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KINEMATICS

KINEMATICS

KINEMATICS

(OP)
Hello,
 I made a model (Geneca wheel) consisting of 4 parts.
 Part1 = base part with 2 shafts
 Part 2 = driver wheel with 1 pin
 Part 3 = roller in the pin
 Part 4 = Geneva wheel with 6 slots   
 I am trying to simulate this model with 3 revolute joints
 (shaft axis + wheel axis and center pin + roller)
 and 1 prismatic joint (between a line and a plane on
 the roller) with a line and a plane in one slot of the
 geneva wheel.
 Of course, the base part is fix.
 When I simulate this mechanism, it works for one slot
 and after a certain angle of rotation, the Geneva wheel
 returns to it's original position...( it does not see the
 other slot).
 Is there a way to apply the prismatic joint to the other
 slot without over constraining the model ?
 Can you help me to find a solution so it will rotate for
 all the other slots

 Thanks

RE: KINEMATICS

hi,

i've just read your problem, and i figure out that you misanderstand some of the basic kinematiks rules: your slider cannot do the job because sometimes it should be ON and sometimes OFF. This cannot be ( or have fun with VERY ADVANCED knowledgeware).

So you gotta think differently and give the system the link between the 2 rotation, i mean a POINT on CURVE relation. It does work, but you will have a very pleasant time finding the right curve !! You even may have to cheat a little bit, but dont tell other..

i ve done it, it does work

Have fun,

Eric

catiav5@softhome.net

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