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TRAK Machine Tools
Southwestern Industries, Inc.
TRAK TMC Mills with ProtoTRAK RMX CNC Safety, Installation, Maintenance, Service & Parts List
3.2.3
Searching Axis
The DRO screen is flickering back and forth when the servos are engaged. Several ten thousandths of
motion are observed and the frequency is one cycle every couple of seconds.
Do the following Service Code and procedures:
•
Code 128
Backlash compensation
Possible Cause
Check This
Most often caused by excess backlash
compensation
Check physical backlash in system and re-enter in code
128.
Looseness or excessive friction in the
drive train
The drive train of the axis that is searching, especially the
tightness of the drive assembly.
3.2.4
Homing Error
–
Axis, Tool Changer
The homing function is a very critical function that locates and identifies the absolute machine zero
position, where all other positions and offset are derived from. This function is to be performed every
time the system has been turned on or reset. The homing function will cause the tool changer to move to
tool position one, it will also cause each axis to move in the most positive direction that it can.
Do the following Service Code and procedures:
•
Code 505
Overtravel Soft Limits
Possible Cause
Check This
Door is open.
If the Door is open the tool changer will not turn, a “Door
Error” should be displayed.
Wiring problem with tool changer.
Verify that the tool changer wiring is correct.
Tool changer in or out failure. Note the
tool changer should be in the out position
when homing.
Contact TRAK for service
Tool changer will not rotate. Note the tool
changer should home to where tool
position 1 is facing toward the spindle.
Contact TRAK for Service
Home Switch failure.
Contact TRAK for Service
Servo Drive failure
See Servo Driver replacement, Section 5.1.9.
Motor failure
Contact TRAK for Service
Computer Module failure
Contact TRAK for Service
