Choose the geometry you want to use: Baerwald (B), Lofgren (L) or Stevenson (S).
Screw
the gauge tower on the disc and place the Protractor on the platter.
Aim with the pin in the gauge exactly over the pivot point of the
tonearm. Move cartridge in the headshell so that stylus lands on the
crosslines of your chosen geometry (B, L or S) at step 1 (overhang). In
case you cannot reach either point on the Protractor please check your
pivot-spindle distance.
Carefully tighten one screw a little bit
and make sure you can still turn the cartridge in the headshell. Set
antiskating to zero.
Turn
Protractor so that you are over area of step outer Null-point). Set
angular offset (zenith) so that the printed line on the Protractor and
the cantilever of your cartridge fall in line when looking from the
front. In case this is done carefully tighten both screws in an
alternating way and take care the cartridge doesn‘t move anymore in this
process. Caution! Don‘t overdo the tightening of the screws as really
tight is followed by infinitely loose forever …
Double check your
setup either at step 3 (inner Null-point) where the cantilever MUST
fall in line with the printed line or you can alternatively check the
overhang again at step 1. Both approaches are mathematical equivalent;
if two points are correct, the third is correct by default. In case the
cartridge still is off, then start again from the beginning by checking
the overhang first and subsequently all the following steps again.