Oh, quite difficult to say, but I think that something with the present radius
and curvature would be all right, because the reading finger has been able to
place conveniently on the plate.
While the length and the thickness of our fingers do vary, this is always some
kind of a compromise. When comparing a concaved and a non-concaved Braille
display, I do consider a concaved one as ergonomically better than a
non-concaved one.
On Fri, 1 May 2015, C. Pond <cpond@xxxxxxxxx> wrote:
Are people satisifed with the radius of curvature of the present finger
plate, not that we have anything with which to compare? Would people prefer
a very slightly wider finger plate, or perhaps one with slightly deeper
concaveved surface where the reading finger goes, or one with a different
radius of curvature?
I’m way behind in my e-mails, reinoud, and in everything, but yes to answer
at least one of your questions for now, I do have several displays. I’m
now going for finer and finer resolution and the fine tuning of what is
already good, but I feel could be even better. For just one instance, the
waveform simply propagates through the resonating coils, and this works just
fine; the user wouldn’t know the difference nor care. However, I believe I
can improve the tactuators’ design even more so and reduce power of over
300-plus actuators (I call them tactuators) per display by optimizing the
phase relationship between the coils, rather than simply letting the waveform
propagate according to its native parameters.
Just one of another next step is to have machined (and that is being done) or
to have modified special side cutters to properly trim the tactile pins
according to the radius of curvature of the finger plate. The design of a
finger plate is not trivial. It has att least 8 clear functions for a
well-designed optacon, so until something automated is done, specially-shaped
cutters will serve better than standard albeit tiny side cutters.
So what do people think about the radius of curvature of our present finger
plates where our reading finger goes?
Thank you for feedback,
Charles
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