I am having problems with the a axis not moving smoothly between coordinates. The following example code works fine:

g64
g93
g1
a1 y1 f600
a2 y2 f600
a3 y3 f600
a4 y4 f600

When I remove the y coordinates and try to run the following code, the a axis stops at every point:

g64
g93
g1
a1 f600
a2 f600
a3 f600
a4 f600

I apologize if this is a g code error, and therefore in the wrong forum, but I am assuming it is a problem with my Mach4 setup.
Any help would be really appreciated!

Correct the cv is not done for the a axis

That is considered a positional axis

Thanks Brian! That makes sense.
So my solution has been to add some "creep" to another axis while a is moving. Kind of silly, but it works ok.

What would be much better would be if I could switch back and forth between using the a axis as a spindle and an axis. It seems like mach3 might have had that ability? I posted that question as a new topic: https://www.machsupport.com/forum/index.php?topic=44433.0