DIY Schroeder Tonearm???

[velvetsunrise]

Hi, May i sugest you do a google for D bit, fairly easy to make and great for drilling deep holes, but very slow.

Cheers

[EC8010]

Originally Posted by westend

Yesterday, I bought a lathe.

You cannot stop there. Spill the beans. Perhaps on a new thread.

[westend]

Originally Posted by velvetsunrise

Hi, May i sugest you do a google for D bit, fairly easy to make and great for drilling deep holes, but very slow.

Cheers

Thanks, nomenclature is half the battle with building things. A D bit is exactly what I was looking for.

Originally Posted by EC8010

You cannot stop there. Spill the beans. Perhaps on a new thread.

The lathe I have is a basic, entry-level woodworking lathe. It is certainly nothing special and I am almost embarrassed to show a picture of it. I will post some pics of my efforts with the tonearm build (and the lathe) as I get further along. I am attempting to do three audio projects and a home remodeling project, concurrently. In the works and started are a plinth build for a Rek-O-Kut Rondine Deluxe, the Shroeder tonearm, cabinets for Altec drivers, and a bit of trim for the house.
If tools are exciting to you (and what red-blooded man can deny that), I'll post some pics up, including the mortising machine that I am going to pick up this weekend.

[Jeffrey Davison]

Curious... can you provide a source / link for the D bit?
I come up with nothing.

Thanks!

JD

Originally Posted by westend

Thanks, nomenclature is half the battle with building things. A D bit is exactly what I was looking for.


The lathe I have is a basic, entry-level woodworking lathe. It is certainly nothing special and I am almost embarrassed to show a picture of it. I will post some pics of my efforts with the tonearm build (and the lathe) as I get further along. I am attempting to do three audio projects and a home remodeling project, concurrently. In the works and started are a plinth build for a Rek-O-Kut Rondine Deluxe, the Shroeder tonearm, cabinets for Altec drivers, and a bit of trim for the house.
If tools are exciting to you (and what red-blooded man can deny that), I'll post some pics up, including the mortising machine that I am going to pick up this weekend.

[westend]

This is a brief article on making a D bit: how to build a D bit

This is one of the few suppliers of D style bits that I could find:Drill Masters Eldorado Tool - Tool manufacturer for gundrilling applications, drills, drilling, liquid cooled drills, metal types, plastics, composite materials

[velvetsunrise]

More here.

http://www.bagpipeworld.co.uk/MakingBagpipes/Drill.htm

TOOL MAKING

[binspaul]

Hi,

Finally, received the tonearm main metal parts today. I am going for the assembly. (Still few of the things are pending - The tonearm base, tonearm lift and tonearm head shell. Will be getting them by the weekend).

Best regards,
Bins.

[binspaul]

Hi JD,

1. For the tonearm wire braiding, how many twists per inch is required ?
2. What is the pole piece material you have opted for - aluminium/soft iron/something else ?

Best regards,
Bins.

Originally Posted by Jeffrey Davison

What a bloody tedious, stressfull task this was....but well worth the effort.
You have to have a very deliberate, and at the same time very light and with a gentle touch to quad braid 33 ga. wire without crimping it and a strong mental absolute focus not to lose the order of the braiding sequence and not to braid them too tight or too loose. Then fishing the bundle through a .1" hole and a right angle bend after the 10" of armtube. When you do this you must have the patience of ten saints. Wire is VanDenHul MCS150 silver....good stuff to work with considering....
No wonder specialist get the big bucks for this job!

Jeff

[Renron]

I've been reading through the various threads on this wonderful application of a tonearm.
I'd like to say a GIANT "Thank You" to Frank for sharing his hard work, time and $$$ he's invested.
Thank you to all the DIYer's who have posted their efforts and helped out in the discussions to aid us less adept builders.

OK, now that that's out of the way; Has anyone tried using a "Sphere" rather than a disc (shaped or not) for the lower magnet? I was thinking of a 3/8" sphere inserted from the bottom of a 11/32 hole. ie;

I have a N48 1/2 x 1/4 for the arm / wand magnet and was considering using the sphere for the lower. Planning stages only at this point.
Any comments?
Thanks,
Ron

[velvetsunrise]

Hi.
My first thought is why bother. when the arm is parallel to the record, flat, cylindrical magnets are also parallel, giving maximum attraction.

Ok some records are not perfectly flat so there will be some verticle movment of the arm, but in my experience, not enough to justify the much reduced magnetic pull and damping a lower spherical magnet would introduce.

Cheers.