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XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
Scale problem
Make sure that the Scale is installed correctly according to the
manufacturer’s instructions. Check for any loose brackets or
misalignment etc. Also, check to make sure the Scale
assemblies are functioning correctly. See Scales Sections 4.6 &
4.7
X and Y-axis Drive Trains are loose
Check Repeatability using the Repeatability and Positional
Accuracy procedure. Step by step, carefully inspect the Drive
Train for any looseness. It may be necessary to disassemble
and then reassemble the Drive Train. See Mechanical Drive
Train (X, Y) Section 4.2
3.2
Problems Regarding the Motion of the Machine
3.2.1
Run Away Axis
The axis makes an unwanted move at rapid speed in one direction and faults out. This is usually caused
by an encoder signal being interrupted.
Do the following Service Codes:
Code 33 Software Identification. This is needed if you call Customer Service
Code 100 Axis open loop test. Used to check the maximum feedrate of an axis and if the
encoders are counting properly
Possible Cause
Check This
Newall scales are counting in
opposite direction of motor encoder
Reverse directions with codes 321 and 322
The home positions or tools are not
set correctly
See the Controls Programming, Operations and Care manual.
The Sensor or Glass Scale is not
reading.
See TRAK Sensors or Glass Scales diagnostic Section 4.6 or 4.7
Bad Motor Encoder
See Motor diagnostics Section 4.4
3.2.2
Slow Down Axis
The axis slows down and moves at a feedrate that is lower than rapid or than the programmed feedrate.
Do the following Service Codes:
Code 33 Software Identification. This is needed if you call Customer Service
Code 100 Axis open loop test. Used to check the maximum feedrate of an axis and if the
encoders are counting
Code 129 Set's the maximum allowable arc accuracy error. This applies to arcs only
Possible Cause
Check This
The maximum allowable Arc
Accuracy is set too low.
This value will only slow down the machine during arc moves.
The factory default is set at 0.025 mm. Perform Code 129 to
check or change this value. See Service Codes section
Incoming AC voltage is inadequate
Perform Code 100. See Service Codes - Section 4.9 and
Electrical Section 4.8
Table, Saddle, or Ram Locks are
locked
Make sure the Table, Saddle, and Ram Locks are unlocked.
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 4.1.3
