Heat Bed issues

So I was having issues with my bed not getting up to temp so I thought that I was victim of the issues that others are having with the board getting to hot. But I noticed that my bed actually was heating up it just wasn't registering with the computer. The computer would say 20*-30*c but my infrared thermometer was reading closer to 60*-70*. ? So I started inspecting things and theres a little glass "ball" hooked to 2 white wires that was just hanging out. so I pushed that against the bed and it started registering a higher temp. So my question is where is this "ball" supposed to be attached? I taped to the top of the bed to test it and it would only get up to about 70*- thermometer read about 75* but that's all it would do. Help?

 

not much to see, but here is how mine looks like

 

Is that scotch tape?

 

It should be Kapton tape.

 

I was thinking the same thing, It sure looks like it is. This is not good if it is, the tap will fail and could cause some serious damages. If this wasn't done by the user them self's, I'm guess that is one made in China, I think the RoBo team needs some one down their watching over what is going on. There has been a lot of problems with the printers coming out of china.

 

i didn't do that, at first i thought it was, but i've heated the bed so many times I think scotch tape would have changed color or even burned off. i can check once i get back home

 

That looks nothing like my china made printer. Mine had one piece of kapton.