Toledo PWi Forging, Руководство пользователя

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PWi Forging User’s Manual
Doc #17663 Rev A Page
Toledo Integrated Systems
56
Learn Menu

The Learn menu provides a way to control the method that is used to calculate the
high and low setpoints when the Learn function is used.
To change the setpoint learning method
1) Push to enter change mode. Current setting is then selected.
2) Push or to change the setting.
3) Push to accept the change, or push to cancel the change.
Choosing a setpoint learning method
While either method can be chosen, it is important to understand how the setpoint learning
method will affect the high and low alarm setpoints. As a general rule, choosing to learn
setpoints based on a percentage of capacity will generate a larger range of “good” load
values than choosing to learn based on a percentage of the benchmark. This effect is more
evident if your normal running peak load is relatively small compared to the capacity.
Consider the following example:
A 200-ton capacity press is making good parts at 50 tons. If the high and low setpoints are
set to 20%, the following setpoints will be calculated after the Learn function is used.

%Capacity method: 200 tons * 20% = 40 tons
Hi Setpoint = 50 tons + 40 tons = 90 tons
Lo Setpoint = 50 tons – 40 tons = 10 tons

%Benchmark method: 50 tons * 20% = 10 tons
Hi Setpoint = 50 tons + 10 tons = 60 tons
Lo Setpoint = 50 tons – 10 tons = 40 tons
In this example, choosing the %Benchmark method will produce a much tighter range of
good values (20 tons) than the %Capacity method (80 tons).