Subject:
|
Re: Ping-Pong Ball Shooter
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Thu, 13 Jan 2000 21:18:02 GMT
|
Original-From:
|
The WordMeister <DWILCOX@WORDSMITHDIGITAL.saynotospamCOM>
|
Viewed:
|
529 times
|
| |
|
|
Hey, Dave, good to hear from you ...
Do you want me to forward all the Ping-Pong shooter messages so far?
I've thought about a catapult, but it presents some engineering
problems--but this is worth exploring; I've seen catapults over and over in
pictures and advertising and whatnot from TLG. The slingshot might work
(although it has some interesting issues as well), but both would be too
large, I think, to make practical. I've also thought about a rotary sling,
such as the one David used to kill Goliath.
Since I have 4 motors, I'm going to stick with concurrently developing the
circular batting device (my first design), and the wheels-as-accelerators
device (my second design). I think both are viable after some more
tinkering.
--Doug
-----Original Message-----
From: Dave Johnson <djohnson@sirius.com>
To: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Thursday, January 13, 2000 3:53 PM
Subject: Re: Ping-Pong Ball Shooter
> The WordMeister wrote:
>
> > I want to thank the list for such excellent suggestions. Here's a progress
> > report:
> Somehow the original post didn't make it to the list for me, and I don't
> see it on lugnet either...but this is a great project!
>
> A couple ideas that may or may not have been put forth yet (and may or
> may not be useful):
>
> A catapult sort of thing, either motor-driven or rubberband driven (in
> the latter case, you'd need to "cock" it with a motor - a "pull back and
> let go" sort of gearing mechanism could work for this, perhaps). This
> would look really cool, but would be bulky, I suspect.
>
> A slingshot. Again, you'd need to use a motor to cock it, but you could
> certainly get good ball velocity this way.
>
> Just some thoughts, I'm looking forward to the initial message(s)
> catching up with lugnet.
>
> Dave Johnson
> Still Unbalanced
>
|
|
Message has 1 Reply:
 | | Re: Ping-Pong Ball Shooter
|
| I prototyped a catapult design several months ago that used two motors to "cock" and fire/launch a rubber-band driven ball-launcher. The loading/firing sequence was something like: 1) load ball on catapult. 2) power motors in reverse at low power (...) (25 years ago, 13-Jan-00, to lugnet.robotics)
|
2 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
