I'm looking at the MK1 heated bed and I'm trying to figure out what Prusa meant when he said it is easily converted to 24v.
Current = Voltage / Resistance
Power = Voltage * Current
With a 12v power supply and 1.2 ohm heated bed, current = 10A and power = 120W.
With a 24v power supply and 1.2 ohm heated bed, current = 20A and power = 480W.
So I need a much larger power supply for 24v, and it seems like I might start tripping breakers!
1. Is this the right application of Ohm's law/the power law?
2. What is physically different about the MK2b heated bed that allows it to run 24v? It is spec'd for 3.4 ohm, so current=7A and power=169watts.
3. Is there a way to modify the MK1 to increase its resistance so I can run 24v at a lower power level?
Current = Voltage / Resistance
Power = Voltage * Current
With a 12v power supply and 1.2 ohm heated bed, current = 10A and power = 120W.
With a 24v power supply and 1.2 ohm heated bed, current = 20A and power = 480W.
So I need a much larger power supply for 24v, and it seems like I might start tripping breakers!
1. Is this the right application of Ohm's law/the power law?
2. What is physically different about the MK2b heated bed that allows it to run 24v? It is spec'd for 3.4 ohm, so current=7A and power=169watts.
3. Is there a way to modify the MK1 to increase its resistance so I can run 24v at a lower power level?