Hi!
I have had a Mini 2 since about the time they came out. Super reliable, a real joy to run.
However, I am now having the bed thermistor problem that so many have had before
https://forum.lulzbot.com/t/thermistor-going/4001
https://forum.lulzbot.com/t/lulzbot-mini-erratic-temperature-readings/5956
https://forum.lulzbot.com/t/mini-bed-temp-control/21987
https://forum.lulzbot.com/t/got-the-mintemp-error-blues/21427
I get it, the likely problem is the thermistor wire.
My question here is, is there any useful guide that will help me address this problem without taking the whole printer apart?
I suppose I could just snake some new wires in alongside the originals and snip the old out… but looking for a more elegant hack/replacement.
The cable chains have the snap-in crossbars, so it’s easy to run a new wire in there if you need to.
I ran my own segment of CAT-6 networking cable that I use for the BLTouch, and it only took about 10 minutes. Would have been faster, but I wanted it done nicely, and it doesn’t get much more elegant than that.
Well, I did it. I snipped off the old and stringed a new wire pair through the cable harness.
In the past, I had made adjustment to the male connector end. Bending the pins on the bed end of the line slightly to make a more positive connection. This is my first time into the electronics box of my printer, and I noticed while I was working this out that the B THERM connection to the board was feeling kinda janky. So, I did the pin bend on that connector end (the male side on the PCB) and it seemed to make a better mated feeling. I kept a pigtal with the connector on the control board side, and wire nutted my new cable to it.
After all of this, I am running a print and the bed temp trace on octoprint is smooth and steady!
I really don’t think that there is an issue with the wire. I think the issue is with the connectors. I think y’all are using sub-standard connectors. Pass that up the chain of command if you can.