PSN-L Email List Message

Subject: Lehman set up
From: "Ted Channel" tchannel@............
Date: Fri, 23 Apr 2010 12:08:40 -0600


Hi Folks,   Many of you have more experience in setting up a Lehman.   I =
have a basic question.   Let's assume the frame and the horz arm are =
parallel.   The vertical column has two pivots points, for the arm, top =
and bottom.   The bottom pivot is a roller on roller and is not =
adjustable.   The top pivot is a wire, which carries the weight of the =
arm.   This wire has two adjustments.   One is a slip nut, which allow =
the suspension wire to be shorten or lengthen, and keeps the arm =
parallel to the base.    (The next adjustment on this top pivot wire is =
an adjustment screw which moves this point forward or behind that of the =
bottom pivot)

This tilt off vertical is also controlled using the front adj. leg.

My question is "as a starting point, should the top pivot point be =
perfectly vertical to the bottom pivot point"   Or should it be slightly =
behind or in front of the bottom pivot point?

I have set up several Lehman's, and really not paid much attention to =
this.    I think I have always started with them vertical and used the =
front leg to move the top point behind the bottom pivots.

I do know there's are lots of things to consider in this set up.   but I =
would like your opinion on this point,   I think I understand the =
others.








Hi Folks,   Many of you have = more=20 experience in setting up a Lehman.   I have a basic=20 question.   Let's assume the frame and the horz arm are=20 parallel.   The vertical column has two pivots points, for=20 the arm, top and bottom.   The bottom pivot is a = roller on=20 roller and is not adjustable.   The top pivot is a wire, which = carries=20 the weight of the arm.   This wire has two = adjustments.  =20 One is a slip nut, which allow the suspension wire to be shorten or = lengthen,=20 and keeps the arm parallel to the base.    (The next = adjustment=20 on this top pivot wire is an adjustment screw which moves this point = forward or=20 behind that of the bottom pivot)
 
This tilt off vertical is also = controlled using the=20 front adj. leg.
 
My question is "as a starting point, = should the top=20 pivot point be perfectly vertical to the bottom pivot point"   = Or=20 should it be slightly behind or in front of the bottom pivot = point?
 
I have set up several Lehman's, and = really not paid=20 much attention to this.    I think I have always started = with=20 them vertical and used the front leg to move the top point behind the = bottom=20 pivots.
 
I do know there's are lots of things to = consider in=20 this set up.   but I would like your opinion on this=20 point,   I think I understand the others.
 
Thanks, Ted

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