Tormach 1300PL, Operator'S Manual

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9: TROUBLESHOOTING
©Tormach® 2020
Specifications subject to change without notice. Page 66 UM10720: 1300PL Operator's Manual (Version 0820B)
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9.1.2 Ohmic Probe Triggers Early or Between Cuts.
Cause: Plasma Torch Cap Is Wet
Probability How-To Steps Need More?
High
1. Use the TEST TORCH button to purge the torch cap. Make sure to jog away
from the workpiece first.
2. Using compressed air, blow any water out of your torch cap.
3. Adjust ohmic touch sensitivity as detailed below.
Water in the torch cap can cause ohmic
probing to trigger because it creates a
circuit between the torch nozzle (Arc-)
and cap. Since the nozzle is electrically
connected to the workpiece clamp
(Arc+) by the arc voltage divider, this
can trigger the ohmic probe.
Cause: Ohmic Touch Sensitivity Adjusted Incorrectly
Probability How-To Steps Need More?
High
1. Position the torch in above the workpiece in a small puddle of water, so
that the torch cap is touching the water but not the workpiece.
2. Open the electrical cabinet and locate the Tormach THCT board (PN
39096).
3. Adjust the "RV1" potentiometer counterclockwise to decrease the
sensitivity until the ohmic probe is not triggered by the water but is still
triggered if you lift the workpiece to touch the torch cap.
Ohmic touch sensitivity may need to be
adjusted when you switch between
styles of consumable or torch cap.