temperature issue

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Mukhtar
Posts: 4
Joined: Thu Apr 02, 2015 2:35 pm

temperature issue

Post by Mukhtar » Thu Apr 02, 2015 4:02 pm

Hi,

I tried to test the hotbed and extruder but on increasing their temperatures, the control board started giving out smoke and the heatbed wires lost their stiffness. Is it that I did not connect the wires correctly? Or is it normal? My control board is Arduino Mega 2560, the hotbed wires were connected to D8 and the Extruder heat wires connected to D9. Moreover, is there a calibration method I can use for the printer to familiarise itself with its position? And finally, what default values should I use for X, Y and Z axis (Min and Max displacements).

Thank you very much.

zhangxueyou
Posts: 1405
Joined: Fri Feb 06, 2015 1:33 pm

Re: temperature issue

Post by zhangxueyou » Thu Apr 02, 2015 4:29 pm

1. Extruder is connected to D10.
2. The printer knows the its position correctly if it is home intially.
3. Displacement: 0-190mm for x, 0-200mm for y, 0-140mm for z.

Mukhtar
Posts: 4
Joined: Thu Apr 02, 2015 2:35 pm

Re: temperature issue

Post by Mukhtar » Thu Apr 02, 2015 4:44 pm

I have re-fixed the extruder wires to D10 thank you. Will it also take care of the smoking issue from the board?

zhangxueyou
Posts: 1405
Joined: Fri Feb 06, 2015 1:33 pm

Re: temperature issue

Post by zhangxueyou » Thu Apr 02, 2015 4:46 pm

Please turn the printer off. Which part smokes? Please take a picture of mainboard and highlight that part.

Mukhtar
Posts: 4
Joined: Thu Apr 02, 2015 2:35 pm

Re: temperature issue

Post by Mukhtar » Thu Apr 02, 2015 4:54 pm

I was reading another person's forum, it seems to be from the position of the MOSFET in front of the D8 terminal. It isn't burnt up so I can't show you specifically.
"Re: RAMPS board smoking" is the forum I am talking about. And finally, can I use the coordinates you just gave me for defining the home position? And would that be X(min) Y(min) and Z also (min)?

Mukhtar
Posts: 4
Joined: Thu Apr 02, 2015 2:35 pm

Re: temperature issue

Post by Mukhtar » Thu Apr 02, 2015 5:23 pm

Here is the picture, I also want to ask for suggestions on how to rotate the board with the fan having direct access to cooling the ramp terminals.
Attachments
1000.jpg
Smoking zone on board
1000.jpg (210.52 KiB) Viewed 9680 times

abulafi
Posts: 15
Joined: Tue Mar 17, 2015 12:34 pm

Re: temperature issue

Post by abulafi » Thu Apr 02, 2015 10:02 pm

My solution to this is to mount a heat sink with fan of an old video card to the MOSFET. Ugly, but works.
IMG_20150402_170114.jpg
IMG_20150402_170114.jpg (181.98 KiB) Viewed 9657 times
IMG_20150402_165212.jpg
IMG_20150402_165212.jpg (207.51 KiB) Viewed 9657 times

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