OM-281136 Page 44
7-9. Adjust Limits
Figure 7-16. Adjust Limits Screen
Sometimes the heating control loop may not be optimized for the size or material of the part being heated. The Power (KW), Current (A) and
Voltage (V) limits can be reduced on the Adjust Limits screen in the System Menu. This will result in less power to the part and a longer time to
temperature.
An example of when to use this is on a small diameter pipe:
−
Induction heating occurs below the surface of the material and the heat is conducted throughout the rest of the material thickness. In some
cases, the amount of power going into a small amount of material may heat the part faster than the heat can transfer to the temperature sensor.
By the time the temperature sensor reads the target temperature and stops output of the heater, the amount of heat in the part may result in
temperature overshoot.
−
Reducing the machine limits will slow down the heating and minimize temperature overshoot.
1. Press the
[Menu]
button.
2. Highlight [Adjust Limits] with the
[Up/Down Arrows]
.
3. Press
[Select]
.
4. Follow these steps to change limits:
A. Press
[Up/Down Arrows]
to scroll through the list of parameters.
B. Press
[Decrease -]
and
[In]
to adjust the values of each parameters.
To set all limits back to maximum:
A. Press
[Reset Default]
to set all limits back to maximum.
