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Old 01-04-2016, 06:58 PM
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9W Monighan 9W Monighan is offline
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Join Date: Aug 2010
Location: Pittsburgh,PA.
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Default Re: 1/16 Bucyrus-Monighan Walking Dragline

Quote:
Originally Posted by thetractorfan View Post
RC draglines are rare and this is the biggest one I have seen. this machine looks like it can manoeuvre a lot of dirt. are you using a clutch system for the winches?
looks amazing, you did a really amazing job.
This machine in somewhat ideal conditions and swinging 90deg it can move a pile of dirt approximately 44" high in about 8-10hrs of steady digging. With damp sand that number would be higher.

There are no clutches, all 3 motors are: 100vdc PM motors individually driven by 4 quadrant regenerative drives.
The only clutch is the jaw clutch that engages from drag to propel motion.
Eventually I will build the brake bands so I can set the brakes when needed.

Thanks for the compliments.
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