Re: Need some help!

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ed Fanta <atex57@m...> wrote:
> Hello all, I am looking for a recommendation for CAM software for
>cams.
> This is a rather odd cam in that it is what I call a straddle
> cam. Imagine a cylinder with its axis pointing left and right,the
>cam
> action is created by a rib that goes around the
> circumference of the cylinder and "moves" left and right as the
>cylinder
> is rotated, this in turn pulls cam rollers along
> parallel to the axis of the cylinder. It would be relatively
> simple if I could use a cutter of the diameter of the cam rollers
> to eliminate sine errors but alas the machine isn't big enough. The
> machine I am using for this is 4 axis and running EMC. Any help or
> references gladly accepted. TIA. Ed.

Is this what you mean Ed?

http://homepage.ntlworld.com/stevenson.engineers/lsteve/files/rotary%
20cam1.jpg

If so this was done in Dolphin. Although small this was done in three
passes as the cam track was 7.2mm wide. One track central at 6mm and
two side passes offset to 0.6 mm to clean up.
Dolphin will automatically do the tool offset allowance so all you
draw is the one central path.
We regulary do these for racing motorcycle gearboxes with no problems
or scrappers.

John S.