100
TRAK Machine Tools
Southwestern Industries, Inc.
TRAK TMC Mills with ProtoTRAK RMX CNC Safety, Installation, Maintenance, Service & Parts List
6.4
Service Codes: 4
th
Axis
The following service codes are specific to the 4
th
axis option.
6.4.1
Code 318: Turn on 4
th
Axis Option
Used to turn on the 4th axis option software.
6.4.2
Code 128: Input Backlash Constant
The following service code enters a backlash compensation value for each axis on the TMC. The A axis
backlash is to be entered in a decimal angle.
Procedure to check backlash:
1.
Mount an indicator on the 4
th
axis unit as shown in figure 6.4.2.
2.
Go to DRO mode and load your indicator a few thousandths or 50 microns from one direction and
set zero on your indicator and on your DRO. It is best to use the .0001” or 0.002 mm button
when using the EHW for this.
3.
Rotate the 4
th
axis in the same direction until you see a few thousandths or 50 microns of
movement on the indicator.
4.
Reverse the axis and go back to zero on the indicator. The amount of error you see on your DRO
screen is your backlash.
5.
Enter this into service code 128.
6.
Now redo this procedure and make sure the DRO and indicator both come back to zero. Adjust
as necessary.
Figure 6.4.2
–
Dial Indicator Mounted on the 4
th
Axis
