Uni-Protractor Set tonearm alignment

Dear Thuchan, Jazzgen,
I mounted my 12” JMW memorial on an armpod and set it up on another table on weekend for the Jrs. experiment.

It took all of two minutes – no numbers or calculations - I put the cartridge in the VPI tonearm head - nice and straight the way I wanted it to be held - firmed up the bolts.

Then I rotated the JMW arm hinge and the armpod until it lined up perfectly with the VPI jig.

I have found that JMW arm works best for me with no turn of the wire.

Sorry to digress away from the thread theme.

Cheers Chris

Dear Nandric,

Not so fast. I'll show you examples of tonearms.

Anti-skate from outer grooves toward inner grooves:

Constant : Clearaudio Unify, and simple counterweight
with string

Increases: Clearaudio Satisfy, and those using spring, and
most of magnet design

Decreases : Morsiani.
Here's the link :http://www.morsiani.it/

So, which one is correct or none of the above ?

I'll wait for John. He's a designer,and seems knowledgeable.

Cheers,

Dear Mesael, Morsiani is right.
He is right in that the skating force get's lower/less towards the inner label - i.e. decreases with decreasing groove radius.
As the contact area towards the inner groove wall decreases with decreasing radius, so does the friction - ergo the related skating force.
So Morsiani's concept does address the problem rather smart.
Cheers,
D.

Dear Daniel, why don't you get a cup of hot milk and get a good sleep also?
Ooops! I forget. I promised not to ask anything.

Regards, Mesael: Thanks for the link to "morsiani". The thought of skating forces increasing towards the spindle was not consistent with what little I understand about Newton's concept of centripital force.

Peace,