i need help to model a prosthetic finger which is actuated by a string so by hoisting the string the two phalanges of the finger open from closed position. Any idea would be appreciated
Sure, the equation driven sketch is what makes it look like drawing the string articulates the joint.
In actuality, you create a manipulator part that you position and mate with rack-and-pinion mates to rotate the knuckles when you drag it.Since the string is a fixed length, you need an equation that adds or subtracts from the last joint depending on the arc-length of string on the pulleys.Here's a video showing the basic assembly, rack-and-pinion mates, string sketch and using the equation to maintain a fixed length
I also attached the assembly shown in the video.
Let me know if you have questions.
Why don't you mark-up a screen shot of the device so that we can see how it's supposed to move.
Thanks for your reply
OK, I see what you're after. You might be able to simulate that with an assembly chain pattern or maybe a belt system with traction mates.otherwise, you're going to need to create an equation driven sketch with a manipulator part related to the pivot points with rack and pinion mates.
Could you explain more about the equation driven sketch ?
Sir ur work is amazing and thank u for effort. unfortunately, the attached file is not opening with me as it seems u use a future version of SOLIDWORKS. so would u mind if u send me the steps u made to achieve this assembly. Thanks again for ur effort.
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