Hello, many thanks for releasing this! Its nice to havw a mckibben muscle that looks so well made! Do you have a definite list of reccomended parts and dimensions? Buying the parts for an exosuit soon but I dont want to mess up the parts list!
The force and stroke of the actuator depend on the dimensions of everything. As seen in the video, the stretching of the sleeve is not so regular when it's to large. Because the parts are cheap, I recommend buying a few sizes and trying some things out. As a reference, I used the same diameter of silicone tube as the coupler was made for (OD 8 mm, ID 5mm) and the sleeve that worked best is a bit smaller, 6 mm.
Thanks, I used these but the price depends on how many you buy (unit price + shipping) so another seller might be cheaper for you. a.aliexpress.com/_mrSVTQQ a.aliexpress.com/_mPYiveO
I've thinking of making these for while now. How much weight do you estimate this will be able to pull? And could you make them proportionally controlled with proportional valves?
There are some formula's online on how to calculate the force, but of course it can also be measured, for this muscle (inside diameter 6mm) I expect a force of a few hundred newtons. I think it should be possible to control it proportionally.
@@stijnsprojects but brother nylon has more strength than plastic and also nylon is not that much expensive as compared to carbon sleeve so i will use nylon sleeve
Very good, a clean and neat solution. You could possibly add a bracket behind the securing nut to act as an anchor point.
Yes, I tested that and it works great.
Hello, many thanks for releasing this! Its nice to havw a mckibben muscle that looks so well made! Do you have a definite list of reccomended parts and dimensions? Buying the parts for an exosuit soon but I dont want to mess up the parts list!
The force and stroke of the actuator depend on the dimensions of everything. As seen in the video, the stretching of the sleeve is not so regular when it's to large. Because the parts are cheap, I recommend buying a few sizes and trying some things out. As a reference, I used the same diameter of silicone tube as the coupler was made for (OD 8 mm, ID 5mm) and the sleeve that worked best is a bit smaller, 6 mm.
Awesome project. Do you have a link to the compression fittings and tube that you used?
Thanks, I used these but the price depends on how many you buy (unit price + shipping) so another seller might be cheaper for you.
a.aliexpress.com/_mrSVTQQ
a.aliexpress.com/_mPYiveO
I've thinking of making these for while now.
How much weight do you estimate this will be able to pull?
And could you make them proportionally controlled with proportional valves?
There are some formula's online on how to calculate the force, but of course it can also be measured, for this muscle (inside diameter 6mm) I expect a force of a few hundred newtons.
I think it should be possible to control it proportionally.
Hello, how can I make the muscle bending? Like fingers
Yes, you can constrain one side of the muscle with a fibre so the length is fixed on that side causing the muscle to bend.
Can i use nylon sleeve instead of carbon
I also used a plastic sleeve, the camera makes it look a bit different.
@@stijnsprojects but brother nylon has more strength than plastic and also nylon is not that much expensive as compared to carbon sleeve so i will use nylon sleeve
what is the name of these metallic tighteners
I've not found a real name for them but I found them on AliExpress by searching for 'copper pneumatic fitting'