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Hi,

so you have the weight, you have the thermal capacity, you have the temperature rise rate --> then you may calculate the required power

Additionally you will need power for

* thermal loss to the environment (thermal conductivity, radiation..)

* power required for the thermal reaction (may be negative)

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I guess what  for the application is important is the temperature of the mold.

So is your temperature sensor placed inside the mold?

If not: What temperature deviation do you expect between thermocouple and mold inside?

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there is:

* ON/OFF control and

* angle control

This are two different modes. Never heard about "ON/OFF angle control".

Klaus