Working through a hand full of issues with a new TAZ. Got most of the undercontrol. Now down to the last big one…
It seems that when I try to heat my Bed, that it doesn’t heat correctly. Now let me be more specific.
if I set it for 110C for ABS, it will heat to 85C and then it will start to cool, and never return to 85, it will then moderate to a around 65.
But there’s more. I first thought it was a power supply issue, so I hooked up an external thermocouple to the bed and watched what it was doing. In fact, it’s heating way hotter than 85 or 65.
Now I don’t know which the issue is. Is there a problem with the Rambo not detecting the bed thermocouple correctly (wrong component on the board somehow), or is it a bad thermocouple on the bed? If that later, I have no idea how to replace that as there is a mat that is attached to the bottom of the glass and the thermo couple is embedded in red RTV in that mat.
Also note, that with an IR temp gun, the bed is indeed hotter than the the Bed thermo thinks it is… At the moment, I’m suspecting the thermo in the bed as the likely hood of the Rambo being bad is pretty remote.
I wonder is there any way to plug the thermo into one of the other inputs on the Rambo just to verify that part? The nozzle works just great, but I’m having to play games with the bed at the moment to make things work…
Any thoughts from anyone?