AlfaGTA
Diamond
- Joined
- Dec 13, 2002
- Location
- Benicia California USA
I have a small flat bed CNC Lathe at home.
Its a Harrison Alpha 1330s, Running a Fanuc 21it control.
Doing some maintenance and notice something with the "Z" axis movement.
Using the MPG hand wheels with the movement step set to .0001" i see the carriage jump .002" when i change direction of the slide...
It is not lost motion but rather excess motion.
So if i am moving the "Z" one step at a time (.0001") in the minus (-) direction and change to going in the plus (+) direction, the actual move jumps .002" in the plus (+) then continues moving normally (.0001" per step)
Guessing this is backlash comp. Is this normal or has someone set the correction too high.
If so, is there a way to correct this.(procedure)
Thanks for any help or advice here.
Cheers Ross
Its a Harrison Alpha 1330s, Running a Fanuc 21it control.
Doing some maintenance and notice something with the "Z" axis movement.
Using the MPG hand wheels with the movement step set to .0001" i see the carriage jump .002" when i change direction of the slide...
It is not lost motion but rather excess motion.
So if i am moving the "Z" one step at a time (.0001") in the minus (-) direction and change to going in the plus (+) direction, the actual move jumps .002" in the plus (+) then continues moving normally (.0001" per step)
Guessing this is backlash comp. Is this normal or has someone set the correction too high.
If so, is there a way to correct this.(procedure)
Thanks for any help or advice here.
Cheers Ross