SoliForum - 3D Printing Community — Thermister variability in E3D-V6 hot end

Re: Thermister variability in E3D-V6 hot end

null@example.com (cliquot22) — Wed, 18 Nov 2015 18:35:20 +0000

The screw holding the thermister in place seemed to be too tight and was causing a short circuit. After replacing the insulation and adding thermal conductive compound, it all works much better.

Re: Thermister variability in E3D-V6 hot end

null@example.com (AMWEI Thermistor) — Wed, 18 Nov 2015 09:05:19 +0000

For Thermistors for temperature sensing, there are tolerance range, such as NTC thermistor R25 tolerance +-1%, +-2%, +-3%, or +-5%, etc. Wider R25 tolerance may lead to higher temperature error. And also temperature error may increases with temperature raises.
Temperature measurement accuracy request in your application range needs to be stipulated to the manufacturer for selecting part.

Re: Thermister variability in E3D-V6 hot end

null@example.com (cliquot22) — Sat, 10 Oct 2015 16:06:09 +0000

I ran the autotune and it seemed to work. If it develops a problem in the future, I may look at the connector again.

Re: Thermister variability in E3D-V6 hot end

null@example.com (elmoret) — Fri, 09 Oct 2015 17:30:43 +0000

Looks like a poor connection to me.

Re: Thermister variability in E3D-V6 hot end

null@example.com (heartless) — Fri, 09 Oct 2015 11:56:59 +0000

you need to do a PID tune to get it stabilized.

do a search for it, there is plenty of discussion about it.

Thermister variability in E3D-V6 hot end

null@example.com (cliquot22) — Fri, 09 Oct 2015 05:50:45 +0000

My temperature as reported by the thermister in my e3d hot end varies significantly. It goes +/-3deg in just a few seconds. I don't think it should be doing this. Does this mean my thermister is bad or something else?

I added a picture of the temperature profile.

I'm using a printrbot simple metal with Repetier software.