Discuss The Viv Lab Rigid Arm

@rauliruegas 

As any can see it needed only most inner/outer groove radius and nothing else.

This will give you the theoretical placement of the null points.  Nobody is debating this.  Again the topic at hand is actually placing those null points on a record surface and being able to trace through to them with a cartridge.  

More specifically the only comment by me on this topic was simply to state that in order to get existence of two null points, both overhang and offset are required.  In order to calculate those a third variable must be called out (EL, O or P2S).  Using only part of a complete set of formulae "to prove one is right" is of no use in this case.     This has truly become a classic example of what @clearthink outlined above and apologies to all for engaging in this fray of the thread.

dave

Raul, I think you are talking about making a calculation and Dave is talking about geometry.  The point is that in order for any pivoted tonearm to produce two null points on the playing surface of an LP, there MUST be overhang AND the headshell MUST be offset at an angle to the arm wand. You need both conditions.  Simple and true.

My stupidity goes realy away.

R.

It's great to see you doing your homework before making a decision. That's always a smart move! I can totally understand why you're struggling to wrap your head around this new arm concept. It can be tough to visualize how something will work until you see it in action. From what I've heard, though, this arm is the real deal. It seems to be performing as advertised, with zero overhang and no offset.