Tormach 1300PL, Operator'S Manual

Page: 65 / 100

9: TROUBLESHOOTING
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Specifications subject to change without notice. Page 65 UM10720: 1300PL Operator's Manual (Version 0820B)
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Cause: Ohmic Probe Wire Disconnected From the Torch Cap
Probability How-To Steps Need More?
Medium
1. Check that the ohmic probe wire (481 on the electrical diagram) coming
from the X axis carriage is connected to the torch cap.
2. Check that the connector on the rear of the electrical cabinet (X27 on the
electrical diagram) is connected.
To test the wire for breaks, use a
multimeter in continuity mode to
measure between the torch cap and
Pin 5 on connector J2 (labeled CAP) on
the Tormach THCT board in the
electrical cabinet.
Cause: Ohmic Touch Sensitivity Adjusted Incorrectly
Probability How-To Steps Need More?
Low
1. Open the electrical cabinet and locate the Tormach THCT board (PN
39096).
2. Adjust the "RV1" potentiometer clockwise to increase the sensitivity, until
a ground clamp touched to the torch nose triggers the probe.
Sensitivity is adjustable to account for
different workpiece materials and
situations (wet metal).
See "Calibrate Initial Height Sensing"
(page 40).
Cause: THCT Board Disconnected From the Machine Control Board
Probability How-To Steps Need More?
Low
1. Open the electrical cabinet and locate the Tormach THCT board (PN
39096).
2. Using a multimeter on continuity mode, check the connection between
THCT J1 Pin 6 (PROBE-) and J9 Pin 5 on the main control board.
3. Perform the same check between THCT J1 Pin 7 (PROBE+) and J9 Pin 6 on
the main control board.
4. If both connections measured good, switch the multimeter to DC Voltage
mode and measure the voltage between J9 Pin 6 and 7 on the main control
board. The reading should be -3.5v without the probe tripped, and +3.5v
with the probe tripped.