Wire EDM Machine Operation Chapter 8
Copyright November, 98 Page 8-14 Sodick Inc.
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CALIBRATING T-UPPER AND T-LOWER
If you are not cutting accurate taper angles, it is possible that the constants called Table to
Limit and Table to Lower in the SET screen need to be changed. There are programs
called Taprdata or Tdstrok3 or Tdstrok located on your User Disk or Harddrive. These
programs will calculate the 2 constants. Locate one of these program names and load the
program into memory then follow the instructions at the beginning of the program. It is
wise to do a test cut after this procedure is done, to verify that the machine is now cutting
accurate taper angles. This is a procedure that is not done very often. If a different wire
guide is installed, you may want to run one of the programs mentioned above to
recalculate the constants.
NOTE: TAPRDATA is the latest program to date as of Feb. 1998.
FLUSH NOZZLES
The standard flush cups have a 6mm I.D. and are used when cutting up to 10° taper. If
11° to 20° is being cut, flush cups with a larger I.D. (10mm) should be used. If 21° to 30°
is being cut, flush cups with a larger I.D. (12mm) should be used. Verify by dry running
the machine, that the wire does not contact the edge of the hole on either flush cup. A
mirror may be needed to check the upper nozzle.
0 to 10° 6mm Lower (3081674) 6mm AWT Upper (3081604)
11° to 20° 10mm Lower (3081675) 10mm AWT Upper (3081606)
21° to 30° 12mm Lower (3081867) 12mm AWT Upper (3081868)
WIRE TYPE CONSIDERATIONS
At steep angles, if there are lines on the part from wire vibration, try using a soft wire like
Gisco Mega cut W, or Gisco Berco cut 390 to eliminate the lines. These wires have more
elongation and will flow through the wire guides better at taper angles of more then 10
degrees.
CONVERTING TO DECIMAL DEGREES
To convert the minutes and seconds of an angle given in degrees, minutes, seconds to the
decimal equivalent (without this function on your calculator).
Decimal equivalent = [Min / 60] + [Seconds / 3600]
GRAPHICS COLORS
When drawing or viewing the graphic picture of a program with taper, the screen will
show 2 colors. While running a taper program, there will also be 2 asterisks following the
graphics drawing.
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