audible science
audible science
page 32
INSTALLATION & SETUP
CONT.
DISTANCE OF SPINDLE TO CENTRAL ARM TOWER
We recommend you use 4mm Socket Head Cap Screws
and professionally drill and tap the plinth or armboard to
allow the arm to be bolted directly to the plinth.
The 4 equispaced holes need to be drilled on a 56mm
PCD (Pitch Circle Diameter) to suit M4 screws. We
recommend these 4 holes are drilled cardinally (North
South East West) but depending on your unique
installation these can be drilled in any orientation that
clears infrastructure obstacles.
Note: If the plinth requires a cutout to access a
sub-chassis then the main arm mount requires a
72-80mm hole to be cut to allow for clearance.
Once you have drilled and tapped the required holes you
can bolt the Central Arm Tower down. You are now ready
to place the main arm mount and crossarm with pivot
assembly on to the Central Arm Tower and lock down the
Spindle to Pivot or overhang distance.
INSTALLING
& TUNING
YOUR COBRA
VTA thumbscrews
Vernier scale
