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Old 01-15-2020, 03:46 PM
Mike Kaplan Mike Kaplan is offline
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Gb5 question

Please donít answer this question with any answer such as : call Digitry. (Mia)

My kiln is suddenly dropping in temp. as if I turned it off. Does this sound like a thermocouple?
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Old 01-15-2020, 04:52 PM
Shawn Everette Shawn Everette is offline
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More info needed. Still power to everything? Mini fuse in GB blown? Relay activating but temp "dropping"? All elements working?
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Old 01-16-2020, 09:58 AM
Mike Kaplan Mike Kaplan is offline
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Everything seems normal except the temp is just dropping.
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Old 01-16-2020, 10:29 AM
Shawn Everette Shawn Everette is offline
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So the kiln temp is actually dropping and the gb registers that? That would indicate a loss of power, either to the relay, from the relay, or an element gone bad.

If it's not registering the drop, then I'd go towards a thermo problem or the gb motherboard has gone bad.
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Old 01-16-2020, 02:28 PM
Henry Halem Henry Halem is offline
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Call Digitry

Call Digitry
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Old 01-16-2020, 03:46 PM
Rick Kellner Rick Kellner is offline
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Call Watlow.
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Old 01-17-2020, 08:10 AM
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Pete VanderLaan Pete VanderLaan is offline
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Call Dr Glass.

If you have a multi meter, check to establish that you have power to the relay overseeing the elements. If there is power there, check the other side of it as to power out to the element. Also check continuity in the relay itself. Then check continuity in the element itself, assuming you only have one. Also check to see if the controller is in fact making a call to activate the relay. That's the two input wires coming from the controller. IF all else fails, Call Eben and he'll tell you how great Digitry is.

I don't think it's the thermocouple or its connections or the readout would be all over the map. Motherboards? that should be born out with the power check I've already mentioned.
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Old 01-17-2020, 10:22 AM
Mike Kaplan Mike Kaplan is offline
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Digitry finally got back to me and said it is likely the relay and if not then the gb5 needs to be sent back. So I will replace the relay and hope it works
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Old 01-17-2020, 10:41 AM
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It's easy to test. Just do what I suggested.
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Old 01-17-2020, 11:36 AM
Mike Kaplan Mike Kaplan is offline
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It is an easy test only when itís not working unfortunately it is very intermittent
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Old 01-17-2020, 11:39 AM
Mike Kaplan Mike Kaplan is offline
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I would like to set up a light that would go on if this Kiln drops below a certain temperature. Does anyone have any suggestions how to set something like that up. I guess it would be like an alarm if temp drops below a set parameter
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Old 01-17-2020, 06:42 PM
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Quote:
Originally Posted by Mike Kaplan View Post
It is an easy test only when itís not working unfortunately it is very intermittent
***
I've gone back and reread this entire thread. At no point did you bother to mention that the shutdown was intermittent making virtually every observation about the problem completely useless. If you can't simply state the circumstances creating the problem, then don't post them at all.

Relays in fact can run and then crap out as they perform their jobs when they heat up. . At one point, Corning sold off vast numbers of MDR's that did exactly that. It's been about twenty years since it occured.
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Old 01-18-2020, 12:25 PM
Eben Horton Eben Horton is online now
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Sticky relay.

If you want to double your fun, wait until is sticks on the closed position with an annealer full of work and creates its own fusing project.
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Old 01-18-2020, 01:28 PM
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Not necessarily stick but it's one of two possibilities. I've also seen the solenoid on even MDR's simply shut off when they have been running for a while. They start cold just fine but have issues as they run. You are right if a mechanical relay fails and sticks but for an MDR to stick open would be pretty remote. I don't know how that would happen unless it suddenly was laying on its side.
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Old 01-20-2020, 08:41 AM
Mike Kaplan Mike Kaplan is offline
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Looking into it further I have found some damage to the relay and I am switching that out
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Old 01-20-2020, 12:45 PM
Shawn Everette Shawn Everette is offline
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That's always fun.
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Old 01-20-2020, 02:46 PM
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Quote:
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That's always fun.
****
I like the use of the negative space.
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Old 01-21-2020, 10:01 AM
Shawn Everette Shawn Everette is offline
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It was about 20 hours or so of enameling. Did still kinda look interesting if I could of saved it.
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