| Need some advice from a EE type [message #259622] |
Thu, 21 August 2014 16:03  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma:
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Senior Member |
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Some of you may remember the electric table I had in Montgomery.
http://www.gmcmhphotos.com/photos/g6475-table.html
It worked fine but took 3 minutes and 7 seconds to fully lift. Not optimal.
In my search for a faster solution, I ended up with a Harbor Freight 2500 lb winch. A bit overkill but it was cheap and certainly powerful enough.
Got everything wired up with the limit switches working and everything. The problem is that it is now TOO fast...8 seconds to be exact. I've gone to a double pulley system (think block and tackle) and that doubled the time from about 4 seconds in a straight pull. I could go to an additional set of pulleys but I'd rather try and slow the motor down.
This is a 1 HP (chinese HP) 12V motor on #10 wire with a 60A breaker in line....WAAY overkill. I put my AmpProbe on the hot wire and get 5 Amps when the motor is running. So here is the question. If I put a 'resistor' in the circuit, what would it take in terms of Ohms to slow the motor down by 50 ish% AND handle the 5 Amps. This is going to be very intermittent usage except when I'm showing off. That is to say, up, eat, down.
Comments and advice solicited. Even from (gasp) non-engineers.... 
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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