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XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
Possible Cause
Check This
Most often causes by excess
backlash compensation
Check physical backlash in system and re-enter in code 128.
Run code 11 on single feedback machines
High feed forward values
Check ball screw torque. Typical values should be between 10
to 15 in-lbs for the 2500 & 3500 & 15-20 in-lbs for the 4000 &
5000.
Excessive friction in the sliding ways
Lubrication, gib adjustments, gib locks.
See Machine Tool & Setup - Section 4.1
Looseness in the drive train
The drive train of the axis that is searching, especially the
tightness of the drive assembly.
See Mechanical Drive Train (X, Y) - Section 4.2
3.3
Problems Relating to the Operation of the Control
3.3.1
Display Blanks
The display is completely blank.
Possible Cause
Check This
Screen saver has been activated
Press any key to turn back on. All LED keys on pendant will
blink when the screen saver is on. Press any key to deactivate.
Hitting this key will not activate any feature on the control.
The system has shut down
Turn the power switch off, check the computer/ pendant fuses
and cable connections. See Electrical Section 4.8
Fuse blown in pendant
Remove fuse and check continuity
Display/Computer/Pendant failed
See Computer/Pendant Section 4.3
3.3.2
Bad Picture on the Display
The display has strange characters, horizontal bars or other unfamiliar images, or the display continually
rolls.
Possible Cause
Check This
Display/Computer/Pendant failed
See Computer/Pendant Section 4.3
3.3.3
Keyboard Lockup
The screen display is normal, but the system will not respond to key presses.
Do the following Service Codes and procedures:
Code 81 press each key on the pendant. The screen will display a keypad that signifies if a key
is working. The pendant will also beep.
Possible Cause
Check This
Voltage drop/spike has occurred
Shut down the system and wait 10 seconds to reboot the
system.
Remote Stop-Go (RSG) switch has a
short (if connected)
Remove the RSG. Turn the system off and then on again. If the
problem goes away and then re-appears when the RSG is
plugged-in, replace the RSG.
Computer/Pendant failed
See Computer/Pendant Section 4.3
3.3.4
Axes Fault (X, Y or Z)
The program run or jogging operation is interrupted with a Fault Message on the display.
