Wire EDM Machine Operation Chapter 10
Copyright November, 98 Page 10-10 Sodick Inc.
machine’s position relative to the limits of the machine. If you are going to be running a
lengthy job and you are worried about the power in your shop going off, you can use this
technique to assure your ability to easily get back to your program’s starting position.
We have reserved coordinate system number G959 for this purpose. Every time you start
the machine, you must send the machine to its negative limits (this is part of machine
startup.) While the machine is at its limits, the X ,Y,U,V and Z displays for coordinate
system number G959 should be zero.
Move the machine to its starting point for the program (using whatever techniques are
necessary.) BEFORE you run your program, look at coordinate system number G959 and
write down the X and Y values. This will be the distance from the machine’s home to
your start point. If the power goes off during the machining of your part, you will be able
to easily send the machine back to the start point. Follow the steps below.
Power up the machine.
Go to machine home limits by doing G81X-Y-.
Switch to work-coordinate G959.
Then command a G00 in MAL, MDI back to the numbers you wrote down before.
USING COORDINATE SYSTEM SHIFTING TO COMPARE MEASUREMENTS
When it is critical that you make edge-find as perfectly as possible, it is sometimes wise
to repeat the edge-find results and compare for accuracy. You can make the edge-find
find in one coordinate system (G54 for example) and zero the axis display, and then
switch to another coordinate system (G55 for example) and repeat the edge-find. Press
the F4 key and look to see the difference in the zero position of G54 when you’re done.
To compare center finds:
Type the following in MDI
G54 Q0145
G55 Q0145
And press Enter
When the center finds are done, press the F4 key to compare the difference between the
G54 and G55 work coordinates.
M
M
I
I
R
R
R
R
O
O
R
R
I
I
M
M
A
A
G
G
E
E
A
A
N
N
D
D
A
A
X
X
I
I
S
S
E
E
X
X
C
C
H
H
A
A
N
N
G
G
E
E
These features allow the program to be written in the most convenient way. Then if the
part is setup differently than the way it is programmed, you can rotate or mirror the
program to match the way the part is setup, instead of breaking down the setup. This can
be a little confusing so always dry run the program prior to actually cutting your part to
be sure it will come out correctly.
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