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CCTV Pan & Tilt as Az-El Mount
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<blockquote data-quote="s-band" data-source="post: 1023896" data-attributes="member: 407744"><p>The pot position feedback is nice as it is absolute but I wanted to try it on a normal positioner and maybe an RC2000 so I've added pulse outputs. I drilled nylon spacer to interference fit on the back of the motors and fitted chopper wheels and optical sensors. (no, they are not held on by Blue Tack, it's epoxy putty). The most awkward part was keeping all the wires out of the way of the chopper wheels when I put it back together.</p><p></p><p>[ATTACH]109545[/ATTACH]</p><p></p><p>I managed to slow the motors down by using an audio amp and LF source to generate 10-60Hz at 10-25V. It works well at 1/2 speed (25Hz) by gets a bit feeble and/or shaky at 1/5 (10Hz) speed. 1/3-1/2 speed is a good compromise. To switch the motors from +/-36V I used 4x zero-volt switching solid state relays and some diodes etc. The zero volt switching reduces the thumps a bit when starting and stopping. The 36V is only low current in this set up. I tried it using a Uniden UST-771 and it works fine.</p><p></p><p>[ATTACH]109546[/ATTACH]</p></blockquote><p></p>
[QUOTE="s-band, post: 1023896, member: 407744"] The pot position feedback is nice as it is absolute but I wanted to try it on a normal positioner and maybe an RC2000 so I've added pulse outputs. I drilled nylon spacer to interference fit on the back of the motors and fitted chopper wheels and optical sensors. (no, they are not held on by Blue Tack, it's epoxy putty). The most awkward part was keeping all the wires out of the way of the chopper wheels when I put it back together. [ATTACH]109545[/ATTACH] I managed to slow the motors down by using an audio amp and LF source to generate 10-60Hz at 10-25V. It works well at 1/2 speed (25Hz) by gets a bit feeble and/or shaky at 1/5 (10Hz) speed. 1/3-1/2 speed is a good compromise. To switch the motors from +/-36V I used 4x zero-volt switching solid state relays and some diodes etc. The zero volt switching reduces the thumps a bit when starting and stopping. The 36V is only low current in this set up. I tried it using a Uniden UST-771 and it works fine. [ATTACH]109546[/ATTACH] [/QUOTE]
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CCTV Pan & Tilt as Az-El Mount
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