Subject:
|
Re: Help please: I'm trying to get two outputs from one shaft
|
Newsgroups:
|
lugnet.technic
|
Date:
|
Wed, 28 Sep 2005 09:04:44 GMT
|
Viewed:
|
3563 times
|
| |
|
|
On 27/09/05, Tony Hafner <lego@nospam.hafhead.com> wrote:
> In lugnet.technic, David Wegmuller wrote:
> > In lugnet.technic, Tony Hafner wrote:
> > > I have one shaft that will be turned by a motor in either direction. And
> > > I want to get two different outputs, based on which direction the motor is
> > > turning.
> > >
> > > When the Input shaft turns clockwise, Output 1 turns and Output 2 does not.
> > > When the Input shaft turns counter-clockwise, Output 2 turns and Output 1
> > > does not.
> >
> > Hi Tony,
> > Here is something I put together real fast during my lunch break:
> > http://wegmuller.org/v-web/gallery/OneInTwoOut The movies are quite big
> > (4MB a piece) but they show clearly how this thing works... Notice that it
> > works in any position as the mechanism is balanced.
>
> This is great stuff, and will probably work for my application. It's
> mechanically much simpler than a differential with rachets. Thanks!!
>
> > An other approach to this is the "traveling worm gear": it relies on the
> > fact that Lego worm gear slide freely along cross axles. If you're
> > interested, I'll put one together tonight...
>
> I think I can picture how that works:
> You have a 4-stud-long box with a shaft running lengthwise with a single worm
> gear. At each end is an output gear. The worm gear slides along the output
> gears until it hits either end, and then starts turning that output gear?
>
> I wouldn't mind seeing an implementation of this, but don't knock yourself
> out.
>
> > Speaking of worm gears: if you need the non-rotating output to be locked
> > when it is not driven, you can always use a worm gear between this
> > mechanism and the application point.
>
> I may use the worm gear lock on one of the two outputs. The other one should
> be
> OK.
>
> --
> Tony Hafner
> www.hafhead.com
I will have to dig it out - but somewhere I have a fairly simple LDraw
file showing that sliding worm gear device.
I also made an interesting variation on this using Lego clutch gears
which allowed 2 motors to give 2 outputs each, plus an additional
third when both were going in a "forward" direction - it was something
I had designed to allow me to use the 2 output manas to drop a weapon
(like a hammer/axe) when a robot charged forward on both motors. The
return was merely gravity. I think I did an LDraw version of this
first.
Orionrobots
--
http://orionrobots.co.uk - Build Robots
|
|
Message is in Reply To:
7 Messages in This Thread:
   
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
