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DISH SETUP: Single sat, Multi-Sat & Motorised
Ajak Patriot
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<blockquote data-quote="ArloG" data-source="post: 1163357" data-attributes="member: 418555"><p>I have always liked those positioners. Time has proven that they are constructed very robust.</p><p>A strip, bead blast. Powdercoat or automotve paint with etching primer. Should bring it back close to new.</p><p>The motor and geartrain hopefully are in good condition. New brushes will do it well. I've had good luck getting close to the same brushes from the hardware store and carefully sanding them to size. Using copper impregnated brushes makes for long life.</p><p></p><p>Personally I'd stay away from a usals conversion. Versus a linear actuator, the geometry should stay close to the same through the arc and give you equal display counts between 2 degree spaced sats.</p><p>So finding and predicting where the next sat. is should be is very easy.</p><p>It's a fine candidate for an optical encoder with Schmitt trigger output. I've converted a few linear actuators to optical from reed switches.</p><p>Firstly trying a hall effect encoder and messing with magnet spacing. Although your....6? sector magnet would make a conversion to hall easy.</p><p>An optical sensor is perfect if you don't mind the work making an interrupter wheel. Garage door openers have them. Arduino kits and such have them.</p><p>I make mine with a Dremel and slitting saw. A drill press with an equally divided paper scale taped to the quill drive pulley.</p><p>Make a disc out of thin ABS, etc. Place the Dremel in a vice under the disc. Position it. And a metal pointer to make indexing the quill precise.</p><p>Move to a mark. Hold the pulley. And drop the quill over the disc. Let the cutter cut a slot. I've made 10-20 slots per revolution discs.</p><p>Or 3D print one if you have a printer.</p><p>Optical interrupters with Schmitt triggers are the way to go. Hands down.</p></blockquote><p></p>
[QUOTE="ArloG, post: 1163357, member: 418555"] I have always liked those positioners. Time has proven that they are constructed very robust. A strip, bead blast. Powdercoat or automotve paint with etching primer. Should bring it back close to new. The motor and geartrain hopefully are in good condition. New brushes will do it well. I've had good luck getting close to the same brushes from the hardware store and carefully sanding them to size. Using copper impregnated brushes makes for long life. Personally I'd stay away from a usals conversion. Versus a linear actuator, the geometry should stay close to the same through the arc and give you equal display counts between 2 degree spaced sats. So finding and predicting where the next sat. is should be is very easy. It's a fine candidate for an optical encoder with Schmitt trigger output. I've converted a few linear actuators to optical from reed switches. Firstly trying a hall effect encoder and messing with magnet spacing. Although your....6? sector magnet would make a conversion to hall easy. An optical sensor is perfect if you don't mind the work making an interrupter wheel. Garage door openers have them. Arduino kits and such have them. I make mine with a Dremel and slitting saw. A drill press with an equally divided paper scale taped to the quill drive pulley. Make a disc out of thin ABS, etc. Place the Dremel in a vice under the disc. Position it. And a metal pointer to make indexing the quill precise. Move to a mark. Hold the pulley. And drop the quill over the disc. Let the cutter cut a slot. I've made 10-20 slots per revolution discs. Or 3D print one if you have a printer. Optical interrupters with Schmitt triggers are the way to go. Hands down. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Ajak Patriot
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