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Old 10th July 2013, 12:31 AM   #61
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I will build it for sure.
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Old 10th July 2013, 12:35 AM   #62
49 - for the 18th time
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Originally Posted by vynuhl.addict View Post
I'm going to put together a plan and parts list, so that will be coming up. All parts are available between Home Depot, scientific supply store,and most hobby stores that cater to rc car builders.

Colin
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Old 10th July 2013, 12:41 AM   #63
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I was here first, Thomas.
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Old 10th July 2013, 02:05 AM   #64
49 - for the 18th time
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I was here first, Thomas.
Ummmmm - actually I'm fairly sure that Colin wuz here before any of us.... and he's sharing....
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Old 10th July 2013, 03:45 AM   #65
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After looking at this diy arm closer, I discovered the builder reuse the arm base from a VPI JMW 9" pivot arm on a VPI Scout turntable! Clever. I always like projects that don't require reinventing the wheel. Be ecologically correct and recycle! And I would find a way to reuse that Lemo connector so I can swap out arm assemblies on the fly.


This is less inspired by the Cantus than the Souther or even the Ladegaard.
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Old 10th July 2013, 03:53 AM   #66
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Cancelled the second one, mass is getting too high!. I've gone back to building a second copy of the first arm . This will be for a turntable project build!. Thank you for all the interest in this project and I'd urge anyone to give it a go , its worth it and easy to build.


Colin
Colin: way back somewhere in the Opus3 thread one of the members was playing with dual glass tubes in which he ran two horizontally mounted bearings on a simple carriage and then he experimented with a vee grove made up from glass window stock. Half the bearing weight/cost. Just a suggestion. Best regards Moray James.
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Old 10th July 2013, 04:01 AM   #67
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Hi Moray,


That's part of the fun of this , builders are free to experiment with whatever setup they desire, the v groove is another good idea but I've found the 4 bearing works very well without much added cost. Just a different way of getting to point b.


Colin
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Old 10th July 2013, 05:15 AM   #68
bgruhn is offline bgruhn  United States
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Hi Moray,




I've looked into ceramic bearing assembly's, there may be a small gain in this case, but from what I've been told by some local bearing companies any gain may be small for the expense vs steel bearings, but the way I've used the bearings also keeps friction low since they roll free on a brass shim.


Colin


Hi Colin,

I've been following this discussion with great interest. Very good work on your part. I don't fully understand what you have done with the bearings and the brass shim. I can see that a brass sleeve provides a spacer between the back and front bearings of each pair. But do you have a portion of the spacer reduced in diameter so that the inner race of the bearing is free to rotate on the brass in the manner of a sleeve bearing? For this to provide any reduced friction over the already very low friction of the ball bearings would require precision machining and surface finish such that the sleeve bearing would have to be free enough that it would take over from the ball bearing if that bearing had tight spots in its rotation. Sorry, but I just don't get what you are up to here. Please explain?

Another question please. Do you or any other users of linear tracker arms, especially users of real Cantus 3 arms, experience high sensitivity to defects in record surface with clicks and pops? I have some records that have spots where the arm just sits there repeating that groove endlessly. Sometimes it will jump out and continue playing the record. With some of my older disks (favorites) this can be real annoying having to jump up and move the needle to the next groove. The most annoying part of this situation is that the Schroeder clone ignores these defects completely. At worst I hear a soft click as the needle goes through the defect. I would like to hear of any other folks experiencing this and what if anything you have done to eliminate it.

Thanks,

BillG
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Old 10th July 2013, 06:40 AM   #69
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Bill I have both a Cantus arm and a Continuo table. Due to health issues they have been packed away for more than a year now. I did not get enough use on them prior to that to be able to provide you with any useful information expect to say I did not notice the problem that you have. I can say that the arm is sensitive to set up but is stable once adjusted. Sorry that I cannot be of more assistance. Best regards Moray James.
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Old 10th July 2013, 08:15 AM   #70
Marra is offline Marra  United Kingdom
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I look forward to reading that.Some really interesting reading what with this thread and the Opus Cantus one.Making one of these will certainly make a change from amps.
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