Toledo PWi Forging User Manual page 72

5) Place the Load Cells in the Correct Position in the Press
A)
All load cells should be equal distance from the sides and front and rear. For example, 12" from the
sides, 10" from front and rear. Load cells are typically placed at each corner of the press's bed.
B)
Cycle the press without hitting the load cells first.
C)
Place cardboard on the top and bottom of the load cells.
6) Cycle the Press
A)
While still in the Calibration menu, push
B)
Further adjust the shut height so that the press impacts the load cells and generates a load at 100%
of press capacity. See warning below.
WARNING
:
Depending on the press capacity and the size of the load cells being used, loading the press at capacity
with load cells could indent the ram or bolster. To prevent this situation from happening, do one of the
following:
a) Calibrate the press only up to 80% of capacity, or
b) Use larger load cells to increase the loading surface. For instance, to calibrate a 400 Ton
press at capacity, use (4) 250 Ton load cells instead of (4) 100 Ton load cells.
7) Gather, Record, and Enter Data
A)
Record the load cell numbers for each of the channels. These are the load values of the press
corners.
B)
Record the peak tonnage values from the PWi Forging.
C)
While still in the Calibration menu, push
the PWi Forging's shunt. Record the Gain numbers.
D)
Use the following formula to determine the new gain number:
New Gain Number = (Load Cell reading ÷ Peak Tonnage reading) x Current Gain
E)
Repeat the calculation for each channel.
Doc #17663 Rev A
to display the PEAK tonnage
or
or to display the GAIN numbers. This enables
Toledo Integrated Systems
PWi Forging User's Manual
.
Page 70