RE: [CAD_CAM_EDM_DRO] mouse encoder?

Some of the trackballs use a "spotted" ball and optical sensors to determine
motion. Other mice that I've seen use a rubberized bearing as the ball and
actually turn potentiometers or similar sensors. I had one of these as the
"integral" track ball of a notebook computer. It wasn't all that accurate,
even for moving the cursor around. I surely wouldn't trust it with a
machine.

-- Jerry

| -----Original Message-----
| From: JanRwl@... [mailto:JanRwl@...]
| Sent: Monday, August 20, 2001 11:22 PM
| To: CAD_CAM_EDM_DRO@yahoogroups.com
| Subject: Re: [CAD_CAM_EDM_DRO] mouse encoder?
|
|
| In a message dated 20-Aug-01 22:17:30 Central Daylight Time,
| timg@... writes:
|
|
| > Non-optical mice (the type with a ball) use 2 quadrature
| optical encoders to
| > read the movement. Very low resolution, but certainly an
| inexpensive source
| >
|
| OPTICAL? You mean MAGNETIC, no? All the mouse-balls I have seen are
| plain-black all over (now, don't get nasty!), no "stripes", etc. No
| photo-transistors. Just Hall-effect sensors.
|
| Or, is there some Jordian magic I won't know of in this Century, yet?
|
|
| [Non-text portions of this message have been removed]
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