
AutoSet
1500
AutoSet 1500 User Manual
5
Ch 1
1088500
Example of how setpoints are calculated
To better understand how AutoSet 1500 automatically creates setpoints, let's look at an
example. Let's say AutoSet is installed on a 50 ton press. The percent tolerance setting is
at 10%, indicating that AutoSet will create setpoints 10% higher than the highest
measured load during the sample period. The sample period is set to 15 strokes.
The press is started. Then the reset button is pushed and held for at least two seconds.
This signals AutoSet to begin the calculation. It also changes the setpoint displays to 30.0
tons each (120% of 25 tons). 25 tons is the full scale tonnage on each side of the press.
Next, the press is run for 15 strokes. The highest measured tonnage on the left is 16 tons
and on the right is 10 tons. See Figure 1-2.
TONS
11 tons
RIGHT CHANNEL
20
30 tons
10
30
16 tons
17.6 tons
LEFT CHANNEL
0
STROKES
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
30 tons
STROKES
10 tons
1 2 3 4
5 6 7 8 9 10 11 12 13 14 15 16 17 18
20
10
30
0
TONS
Figure 1-2. Tonnage produced at each strain link in example.
Highest load is on stroke 7 for left strain link and stroke 5 for right strain link. Tonnage
at far right on each graph is setpoint calculated by AutoSet after sample period.
Instantaneously after the 15 stroke sample period ends, setpoints are calculated as follows:
The setpoint for the left strain link is:
16 tons + (16 tons x 10%)
or
16 tons + 1.6 tons
or
17.6 tons
The setpoint for the right strain link is:
10 tons + (10 tons x 10%)
or
10 tons + 1 ton
or
11 tons
These setpoints are now shown in the setpoint display.
LOAD
SETPOINTS
RESET
17.6
11.0
15.1
9.6
RIGHT
LEFT
Figure 1-3. Setpoints AutoSet created in example.