Wire EDM Machine Operation Chapter 1
Copyright November, 98 Page 1-12 Sodick Inc.
4) The number of passes you desire around the workpiece. This choice has to do with
the accuracy and finish requirements you desire. The more passes made, the better the
finish and accuracy. You will notice that if you intend to make only one pass, that there
are several choices for “first cutting only” in the manual.
We must point out that it would be impossible for Sodick to document the conditions and
offsets necessary to machine every conceivable material. If you find that the material you
intend to machine or wire diameter you intend to use is not included in the condition
manual, you should contact Sodick to obtain their recommended conditions and offsets.
Note: There is also available “cheat sheets” that take information from the condition
manual and condense it into several sheets for operator convenience. These sheets are
distributed during the 1 week training course. If the machine has EF II circuitry (AC
circuitry) and you want to use it, there is also “cheat sheets” for using EFII.
SURFACE FINISH EXPECTED
The required surface finish will determine the number of passes needed. Here is a chart
that gives the general relationship between surface finish and the number of passes
required for hardened D2 material.
Standard Machine Equipped with EFII
CUT RMS Micro Inch CUT RMS Micro Inch
1 100 1 100
2 70 2 90
3 40 3 15
4 20 4 8
M
M
O
O
R
R
E
E
O
O
N
N
T
T
H
H
E
E
E
E
D
D
M
M
P
P
R
R
O
O
C
C
E
E
S
S
S
S
As you can see, there are many factors that contribute to the EDM process. It would be
impossible for beginners to memorize each factor. One of our goals in this class will be to
teach you how to determine what cutting condition to use and what parameters are
changed most often, then you can fine tune the previously developed conditions to your
liking. But you will not be left to develop new conditions on your own. You can
reference the Sodick condition manual or call the applications department for help.
Another point to make is that all of these factors work together to form a good cutting
condition.
"( = ON OFF IP HP MA SV V SF C WT WS WP WC);"
"C001 = 007 011 117 002 14 018 3 0020 00 000 000 000 000;"
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