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TRAK Machine Tools
Southwestern Industries, Inc.
TRAK TRL Lathe, ProtoTRAK RLX CNC Safety, Installation, Maintenance, Service & Parts List
3.5 Problems with the Machine Tool
3.5.1 Spindle Stalls or Turns-Off During Machining
During machining, the spindle turns off and loses power. First check incoming voltage and
connections.
Possible Cause
Check This
Machine Tool and Setup problem
Check the type of material being cut, type and size of cutting tool,
RPM, and Feed rate. Also check the condition of the cutter to verify
that the cutter is not dull. See Machine Tool & Setup Section 4.1
Motor drive Belt is slipping
Check the alignment, condition, and tension of the Drive Belt.
Cut more than the machine is capable
Check speeds, feeds and depth of cut
Spindle Drive Thermal Overload Relay
has tripped
IOUT - Current Out (located on the Spindle Drive). When the Overload
Relay is enabled, an "oL1" error occurs shutting off the Spindle Drive.
The harder the Spindle Motor works trying to make heavy cuts, the
more current the Spindle Motor utilizes. This can be caused by a cut so
large that it exceeds the machine capability, or a problem with the
spindle motor or AC drive.
Spindle Drive parameters are not
correct
May need to re-download the Spindle Drive parameters. Contact
Customer Service for assistance.
3.5.2 Spindle Motor Hums or Will Not Run
The spindle motor makes a constant humming noise during operation or will not turn on.
Possible Cause
Check This
Wrong voltage
Check the 208V voltage to the machine
Poor wiring connections
Check all the wiring connections to the electric’s box.
Defective cable connections
Check all cable connections
Spindle Motor is bad
Check the resistance of the Spindle Motor windings on the Spindle
Motor between L1 & L2, L2 & L3, and L1 & L3, using an Ohmmeter.
The resistance should range from ".7 to 1.8 Ohm". If the Ohmmeter
reads "0 Ohms" or "OL", then replace Spindle Motor. Next, check the
resistance between L1 & Ground, L2 & Ground, and L3 & Ground,
using an Ohmmeter. The resistance should read "OL". If not then
replace Spindle Motor.
3.5.3 Spindle Runs Backwards
The spindle motor runs in the opposite direction. The spindle should always spin in the counter
clockwise direction as viewed from the tailstock end of the lathe when the forward key on the
pendant is pressed.
Possible Cause
Check This
3-Phase wires backwards
Need to switch any 2 of the 3 wires either coming out of the
Spindle Drive (T1, T2, and T3) or going into the Spindle Motor (U,
V, and W). Caution: Be sure to shut off all power to the machine
before attempting to switch any wires.
