Owner's manual

Cutter Diameter Compensation
(G40, G41, G42)
Chapter 21
21-2
We use these terms in this section:
inside -- An angle between two intersecting programmed tool paths is
referred to as inside if, in the direction of travel, the angle measured
clockwise from the second tool path into the first is less than or equal
to 180 degrees. If one or both of the moves are circular, the angle is
measured from a line tangent to the tool path at their point of
intersection.
outside -- An angle between two intersecting programmed tool paths is
referred to as outside if, in the direction of travel, the angle measured
clockwise from the second tool path into the first is greater than 180
degrees. If one or both of the moves are circular, the angle is measured
from a line tangent to the t ool path at their point of intersection.
r -- cutter radius
CR -- cross-point between two programmed paths after the cutter
compensation is activated
Two types of cutter compensation are available on the control:
type A (as described in the section 21.3)
type B (as described in section 21.4)
This table highlights the differences between the two types:
Type of Move Type A Type B
EntryMoveInto
Cutter
Compensation
The tool takestheshortest
possible pathto its offset
position.
• The tool staysatleastoneradiusaway
fromthestartpointofthe nextblock at
alltimes.
• Extramotion blocks canbe generated
to attemptto preventgougingofthepart
as may occur in Type A.
ToolPath Same
Exit MoveFrom
Cutter
Compensation
The tool takestheshortest
path to theend-pointofthe
exitmove forbothinsideand
outside corners.
• The tool takestheshortestpathto the
end-pointofexitmovefor inside
corners only.
• Foroutside corners,thetoolstays at
leastoneradiusawayfromthe
end-point.
The system i nstaller determines whether type A or type B is used by a
control in AMP.