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Finally, an affordable CD Transport: the Shigaclone story
Finally, an affordable CD Transport: the Shigaclone story
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Old 9th May 2008, 06:14 PM   #881
luvdunhill is offline luvdunhill  United States
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Peter: I like the ML31.5 approach the best. A few questions:

1.) how tall are the springs with no load
2.) what is the outside diameter of the spring
3.) how tall are the springs with the load
4.) how much does the load weight?
5.) what is the shape of the wire: square, oval, round?

I think we can find these easily. Also, the socket caps should be easy to find as well.

I will calculate the resonant frequency of the above and then scale it to how much my metal frame will weigh and choose the spring based on this.
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Old 9th May 2008, 07:46 PM   #882
kevinkr is offline kevinkr  United States
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Finally, an affordable CD Transport: the Shigaclone story
Quote:
Originally posted by luvdunhill
Peter: I like the ML31.5 approach the best. A few questions:

1.) how tall are the springs with no load
2.) what is the outside diameter of the spring
3.) how tall are the springs with the load
4.) how much does the load weight?
5.) what is the shape of the wire: square, oval, round?

I think we can find these easily. Also, the socket caps should be easy to find as well.

I will calculate the resonant frequency of the above and then scale it to how much my metal frame will weigh and choose the spring based on this.
Good approach, but don't assume that this will get you all the way, I would recommend getting springs having characteristics that bracket the calculated value by a wide margin. What ends up working best may not be what you initially calculated. (For example how do you choose the optimum resonant frequency for the mechanism mass given other variables like what you have it placed on? And its resonances..)
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Old 9th May 2008, 08:00 PM   #883
MrMajestic is offline MrMajestic  Sweden
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Quote:
Originally posted by MrMajestic
I have one spare EZ31 that I could part with if someone is interested. Realized I went a bit shop-happy when I found out they were in stock here
The player is no longer available. Its on its way to Norway for maming and mutilation
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Old 9th May 2008, 09:28 PM   #884
superhkm is offline superhkm  Norway
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Parts ordered. Mutilation to come.
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Old 9th May 2008, 09:45 PM   #885
Peter Daniel is offline Peter Daniel  Canada
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Quote:
Originally posted by luvdunhill
Peter: I like the ML31.5 approach the best. A few questions:

1.) how tall are the springs with no load
2.) what is the outside diameter of the spring
3.) how tall are the springs with the load
4.) how much does the load weight?
5.) what is the shape of the wire: square, oval, round?

I think we can find these easily. Also, the socket caps should be easy to find as well.

I will calculate the resonant frequency of the above and then scale it to how much my metal frame will weigh and choose the spring based on this.
IIRC, the load (lead frame) is 5kg, the spring dia is 1". They are approx. 2" tall , the wire is round and they don't compress more than 0.1" under the load.
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Old 9th May 2008, 09:46 PM   #886
kevinkr is offline kevinkr  United States
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Quote:
Originally posted by superhkm
Parts ordered. Mutilation to come.
My wife was pretty horrified by the whole mutilation part of it. (Oh, the horror of it.. ) Might best keep loved ones away from the scene of the surgery..
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Old 9th May 2008, 10:52 PM   #887
Zigis is offline Zigis  Latvia
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Thank you Franz for your kind offer, it is really hard to find DIP package today. I can't send you mail from here, can you mail me to zigisg/at/inbox.lv

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Finally? Nothing is finally, in my audio setup

Yes, I now this feeling

Peter Daniel, where can I see your DACs ?

Zigis.
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Old 9th May 2008, 11:07 PM   #888
JC Fardo is offline JC Fardo  Brazil
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Quote:
Originally posted by Peter Daniel


IIRC, the load (lead frame) is 5kg, the spring dia is 1". They are approx. 2" tall , the wire is round and they don't compress more than 0.1" under the load.

Could you please tell us what is the wire diameter. Itīs also a helpful detail, if you donīt mind.

Assuming springs are made of "music" or harmonic wire, we are near to target.

Thanks a lot
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Old 9th May 2008, 11:21 PM   #889
Ed LaFontaine is offline Ed LaFontaine  United States
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Quote:
Could you please tell us what is the wire diameter?
Scaling from the photo Peter provided, I'll go out on a limb and guesstimate 0.079", +/- 0.005"
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Old 9th May 2008, 11:36 PM   #890
JC Fardo is offline JC Fardo  Brazil
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Quote:
Originally posted by Ed LaFontaine


Scaling from the photo Peter provided, I'll go out on a limb and guesstimate 0.079", +/- 0.005"

Exactly 2,0mm +/- guestimate margin. Not bad, Ed. Thanks
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