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Modified Gcode to only run the cooling fan while the printer is running
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(08-22-2020, 09:29 AM)Umpa Wrote:
(08-22-2020, 04:43 AM)cliffyk Wrote: My observations were made while printing a model...

Ok, so after the print - you left the vat with resin in it - in place ?

This is important because the resin in the tank might act as a heat soak.
I have thought how I might get the fan to run on for a while after print has finishes.

The resin tank does of course absorb radiant heat from the LEDs, however this would be heat that has already escaped the LED proper, and as the resin/vat have no direct physical connection to the LED array substrate or heat sink, any heat the vat/resin do retain would have little to no effect on the LEDs' core operating temperatures.

its presence would behave as radiant heat insulator for the upper "wall" of the curing light chamber; which without ventilation would serve to elevate "ambient" temperatures within the light chamber; which in turn could impact the running temps of the LED array. However with the relatively large volume of air moving through the light chamber (fan on) I cannot envision the resin/vat presence having any but a minimal impact on LED core temperatures.

With the OEM settings the cooling fan is on whenever the printer is powered up--I do not view this as a bad thing unless you are the sort to fret over every last milliwatt¹ or are concerned about the cooling fan's longevity; and in this case that concern would be at the expense of the printer's electronics and LED array useful life.

Again, and at the risk of sounding like a broken record, sometimes OEM engineers do know what they are doing...

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¹ - I have seen mention of concern over the fan's noise level, however were I in a situation that its slight sound were a consideration I would find it cycling on/off to be more annoying than its being on continuously.
-cliff knight-
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RE: Modified Gcode to only run the cooling fan while the printer is running - by cliffyk - 08-22-2020, 10:59 AM

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