XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
Calibration or Backlash problem
Recalibrate the machine. Reset the Backlash. Check
Repeatability and Positional Accuracy. See Calibration &
Backlash Constants section.
Binding in the Drive Train
Check Repeatability using the Repeatability and Positional
Accuracy procedure. Check the torque reading of the Drive
Train. Step by step, carefully inspect the Drive Train for any
binding. It may be necessary to disassemble and then
reassemble the Drive Train. See Mechanical Drive Train (X, Y)
Section 4.2
3.2.5 Vibration in Motion
While axis is moving there is vibration or noise coming from the X or Y-axis.
Do the following Service Codes and procedures:
Code 11 Measure's the backlash in the system. Only used on machines with Dual Feedback
systems
Code 12 Feed Forward Constant. High feed forward constants will cause an unstable servo
system
Code 127 Measure's the backlash in the system. Only used on machines with no Dual Feedback
Code 128 Enter backlash compensation
Code 123 Calibrate
Too much backlash entered in Code
128 or Code 11.
Recheck the machines backlash.
Inadequate or no Lubrication to
Ballscrews and Way surfaces
Make sure all the Way surfaces are getting proper lubrication. If
not, check to make sure that the lube pump is functioning
properly. Also check for any pinched or blocked oil lines. See
Lubrication section
X, Y, and Z-axis Gibs are not
adjusted properly
Check the adjustment of the X, Y, and Z-axis Gibs using the X,
Y, and Z-axis Gib adjustment procedures.
Gibs not making good contact.
Pull gibs out and mark with a blue die to check where the gibs
are making contact. It is recommended that the gibs uniformly
contact at least 80% of the surface.
Binding or looseness in the Drive
Train
Check Repeatability using the Repeatability and Positional
Accuracy procedure. Check the torque reading of the Drive
Train. Step by step, carefully inspect the Drive Train for any
binding or looseness. It may be necessary to disassemble and
then reassemble the Drive Train. See Mechanical Drive Train (X,
Y) Section 4.2
Axis Motor belt too tight.
Misalignment of ball screw
See Mechanical Drive Train (X, Y) Section 4.2
3.2.6 Searching Axis
The handwheels are slowly turning back and forth when the servos are engaged. Several thousandths of
motion are observed on the vernier dial and the frequency is one cycle every couple of seconds.
Do the following Service Code and procedures:
Code 11 Measures backlash in system. (Used only with glass scales and sensors.)
Code 12 Sets a feed forward power constant to drive axis motors
Code 128 Backlash compensation on single feedback machines