Hypertherm LH2100 - Manual (Page 36)

1
OPERATION
LH2125/LH2100 Laser Head Instruction Manual 4-9
3. Touch the nozzle to verify that the under-range LED illuminates.
The capacitive height sensor is now calibrated. Periodically check the over-range LED to verify that it is illuminated when
the distance between the nozzle and the work piece is greater than (>)10 mm.
Note: The output voltage can change when the ambient temperature changes. An ambient temperature change of 15° C
(27° F) is usually acceptable. If the temperature change is greater than (>) 15° C (27° F) it could result in a small change
in the correct nozzle-to-workpiece height during cutting.
Example: if the nozzle-to-workpiece height during cutting is 1.5 mm, a 10° C change can produce a 0.2 mm shift in the
nozzle-to-workpiece height. In the larger nozzle-to-workpiece height range (5-10 mm) it can cause a larger change in
nozzle-to-workpiece height because the sensitivity is reduced.
Note: The nozzle must be cool enough to touch with your bare hand before it is installed to avoid the following
condition:
If a hot nozzle greater than (>) 50° C or 122° F) is installed on the cutting head, it will contract as it is cooled by
the nozzle adapter. This will result in a large frictional force between the nozzle and adapter and will make it
difficult to remove by hand. If this condition occurs, a pair of pliers may be necessary to remove the nozzle.