I strongly concur with the other comments. That tiny, fragile thermistor cable is completely unprotected and very easy to damage. The set screw is so small it’s pointless trying to remove it without stripping the hex, even when applying heat. It may as well be permanently riveted.
I bought a replacement thermistor for $10, but it was for nothing. Like others, I will have to buy a whole new hot end for $100 including shipping, even though all the other parts of the hot end are still fine (heat sink, heating cartridge, etc).
There is definitely potential for improvement in the design.
I know it’s been a while since you asked the question, but in case someone else finds this post while looking for the answer…
Ditto. Thankfully, it only took hours to fix and not days. I realized there was a problem after I attached the the wire routing when the nozzle was loose and rotating freely. Still, it should be more difficult to snap on the extruder cover if the extruder is not in the right position. It’s never fun disassembling a part immediately after spending an hour assembling it.
While your at it, it wouldn’t hurt to make these parts poka-yoke. They look almost identical, and I’m sure plenty of people have switched right/left during installation. Maybe make the hole pattern slightly asymmetrical.
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