ANGLING FOR 90° - tangential pivot tonearms - Page 43

Straight Tracker · 25th October 2012, 07:14 AM

The bearings for motion in the vertical plane that I used in my 1980s Tangential Arm and later in my 2010 Tangential Arm are of the zero friction/ zero stiction type. I don't know that Frank is using those bearings, but the description fits.
I am also using them in my 2012 Tangential Arm. This is a servo arm with absolutely no tracking error.
I'll describe it soon in its own thread.

Sincerely,

Ralf

directdriver · 25th November 2012, 05:24 PM

Here's an interesting arm that uses a straight headshell with no offset angle. The idea is to lessen side force so, alas, it has nothing to do with tangency. The bearing design is interesting with floating liquid. Check out the website.

ViV Lab Rigid Float Tonearm

-----------------------------------------------------------

Esperado · 06:01 PM

Quote:

Originally Posted by Straight Tracker

This is a servo arm

Definitely the best solution cause it solves near all issues at once. No distortion due to angle error, no distortion due to angle errors of the cantilever and non symmetrical forces on it, no added frictional or inertial forces.
Remain only one: Torsion constraints on the signal wires. Can be solved with 4 neddles immersed in 4 buckets filled with liquid metal. That i did in 1967 with mercury (allowed at this time).
Strait arm on a ramp addresses a great part of this problem as the arm don't change his angle if the record is flat and well centered. So the wires can be in neutral position.

directdriver · 26th November 2012, 04:11 AM

A Van Eps tonearm was sold for over $2500 last year on eBay. Check out the pictures.

Highly Desirable 1960's Van Eps 2A Dual Compensating Playback Tonearm, Complete!

RCruz · 26th November 2012, 07:41 AM

Love that B&O SP12 cart

Esperado · 26th November 2012, 01:24 PM

Quote:

Originally Posted by directdriver

A Van Eps tonearm was sold for over $2500 last year on eBay.

Beautiful piece of art.
I can't figure out where is the vertical pivot.

directdriver · 26th November 2012, 05:55 PM

Quote:

Originally Posted by Esperado

I can't figure out where is the vertical pivot.

I believe it is parts #36 and #37

directdriver · 10th December 2012, 06:57 AM

More revealing pictures of the LT arm. Notice the guiding mechanism below the pivoting plate in line with the armwand.... and of course the straight headshell with no offset angle.

RCruz · 10th December 2012, 08:33 AM

Wonderfull

What I would like to see is a movie capturing arm motion from top

tnargs · 10th December 2012, 10:16 AM

Quote:

Originally Posted by RCruz

Wonderfull

What I would like to see is a movie capturing arm motion from top

Me Too!

25th October 2012, 07:14 AM	#421
Straight Tracker diyAudio Member Join Date: Nov 2010 Location: Prescott, Arizona	All The bearings for motion in the vertical plane that I used in my 1980s Tangential Arm and later in my 2010 Tangential Arm are of the zero friction/ zero stiction type. I don't know that Frank is using those bearings, but the description fits. I am also using them in my 2012 Tangential Arm. This is a servo arm with absolutely no tracking error. I'll describe it soon in its own thread. Sincerely, Ralf

26th November 2012, 07:41 AM	#425
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	Love that B&O SP12 cart __________________ RC

10th December 2012, 06:57 AM	#428
directdriver diyAudio Member Join Date: Nov 2005	Schröder LT tonearm More revealing pictures of the LT arm. Notice the guiding mechanism below the pivoting plate in line with the armwand.... and of course the straight headshell with no offset angle.

10th December 2012, 08:33 AM	#429
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	Wonderfull What I would like to see is a movie capturing arm motion from top __________________ RC

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

25th November 2012, 05:24 PM	#422
directdriver diyAudio Member Join Date: Nov 2005	Here's an interesting arm that uses a straight headshell with no offset angle. The idea is to lessen side force so, alas, it has nothing to do with tangency. The bearing design is interesting with floating liquid. Check out the website. ViV Lab Rigid Float Tonearm -----------------------------------------------------------

26th November 2012, 04:11 AM	#424
directdriver diyAudio Member Join Date: Nov 2005	A Van Eps tonearm was sold for over $2500 last year on eBay. Check out the pictures. Highly Desirable 1960's Van Eps 2A Dual Compensating Playback Tonearm, Complete!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
String suspension vs. uni pivot or gimball tonearms	nghiep	Analogue Source	26	13th August 2011 04:27 AM
90+90 volt rails	sakis	Solid State	42	5th April 2011 01:38 PM
Angling drivers left and right in a vertical line-array????	ozziozzi	Multi-Way	12	16th January 2009 04:23 AM
Tangential Arm Floating Magnets	ebijma	Analogue Source	8	6th December 2004 06:37 PM
Need Amp For 90-0-90 V DC	Drafance007	Solid State	15	12th October 2003 08:03 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read