Tormach PCNC 440 - Page 81

Chapter 6
81
UM10372_PCNC440_Manual_0221A
PATHPilOT iNTERFACE
The outer bound of the area is the stock material's outer edges. The inner bound is the island
perimeter. For the cung roune, the area is divided into four secons (north, east, south, and
west). As with Face, the starng posion for cung each secon is o the workpiece with an X or Y
feed into the workpiece, thus avoiding a Z plunge cut. Cung paths are restricted to climb cung,
so the tool is retracted to Z Clear at the end of each sweep of a secon, with a rapid move to the
beginning of the secon for the next sweep. Aer each secon is cut, the corner radii, if any, are cut
with a tool path that travels around the perimeter of the island. This process is repeated for each
Z Depth of Cut pass. If a nish pass is needed, leave enough material, then append your nishing
G-code (usually a single pass around the perimeter) to this le later. Feed rate on the radius cuts are
adjusted to compensate for the dierence between the tool control point rate (at the tool center)
and the actual rate at the radius surface.
X and Y Start and End DROs
Start and End – These DROs should be set to the locaon of the workpiece edges. Tool paths outside
of the workpiece area are set in reference to these values so no adjusng beyond the actual locaon
of these edges should be needed.
Prole Start and End – The tool radius is used to create the tool path, so these DROs should be set
to the locaon of the prole outer edges.
Radius – Enter 0 if no corner radius is desired. Valid radii values are from 0 to one half of the island’s
narrow width (or limited to full radii on the long ends of the island).
Stepover – This is the tool path oset between secon sweeps. A stepover of 0 creates a single pass
(or rectangular slot) around the perimeter (outside) of the boss.
Figure 6.29