Having some complications reproducing this in CAD, using SES. anyone done this before? tips welcome.
generally the reverse of the Biped scout Knee’s direction. I think the only reason why Jim designed the reverse knee was becuase it looks cool! 8)
Bassically the same as a regular knee joint, but reversed. Might want to look at the Scout for a better idea.
i have looked at the scout, but im just not the biggest fan of that 1 piece that holds 2 servos together, which allows a bent knee.
ive looked into other designs and thought about this some more, in order to do a forward knee its required you have 2 servos on the foot. one for vertical spin (ankle balancing) and the other, perpendicular to the ankle horn, to allow the knee to bend at any angle (basically this servo acts as a freespin point or a foot up and down pivot).
i’d show you what i mean using CAD, but alibre does not let me save nor export my work after 3-4 pieces have been inserted.
argh!
Anything like this?
img2.putfile.com/thumb/7/18503245645.jpg
img2.putfile.com/thumb/7/18503245661.jpg
This is my first attempt at anything like this, and just wanted to give something a try.
Input on this would be good as I might end up using something like this at some stage too.
I did think about putting another servo just above the knee, but then figured it would be overkill.
I tried to put servos in, but as I have asked elsewhere, I can’t figure out how to mate them to the servo bracket, so help there would be great also.
this is the thread
Not true. Did you register Alibre Xpress? You can have up to 15 unique parts per assembly after registration (nothing to buy) and I believe it is 10 unique parts before registration. Saving and export is not disabled.
8-Dale
something like the first one, I created something similar to that already before I realized it’s way too lifted above the foot, i dont know how this will affect balance or how itll look in the final product. might be good, might be not.
i have a new solution, ill post the render if I can get alibre to work after registering. the forward knee design is very stable, and it looks cool as heck!
I thought about how to get both joints closer to the ground, but couldn’t come up with a great solution, so just stuck with that.
This is one of the best ankles I’ve seen:
http://bing.sendphotos.com/TrialPath1/Bing//Photostories/KB2U80/3.jpghttp://bing.sendphotos.com/TrialPath1/Bing//Photostories/KB2U80/9.jpg
Have a look at it here.
But it would hard to make and fit onto the foot while still being able to bend forward.