Hypertherm Duramax Hyamp Robotic Torch - Manual (Page 52)

52 Duramax/Duramax Hyamp Robotic Torches Service Manual 807460
3 – Operation
 The torch is fired into the air (beginning or ending the cut off of the plate surface). Starting at the edge is acceptable
as long as the arc makes contact with the workpiece when started.
 A pierce is started with an incorrect torch height. See the cut charts in the Torch Setup section of the system’s
Operator Manual for the specific initial pierce height.
 The pierce time is incorrect.
 The air quality is poor (oil or water in the air).
 There might be a faulty pilot arc IGBT, which can shorten nozzle life.
 The swirl ring or retaining cap is worn and needs to be replaced.