Lenco demonstrator

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cressy
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#106 Re: Lenco demonstrator

Post by cressy »

Done (ish)
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Iec socket is fitted, just need the top plate earth fitting but ive run out of green wire
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Paul Barker
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#107 Re: Lenco demonstrator

Post by Paul Barker »

Elegant.
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cressy
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#108 Re: Lenco demonstrator

Post by cressy »

It's still fighting me, the idler refused to engage when it was put back together. Turns out the spring that engages it was bent where it clips over the post meaning it was very slightly longer so the tension was wrong.

Took some swearing and headscratching to figure it out.
I might still take a mallet to it yet.......
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Mike H
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#109 Re: Lenco demonstrator

Post by Mike H »

:D


"Oo ah" noises...



:D
 
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#110 Re: Lenco demonstrator

Post by jack »

Verrrrrry, very, sweet... :)
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Greg
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#111 Re: Lenco demonstrator

Post by Greg »

Looking at the Inspire website linked to by Nick, they are selling their tweaked Lenco without arm or cartridge for just under 2K! :shock: :shock: :wink: :D
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cressy
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#112 Re: Lenco demonstrator

Post by cressy »

It wouldn't start again this morning, so back to the headscratching. And swearing.
I finally figured out why. Looking at it through the air hole in the underside under the motor, the motor was spinning and the idler engaging it and spinning perfectly well. So not a motor issue.
Watching it with the platter off the idler engaged the motor and the arm holding it rose to be horizontal, square to the top plate as it should do. So not an idler issue. Put the platter on and nothing.
Unscrewing the iec socket and pulling the motor wiring through made it engage. So moving the motor slightly backwards made it work.
When it was lashed up the wiring was hanging out the back with some weight on it so that's why it was ok and was masking the issue.

Redressing the motor wiring failed.

So with the motor hanging freely with no tension on it, the idler was climbing the motor shaft but not hitting the platter, so the gap was too big.

It was the new pom thrust pad that was causing the problem. The new one is just over 1mm, about 1.2 mm thick while the original is 0.3mm thick. So the platter was sitting about 1.0mm higher than standard.
The new idler seems to be fractionally smaller than the original so as a consequence of both changes the gap between motor and platter was too big by a Mil.

Just enough to stop it engaging.
So ive shimmed the bearing assembly with a set of 1mm washers to bring the platter back down to the standard height and it now working properly.

The clue was the speed adjuster that wouldn't adjust until into a position that would give about 40 rpm where the motor spindle is wider, and moving the linkage down towards the 16 rpm end where it's thinnest made the idler disengage.

It threw me one last curveball, something that would never have been an issue at all if the bearing had been ok in the first place and I had not had to get a new part that was non original
Well, at least I know now.
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cressy
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#113 Re: Lenco demonstrator

Post by cressy »

It seems to be behaving itsself now,
If anyone is in the area and would like a listen let me know, any feedback is welcome even of you think it sounds like shite :D
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cressy
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#114 Re: Lenco demonstrator

Post by cressy »

Turned another record weight to match it, and made sure it clears the arm when in the runout groove this time

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cressy
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#115 Re: Lenco demonstrator

Post by cressy »

And with a coat of wax it's done. Finished. Finally
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The missus' friend said with the record weight on it looked like a pan lid.........

Dunno what to make of that :shock:
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Dave the bass
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#116 Re: Lenco demonstrator

Post by Dave the bass »

One of them new fangled Shoddy pressure cookers innits! :)
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Mike H
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#117 Re: Lenco demonstrator

Post by Mike H »

Yes I'm afraid it does! :D
 
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cressy
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#118 Re: Lenco demonstrator

Post by cressy »

Bugger :shock: :D
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Ali Tait
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#119 Re: Lenco demonstrator

Post by Ali Tait »

Chips and music, what's not to like? :D
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Paul Barker
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#120 Re: Lenco demonstrator

Post by Paul Barker »

What about making a wooden version of this Anth? https://www.google.co.uk/search?q=recor ... hKsoQzM%3A
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
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