Strange extruder temp deviations

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frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Strange extruder temp deviations

Post by frankjoke »

I realize since a while that I get not a nice +-2° extruder temperature reading anymore but extruder temp is always off, too high and peaks down to too low.

Please see below:
Extruder Temp over an ABS print...
Extruder Temp over an ABS print...
What is the root cause here? The thermristor, the cable, the electronic, the ... ?

Mike
Posts: 4
Joined: Sat May 17, 2014 11:06 pm

Post by Mike »

I had a similar problem with my Felix 3.0 dual extruder. It went away when I re-routed the thermistor cables to go farther away from the high-current heater cables (for the bed and the hot-end barrels), and in addition to that, also twisted them, so to reduce interference. I should say that I also replaced the thermistors themselves in this operation, but I think the re-routing is what made the difference.

frankjoke
Posts: 150
Joined: Sat Dec 28, 2013 6:07 pm

Post by frankjoke »

I should have known that when exchanging extruder motor and it's cable!
But I have to exchange right extruder motor soon (just need to wait for replacement) and then I will do re-cabeling.

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