I have a few chassis-mount resistors mounted to an aluminum block =20
specifically for the purpose of heating the aluminum block (3D printer =20
extruder head).  Can't I run much more power (than rated) through the =20
resistors, as long as I don't exceed the max operating temp?

Specifically, the resistors are 5-ohm 10W, and if I power it from 12V =20
(lead-acid battery) I get 2.4A per resistor, and 28.8W.  I would PWM =20
it to reduce the average power, but with feedback.  So it would run at =20
28.8W until it comes up to temp (I need <150 deg-C), then reduce =20
average power.  The resistors are rated at 250 deg-C max, so I'd be =20
well within that.

Cheers,
-Neil.


--=20
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