16.5 inch RA drive on an Aeroquest Mount with a computerized drive from Astrometric Instruments. This drive achieves better than 2 arc second periodic error tracking without pec.
	New !! Stepper motor, power supply and hand paddle with programmable parameters for the motor to give various  micro steps and speed ranges. Speed is controlled by a simple potentiometer. Buttons provide correction for astrophotography. Switches are for on off and direction. This example is single axis control. Dual axis is also available.
	An example of a 1-3/4 inch 1 piece worm mounted between Timken tapered roller bearings with a simple backlash adjustment by one screw for exquisite tracking capabilities and smooth operation.
	NEW !! Programmable stepper motor with belt drive. Simple and inexpensive.
	This is a custom made Aeroquest mount fully computerized to fit a 17.5 inch Ritchey Chretien reflector. It is a beautiful powder coated mount that is extremely stable for its weight. Tracking is accurate to 2 arc seconds without pec being used. Computer Mounts   ASTROPHOTOS

                                Dual axis drive controller                                                           Off - axis guider / focuser