Prusa i3 a pro. Ribbon cable melting

[peterelkjaer123]

Hello,

I resently purchased a prusa i3 a pro. Now the 30 pin ribbon cable between the control box and printer has started showing signs of heat damages on the insulation.
As far as I can see the 30 pin cable is supplying power for the hotend and heatbed. Is that correct? If this is the case, is the cable then too poorly dimentioned for that kind of current draw?

Furthermore i can't get the heatbed above 70 degrees. Is there by any chance any heavier ribbon cables on the market that can stand that kind of power draw?

Kind regards and best wishes of a nice day
Peter

[William]

Hi,as to the hotbed issue,I wanna know about the resistanc of your hotbed, which is usually 1.2-1.5ohms,.If it's too high then the temperature won't pass 70 degrees,please check this link:http://www.geeetech.com/forum/viewtopic ... 13&t=17039.

[peterelkjaer123]

Thank You so much for your fast reply.
I have already messured the resistance in the heatbed to 1.1 ohm but forgot to mention it in my first post. Sorry about that
I have taken a picture of the ribbon cable if the location of the burned wire can give you an idea of where exactly the problem is

WIN_20170523_08_47_45_Pro.jpg (631.12 KiB) Viewed 7192 times

Kind regards
Peter

[William]

Wow,It looks serious actually.I suggest you to buy a new one to replace it.

[peterelkjaer123]

Another picture that is a little better

IMG_20170523_085550[15].jpg (419.34 KiB) Viewed 7189 times