Loading ...
Loading ...
Loading ...
109
3.2. MOTOR FOCUSER SYSTEMS
The more mechanically precise is your focuser is,
the better ROTARION AUTOFOCUS
repeatability, and the better autofocus results
you will get. As an example, a standard Crayford
focuser can be less precise (due to shaft
slippage, etc..) than a focuser with rack-and-
pinion.
The more mechanically rigid the attachment is
your motor to your focuser, the better focusing
results your will get too. A direct motor to
focuser connection without elastic parts or
brackets that have flexure it produces better
repeatability.
A stepper motor is highly recommended due to
the motor type inherent precision over a
standard DC motor. Although the ROTARION
AUTOFOCUS powering a DC motor with a high-
quality rack and pinion Crayford focuser such as
the TeleVue, will produce excellent results.
3.3. CRAYFORD AND RACK-AND-PINION
FOCUSERS
For Crayford focusers and rack-and-pinion
focusers found in most refractor and Newtonian
telescopes, there is an easy mechanical
repeatability test to validate your telescope
Loading ...
Loading ...
Loading ...