Sanguinololu 1.3a Head bed
Re: Sanguinololu 1.3a Head bed
The board was attached to the frame with capacitor and MOSFETS directed to the fan.
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zhangxueyou
- Posts: 1405
- Joined: Fri Feb 06, 2015 1:33 pm
Re: Sanguinololu 1.3a Head bed
Is the hotbed fine? What is the resistance of it? Normally, it is about 1.2 ohm.4x6hp wrote:The board was attached to the frame with capacitor and MOSFETS directed to the fan.
Re: Sanguinololu 1.3a Head bed
The hot bed resistance is 0.9 Ohm.
The current drain for the hot bed is about ~13A.
The power supply is 15A.
I did not measured the resistance for extruder heater. But i think what 3A is not enougth for extruder, all of motors and rest of electronics.
The current drain for the hot bed is about ~13A.
The power supply is 15A.
I did not measured the resistance for extruder heater. But i think what 3A is not enougth for extruder, all of motors and rest of electronics.
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zhangxueyou
- Posts: 1405
- Joined: Fri Feb 06, 2015 1:33 pm
Re: Sanguinololu 1.3a Head bed
When testing at the 2 ends of hotbed wires, the resistance is 1.2 ohm, so the current is about 10A.
The resistance of extruder is around 4.2 ohm, so the current is 3 A, it is enough for heating the nozzle.
We use 12V output voltage, so higher voltage may burn the board.
The resistance of extruder is around 4.2 ohm, so the current is 3 A, it is enough for heating the nozzle.
We use 12V output voltage, so higher voltage may burn the board.
Re: Sanguinololu 1.3a Head bed
In this case, the 15A power supply is enougth.zhangxueyou wrote:When testing at the 2 ends of hotbed wires, the resistance is 1.2 ohm, so the current is about 10A.
The resistance of extruder is around 4.2 ohm, so the current is 3 A, it is enough for heating the nozzle.
We use 12V output voltage, so higher voltage may burn the board.
In my case, the hotbed resistance is 0.9.
What is my next step to solve the problem? Do i need to contact with technical support?
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judykelvin
- Posts: 1
- Joined: Sat Mar 12, 2022 12:39 am
Re: Sanguinololu 1.3a Head bed
Ok, well first off, the blue part is right next to the fan. Second, this happens as soon as I turn the printer on.
I haven't told the printer to heat the bed yet through the lcd or my computer, it is just heating itself.
Second the mosfet gets so hot so fast that it has started to smoke and I promptly turned it off so that I don't completly burn up another sanguinololu board.
I also have a second problem. With the heat bed disconnected so that I don't fry another board, the x,y,z axis all move perfectly.
But the Extruder Motor does not.
It sound jittery and seems to just rotate a click back and forth, not really spinning in either direction.
I haven't told the printer to heat the bed yet through the lcd or my computer, it is just heating itself.
Second the mosfet gets so hot so fast that it has started to smoke and I promptly turned it off so that I don't completly burn up another sanguinololu board.
I also have a second problem. With the heat bed disconnected so that I don't fry another board, the x,y,z axis all move perfectly.
But the Extruder Motor does not.
It sound jittery and seems to just rotate a click back and forth, not really spinning in either direction.
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elliotsmith951
- Posts: 1
- Joined: Wed Jul 06, 2022 5:51 pm
Re: Sanguinololu 1.3a Head bed
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