Lots of problems

[efste]

Hello i purchased the Acrylic Frame 3D Printer I3 via e-bay,
http://www.ebay.com/itm/Acrylic-Frame-3 ... AQ:US:1123

First of all while i followed all the instructions u gave me when i finished with installing
the drivers and the firmware (with all the necessary settings ) and activated the 3d printer
like 15 seconds later both fans got burned and that was the least ... when i decided to preheat the nozzle and the bed to print my first item
nozzle got on fire (cables and the tape ) in like 3-4 seconds ( the temperature on the monitor hitted 200 *C and thats too much in 4 seconds even without a fun ) and also the connections of the board
that connects the bed was start smoking ... so i shut it down immediately ... when i re-activated the printer nozzle wasnt heating at all ! The following pictures are the evidence of what happened
and the way i connected the board and the power supply ...

nozzle

11356249_10205667575981925_438287891_n.jpg (68.57 KiB) Viewed 10279 times

mosfet burned

11637935_10205667576261932_299831713_n.jpg (68.74 KiB) Viewed 10279 times

sanguino connections

11297755_10205667576421936_550654609_n.jpg (85.71 KiB) Viewed 10279 times

power supply

11349824_10205674110225277_231177557_n.jpg (57.46 KiB) Viewed 10279 times

waiting for ur reply !

[zhangxueyou]

Do you have a multimeter?
Please unplug the heating wires, test the resistance of extruder heating wire (about 4.5 ohm) and hotbed(1.2 ohm) .

extruder heating wire.jpg (43.95 KiB) Viewed 10278 times

test hot bed resistance1.png (395.11 KiB) Viewed 10278 times

[efste]

Hello ,

i tested both of them , the extruder wasnt responding at all as u can see in the photo

extruder

11666946_10205797817157873_1660559768_n.jpg (49.73 KiB) Viewed 10270 times

and the bed stabilised at 1.9

hotbed

11701362_10152838541675946_705386763_o.jpg (82.96 KiB) Viewed 10270 times

[zhangxueyou]

Somewhere of the extruder heating wire must be broken, because the resistance you get is infinitely great, please check the wire.
Please make sure the cooling fan is working for the mosfet, without the fan, the mosfet will burn too.
And please check somewhere of hot bed is short circuit, short circuit will lead to extremly high current and the mosfet will be burnt immediately.

[efste]

Hello, u had right the heating wire must be broken inside the hotend because when i metered the cables individually i actually had a mesurement

1st cable

11696775_10205807146711106_208852609_n.jpg (59.5 KiB) Viewed 10257 times

2nd cable

11714352_10205807147071115_436681642_n.jpg (69.62 KiB) Viewed 10257 times

so i guess it needs replacement,

about the fans as i told you both got burned the first time i opened the 3d printer in like 1 minute of working time.

And last how can i check if the hotbed is small cirquit ? since the resistance of the cables are ok it shouldnt smoking and from what i am reading in ur forums there are a lot of people having this problem so maybe its the quality of the mofset contacts ?

[Robo Techy]

So Extruders temp issues, here is my fix:
Once I got the basic frame together (still with issue, but all together) I started on the electronics. Here during wire routing inspections, I found the extruder temp sensors leads were touching the extruder bulkhead. I had to take it apart and add Heat Resistant Kapton Tape on the leads. You will need Kapton tape if you do this fix! Maybe you can find better way too! Then I found one lead that was not crimped tight and pulling out. Simple fix with a crimper. When I put it back together, I added some silicone heat compound in the sensor cavity to improve sensitivity.

[zhangxueyou]

Hello, u had right the heating wire must be broken inside the hotend because when i metered the cables individually i actually had a mesurement

11696775_10205807146711106_208852609_n.jpg

11714352_10205807147071115_436681642_n.jpg

so i guess it needs replacement,

about the fans as i told you both got burned the first time i opened the 3d printer in like 1 minute of working time.

And last how can i check if the hotbed is small cirquit ? since the resistance of the cables are ok it shouldnt smoking and from what i am reading in ur forums there are a lot of people having this problem so maybe its the quality of the mofset contacts ?

Yes, the wire is fine, but the hotend inside is broken.