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In lugnet.technic, Duane Hess wrote:
> In lugnet.technic, Chris Phillips wrote:
> >
> > You also might check out a construct called a Directional Transmission. This is
> > a simple setup using a sliding worm gear that does pretty much what you are
> > describing. Michael Powell has a web page describing his design that I used
> > successfully to build a robot arm that used a single motor to perform two
> > actions: (1) grip+release and (2) lift+drop.
> >
> > http://www.sonic.net/~rci/transmission.htm
Well, I think this is going to work. Do you have any pictures of the
logic/gearing used downline from the transmission? I am concerned with how the
worm gear makes the transition from front to back and the resulting interaction
with the drive gears. I only have MLcad until I can get home from work to play
with the real brick and experiment.
-Duane
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Message has 2 Replies:
 | | Re: One Input - Two Outputs?
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| Hi! Here's something at Brickshelf that might, or might not, be of help: (URL) pretty compact. Although it feels like a dif. and a couple of ratchets would do the same thing (but not what you're looking for). (21 years ago, 13-Nov-03, to lugnet.technic, lugnet.robotics)
| | | Re: One Input - Two Outputs?
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| (...) The key to making this work is to ensure that there is tension at either end of the run that keeps the worm gear at one end of the axle or the other until it hits a hard stop. For example, my robot arm uses rubber bands to hold the gripper (...) (21 years ago, 13-Nov-03, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: One Input - Two Outputs?
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| (...) That's one of the links I was trying to find the other day! Thanks. I'm not sure if it will do what I want, but I'll have to stare at it a while to find out. Keep the ideas coming, if there are more. -Duane (21 years ago, 12-Nov-03, to lugnet.technic, lugnet.robotics)
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