Heating element is causing the 10A fuse to blow

[jaap]

Hi, I have a Geeetech prusa i3 x which I recently finished putting together, but when I set the extruder to be heated, the hot end gets really hot, it starts smoking and causes the 10A fuse to blow, Please help, I haven't been able to even do my first print

[William]

Hi, I have a Geeetech prusa i3 x which I recently finished putting together, but when I set the extruder to be heated, the hot end gets really hot, it starts smoking and causes the 10A fuse to blow, Please help, I haven't been able to even do my first print

Hi,
You'd better change a 10A fuse first,do you have a spare one?

[jaap]

Hi,
You'd better change a 10A fuse first,do you have a spare one?

I have replaced the 10A fuse with a working one and tried it again, but it blew it again. I have an image on how red the wires for the heating element get before it blows, I have also followed this http://www.geeetech.com/forum/viewtopic ... 19&t=17039 and the LED for the heating element turns on which means the MOSFET is good.

The following image is before I start the heating of the extruder

Before heating

extruder (1).jpg (323.58 KiB) Viewed 10891 times

The following image is how hot it gets in a few seconds before the fuse blows

hot before it blows the fuse

extruder-3 (1).jpg (408.46 KiB) Viewed 10891 times

[ggg666]

Hi,
You'd better change a 10A fuse first,do you have a spare one?

I have replaced the 10A fuse with a working one and tried it again, but it blew it again. I have an image on how red the wires for the heating element get before it blows, I have also followed this http://www.geeetech.com/forum/viewtopic ... 19&t=17039 and the LED for the heating element turns on which means the MOSFET is good.

The following image is before I start the heating of the extruder

The attachment extruder (1).jpg is no longer available

The following image is how hot it gets in a few seconds before the fuse blows

The attachment extruder-3 (1).jpg is no longer available

OK,sounds like the mosfet is good,have you measured the resistance of the heater,i guess the value is abnormal and has a overhigh power.

QQ截图20160825101911.jpg (63.48 KiB) Viewed 10875 times

[jaap]

I measured it, and got 2.1 ohms, the way I measured it was I took the two wires of the heating element and made sure they were only connected to the probes of the multimeter and nothing else. I am kind of confused on what it means by testing when shorted it should be less than 2 ohms and when open circuit it is infinite? How exactly do I test that?

[William]

I measured it, and got 2.1 ohms, the way I measured it was I took the two wires of the heating element and made sure they were only connected to the probes of the multimeter and nothing else. I am kind of confused on what it means by testing when shorted it should be less than 2 ohms and when open circuit it is infinite? How exactly do I test that?

I'm afraid you have to change a heater now...

[jaap]

How could I contact costumer service to get it replaced, since it came faulty from factory? I also have a two year warranty on the printer but don't know how the process is to getting it replaced.

[William]

Hi,
Where did you buy your printer?

If you bought it from our site directly,you can contact our sales(sales@geeetech.com) to ask for the replacement,providing your order number.

If not,i'm afraid you've to contact the seller first.