Subject:
|
Re: SSClagorpion
|
Newsgroups:
|
lugnet.technic
|
Date:
|
Wed, 5 May 2004 13:08:19 GMT
|
Viewed:
|
12948 times
|
| |
|
|
In lugnet.technic, David Laswell wrote:
> In lugnet.technic, Steve Hassenplug wrote:
> > Here's a quick example of what I'm talking about.
> >
> > http://www.brickshelf.com/gallery/Hassenplug/Robots/SSClagorpion/leglock1.jpg
> > http://www.brickshelf.com/gallery/Hassenplug/Robots/SSClagorpion/leglock2.jpg
> >
> > Looks like it will work.
>
> It might not work quite as well as you seem to think. Locking mechanisms of the
> sort that you're considering have a little "pop" because they don't lock at
> their point of greatest extension.
I thought about this. The two pieces that "lock" don't need to go beyond their
point of greatest extension. The reason for going beyond the PoGE is to lock,
so nothing else is required to hold it in place.
However the pneumatic piston will be holding it in place (keeping it locked).
As long as the braces are in line, there is very little force on the piston.
Also, I'm pretty sure, as you said, the piston has the most leverage on the
braces (and the whole leg assembly) when it's close to locking. So if it does
have to lift any weight, because of flex in the other legs, that's the best
time.
The joint will be weakest when the leg is at it's highest point off the ground,
but there, it's only lifting the weight of the leg.
This is easy to see with the assembly I made, because the legs travel very
little distance, as the piston approaches the bottom of it's throw, but they
move a great deal when it's at the top (extended, in the picture).
Thanks for helping think this through.
Steve
|
|
Message has 2 Replies:
 | | Re: SSClagorpion
|
| In lugnet.technic, Steve Hassenplug wrote: Here is my first attempt at a locking leg, locked in the down position. (URL) is the leg lifted off the ground: (URL) is the leg down, with the sidewalking piston contracted. (URL) lock mechanism allows for (...) (20 years ago, 5-May-04, to lugnet.technic)
| | | Re: SSClagorpion
|
| (...) So what happens if one set of legs manages to lock, but doesn't want to unlock, while the other set of legs never locks at all? It's possible that the front/back leg pairs will behave differently if the back legs are longer like on a real (...) (20 years ago, 6-May-04, to lugnet.technic)
|
Message is in Reply To:
| | Re: SSClagorpion
|
| (...) It might not work quite as well as you seem to think. Locking mechanisms of the sort that you're considering have a little "pop" because they don't lock at their point of greatest extension. In order to get the leg to lock into position, it (...) (20 years ago, 5-May-04, to lugnet.technic)
|
300 Messages in This Thread:
(Inline display suppressed due to large size. Click Dots below to view.)
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
