SoliForum - 3D Printing Community — Ruined my thermistor??

Re: Ruined my thermistor??

2016-01-21T09:37:35Z

The stock thermistor is 100k, same as the E3D.
Go for it with repetier, you won't regret it.

Re: Ruined my thermistor??

2016-01-21T09:26:45Z

It wasn't by thermistor, it was the catridge reset!

I put in a new xyz green abs cartridge that I had and now everything prints fine.

Is there something stored on the cartridge that would affect layer heights?

My hand might be forced into repetier!

Re: Ruined my thermistor??

2016-01-21T08:32:23Z

I was able to cut off the slit Teflon tubing and slide it over the wire. Reassembled to whole head and printed some Keychain samples after manually leveling the bed with the 'paper' method.

The prints are stringy and just crumble

I did reset the cartridge last night. Although the temperatures are the same as what they were before, is there something else in the cartridge EEPROM that could be causing this problem?

Re: Ruined my thermistor??

2016-01-21T05:45:26Z

Ok, I was able to get the thermistor out.

Just an FYI for anyone trying to do this, the setpin that holds it in (which is also the leveling meter for the bed) is protected by the silver plate of the extruder. To get that plate off, first remove the set screw that hold the heating element in, and pull the heating element out. You can then use a screwdriver to torque the brass extruder head away from silver part (held in a clamp).

Checking my thermistor with an Ohm meter, I am getting 85k ohms... i have read most people use 100k ohm for replacements but I have not seen anyone post what the stock resistance is, so I don't know if this is correct or not.

before replacing it, I am going to try putting new teflon tubing to see if that does the trick.

Ruined my thermistor??

2016-01-21T03:35:37Z

The stock software told me to clean my printing head today, I have had the printer for 4 days, pretty much printing 24/7 since I got it.

While cleaning the head, I thought the thermister was a bit of white filament that was stuck to the side of the head, and I tried brushing it off.

When that didn't work, like an idiot I took a razor blade to it! I was successful in removing all of the high temp silicone. When the wires themselves would not cut, I stopped myself. Google taught me what the "thermist0r" is.

The wires running into the head are still in tact, but I cut the sheething over one of them, and bare wire is showing. Also, there is no silicone holding them on.

Since then, when I print something the printer reports correct temperatures as requested in the G-code or as programmed into the cartridge.

However the prints themselves are extremely brittle, and the strings pull off layer by layer.

It is obvious to me that I am not getting the temperatures that I need to properly melt the ABS, despite what the thermister is reporting.

Is there a chance that this thing will still work if I can replace the plastic sheething over the broken wire?