Origin Live All MK3 Decks - Manual (Page 6)

Page 6
S E T T I N G T H E M O T O R S P E E D
Please note that the belt grips differently on one side to the other. This
is important because it means the deck will run at a slightly different
speed if you refit the belt inside out from previously. Therefore when
removing and refitting the belt take care you replace it with the same
side in contact with the running surfaces or you will need to reset the
speed.
You will need to set the motor speed yourself. In the first 72 hours
of continuous running the motor, the speed tends to drift but then
settles down permanently. You can listen to the deck from the outset
but remember to reset the speed after the 72 hour run in period and
then check again after a month.
Motor “running in” should be carried out with platter turning
(no faster than 45rpm).
The thin output wires from the transformer only carry a very
low voltage and are therefore safe to handle. Voltages inside the
transformer are dangerous so the transformer case must not be
unscrewed or opened.
(At front or
When the rotary switch on the pod is turned fully anti-
clockwise and the line on the knob aligns to the LED, the
motor is off.
One click of the switch clockwise is 33.3 rpm - The
second click clockwise is 45rpm
NOTES: The speed should only be finally set with
the pod in it’s FINAL position and at normal room
temperature as speed varies slightly with belt tension
and temperature.
Only set motor speed after it has been plugged in for
over 1 hour as it takes a while to warm up.
If you move the pod, you will need to re check the
speed and if necessary correct it, by repositioning the
pod till the speed is correct.
This is a quick operation, just
leave the motor and platter spinning, as you slide the pod to
adjust tension. Always set the speed with the cartridge dragging
on a centre track of a record. The drag can affect speed setting
to a small degree. Do not move the pod beyond the ideal
distances mentioned in “fitting the belt”.
If you change transformer to the upgrade transformer may
need to reset the speed.
If the speed drifts significantly then correct it using the speed
adjuster screws.
Instructions for reading the strobe
Place the strobe disc on the record to be played. Play the record
and watch the relevant ring on the disc. Adjust the speed
until marks on the ring appear stationary while the record is
rotating. It sometimes helps to stare at infinity whilst doing
this as the marks become easier to see. You can see the strobe
effect in fluorescent light, although an ordinary bulb held
about 2 feet from the strobe disc will also work fine. The bulb
flickers at 50 Hz in the EEC and 60 Hz in the USA.
You can purchase bayonet fitting fluorescent or halogen bulbs
to fit normal lamps. Try to shut out daylight when carrying out
speed setting. Also be aware that energy saving lighting with
switch mode high frequency power supplies or certain energy
saving bulbs will not work with the strobe disc. Either use an
old fashioned lamp or invest in a KAB strobe which can be
found on our web site under vinyl measurement accessories.
Set the speed
Set the switch on the pod to the first click i.e. 33 rpm
setting. Adjust the motor speed as follows: using the small
screwdriver, turn the speed adjuster screw shown in the photo
for 33 rpm. This is accessible through the hole (furthest to
the right hand side) in the side of the pod and the slots in the
screw heads are visible if you look into the holes (See diagram
at start of this section).
To increase speed, turn the screw clockwise until the speed
changes. If the screw reaches the end of it’s travel you can
usually hear a faint clicking. You will not damage the speed
trimmer by over turning, as slippage occurs. The trimmer
screw will not fall out. The trimmer screw is adjusted at factory
so should only need fractional adjustment of less than a turn.
However the capacity is 25 turns and in some cases more turns
may be required to set the correct speed.
Setting the 33.3rpm. When setting the speed, place the arm
on the centre track of a record, so that the cartridge is tracking
the grooves. This ensures that the drag of the cartridge is taken
into account. Speed variations of up to plus or minus 1% are
quite common on decks and the dc motor is capable of plus or
minus 0.1% accuracy. Use the strobe disc provided to set the
speed (full instructions are on the card).
Click the rotary switch to the 2nd click clockwise and
set 45rpm speed (or 78 rpm if you wish) using the same
procedure as for 33rpm.
The dc motors can be slightly noisy initially and are never
completely silent in comparison to a/c motors. This may be
due to the precious metal brushes. However it is the much
lower levels of vibration that is important not the audible noise
and this is why they are great deal better in performance terms.
Like most turntable manufacturers we recommend that you
leave the turntable running between changing records as this
reduces the belt wear that occurs with constant stopping and
starting.
N O T E S O N M O T O R & S P E E D S E T T I N G
-Do not use the power supply for anything other than the dc
motor or the power supply is highly likely to be irreparably
damaged and you could also damage the equipment you are
plugging it into.