Hypertherm Powermax125 Service Manua - Manual (Page 108)

108 Powermax125 Service Manual 808070
7 – Mechanized Cutting
Excessive dross forms on the bottom of the cut.
 The gas setting is too high or too low.
 The consumables are worn and need to be replaced. For optimized performance in a mechanized application, replace
the nozzle and the electrode together.
 The cutting speed is not correct. See the cut charts under Using the cut charts on page 77.
 The current (amperage) is set too low. See the cut charts under Using the cut charts on page 77.
The cut angle is not square.
 The torch is not square to the workpiece.
 The gas setting is incorrect.
 The consumables are worn and need to be replaced. For optimized performance in a mechanized application, replace
the nozzle and the electrode together.
 The direction of the torch travel is incorrect. The high-quality cut is always on the right with respect to the forward
motion of the torch.
 The torch-to-work distance/cut height is too large or too small.
 The cutting speed is not correct. See the cut charts under Using the cut charts on page 77.
The consumable life is shortened.
 The gas setting is incorrect.
 The arc current, arc voltage, travel speed, and other variables are not set as recommended in the cut charts.
 Firing the arc in 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.
 Starting a pierce with an incorrect torch height. Refer to the cut charts 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 (refer to Troubleshooting and System Tests on
page 109, or contact your closest Hypertherm technical service in the front of this manual).
 The swirl ring or retaining cap is worn and needs to be replaced.