Tweco SC10 - Manual (Page 32)

CUSTOMER/OPERATOR SERVICE 5-2 Manual 0-2479
5.04 Troubleshooting Specific
Problems
A. Front panel switch for MODE, LIFTER SPEED,
TORCH UP or TORCH DOWN will not function
1. Connector J3 on the Standoff Control PC Board is con-
nected one pin off
a. Make sure connector is plugged in correctly.
2. Faulty front panel switch or Standoff Control PC Board
a. Test per Section 5.05-B and replace faulty as-
sembly as required
B. One or more, not all, front panel indicators will
not turn ON when expected
1. Faulty indicator or Standoff Control PC Board
a. Test per Section 5.05-C and replace front panel
assembly if necessary
C. Torch will not move up or down manually using
TORCH UP and TORCH DOWN switches;
TORCH UP and TORCH DOWN indicators come
ON
1. Torch Lifter Assembly rack and pinion gear misaligned
or not meshing
a. Lift up on the torch while pressing the TORCH
UP arrow to remesh the gears. May need to do
this several times to get the motor moving.
2. Dirty Lifter Slide or Rollers
a. Remove cover and clean Slide and Rollers
3. Mounting screw of Torch Lead Support Bracket too long
a. Replace with shorter screw
NOTE
The mounting bolts attaching the torch lead sup-
port bracket to the Torch Lifter Assembly can bind
if the mounting bolts are too long.
D. Torch will not move or no pilot arc when START is
pressed
Push front panel TORCH UP or TORCH DOWN
switch to see if torch will move manually. If torch
will move in either direction, then torch lifter motor
and cable are okay.
1. Check for binding of the torch lifter assembly slide.
a. Repair as required
NOTE
The mounting bolts attaching the torch lead sup-
port bracket to the Torch Lifter Assembly can bind
if the mounting bolts are too long.
2. Faulty torch lifter motor or cable
a. Check the motor and cable per Section 5.05-D,
repair as necessary
E. Torch moves down to work but does not retract to
PIERCE HT setting
1. PIERCE HT control is set fully counterclockwise
(CCW), minimum standoff
a. Adjust for higher standoff
2. Tip-On-Work micro-switch faulty, out of adjustment
or slide frozen so switch cannot be activated
a. Check the Tip-On-Work micro-switch per Sec-
tion 5.05-E, repair as necessary
F. Torch moves down to the work and retracts, but
stops at a point higher than the PIERCE HT
setting or continues to a point at the top of travel;
Pilot may activate when the travel stops
1. Tip-On-Work micro-switch circuit is faulty or have
dirty contacts
a. Check the Tip-On-Work micro-switch per Sec-
tion 5.05-E, repair as necessary
G. Torch moves up instead of down when it should
be finding height
1. Tip-On-Work micro-switch circuit is open
a. Check the Tip-On-Work micro-switch per Sec-
tion 5.05-E, repair as necessary
H. Torch finds height and starts cutting but cutting
machine doesn’t move
1. OK-To-Move signal not compatible with cutting ma-
chine controller. Signal set for contacts, but controller
needs AC volts or vice versa.
a. Change setting. Refer to Remote Control
(RC6010) Instruction Manual.
2. Faulty OK-To-Move signal
a. Check for proper OK-To-Move signal per Sec-
tion 5.05-F, repair as necessary