On any mount the clutches should be loosened whilst moving the scope or the mount by hand, and then tightened when the desired position has been reached. If the motors are operated with the clutches loose, nothing
will happen. The motors will turn, but will not be driving anything, so
the clutches must be tightened when slewing.
With computerised scopes, the clutches should not be loosened during
an observing or imaging session, as the scope will lose it's position in the sky, and will not be able to take you to a selected target.
Most focusers have four screws underneath [ between the two focuser knobs ] which can be nipped up equally in turn to stop the focuser slipping.
raymo
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