Wire EDM Machine Operation Chapter 1
Copyright November, 98 Page 1-8 Sodick Inc.
this internally. To obtain maximum speed when rough cutting, lower the A until the cut
becomes unstable then raise it back up one number.
For example, say the MA value is 22. The sensitivity would be quite low, and if a
problem were determined, the off time would not change dramatically. But, if the MA
value is 89, sensitivity would be very high and if a problem were determined, the off time
would be increased a great deal until the problem was resolved.
MA is just part of the adaptive control system. If the problem were not overcome with
MA, the next stage of adaptive control would kick in. The wire will back up along the
programmed path a given amount. If the problem cannot be resolved by this action a
short circuit alarm will appear. If the problem is solved, the control would try again in the
forward direction.
MA is one of the factors that takes power away from the wire.
HP
Parameter Range: (H : 00-99 P : 0-4)
The H (first two digits) of HP is a high voltage circuit used to increase the open gap
voltage. You may find this being used on workpieces thicker than 7 inches, especially for
the skim cuts. The A320D machines do not have this circuit because the thickest part that
can be cut by the A320D is 7 inches.
The P of HP (last digit) is the output ON TIME if DC arcing occurs. This is used when
MA parameter senses the cut is unstable. Increase this value to add more power to the
wire to cut faster.
IP
Parameter Range: (000-017) EF2 (000-117)
“IP” stands for Current Peak (I is the electronic symbol for current). IP controls the
amount of amperage (current) that is applied to the wire. The higher the number the
greater the current.
IP is one of the factors that adds power to the wire. As with on time, the higher the IP, the
faster the machining will take place, but accuracy and finish will suffer.
You will always see in the condition manual that on a rough cut IP will be set to 17. The
1st skim cut IP will be set to 16. Normally this is not adjusted during the cut. IP 16 & 17
is the high speed machining circuitry.
IP 1-15 is used for skim cuts #2 and #3. This amperage is a lot lower and can only
remove approximately .001" of material at most.
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