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Power requrements, replacing stock

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Posted · Power requrements, replacing stock


As i have made myself a hot bed, i need to do somthing about the power system.

Right now i have a psu supplying 12v to the hot bed, and the stock 19v supplying the printer itself..

now, what is the power requirements and do someone have a pointer to a good psu for the job? 19v.

I failed to take in account the power draw from the hotbed, as i dont have a dc ampermeter, im going to check it with a home watt meter when i return home.

Thanks in advance for any usefull input :D


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    Posted · Power requrements, replacing stock

    A simple multimeter is enough to estimate the power draw: measure the resistance of your heater:

    Watt= Volts*Volts/Ohm


    Thats is a good and valid point.. il do that when home.

    I still need to measure the total power used so i can get a power brick that could supply atleast 140% of what i need..


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    Posted · Power requrements, replacing stock

    so in theory i could hook up the hot bed with the same power supply?

    This is an interesting development.

    So if the heated bed is under 40w. oh the simplicity.

    Somewhere i read that a psu around 80% workload is a happy psu.


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    Posted · Power requrements, replacing stock

    I am using a Chinese 400W 24v PSU from eBay, which has a trimmer to adjust the voltage down to 19v. This is driving the Ultimaker with a reprap PCB heater attached, It draws about 300W when warming up, then ~120W whilst running.

    The heated platform is just connected to the existing MOSFET output, no relays or anything needed. Works well and is a very simple solution comapred with some!


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    Posted · Power requrements, replacing stock

    Hmm, that is alot of wattage, gues il better find me one of those myself :D

    But first il try to run it on a 12v Psu, and make some measurements..


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