| Short description of the features | The system is based on a 89C51ED2 Microcontroller |
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Computation of position (without PC) of moon,sun,Cygnus,Sagittarius,Cassiopeia,Taurus,Leo and Aquarius |
Demo - Version of the controller system
Digital position encoders you can get from http://www.usdigital.com . Look for the type A2-S-S, it has 0.1deg resolution and interfaces well to my system. A cheaper but probably less accurate solution is the MAB25 from Megatron with also 0.1deg resolution: http://www.megatron.de/export/Contacless__analog_Sensors/MAB25/mab25.html |
| - | Azimuth and elevation motor controlling for all targets plus two free choice positions | |
| - | Transmission of antenna position via LAN cable from antenna down to the controller in the shack | |
| - | Interfacing with
different absolute encoders is possible: 10..12bit A2-S-S, MAB25, .... |
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| - | Selectable stepsize for tracking | |
| - | Selectable offset for azimuth and elev. up to +/- 9.9 deg | |
| - | Motor control output clw/ccw up/down | |
| - | Local operation by 4
buttons at controller, non volatile storage of all
parameters ( remote operation by PC is possible) |
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| - | Real - Time - Clock | |
| - | 4 x 20 character LCD - display | |
| Main
advantages: PC is not necessary for controlling (no interference!), single wire line from antenna (encoders) into shack, ready within a few seconds |
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HEX - FILE FOR CONTROLLER : Nov.09: for using the controller in southern hemisphere: 1.)bug showing up in setup fixed 2.)antenna moving now smoothly via north eme_contr_jfl_v11.hex June09: eme_contr_jfl_v10.hex
BRD - FILES FOR PCBs : DOC FILE WITH DETAILED DESCRIPTION: VIDEO OF THE CONTROLLER WORKING: A model of a parabolic dish is controlled by the system. There is no difference for the interface board if DC motors with 5W or 50W are connected. Maybe some heatsink is needed for the motor drivers at higher power.
AVAILABILITY OF CONTROLLER MODULES / PCBs I will not provide myself PCBs or completely built
modules, but kindly HB9DRI (member
of HB9Q group) will do so. hb9dri(at)emeham(dot)com
Alex has written an additional very useful documentation how to test, install and interface the system to the antenna. |
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