[PLUG] Touch screen experience
Aaron Burt
aaron at bavariati.org
Mon Aug 13 21:49:40 UTC 2012
On Mon, Aug 13, 2012 at 01:00:26PM -0700, Wayne E. Van Loon Sr. wrote:
> Anybody out there had any experience using a touch screen as a
> replacement for mechanical pushbutton switches?
>
> This would be a touch screen upon which an operator would press one of
> several on-screen "buttons" depending upon the quality / grade of
> products in an inspection area.
Sounds like a typical touchscreen HMI setup. Sorry, didn't get that far in
my Industrial Controls training, and I don't have contact info handy for my
old instructor.
The impression I get (from reading lots of engineering magazines) is that
touch screens are used for occasional inputs, or ones that can be repeated
if the touch screen fails to register-- e.g. selecting info screens,
tweaking parameters or starting a process.
This would make sense, given the limited wear-resistance of touchscreens
as well as their poor performance with gloves and dirty hands.
For high-use and/or high-importance inputs, physical switches still rule.
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