Wintriss autoset 1500, User Manual

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1137200 AutoSet User Manual
4-2 Operation
Percent repeatability tolerance is the percentage of the reference tonnage at which AutoSet
establishes repeatability setpoints. Repeatability setpoints are calculated as follows:
Repeatability setpoint = Highest measured load x repeatability setpoint percentage
Available percent repeatability tolerance settings are: 1%, 2%, 3%, 5%, 7%, 10%, 15%, 25%,
and 50%.
AutoSet samples the load at each strain link simultaneously, selecting the highest measured
load at each strain link as the reference tonnage to use in calculating setpoints. Tonnage is
sampled at two strain links in AutoSet 1500 and at four strain links in AutoSet 1504.
Example: Calculation of High and Repeatability Setpoints in AutoSet 1504 Plus
An AutoSet 1504 Plus load analyzer is installed on a 200-ton press. The percent high tolerance
is set to 15%, the percent repeatability tolerance to 5%, and the sample period to 15 strokes.
The DISPLAY switch is turned to the RESET position and held for at least two seconds to
initiate the setpoint calculation process. The Setpoints displays on the AutoSet front panel
change to 60.0 tons each (i.e., 120% of 50 tons, which is the full-scale tonnage for each corner
of the press). Then, the press is run for 15 strokes.
Graphs displaying the tonnage measured on each stroke at each strain link during the sample
period and the high and repeatability setpoints calculated based on these tonnage samples are
shown in Figure 4-1.
As shown in Figure 4-1, the highest load measured during the sample period on Left Front and
Left Rear strain links is 38 tons, which occurs on stroke 7. The highest load on Right Front and
Right Rear strain links is 30 tons, which occurs on stroke 5. (Highest measured load is shown
as identical on front and rear strain links for convenience.)
Figure 4-1. Setpoint Calculation Example: Tonnage Produced at Each Strain Link