Hi All,
Has anyone seen small occilations in he cut finish on a Bystronic
Byspeed 4400, 31,000 hours on time. It maybe it needs new ballscrews although they dont appear to have obvious signs off wear. With the power on if you try to push the machine off position with the power on the machine comes back to withing 0.03 mm both directions
with a dti on the cutting bridge which of course it should do because its reading off the the linear scale rather than an encoder on the motor.The optical tacho mounted on the main servos is not full of excess grease from the ball screws.
The wavy cut is most noticeable on 5mm and under and when 2 axis are moving together
The servo drives are the old analogue type just before the byvison cnc.
With the power off I can not feel any play if I turn the leadscrew nut/motor and watch a dti on the bridge and pushing it by hand sounds ok and feels smooth.
Turning down dynamic factor and accel and brake factor may reduce the problem slightly
but does not remove it.
It does not appear on 10mm thick oxygen cut plate at all but does appear on 3mm nitrogen and oxygen cut part quite bad. It not just a simple case of occilation after changing direction. and the strangest thing we think it appears in minus x direction
and on the right hand side of the cut.
It is fine and most parts are still okay but nowhere as good as a new machine
Our service tech did test cuts of triangles parrallel to the axis on different materails
and could not firgure out if it is a mechanical problem or not.
Bystronic drives do not seem to have tuning options like typical servo drives and motors
Is there any setup cnc settings that may help or way I can at least figure out the
exactly where the problem is.
thanks
Jetray
Has anyone seen small occilations in he cut finish on a Bystronic
Byspeed 4400, 31,000 hours on time. It maybe it needs new ballscrews although they dont appear to have obvious signs off wear. With the power on if you try to push the machine off position with the power on the machine comes back to withing 0.03 mm both directions
with a dti on the cutting bridge which of course it should do because its reading off the the linear scale rather than an encoder on the motor.The optical tacho mounted on the main servos is not full of excess grease from the ball screws.
The wavy cut is most noticeable on 5mm and under and when 2 axis are moving together
The servo drives are the old analogue type just before the byvison cnc.
With the power off I can not feel any play if I turn the leadscrew nut/motor and watch a dti on the bridge and pushing it by hand sounds ok and feels smooth.
Turning down dynamic factor and accel and brake factor may reduce the problem slightly
but does not remove it.
It does not appear on 10mm thick oxygen cut plate at all but does appear on 3mm nitrogen and oxygen cut part quite bad. It not just a simple case of occilation after changing direction. and the strangest thing we think it appears in minus x direction
and on the right hand side of the cut.
It is fine and most parts are still okay but nowhere as good as a new machine
Our service tech did test cuts of triangles parrallel to the axis on different materails
and could not firgure out if it is a mechanical problem or not.
Bystronic drives do not seem to have tuning options like typical servo drives and motors
Is there any setup cnc settings that may help or way I can at least figure out the
exactly where the problem is.
thanks
Jetray