Wire EDM Machine Operation Chapter 10
Copyright November, 98 Page 10-13 Sodick Inc.
S
S
U
U
B
B
R
R
O
O
U
U
T
T
I
I
N
N
E
E
T
T
E
E
C
C
H
H
N
N
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I
Q
Q
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U
E
E
S
S
We discussed sub-routines during our presentation of program formatting (chapter 9.) We
gave the most useful reasons for using sub-routines, which are to repeat motions for trim
passes in that session. So, our presentation here will be limited to the format of sub-
routines.
When the control reads an M98 with a P word, it jumps to the sequence number specified
by the P word. It continues execution from that point until it reads an M99 command.
Then it jumps back to the command just after the M98 command. If L is included in the
M98 command, the L word tells the control how many times to loop the sub-routine. If
the L word is not included in the M98 command, the sub-routine will be executed once.
One very good application for a sub-routine is to avoid having to re-program trim passes.
This was well presented during our discussion of program formatting in Chapter 9, so we
will not give an example here.
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C
C
A
A
L
L
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G
G
(Input as a 3 place value ex: 1000 = 1 to 1)
Scaling allows you to easily change the size of the workpiece to be machined. With an
easily input scale factor, you can modify the cutting motions to make a larger or smaller
shape. However, you must be careful not to break any rules related to wire radius
compensation. For example if you had an original shape that included .005 inch inside
radii, and you scaled down to half size, the inside radii would now be .0025 and the
original wire diameter would probably not work.
Scaling does not require any program commands. The scale factor is entered into the SET
screen or in the RUN screen. 1000 is equal to full scale (note that no decimal point is
allowed.) For half scale you would set the scale factor to 500, for twice the original size,
you would set the scale factor to 2000 and so on. If the version of software in the control
is 3.00JPY or later you can enter it into the program above the G92 statement.
NC program example “FLAG3D2000” scales the program up twice the size.
Once the scale factor is set, the control will modify all movements by the amount of the
scale factor.
Note: scaling does not effect the offset value. Also, an icon appears in the run screen if
set to a value other than 1000 which is full scale.
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