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diy air bearing tonearm build
diy air bearing tonearm build
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Old 30th August 2017, 06:58 AM   #11
lexx21 is offline lexx21  United States
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Join Date: Mar 2011
Location: North Carolina
I will try to draw it up and post it. Fair warning though....I have no cad skills...lol
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Old 31st August 2017, 02:12 PM   #12
super10018 is offline super10018  United States
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Isn’t it easy to use 1” square tube as air supply channel and 1 1/4” triangle as carriage?
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Old 31st August 2017, 04:18 PM   #13
carolus is offline carolus  Belgium
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1" air supply versus/& 1 1/4" carriage ..... don't match in the 90
Karel
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Old 31st August 2017, 06:22 PM   #14
super10018 is offline super10018  United States
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I see. So you cut all three triangles from one long piece of triangle
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Old 31st August 2017, 06:46 PM   #15
carolus is offline carolus  Belgium
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Yes, (it's tricky), the best (& normal) way is to cut out a Alu-L-profile the air supply arm adjacent with "is" carriage.
I did so (after bad experiences ), very KIS.
Karel
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Old 1st September 2017, 09:29 PM   #16
lexx21 is offline lexx21  United States
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And you need to lap the slide with the piece with the holes. A 25 micron grit shoild work fine.
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Old 1st September 2017, 10:07 PM   #17
carolus is offline carolus  Belgium
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Yes, after that (1 step):
2 step: do the same with "white tooth pasta" (only the white color)
3 step: clean the two pieces (air supply arm & carriage)
4 step: anodization all Alu components.
5 step: assembling the arm & carriage ...

etc.

Karel
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Old 2nd September 2017, 12:44 AM   #18
lexx21 is offline lexx21  United States
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Join Date: Mar 2011
Location: North Carolina
I would use the grit that is used to polish telescope mirrors. 25 micron grit mixed with oil would work well.

There are also sellers on ebay who sell various grit size polishing paste.

Im not sure that I would anodize the angles though. You would be adding a coating to the interface of the two pieces of metal.

Oh, drill first before lapping. Drilling will deform the metal slightly and the lapping will solve that.
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Old 13th September 2017, 04:11 PM   #19
carolus is offline carolus  Belgium
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Quote:
Originally Posted by Ben Culley View Post
....I am in the early throes of building an air bearing tonearm similar to the terminator design. ......
.... any progress ...... ?
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Old 13th September 2017, 11:13 PM   #20
Ben Culley is offline Ben Culley  Australia
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Yes thanks Carlos. Happy with my first attempt. I am working on an adjustable bracket for the up and down movement. I've also made the turntable bearing. Cheers
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