LINK Systems Omni II Automatic Setups Module - Manual (Page 64)

October 16, 2008 Manual Version 1.1
A-2
Set the Min. Pressure to 25. Per the specifications listed this is the required pressure when there
is no die attached to the upper ram.
Set the Tolerance to 2 psi.
Set the Fault Time to 20 seconds.
Set the Transducer Full Scale to 200 psi. Per the specifications listed, the pressure transducer
that we are using has a full scale rating of 200 psi.
Finally, we go back to the Mode line and set the Mode to ON.
See section 5.2 for operation details.
Section A.2 Example Cushion Configuration
This example assumes the cushion system has been wired to the option board at “AS2". First,
some information needs to be gathered.
From the press manual or cushion information plate we find that the effective area of the cushion
is 100 square inches and the maximum operating pressure is 90 psi. This means that the cushion
will exert 100 pounds of force for every 1 psi of cushion pressure (100 square inches * 1 pound
per square inch). We also found out from experimentation that is takes about 3 psi to initially
move the cushion, and that the cushion just starts to fall at 2 psi. This tells us that approximately
2 psi is required to overcome the weight of the cushion piston and pressure plate.
The pressure transducer installed on the system is a Setra model C209 that has a pressure range
of 0 to 200 psi and an output of 4 to 20 ma.
Now we go to the “Auto Sets” screen and with the RUN/PROG switch in PROG hit the
CONFIGURE softkey.
Since the cushion pressure transducer and valves are wired in at “AS2", move the cursor to Air
Slot 2. Press the CHANGE SETTING softkey. From the pop-up menu, select Cushion 1 by
moving the cursor to Cushion 1 and pressing the SELECT softkey. We have now told the
Automatic Setups module that Air Slot 2 is to control a cushion. We must now configure all the
parameters associated with Air Slot 2 for the particular cushion and pressure transducer.
Press the CONFIGURE SYSTEM softkey. The Cushion 1 Configuration menu will appear.
Temporarily set the mode to OFF. We will change this after all other parameters are set.
Set the Display Force As to lbs.
Set Max. Cushion Force to 8800 lbs. Remember that for every psi the cushion will generate 100
pounds of force. Since the maximum pressure is 90 psi and 2 psi is used to overcome the
cushion weight, the max force will be (90 psi - 2 psi) * 100 square inches - or 8800 pounds. Of