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PostPosted: Tue Aug 01, 2017 11:03 pm 
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Hi everyone. New to the form here so hello from me.
I broke my back last year and have had to have a bit of a career path change. (I'm no good for bending and lifting all day anymore) I picked up a old DAWE INSTRUMENTS Ultra Sonic Cleaner #6292A with the intension of cleaning and rebuilding motorcycle and outboard carbs and components. This unit was perfect, came with a good 50L heated tank and a nice stainless bench to sit it on. It seemed a steal for £150.
Story was with it the power cable got crimped somehow and it blew a small 5A glass cylinder type fuse with a copper coil inside (similar to automotive glass fuses but slightly thicker and longer) the bloke said he had looked for a new one but he broke it while removing so didn't know what it looked like.
I brought it home put on a new plug and while doing so spotted 2 spare special Fuses.
Couldn't believe it. All excited now I put the new fuse in. Plug it into a extension lead and flick the switch anddddd. Half a second of power and it blew (didn't trip) the 16A circuit breaker. Both the special Fuse and the plug fuse were fine.
I had nothing else running off the extension lead. The electrics in this farm unit arnt great if I'm honest.
Am I asking too much for the farm yard electrics or could a fault with my Ultra Sonic Cleaner be causing me problems. I didn't have a new breaker to put in.
What can I do to test thing's?
I can't find out much information on this machine so any other information is appreciated.
Thanks for your time in this long winded post.
Sam


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PostPosted: Wed Aug 02, 2017 5:48 am 
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samsomewhere wrote:
Half a second of power and it blew (didn't trip) the 16A circuit breaker. Both the special Fuse and the plug fuse were fine.


If you are saying the 16A MCB "blew" then it seems like your cleaner has a problem, as an MCB will trip quicker than a fuse will.

If everything was ok before you got this machine, to me it implies there is a problem with it and the previous owner could not find the problem and that is why "It seemed a steal for £150."

You know what they say........if it seems to good to be true, it probably is.

As it is a specialist item, it needs to be looked at by a person who knows what they are doing, anything else is just hit and miss. :cb

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PostPosted: Wed Aug 02, 2017 11:03 am 
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Yeah I was guessing that was the case. The heated 50L tank and a load of stainless are good.
I've got a friend who is good with these types of things but I'm not hoping out for much.
Any information or reading about the ultra sonic Cleaner is still welcomed .
Thanks


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PostPosted: Wed Aug 02, 2017 2:07 pm 
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Heated stainless tank, first port of call would be checking that element, would not surprise me if it go damaged and was grounding itself on the tank.


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PostPosted: Wed Aug 02, 2017 3:37 pm 
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The other area is a bit more technical - the ultrasonic transducer is driven by a 'switched mode type' circuit with a switching transistor that often blows. Not difficult to fix if you know the technology but otherwise requiring 'specialist' knowledge.

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PostPosted: Wed Aug 02, 2017 3:42 pm 
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It looks as if it may well be 45 year old kit as well.
http://archive.commercialmotor.com/arti ... ic-cleaner.
Doesn't mean it's not repairable, but it is getting on a bit.


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PostPosted: Thu Aug 03, 2017 10:46 am 
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Thanks for all of your replies. Yes it is an old British unit. Early 80's I think so no doubt something has failed internally. The heated tank as elements work as they should.
I'm going to get my sparkie mate to cast his eyes over it and see if he can help. Admittedly my electronic knowledge isnt as good as I would like but for the last 15years I've been working as fitter / second man (geological drilling rig)
You mentioned switched mode type circuit. I'm guessing this starts off on a small load then steps up to full power? I've got some reading to do I think. Would love to get these going as I really need something I can do to bring in some money's that isn't going to knacker me.
Thanks for your help so far. I'll get some photos today and put them up.
Thanks


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