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- From: zyzzy@stein.u.washington.edu (Zyzzy Galore)
- Newsgroups: sci.virtual-worlds
- Subject: Re: TECH: Question about DHM
- Date: 25 Jan 1993 23:36:34 GMT
- Organization: University of Washington, Seattle
- Lines: 33
- Approved: cyberoid@milton.u.washington.edu
- Message-ID: <1k2stoINNn2i@shelley.u.washington.edu>
- References: <C19r9x.5yB@mentor.cc.purdue.edu>
- NNTP-Posting-Host: stein.u.washington.edu
- Originator: hlab@stein.u.washington.edu
-
-
-
- Russell Holt writes:
-
- > I've seen pictures of the Dextrous Hand Master, but I'd like to ask anyone
- >whose actually used one about it. On the back of the hand sits a base to
- >which the devices measuring the fingers and the thumb are attached.
- >This, then, is somehow attached to a wrist strap. My question is,
- >how does this base stay pressed against the hand? How does it keep from
- >rocking up and down when the fingers are moved only slightly? In my
- >attempts to construct a glove which measures finger movements in a
- >mechanical fasion, I have run into this problem, and am finding it
- >difficult to prevent this while keeping it comfortable...
-
- I had the privilege of trying out the dextrous master at Rutgers
- Telerobotics Lab last summer. (See "Ball in Hand," Pix-Elation #4,
- the VRASP newsletter.) The base to which the pneumatic micropistons
- are attached is not on the back of the hand, it's in the palm. It is
- affixed (in some manner, maybe glued) to a DataGlove. The three
- pistons mounted on the base are then attached to the thumb and the
- first two fingers. Since the natural motion of the hand (grabbing,
- etc.) forces the pistons into the palm, there is not a problem with
- slippage unless the DataGlove does not fit tightly. This can happen.
- It results in the virutal hand being "sticky" -- you can't let go of a
- virtual object even if your hand is flexed open. However, it was
- clear that the problem is one of glove size and not glove design.
-
- If you want to see the whole article, email me.
-
- ---------------------------------------------------------------
- Zyzzy Galore > > > > > > > > > > > zyzzy@u.washington.edu
- ART NON PROG RESS / V R A S P
- ---------------------------------------------------------------
-