Piranha CNC Plasma Cutting Table, Руководство по эксплуатации

Страница: 71 / 176

OPERATIONS
Sept-2018
71
12. SETTING KERF OFFSET
When plasma cutting, a kerf (or opening) is produced by the plasma arc. The cutting
current and cutting speed, as well as the diameter of the orifice in the plasma torch
nozzle determine the width of the kerf. Typically, the amount of offset will range
from 0.040” (1.0 mm) to 0.060” (1.5 mm) when cutting mild steel (refer to the plasma
cutting system manual for recommended kerf offsets). If the cutting path is not
modified to compensate for the kerf width, the completed cut will be undersize (for
external cuts) or oversize (for internal cuts) by the amount of the kerf width. The
machine control compensates for the kerf width without the need to redefine the
actual path. The operator must enter the desired compensation amount into the
control using the following procedure.
Kerf offset can be set from Automatic operation menu.
Press the KERF button.
Enter the offset for the Kerf in the GAP EXPIATE entry area and press enter when
finished.
After entering the value, it is a good idea to run a test square (approximately 4”
square) and measure the size of the part. If it is undersize, then the kerf value is too
small and the operator should add to it. If it is oversize, then the kerf value is too
large and the operator should subtract from it.