Duet 3 32v Hotend heaters and fans
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Hello,
I want to supply 32v to duet 3 but cannot find heaters or fans at this voltage. Is it possible to use a 32V to 24V buck converter to power the heaters and fans?
How would it connect to the board?
I had thought of this, which is capable of providing 3A (24 * 3 = 72W)
https://es.aliexpress.com/item/32721507753.html
Thank you!
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the same applies to the heaters https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans#Section_Using_12V_fans_when_VIN_is_24V
(but for the duet 3 i think it provides 12v as an alterntaive to Vin/32, still the above link will show how to connect the dc/dc converter)
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Thank you.
In the case of fans, the solution is simple, but in the case of heaters, there is no jumper to put the voltage of the buck converter.
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Wire the positive wires of 12V fans directly to the buck regulator output, and the negative wires to the FAN- pins of the controlled fan outputs as usual3
do the same for the heaters, wire the positive from heaters straight to dc/dc positive output and make sure dc/dc negative output is connected to 32v negative, and leave the heater negative connected to the heater outputs.
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Ok, thanks
In the example scheme I have seen that the negative output of the buck converter does not connect to anything. It is right?
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@nomad You could possibly use a small wattage 24V heater. For example, if you wanted say 60 Watts then (if my maths serves me right), a 24V 30 Watt heater would have a resistance of about 19.2 Ohms. So feeding it 32 Volts would draw a current of about 1.7 Amps giving about 54 Watts which might be near enough?
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most dc/dc converts are non-isolated, so the negative input and output are already connected; as such no additional wiring needed for the negative side.
which is why i said make sure they're connected instead of insisting to connect them.
