Hypertherm LR2075 - Manual (Page 31)

OPERATION
4-6 LR 2075 Laser Head Instruction Manual
Description Corrective action
The TIP TOUCH signal is constantly high
Look for an electrical short between the nozzle and ground
or the nozzle and the retaining nut.
1. Verify that the insulating washer is installed between
the nozzle adapter and the retaining nut.
2. Clean any debris from the nozzle and retaining nut area
with a rag and compressed air.
The TIP TOUCH signal does not increase when the nozzle
touches the workpiece or is touched by hand
Look for a bad connection between the nozzle, the nozzle
adapter, and the contact pin.
1. Remove nozzle and nozzle adapter and verify that the
tip touch signal is generated when the contact pin is
touched.
2. Verify +15 VDC and –15VDC are supplied
3. Clean and replace parts as necessary.
4. Contact technical service for assistance.
Nozzle height is not at the correct level while cutting
1. Verify that the nozzle adapter nut is securely tightened
2. Verify that the insulating washer is installed and is not
damaged.
3. Verify that the signal voltage, on socket number 4
(analog out) of the capacitive height sensor cable, is
approximately –5VDC when the nozzle to workpiece
distance is 1 mm. See left side connections in
section 3.
The distance signal does not change as the distance
between the nozzle and the workpiece changes
1. Verify proper connections of all wires and that the
correct supply voltages are present.
2. Remove the nozzle and the nozzle adapter, and verify
that the distance signal, on socket number 4
(analog out) of the capacitive height sensor cable, is
approximately –10 VDC, when the nozzle to workpiece
distance is 1 mm. See left side connections in
section 3. The signal should change to about +11 VDC
when the nozzle is touched.
3. Inspect the nozzle, the insulating washer, and the
nozzle adapter, replace if necessary.
Poor cutting performance
1. Inspect and clean the lens. Replace if necessary. If the
lens has a noticeable odor, clean first with a mild acetic
acid solution (vinegar), followed by distilled water and
methanol or acetone.
2. Verify that the surface seals on the lens holder and the
lens blank are installed and not damaged. Replace if
necessary.
3. Verify that the manual focus position ring is set for the
correct focal position. Verify the focal position by
repeating the focus finding procedure, if necessary.
4. Verify that the the o-ring on the top side of the nozzle
adapter is properly sealed.
5. Verify that the insulating washer is not damaged.
Replace as necessary.
5. Verify that the beam is centered in the nozzle orifice.
Capacitive height sensor troubleshooting