Duet 3 - wiring Mosfet for heated bed for CR-10 Max
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Hi Guys,
I am upgrading my CR-10 Max with a Duet 3 board and I am having a little trouble wiring up my heated bed. The CR-10 Max has two separate 24V power supplies, a larger one for the hotbed with a mosfet, and a smaller second supply for the rest of the printer. What is the best way of wiring my Duet 3? Currently, I have the smaller power supply connected to the power in terminals and the mosfet connected to the power out 0 (out) terminals, with nothing connected to the power out 0 (in) terminals. The heated bed doesn't turn on, presumably because nothing is connected to the out 0 (in) terminals. What is the best way to wire this, should I be taking a different approach and trigger the mosfet by using an output header?
Thanks in advance.
Regards
Paul
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@akayoshi said in Duet 3 - wiring Mosfet for heated bed for CR-10 Max:
The heated bed doesn't turn on, presumably because nothing is connected to the out 0 (in) terminals. What is the best way to wire this, should I be taking a different approach and trigger the mosfet by using an output header?
Connect your larger dedicated power supply for the bed to the out_0 (in) terminals and connect the bed to the out_0.
You won't need to use an additional external moset.
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@phaedrux
Just for other's reference, when I connected the heatbed power supply (CR-10 max has a really large heated bed) to the OUT_0 in it blew the fuse.I ended up rewiring the mosfet and just using the Out_2 to signal the heated bed.
Cheers
P
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@akayoshi Wow, ok, I didn't fathom how large that headted bed was. I'd never heard of the CR-10 Max before. Looking at it I see the bed is a 24v 750W DC heater. That's a lot larger than I had expected. Sorry about that.
That's a 32Amp load, (750w/24v). The onboard bed heater mosfet is rated at 18A.
Sorry for leading you astray, I should have asked for the bed heater wattage/amps/volts.
