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i'm a little concerned about the strength of the servo where the servo horn (the round bit) joins the top servo gear. with this design there would at best a lot of wear on the top bearing and at worst the joint between the servo horn ad top gear would snap.
What material is the middle beam (thigh) made from?
Quote from: dunk on February 28, 2010, 05:49:24 AMi'm a little concerned about the strength of the servo where the servo horn (the round bit) joins the top servo gear. with this design there would at best a lot of wear on the top bearing and at worst the joint between the servo horn ad top gear would snap.the servo horn( the round bit) is actually fixed to the beam, the body of the servo will rotate thus rotating the leg.
yes, but i'm concerned how strong the servo is.
I think Dunk means the physical strength of the servo output wheel, bearings and gears.
here's some pictures of solutions to the problem:http://www.lynxmotion.com/images/jpg/asb033.jpg
Either that, or use linkages (ball-links and threaded rod) to take the load off of the servo.
Yep, that's what I was trying to say Dunk. The Lynx stuff is a good solution for standard servos. The 'force' we're concerned about the the bending moment of the servo shaft. Adding the second pivot point eliminates most of this bending force on the servo's shaft.
To reduce the friction, use the bearings that the Lynxmotion C brackets come with. -HyperNerd
I'm sorry I have no idea - I have never used these brackets before, I've only looked at them on the website.
ok, that's the top servo on the leg fixed.i'd still be concerned about the other 2.it all depends how strong your servos are.dunk.