102
TRAK Machine Tools
Southwestern Industries, Inc.
TRAK TMC Mills with ProtoTRAK RMX CNC Safety, Installation, Maintenance, Service & Parts List
6.5
Troubleshooting by Symptom
The following table lists a number of symptoms you may come across with the 4
th
axis unit.
Symptoms
Diagnostics or Possible Causes
4
th
axis will not home or homes
incorrectly
1.
Make sure the 4
th
axis option is turned on. Go to Setup
Mode.
2.
Verify the 4
th
axis can jog in DRO mode and move with
the handwheel.
3.
Check the sensor light status on the top of the 4
th
axis
assembly. It should be ON with amber LED light for
positions away from HOME and OFF when in HOME. The
sensor light should change state with the rotation of the
chuck across HOME position.
4.
Check if the sensor light status on the top of the 4th axis
assembly matches the green LED indicator on the
computer module input P72-IN 4TH HOME. Check if the
state of the LED changes with the change of state of the
sensor LED light on 4
th
axis assembly.
4
th
axis will not move when
attempting to jog
1.
Make sure the 4
th
axis option is turned on. Go to Machine
Setup Mode.
2.
If a fault appears, double check all motor connections in
the electrical cabinet. Check LED status on servo amp.
4
th
axis is not coming back to zero
1.
Make sure the 4
th
axis homed properly. Go to service code
506 to home the 4
th
axis individually.
2.
Make sure the backlash compensation is set correctly
using service code 128.
3.
Motor encoder may not be reading correctly
Cutter is chattering when cutting
1.
Make sure you setup is tight. Clamps on table, chuck and
adapter plate, etc.
2.
Make sure the unit does not have excessive backlash.
Parts are not accurate
1.
Possible programming error. Check your program.
2.
Make sure the 4
th
axis homed properly. Go to service code
506 to home the 4
th
axis individually.
3.
Make sure you have set your part zeros correctly.
4.
Double check if service code 506 is set correctly. If these
offsets are wrong, your part will come out wrong.
5.
Check to make sure your backlash compensation is set
correctly.