63
TRAK Machine Tools
Southwestern Industries, Inc.
ProtoTRAK SMX, K2, K3 & K4 & Retrofit Safety, Installation, Maintenance, Service and Parts List Manual
Write down the reading on the DRO.
Do not re-zero the DRO, traverse away and return several times
Write down the DRO readings
Random error
will be unpredictable and give scattered readings, adding and/or subtracting the error after each
traverse with no pattern. See Step 2.
Accumulating error
will add roughly the same amount to the reading after each traverse. See Step 3.
2.
For random error, look for problems in the set-up of the TRAK Sensor that have resulted in a loss of rigidity.
Common sources of random error include:
broken base
broken bracket
loose puller screws
loose run bar
very loose motion of the table or saddle
loose clamp screw
3.
Accumulating error is almost always the result of the wheel not traveling in a path parallel to the motion of
the axis. This causes the wheel to skip at certain regular points in its travel.
Inspect the base to determine if it has been damaged. A damaged base will usually have crinkles in the
small, triangle-shaped plates on the front and back.
Use a bubble level or an indicator to adjust the puller screws so that the base is parallel to the running
surface.
Inspect that the sensor is not cocked so that the case contacts the running surface.
Inspect the wheel for chips that are adhered or for gouges.
4.8 Electrical
4.8.1 Checking A/C Voltage
This procedure tests for the 115V power for the control.
Use a Voltmeter, reading A/C volts.
Acceptable range is 100V to 130V.
Note: systems running consistently close to the low values may have problems when normal voltage fluctuations push
the voltage out of the acceptable range.
Test the following in the order presented:
Problems Here:
May Indicate:
1.
The wall outlet.
Fuse blown in the shop electrical
panel.
Incoming service from local utility
is bad. Call the electric company.
2.
The control power cord from the wall.
Check the end that goes to the electrics
box.
Power cord defective.
3. Check the top fuse on the electrical cabinet.
It should be an 8-amp fuse.
If this is blown then power will not
reach the 4 outlets on the electrical
box.
3.
Check the 110-power cord to the pendant.
Power cord defective
4.8.2 Checking Fuses
CAUTION!
Turn off power before removing and replacing fuses.
