the center of the pocket and more or less spirals out. I have a feeling the code would produce the correct part if I gave the machine a month to punch it out. 15 deg/ minute seams to creap along at a snails pace.

To give you an example of the code generated

G1 Y-0.547 Z0.053 F10.
G1 X5.249 F15.
G1 Y-0.549 Z0.028 A-87.073


The Tool Plunges into the material in line 1 at 10 ipm
The tool makes a small X movement at 15 IPM (from here on in the code feed is not changed)
The magic starts happening with the A Axis as the tool works out of the center of the pocket. but feed is still set at 15 (which is deg per min I beleive, not IPM)