 WOT: mechanical engineering question |
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| TonyAKAVW |
 Oct 14 2004, 05:40 PM
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That's my ride.  Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None  |
I'm building a "roto-lok" system http://www.roto-lok.com/tech/technology.html
for the rotation of an antenna for amateur (ham) radio purposes. I'm trying to find an equation that relates the radius of a pulley/drum to the total friction. Basically I want to make sure that I put sufficient turns of wire around the drive shaft so that it does not slip. I've been searching on the web and I can't even really find equations relating tension to friction, etc. Any advice on where to look? -Tony |
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| TonyAKAVW |
Oct 15 2004, 12:30 PM
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That's my ride. Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None |
Its sort of for home use. Its more for mountaintop use. Microwaves travel a lot like light so you have to have a clear line-of-sight to the other station to communicate. So two weekends a year there's a contest and everyone goes up to mountaintops to see how far they can talk and to how many people. So it has to withstand soem abuse and still be accurate.
Here's a drawing of what it looks like currently... -Tony Attached image(s) 
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Posts in this topic
TonyAKAVW WOT: mechanical engineering question Oct 14 2004, 05:40 PM
john rogers If I remember my naval engineering correctly about... Oct 14 2004, 05:55 PM TonyAKAVW Well, lets say there is one turn on the large drum... Oct 14 2004, 06:07 PM TimT Lots of variables in this one
tension on the tail... Oct 14 2004, 06:12 PM TonyAKAVW Thanks! I'll do some searching with those... Oct 14 2004, 06:18 PM Carl Other approaches would be to use a chain & sprocke... Oct 14 2004, 06:26 PM MattR ugh, i just signed on to take a break from my stat... Oct 14 2004, 06:50 PM TonyAKAVW Actually this is for adjusting the elevation angle... Oct 14 2004, 07:17 PM F4i You could use coged belts. Like the kind used for ... Oct 14 2004, 09:06 PM groot Is this for home use? If so, I think I'd make ... Oct 15 2004, 06:03 AM
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