Origin Live Resolution Classic MKI - Manual (Page 16)

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become detached if excessive force is used to manipulate them.
Arm & cartridge set up
Fit the cartridge (if not fitted already)
Fit the cartridge to the arm using an alignment gauge and ensure the headshell wires are bent so that they are clear of the
record surface. If you are not familiar with fitting cartridges then please read the section “Hi-Fi Cartridges – Setting up
procedures”.
Set tracking force & side force bias
TRACKING FORCE
Set the tracking force to the manufacturer’s recommendations using a stylus force gauge (stylus balance).
On all modified arms, Silver, Encounter Illustrious and Conqueror set the tracking force by sliding the counterweight
along the rear stub until the required tracking force is attained, then clamp up the grub screw in the side. When adjusting
the counterweight, set it so that the Allen bolt is at the side of the arm (not at the top) see figure “Rear end view of
counterweight” . You will need a stylus force gauge to measure the force underneath the cartridge tip.
HINT - In conducting this operation it helps to just lightly “nip” the allen bolt in the side of the counterweight onto the
stub – this way the counterweight has a little friction to hold it in position as you slide it backwards and forwards. Once
you have set the tracking force correctly you can firmly tighten the allen bolt in the counterweight to secure it tightly to
the rear stub then check that the tracking force is still correct after tightening.
On the OL1 tonearm which has not been modified (i.e it has a plastic rear stub with spiral groove) – You should turn the
counterweight till the arm balances level – once this is accomplished you can then set the tracking force by turning the
counterweight – half a turn = 1 gram.
Rear end view of counterweight AND ARM MOUNTING
GRUB SCREW POSITION
IS HORIZONTAL
PLINTH OR ARMBOARD
BALL BEARING
ALLEN GRUB SCREW
ALUMINIUM SLEEVE VTA ADJUSTER
THREADED ARM BASE
ARM MOUNTING PLATE
(ARMBOARD)
Use of Stylus force guage
Most stylus force gauges work on the same principle as a set of scales or balances. For example with the Ortofon Stylus
Force Gauge, first place the stylus on the inscribed or graduated portion of the scales. Then try the stylus at different
points until you find the point where the beam “balances” freely in a roughly level position. You then read the force that
is being exerted –( 1gram = 10 mN if the scale is in mN). From this number you can assess whether you need to
increase the tracking force or vica-versa. Move the tonearm counterweight accordingly and re-measure the tracking
force. Repeat this procedure until the correct tracking force is obtained. The Shure stylus force gauge works slightly
differently so follow the instructions that come with the gauge.
SIDE BIAS FORCE
Once the tracking force has been set you can set the sliding control for tracking bias - This should be set to a value of
approximately 1 or less due to the fact that the bias adjustments on Rega arms and similar arms tend to under-read the
true value of side force produced. . The settings you read on the Rega, OL1 or Silver arms are not always dead accurate
so it may be worthwhile to fine tune the setting using the following method. Find a test record or a record with approx
10mm of blank vinyl between the end of the lead out groove and the record label. Place the stylus needle on the blank
uncut vinyl and see whether the needle skates inwards towards the centre of the record or outwards. You are aiming to
achieve a situation where the needle drifts slowly towards the centre of the record so adjust the side bias until this state is
reached.
As the stylus tracks across a record it experiences forces that tend to push it towards the centre of the record. To