My version of an Ultrasonic Record Cleaner - Page 22 - diyAudio
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Old 6th December 2012, 02:34 PM   #211
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Default Thoughts on the "shaft"

I decided to use wood since it was quickly available from Home Depot.

I have found that the diameter of the shaft is not critical.

What matters in my setup is that the cork spacers remain tight on the shaft. The cork spacers contact with the LP is what turns the LP. Maybe if the turning was at a faster rate this would not work so well but at the speed we are using it is more than sufficient.

My comment made to make the project less daunting for those reading our exploits.

bbftx your refinements are truly refined! I am sticking with my rudimentary approach since it works just fine but is not visually impressive. And most of all I am lazy so when something works ...

Waiting for a few parts to get the pump working and then ...
(My Home Depot has a very poor selection of hose barbs)
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Old 6th December 2012, 04:42 PM   #212
LFM is offline LFM  Canada
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Default USC

Here is my effort. I made the spindle from 5/16 rod and a brass bushing to take the weight off the motor. It was a mistake to place the bushing in the center of the box cover and I had to grind the inside of the box so the motor sat free of any interference. I attached the motor to the box with some clear silicone and it allows enough movement so the motor shaft isn't carrying any weight. I'm using foam from a kneeling pad for the garden to separate and drive the LP's. The innermost one is glued to a round box cover which is fixed to the shaft with a shaft coupler and adhesive. Another box cover and coupler sandwich the albums and foam and provide the drive. I made the foam pucks with a homemade hole saw built from plywood a bolt and a tin can.
I have a Nitty Gritty cleaner and this is much much better. The lead in and lead out grooves are nearly silent and I'm hearing a whole new level of detail that I have never heard before. This is definitely money well spent. I did try rotating the albums manually before I got the motor. It works much better with the motor. Mine is 1 revolution every 5 minutes. I clean for 15 minutes.
I am covering the solution with cellophane between uses and have been using this same solution for 2 weeks. The cellophane floats on top mostly. There has been a barely perceptible level drop. I think that many of us will only clean the albums that they will listen to that day. It would be costly and a real pain to make up new solution every day. I don't think this will be necessary. I'm just going to keep using the solution until I see signs of contamination and then change it thus avoiding the cost of the pump and filters.
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Old 6th December 2012, 07:30 PM   #213
bbftx is offline bbftx  United States
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Default BellDream URC

Quote:
Originally Posted by CT0wens View Post
I ran into this video on YouTube of a Japanese DIY project that incorporates brushes at/below the waterline.
Hi CT0wens,
That's not a DIY machine. It's made and sold by a company called BellDream in Japan. Runs about $1650 I think.

The noise is awful, which can be a sign of cheaper ultrasonic transducers operating at a lower frequency. That, or a lot of stuff is vibrating too!

I think the use of the thin rods sticking into the slots in the plastic knobs to power rotation is clever; very much like a splined coupling.

But it looks like it would take forever to load the machine. Setting up just a single record looks like it involves a lot of parts on the spindle. Speed of rotation looks to be too rapid in my opinion. And the brushes --- no thanks....

I think we can all do better, for fewer yen!

Cheers,
B B
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Old 6th December 2012, 07:40 PM   #214
bbftx is offline bbftx  United States
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Default Spindle

Quote:
Originally Posted by LFM View Post
I made the spindle from 5/16 rod and a brass bushing to take the weight off the motor.
Hi LFM,
Neat, simple setup. Is that a flanged bushing that you used, with the flange up against the inside of the motor housing cover?

Also, did you turn down the diameter on the non-motor end of the 5/16" rod you started with so that the LP holes will fit over it?
Best regards,
B B
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Old 6th December 2012, 09:14 PM   #215
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Default The crux: simplicity is the key (thanks, bbftx)

Sometimes it takes courage to do as little as possible when "more is better" is the operative phrase for much of audio hobbydom.

Not only am I appreciative of bbftx putting together this easy to duplicate scheme for record cleaning, it might be his greatest gift is his telling us that too much IS too much.

Why are brushes considered sacrosanct when it comes to cleaning records? Just because they USED to be all we had does not mean they have some kind of inherent goodness to them. They are an old tool that has been superseded. They are NOT needed.

If they were needed why am I hearing so much new information on records previously cleaned with brushes? This new tool is superior and we should be content to let it do its job as it was intended to do it.

I am still dithering over whether or not to touch the record AT ALL after cleaning. I think I am hearing better sound by letting them drip/air dry. When three are on a spindle they stand straight up with no support and no side forces. Doesn't take that long.

It makes sense that not touching them at all with anything is best - no microfiber cloths - no diapers - no velour pads on vacuum machines - nothing.

Just as with an SET amplifier - simplicity is the key.
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Old 6th December 2012, 10:23 PM   #216
LFM is offline LFM  Canada
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Default ultrasonic cleaner

Yes I did turn down the 5/16 rod to the proper diameter. I have a Taig modellers lathe which works great. The motor end was drilled for the motor shaft and drilled for a small set screw to lock it in place. The bushing is brass and was drilled to the next smallest size drill bit I had as compared to the rod. I then turned and filed the rod until I had the fit I liked. The box cover was drilled to have a very tight interference fit with the brass bushing. I used my vice and some wood scraps to press the bushing into the hole. I forgot to mention that I turned a small shoulder on the bushing so things would be tight and square. The bushing does not bottom on the motor housing but its close. I wanted a little freedom for the motor to move on its silicone mounting pad and to let the bushing carry all the weight.
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Old 7th December 2012, 08:17 PM   #217
KBK is offline KBK  Canada
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Quote:
Originally Posted by bbftx View Post
David,
I think as long as you leave about 1 inch between records, you can get good results cleaning multiple records at a time.

Would this not depend upon the orientation of the transducer, within the fluid bath?

the next trick would be to seal the unit, with records in it... and bring it up to about 2-3 bar. heh heh heh.....
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Old 7th December 2012, 10:14 PM   #218
bbftx is offline bbftx  United States
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Default Loading and Spacing

Hi KBK,
Turns out spacing and loading depend more on the capacity limitations of the machine to clean a given amount of surface area. This is covered in a later posting in this thread than the one you quoted. Here's a direct link to Post #44 that explains:
Loading and Spacing

The units we're talking about generally have three 50 watt transducers along the bottom of the tank. Single transducer units would not work well, particularly with the multiple records.

Cheers,
B B
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Old 9th December 2012, 05:50 PM   #219
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Default 12 VDC filter system

I've had my filtration system running for about 10 days now with very good results. It's basically BB's design except for 2 changes: I'm using a 12 VDC pump for compatibility with the power to my rotisserie, and I added a valve downstream of the filter housing to control the flow rate (red handle in the attached photo).

I run with the valve wide open when not actively cleaning to maximize the filtration rate (keeping in mind that with a recirculating design, we only approach filtration of every suspended particle asymptotically). During active cleaning, I use the valve to limit the return flow velocity, to mitigate possible reduction in the ultrasonic cleaning efficiency. My pump is somewhat oversized, and it generates enough flow through the filter to visibly interfere with the standing wave pattern in the tank. The valve might not be necessary or useful for pumps with lower flow rates.

I'm using an Attwood Potable Water Pump, available from Amazon for $29.85. It's ready to go out of the box, with two 3/8" barbs installed. So, set up only involved mounting on a wooden block with 2 screws, attaching two hoses to the cleaner and filter, and wiring the power. It's a little noisier than I'd hoped --- but no louder than the noise from the ultrasound machine, so not a big deal.

By the way, running the filtration system provides excellent mixing. The temperature field goes from highly stratified to essentially uniform in about 15 seconds. So, managing my heating problems is automatic now.
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Old 9th December 2012, 05:58 PM   #220
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Default LFM's diy hole saw

Hi LFM, it's nice to see another hole-saw solution for the spacers. I particularly like your homemade saw. Otherwise, if you don't already own one, the cost of a new saw of the appropriate size and possibly a mandril can make this an expensive solution.
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