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yes following error seems too small:
0.0005 of a degree

The only difference with analog channel 5 is that its enable is separate
(making the enable useful for a spindle)

Thanks for the help with C axis setup. I still have a problem with following errors - I changed the FERROR value in the INI file to 1.0 and MIN_FERROR to 0.5 and I still get a following error and no motion when I try to use the jog buttons in AXIS. When I try to use MDI I always get some kind of complaint about being out of range of one of the joints. Any brainstorms would be appreciated.

EDIT: Actuallty I get a tiny jolt of motion before I get the following error. Something's working. It's as if it thinks the encoder direction is reversed.

EDIT AGAIN: Got it moving, just needed a lot more proportional gain.

excellent. does it still error in MDI? maybe the min-limit max_limt range is to high ?

by the way there is a option for rotary tables in linuxcnc 2.5 that PNCconf doesn't know about yet. from the manual:

WRAPPED_ROTARY = 1 - When this is set to 1 for an ANGULAR axis the axis will move 0-359.999 degrees. Positive Numbers will move the axis in a positive direction and negative numbers will move the axis in the negative direction.

I've been playing around with the jog buttons for the moment to try to tune my gains a bit better. It took me a little while to figure out how to properly use the HAL scope but I think it's going to be an excellent tool for that.

I can't seem to run the table in MDI - when I give a g0 c90 command it says "Linear move in MDI would exceed joint 2's negative limit". I'm not sure if I'm using bad syntax or it's misinterpreting the command as a linear move command.

Thanks a lot though, this is major progress. Very exciting.

that is weird as joint 2 is the Z axis....
X 0
Y 1
Z 2
A 3
B 4
C 5
I'm sorry I have no experience with a rotary axis - hopefully someone else will chime in.