24v Heatbed with 12v everything else
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@djdemond 200W / 8.33A 24V heat bed, 350W / 14.6A 24V PSU
..Just realized, the mosfet is 12V. Or at least that's what the Amazon page says. But if I google for 24V mosfet I'm not getting any useful results.. Amazon page also claims it can handle 25A.
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@vaei 12V sounds Odd for a mosfet rated to handle 25A and in that package. A little bit of investigation:
DG210N06 is the model number - you can buy them off aliexpress etc. I cannot find a datasheet for them anywhere!
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@t3p3tony If I don't have it on hand I'll just do it the previous way. Aliexpress takes at least 2 weeks to ship to me and I have everything else ready to go.
Edit: Sorry I completely misunderstood what you were saying. I googled around and couldn't find much either.
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@vaei said in 24v Heatbed with 12v everything else:
yeah basically i think its fine to use this as you plan, switching 24V as long as you get no where near the 24A maximum. but that is based on a guess... no data sheet available.
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@t3p3tony Hm so what would I do about the incredibly slow heating?
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@vaei Insulation?
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@phaedrux I don't get what you're asking
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Put a thermal insulation to the underside of your bed.
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@vaei Something like this
http://www.instructables.com/id/Insulate-Your-3D-Printers-Heated-Bed/
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If you are using PID rather than bang bang mode, then tuning the heater might help to speed things up - depends on what the default PID values are. Another thing that can help is re-positioning the bed thermistor - especially if you have a thickish heat spreader. Often bed heaters have a thermistor built in but what happens is that it senses the temperature close to the heater element which rises quickly, so the heater shuts off early.
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@vaei said in 24v Heatbed with 12v everything else:
@t3p3tony Hm so what would I do about the incredibly slow heating?
Best to confirm that it is the bed that is the issue. As @Phaedrux has suggested earlier you can temporarily connect the bed directly to the power supply and time how long it takes to heat up.
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The bed I bought didn't have a thermistor, so I bought a separate one and I think the issue could also be the values being entered incorrectly. I'll have to measure the coefficients. But.. right now I have no time whatsoever (and sorry for the delayed response), I'll have to get back in a week or so.
