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Help! Thermistor keeps failing.

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Posted · Help! Thermistor keeps failing.



I've been printing with my Anycubic Mega X printer for a while now, but I keep having this reacquiring issue. The hotend thermistor keeps failing.


I've contacted the company on several occasions and they sent me replacement hotends, which I replaced, and they worked fine for about a month or so before that thermistor began to fail.


I've been through a lot of hotends and individual (100k) thermistors, and they only seem to last for about a month or so.  This time, I purchased a brand new hotend and installed it on the printer and I only managed to print 1 full part before the thermistor blew.  I had previously ordered some thermistors, but they still haven't shipped in yet (So I'm waiting for those, in hopes that they will work).


My question is, why do my hotend thermistors keep blowing/failing? Can anyone help me solve this issue?


Thanks in advance.   

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    Posted · Help! Thermistor keeps failing.

    Two things with thermistors

    1. Use ridiculiously low torqe when locking them with the grub screw.

    2. Secure the wires like in this picture. They break in no time at all if they can swing.



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    Posted · Help! Thermistor keeps failing.



    The grub screw isn't too tight and the wires are already taped like the above image.

    Yet, I am still having issues.

    Are there any other possible causes that may cause the hotend thermistor to blow/fail?



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