Hypertherm HyIntensity Fiber Laser Rev.3 - Manual (Page 216)

Maintenance
4-24 HyIntensity Fiber Laser Instruction Manual – 807090 Revision 3
troubleshoot the nozzle extension calibration
Nozzle extension calibration must detect at least two volts from 0 mm to 18 mm. This can be verified using LHC
diagnostic display. The Noz Pos variable displays the nozzle position voltage. If there is < 2 volt change in the voltage
during calibration:
1. Check the head for proper grounding.
2. Check, and if necessary, replace the cable or connector on the 12-pin cable (223169) between the LHC and
the laser head.
3. Cycle power to the laser power supply and try calibration again.
If these steps do not correct the problem, the laser head requires factory service, or the system must be operated using
manual nozzle positioning until factory service is possible.
troubleshoot CHS calibration errors
The CHS calibration routine in the laser head controller must detect a change of at least 2.5 volts from 1 mm to 10 mm.
To verify that the CHS sensor is producing an accurate voltage:
1. Navigate to the LHC diagnostic screen for AIN. RAW CHS is displayed in counts and a change in position
from 1 mm to 10 mm must be greater than a 820-count difference.
2. If this is not the case, check the head for proper grounding.
3. Check, and if necessary, replace the cable or connector on the 12-pin cable between the LHC and the laser
head.
Cycle power to laser power supply and try calibration again. If these steps do not correct the problem, the laser head
requires factory service, or the system must be operated using manual height control until factory service is possible.