Inconsistent Layering

[grimmindustries]

I have been printing parts for a project and I just recently had to change my Extruders' Thermistor. Now I can't get a part to print with consistent layers. I get drooping along the edges and in the interior support.

Has anyone else seen this and know how to fix it?

Thanks,
Ron

[Nylocke]

What thermistor did you have, and which do you have now? Generally the 3 mainly used ones are the EPCOS, the 104GT-2, and the Honeywell axial. EPCOS is slightly larger than the GT-2 and has thicker copper leads coming off of it. The GT-2 is quite small with very thin leads that are more of a gray color. the Honeywell is an axial one, so its more like a standard resistor.

Each has a different beta value, and if you mix the GT-2 and the EPCOS around you can be around 20-30 degrees off. Sounds like you may have had the EPCOS and switched it for a GT-2, I did the opposite and I had to bump things up 20 or more degrees at times.

[grimmindustries]

Hi Nylocke,
The original thermistor was the model that comes with the latest E3D. I replaced it with a model that has a larger glass bead but same thin contacts the brand is Riorand. It flows perfectly fine, do you think I'm running too hot?

[Nylocke]

Possibly, though Ive never seen it flow like that. Try verifying your temps with a thermocouple. Also your thermistor setup is most likely wrong in the firmware. I don't know if there is an existing table for that thermistor (though you can check in the config file). You may have to make your own thermistor table.