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Cartridge downforce adjustment
The counterweight (4) supplied is suitable for cartridges weighing between 5 - 9g (counterweight no. 83).
Adjust the downforce prior to setting the anti-skating force.
Place counterweight (4) halfway along the counterweight support rod at rear of arm, being sure to have the
securing screw uppermost.
With the power off, and the platter static, place the stylus pressure gauge onto the platter. To set the
recommended 18mN downforce (1mN = 0,1g / 0,1 Pond), place the tip of the stylus exactly in-between the
two points marked 15mN and 20mN.
If the stylus gauge becomes level, then the correct pressure has been achieved. However if the there is
insufficient or excessive pressure the gauge will either not move or tilt down.
To adjust the amount of pressure, carefully move the counterweight (4) along the support rod, until the stylus
pressure is sufficient to raise the pressure gauge to the level position. Moving the counterweight (4) away
from the cartridge will reduce pressure and towards will increase pressure.
Finally secure the counterweight (4) using hexagonal key provided.
Please note: It is advised to remove stylus tip from gauge whilst making adjustments to avoid damage
to stylus.
Adjusting the vertical tracking angle (vta)
** Put a record on the platter. When the needle is lowered into the record groove and the tonearm is not resting
on the lift arm, the tube of the tonearm should be parallel to the surface of the record.
If this is not the case, loosen both screws in the tonearm base just enough to allow vertical movement of the
arm pillar without force and slide the arm up or down until it is parallel.
Carefully retighten the screws without applying excessive force (which would deform the arm pillar) – finger
tight is quite sufficient.
Adjusting the azimuth
** The cartridge needle should be vertical when entering the record groove in order to
trace the groove wall modulations correctly.
A small screw at the bearing end of the arm allows incorrect azimuth to be corrected if
your needle is not mounted exactly perpendicular to the cartridge body (which
sometimes can be the case).
Release the screw just enough to be able to revolve the arm tube without applying
force. Please note: do not remove the screw completely!
With the aid of a good magnifying glass adjust the arm tube until the needle is vertical in the groove (i.e.
perpendicular to the record's surface). Ideally this should correspond to the top surface of the cartridge body
being parallel to the record surface.
When you are satisfied with the position of the needle retighten the screw carefully.
Under no circumstances should the arm tube be adjusted with the needle still in the record groove!
Irreparable damage may be caused to the cantilever suspension! The arm must be lifted to make
each adjustment and lowered afterwards to check it.
Anti-skating force adjustment
The anti-skating force must be adjusted corresponding to the downforce.
The anti-skating mechanism is calibrated from 0 to 5g. The anti-skating force should
correspond with the downforce.
Three examples of magnetic anti-skating mechanism:
a) Downforce – 1,5g; Anti-skating force 1,5g
b) Downforce – 1,7g; Anti-skating force 1,7g
c) Downforce – 2,3g; Anti-skating force 2,3g
© Pro-Ject Audio Systems · Pro-Ject RPM 3 Carbon / Ortofon 2M SILVER · Revision 2015.07.15
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