Heat bed fault

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SVG
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Joined: Wed Apr 11, 2018 10:49 am

Heat bed fault

Postby SVG » Fri May 04, 2018 2:20 pm

I finished my RMax v3.2 kit build this week. Was a lot of fun.
After running a few prints I just started receiving a heater (bed) fault. The temp will steadily climb then the reading goes parabolic.
When I look at my thermistor glass bead I think it looks different now, like it has something cloudy inside it, although I’m not sure. I’ll attach a pic for reference.
Can I test it with a multi-meter?


SVG
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Xenocrates
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Joined: Wed Sep 23, 2015 2:55 pm

Re: Heat bed fault

Postby Xenocrates » Fri May 04, 2018 3:24 pm

Yes, you can test a thermistor with a multimeter. There are a few things to check. Make sure it is not shorting to the edges of the hole, that the solder joints are in good shape, and that the thermistor itself reads approximately 100K at room temperature.
Machines:
Rostock Max V2, Duet .8.5, PT100 enabled E3D V6 and volcano, Raymond style enclosure
Automation Technology 60W laser cutter/engraver
1m X-carve router

Sic Transit Gloria Mundi
01-10011-11111100001

SVG
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Posts: 4
Joined: Wed Apr 11, 2018 10:49 am

Re: Heat bed fault

Postby SVG » Fri May 04, 2018 6:46 pm

Xeno, you were spot on. It must have been grounding itself to the bed. Since re-centering the probe all is well.

Thanks for the assist!

SVG

eoppon
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Joined: Thu Jul 12, 2018 11:27 pm

Re: Heat bed fault

Postby eoppon » Sat Jul 14, 2018 4:42 am

Xeno, you were spot on. It must have been grounding itself to the bed. Since re-centering the probe all is well.
Thanks for the assist!
SVG

Thanks SVG. My depression was increasing and luckily I saw your comment and problem are solved. I bought a new multimeter after reading a review from the best multimeter reviews website. It was from fluke brand. I thought this was a multimeter issue and it is not providing the accurate result. After re-centering the probe my problem was solved.
Last edited by eoppon on Thu Aug 02, 2018 3:40 am, edited 2 times in total.
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Xenocrates
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Posts: 1545
Joined: Wed Sep 23, 2015 2:55 pm

Re: Heat bed fault

Postby Xenocrates » Sat Jul 14, 2018 11:43 am

Best of luck with everything eoppon, and welcome to the forums. I'm glad that we got your problem fixed rapidly.
Machines:
Rostock Max V2, Duet .8.5, PT100 enabled E3D V6 and volcano, Raymond style enclosure
Automation Technology 60W laser cutter/engraver
1m X-carve router

Sic Transit Gloria Mundi
01-10011-11111100001


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