Re: [CAD_CAM_EDM_DRO] Re: Auto tool changers

In a message dated 2/23/2002 11:17:44 AM Mountain Standard Time,
KM6VV@... writes:

> I am doubtful that the ratchet/paw mechanism on
> the tool changer would allow reverse rotation for anything other then
> "falling back" against the paw, and thus "shortest path", while
> interesting, may not be allowed.
>

this is a correct assumption rotation is advance to position, reverst to lock
into indexed/cutting position

> From index, rotate 140 degrees,
> then fall back 20 degrees. How about videotape? Or a movie file?
>
>

With six tool positions it would be 60 degrees plus that required for the
ratcher bar to fall. Then back that amount of overtravel plus maybe one or
two degrees to insure stepper stall.

> The controller can wait for the
> M6 line "tool change" before the part program is allowed to continue.

Don't forget to move the cross slide back to a tool setting position, away
from any work in the unit incase you don't have all tools exactly set right.
EMCO used a microscope to set all the tools to the same positions aimed at
the tool points using cross hairs.
I will look up the site and send it later.

Hope all of this helps.
bill


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