JohnW,
I would be surprised if the scheme you describe could resolve to 0.05
degrees but technology continues to amaze me.
I was thinking that they are taking a linear caliper, bending the artwork
into a circle, and then bending the slider to match. The electronics might
not even have to change. It can't be much of a change for them to charge
less than $20.
Rick
-----Original Message-----
From: gingery_machines@yahoogroups.com
[mailto:gingery_machines@yahoogroups.com] On Behalf Of tjwal
Sent: Tuesday, September 06, 2011 7:13 AM
To: gingery_machines@yahoogroups.com
Subject: [gingery_machines] Re: new article: A Low Cost "Digital" Angle Gage
Rick
AFAIK the angle sensing is done with an accelerometer chip which utilizes a
weight suspended by a network of strain gages. Of course this is all in
nano-scale and built into a tiny little chip. As the chip is tilted the
strains change accordingly and you can calculate the change in tilt. A
similar design is used in chip based gyroscopes. For those who fly RC
helicopters these have been revolutionary.
JohnW
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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