Possible Solution For Haptic Feedback Glove

"KaTsuoo1" wrote:
When a finger touch a virtual object, it adds resistance to the band that goes on top of the finger, which causes the cup to be pressed against the tip of the finger. The rings would be tight enough so that the tips doesn't immediately pushes in to the cup, but the rings would also be loose enough so that they can slide back once resistance is applied.

Haptic Feedback.gif

I did something similar a few years ago. The backs of your knuckles get sore rather quickly when tension is applied, so I threaded the cords (nylon fishing line) through hollow tubes (coffee stirring sticks) routed to take the pressure off the knuckles. I never did get around to replacing the finger-pull loops with my R/C hobby servos I bought for that purpose. Some day RSN...

This was just discussed a few days ago in another thread (where you can find more useful related info):
viewtopic.php?f=26&t=7959#p108989

"geekmaster" wrote:

"KaTsuoo1" wrote:
When a finger touch a virtual object, it adds resistance to the band that goes on top of the finger, which causes the cup to be pressed against the tip of the finger. The rings would be tight enough so that the tips doesn't immediately pushes in to the cup, but the rings would also be loose enough so that they can slide back once resistance is applied.

Haptic Feedback.gif

I did something similar a few years ago. The backs of your knuckles get sore rather quickly when tension is applied, so I threaded the cords (nylon fishing line) through hollow tubes (coffee stirring sticks) routed to take the pressure off the knuckles. I never did get around to replacing the finger-pull loops with my R/C hobby servos I bought for that purpose. Some day RSN...

This was just discussed a few days ago in another thread (where you can find more useful related info):
viewtopic.php?f=26&t=7959#p108989

What is your take on something that would be inside of palm...
Like small cell honey comb type or some other small cell based device... think of wad of deflated airbags where computer tells which airbags will inflate to mimic/form shape of 3d object.
Regards!

"JohnyX" wrote:
... What is your take on something that would be inside of palm...
Like small cell honey comb type or some other small cell based device... think of wad of deflated airbags where computer tells which airbags will inflate to mimic/form shape of 3d object.
Regards!

Like I mentioned in that linked thread, I am currently a fan of soft robotics (inflatable custom compartmentalized bladders and such) when mechanically manipulating body parts. So you are thinking along the same reasoning here, which is great for meme sync.

I wouldn't say that soft machinery would be safer than hard one because you would build it to acheive the same strength, and this is what ultimately matters. Soft machinery only look safer, but since it applies the same force, it's equally dangerous. It's also harder to constrain their physical motion - with hard frame you can just install a stopbump and it will reliably restrict the mechanisms from going any further. I'm yet to see how this would be possible with soft inflatable mesh.

While they cheaper, they're also much less reliable obviously, due to massive stretching load, an air muscle will not survive nearly as long as pneumatic piston servo. It could be good idea to use them with little force application such as relief haptics, but where you need forces big enough to constraint your finger movements you'd need hard machinery. I don't think pneumatic machinery will even be applicable for "macrohaptics" come to think of it, it needs to be electically driven motors.

"raidho36" wrote:
... I don't think pneumatic machinery will even be applicable for "macrohaptics" come to think of it, it needs to be elecrtically driven motors.

I did buy 70 electric hobby servos of various torques to use for this haptic glove project. They are still in storage waiting to resume this project. For now my prototype is powered by pulling on loop tied at the end of the cords.

It was quite effective, but like in the prototype idea in the first post here, it made for sore knuckles where the threads applied pressure. The coffee stirrers (used to form bowden cable segments) helped remove much of that pressure, but not all of it.

There are places in exohaptics where I think pneumatics would be appropriate. For example, an exoskeletal version of the shadow robot hand:



http://www.shadowrobot.com/products/air-muscles/

Air muscles are generally lighter and cheaper than electrics, and limits can be imposed for them too. Sure they can wear out, but just make them easy to replace...

Not glove, but interesting things

"Davideus" wrote:
Not glove, but interesting things

The novint falcon is great but won't give you the fidelity of a glove. That said, it's actually pretty powerful and realistic for feeling when you've hit something, or something hits back.

The OP's idea sounds exactly like the Gauntl33t Lance haptic glove: https://www.youtube.com/watch?v=U4hrX_OFsE8