Lenco demonstrator
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#106 Re: Lenco demonstrator
Done (ish)
Iec socket is fitted, just need the top plate earth fitting but ive run out of green wire
Iec socket is fitted, just need the top plate earth fitting but ive run out of green wire
- Paul Barker
- Social Sevices have been notified
- Posts: 8991
- Joined: Mon May 21, 2007 9:42 pm
#107 Re: Lenco demonstrator
Elegant.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#108 Re: Lenco demonstrator
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.......
Took some swearing and headscratching to figure it out.
I might still take a mallet to it yet.......
- Mike H
- Amstrad Tower of Power
- Posts: 20189
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#109 Re: Lenco demonstrator
"Oo ah" noises...
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
#111 Re: Lenco demonstrator
Looking at the Inspire website linked to by Nick, they are selling their tweaked Lenco without arm or cartridge for just under 2K!
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#112 Re: Lenco demonstrator
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.
I don't think it likes me
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.
I don't think it likes me
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#113 Re: Lenco demonstrator
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
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
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#114 Re: Lenco demonstrator
- cressy
- Shed dweller
- Posts: 2906
- Joined: Fri Aug 03, 2007 7:07 pm
- Location: the great white space
- Contact:
#115 Re: Lenco demonstrator
- Dave the bass
- Amstrad Tower of Power
- Posts: 12276
- Joined: Tue May 22, 2007 4:36 pm
- Location: NW Kent, Darn Sarf innit.
#116 Re: Lenco demonstrator
One of them new fangled Shoddy pressure cookers innits!
"The fat bourgeois and his doppelganger"
- Mike H
- Amstrad Tower of Power
- Posts: 20189
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#117 Re: Lenco demonstrator
Yes I'm afraid it does!
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
#119 Re: Lenco demonstrator
Chips and music, what's not to like?
- Paul Barker
- Social Sevices have been notified
- Posts: 8991
- Joined: Mon May 21, 2007 9:42 pm
#120 Re: Lenco demonstrator
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