Vixen AP Equatorial Mount Instruction Manual page 22

PREPARATION
Second Step: Balancing the Mount in Declination (DEC)
This should be done after you finish balancing in the R.A.
In case of a telescope tube with tube rings:
1
While holding the telescope tube, turn the counterweight bar (or telescope
tube) by hand until the counterweight bar is horizontal.
The declination body keeps the mount in position.
2
Release the telescope tube slowly to see if it remains in place.
If the telescope tube starts turning as you release it, you will need to shift
the telescope tube until it is balanced and remains in place.
Note:
Do not loosen the tube ring lock knobs too much in balancing.
This could cause telescope tube to fall and lead to injury.
3
Loosen the lock knobs on the tube rings that hold the telescope tube and slide the telescope tube either forward or backward until
it remains stationary.
4
Tighten the tube ring lock knobs securely to hold the
telescope tube in place.
Declination axis
Telescope tube
Stand still
22
Counterweight bar
Tube ring lock knobs
Tube ring lock knobs