Emco PC turn 55 upgrade..

I have all of the f-errors set to .01mm now. Z backlash is .03 and the error had always shown up on the z. X is .016. I reposted the code I was running last night and I don't think I got any errors since then. I turned off "use high feedrate" in the cam, and it didn't change those moves to G0, but it did change them to a reasonable feedrate of 1mm/rev.

Does f-error have anything to do with how the machine follows the toolpath, or is it simply a limit that causes the machine to stop when exceeded?

You can hear the spindle chirping when it's trying to change speed to fast.

turbo wrote: Does f-error have anything to do with how the machine follows the toolpath, or is it simply a limit that causes the machine to stop when exceeded?

It is just a limit that triggers an error. And I do rather suspect that the system might need the f-error limit to be > backlash magnitude.

jmelson wrote: No reason to use output from the VFD, the spindle encoder will be the most accurate.

Limiting spindle acceleration should be done by putting a lowpass or limit HAL component between motion.spindle-speed-out and whatever sends the analog voltage to the VFD.

Jon

Could you please elaborate on limiting the spindle accel?

turbo wrote: Could you please elaborate on limiting the spindle accel?

Typically that is a ramp-time setting in the VFD menus.

I don't think there is any way to access the VFD programming without an add on module or special programming. I'm pretty sure I'm going to have to do it in hal.