Re: [CAD_CAM_EDM_DRO] Need some help!

Ed,

I understand what you're talking about. Give me a little time to work
on the math.
Basically, the approach to take is by creating the curve in the flat,
that is, substitute X for the A axis. When machining, you can sub A for
X. I'm working out roller and tool offsets and the like. What you'll
need to do is find the angle perpendicular to the curve at some point,
measure out along that angle for the radius of the roller, that will be
the path the roller should be on. From the same point on the same
angle, move out the radius of the cutting tool, that will be that
actual cut path.

If you have the curve designed, email it to me and I'll work with it in
TurboCAD. I've been working on radius compensation using VBA in
TurboCAD, so this is along similar lines.

More later.

Regards,
JJ

On Thursday, Oct 30, 2003, at 16:54 US/Eastern, Ed Fanta 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.
>
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