Re: tool changer logic- mathematical challenge

There is only 1 opening, a semi-circle, which looks like a "C" and 4
sensors that trip on each side of opening. Not 4 "C" shaped openings.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, cnc002@a... wrote:
>
>
> In a message dated 8/12/2004 10:21:56 AM Eastern Daylight Time,
> snaggletto@c... writes:
>
> Given; a series of 4 optical sensors, spaced evenly @ 90 degrees
> around a circle.
>
>
>
> Why four, you only need one plus one to identify the first
position of the
> tool. Seems using four is a bit over complicated. The industrial
CNC routers
> which I service and install use the single sensor method. Then
all you have
> to do is get your logic to count from No. 1 and you can even have
the turret
> turn in both directions for more efficient tool changing by simply
keeping
> up with the current tool in the spindle using the memory in the
control. No
> need to worry about the number of degrees contained within the
4 "C" shaped
> openings. All you need is one single tab for the sensor to pick
up.
>
> Just a thought based on the designs I have seen.
>
> Randy Abernathy
> 4626 Old Stilesboro Road NW
> Acworth, GA 30101-4066
> Phone / Fax: 770-974-5295
> Cell: 678-772-4113
> E-mail: Cnc002@a...
>
> I furnish technical support, repair, and other related services
for your
> industrial woodworking machinery. My background as Senior Service
Engineer for
> the SCMI Group for nearly fifteen years with factory training,
combines with
> my extensive background in electronics, mechanics, pneumatics,
electrical and
> CNC machinery to offer you needed support for your machinery.
>
>
> [Non-text portions of this message have been removed]