Wire EDM Machine Operation Chapter 8
Copyright November, 98 Page 8-6 Sodick Inc.
N025 G51 A1.0 (TAPER LEFT WITH 1 DEGREE ANGLE)
N030 C411 (SELECT CUTTING CONDITION)
N031 T84 (HIGH PRESSURE FLUSH)
N032 T91 (AUTO THREAD)
N035 G01 X.485 (MOVE TO POINT 2)
N040 Y.015 (MOVE TO POINT 3)
N045 G03 X.5 Y0 I.015 (ARC IN APPROACH TO POINT 4)
N050 G01 X1. (MOVE TO POINT 5)
N055 Y1. (MOVE TO POINT 6)
N060 X0 (MOVE TO POINT 7)
N065 Y0 (MOVE TO POINT 8)
N070 X.4 (MOVE TO “GLUE STOP” POINT")
N075 M00 (STOP TO SUPPORT PART)
N080 X.5 (MOVE BACK TO POINT 4)
N085 G03 X.515 Y.015 J.015 (ARC OUT TO POINT 9)
N090 G01 Y.2 (MOVE TO POINT 10)
N095 G40 G50 X.5 (CANCEL RADIUS COMP AND TAPER, MOVE)
N100 M02 (END OF PROGRAM)
This program needs a little explanation. Blocks N035 to N045 and N085 to N095 allow
the wire to instate and cancel compensation and offset on a “dummy move”. This does
two things. First, you know that wire radius compensation, when it is instated, may make
an angular move to initiate. For punches this is fine, since the approach is in the glue stop
area and is going to be ground off on a surface grinder anyway. But for a die, there will
be no subsequent grinding operation. The entire inside shape must be smooth and cannot
have any witness marks where the wire approaches the interior wall. So, instating offset
and taper in the dummy move insures that the proper taper and offset will already be
initiated when the wire makes its first move to the actual surface of the part to cut.
Second, the arc in and arc out movements to and from the die surface also insure that
there will be minimal witness marks in this area. The wire will form a smooth approach
to the first surface to cut.
Some operators will approach straight to the first surface to cut, go all the way around the
die, and over travel the approach point by .050 inch or so. While this does approximately
the same thing as arc in and arc out there may be witness marks in the approach area,
since the wire will be attempting to recut the .050 over travel area.
Blocks N070 and N075 are necessary (especially for heavier parts) to allow the operator a
chance to apply clamps, magnets, or glued tabs on the slug that is going to fall when the
part is cut off.
These techniques are also explained during the program formatting section of the course.
To Next Page
Loading...