System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
For internal threads, the start point is the center of the thread for cutter compensation both on and
off. If external threads are programmed, it starts at the center and rapids to the feed down point
using the following formula for cutter compensation off.
X = thread radius + [2 X tool radius] + 0.1
Cutter compensation on the control uses the following formula to calculate the feed down point.
X = thread radius + [3 X tool radius] + 0.1
For external threads the machine will move as in the following figures.
External/Right External/Left
Polygon Cycle (G666)
The G666 autoroutine is used for cutting polygons (equally sided shapes), such as triangles,
squares, pentagons, hexagons, etc.
The polygon cycle can be used to cut inside or outside. The inside polygon starts in the middle
and spirals to the shape, then cuts the polygon and spirals back to the center. Outside polygons
must be positioned to the center (or use the G65 X___ Y___ to specify the center). The move
from the center to the outside uses the same formula as the circular finish outside or the
rectangular finish outside, for the framing polygon cycle.
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