Quote:
Originally Posted by texken
No on winch.
Was looking at the winches they use on 4x4 jeeps.
Or just make one up.
Texken
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I would think about using servos modified for continuous rotation. All you have to do is plug them into your receiver and they will operate just like a hydraulic winch. Modifying them is easy, but I'm not sure if you can modify all of them. Metal gears are good and double ball bearings are a must. I think Smallhaul or Stuff knows where to get servos already set up for continuous rotation.
To chose a servo, just figure out how much weight in ounces you want the winch to pull, then multiply that by the radius of the core of your winch drum and that will give you the inch/ounces of torque required and then chose a servo that has at least double the torque (a little is good, a lot is better) so you don't burn it up. If you want to lift 320 ounces (20 lbs) with a four-part line, then you need a line pull of 80 ounces. So, if your drum core is .75" diameter, the radius is .375"; then 80 X .375 = 30 in/oz required so you need a servo capable of at least 60 in/oz.
And to make sure it has the right speed, take the time/60 degree rotation spec and multiply by six and then divide 60 by that number to get rpms. If a servo has a .18 second for 60 degree rotation, then .18 X 6 = 1.08 seconds per revolution. 60 divided by 1.08 = 55.55 rpms. Since the drum core has a diameter of 3/4 inch, the circumference is 2.35". 55.55 rpms X 2.35" circumference = 130 inches/minute of line speed.
You probably already know how to do the math, but if anyone else wants to know, that's how I do it.
03-01-2011, 01:45 PM
Re: LTM 1030 update
Hybrid Mode
