Re: [CAD_CAM_EDM_DRO] Cam track help!

Mark,

For this simple of a geometric shape around a perfect cylinder just use a
spreadsheet and generate the code by hand.

If your rotary table is setup vertical to the table and aligned with the
y-axis so that movements towards the edge of the wave are in the
x-direction, I like to set my x=0 point to the middle of the curve.

Go into Microsoft Excel (or any other spreadsheet that you like) and
generate a column of numbers for the rotary axis from 0 to 360 degrees,
using whatever step increment you like, I prefer 1/2 degree steps. From
these degree values calculate the X-values by using the formula for a SINE
wave specific for your amplitude (pitch?) and number of periods. The
formula is amplitude*SIN(Pi*degrees*periods/180/), and generate an X-value
for each degree value.

Add columns for the axis designators: X and A and this is your G-Code for
the movement around the cylinder. You have to specify the depth of cut with
a Z-axis move prior. For the opposite wave just make another column that is
the negative of your first wave.

Copy all of the cells and then paste into a text editor and save your G-code
file.

If you need more explicit instructions, or would like me to generate the
code for you in 5 minutes, just ask.

Daniel J. Statman, Statman Designs
www.statmandesigns.com

----- Original Message -----
From: "markpowerplus" <mabw@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, August 20, 2002 5:13 PM
Subject: [CAD_CAM_EDM_DRO] Cam track help!


> Morning all!,
> Can anyone help me ,i need to machine a double sine wave around a
> 1.630 dia tube. I am using Featurecam 5 and cncpro on my 4 axis
> mill . I just cannot seem to be able to produce the nc code to do it.
> The groove (slot?) needs to be .375 wide and .312 deep with a pitch
> of .680, who can show/tell me how to do it ?
> thanks
> Mark
>
>