RE: [CAD_CAM_EDM_DRO] Cam Axial engine cam track code

Alan,

What I did was after I typed in all the coordinate data from a table
provided on plate 2 of the cam axial drawings, I inserted two columns in the
spread sheet. The first column was filled with "g1 a". The second new
column was inserted between the degrees column and the X coordinates column
and it was filled with "x". The original spread sheet looked like this:

1 0.000207119
2 0.000828223
3 0.001862556
4 0.003308857
5 0.005165364
6 0.007429816
7 0.010099453
8 0.013171023
9 0.016640784
10 0.020504509

when I was done inserting new columns and filling them with the necessary
commands it looked like this:

g20
f2.5
g1 a 1 x 0.000207119
g1 a 2 x 0.000828223
g1 a 3 x 0.001862556
g1 a 4 x 0.003308857
g1 a 5 x 0.005165364
g1 a 6 x 0.007429816
g1 a 7 x 0.010099453
g1 a 8 x 0.013171023
g1 a 9 x 0.016640784
g1 a 10 x 0.020504509

I then saved it as a text file. You could also copy and paste it into
wordpad or some other text editor to add additional commands to it if need
be. This actually allowed me to create a gcode file that worked the first
time I tried it. Of course I do not have any commands for the Z axis in
this file. I was just testing it to see how the motion looked and if the
coordinates provided in SIC made sense for trying to cut this thing.

The real test will come when I try to cut this thing. That will have to
wait for a couple of days since I have another project on the rotary table
right now and don't want to mess with the setup.

John Guenther
Sterling, Virginia

> -----Original Message-----
> From: Alan Marconett KM6VV [mailto:KM6VV@...]
> Sent: Wednesday, August 21, 2002 14:38 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Cam Axial engine cam track code
>
>
> Hi John, Dan,
>
> OK I give in. You use an Excel spread sheet to generate coordinate
> pairs (sets) for conversion to Gcode. Do you then export comma
> delimited files (CSV)? And HAND edit them into Gcode? Or do you use a
> program to do the work?
>
> About all I ever do with spread sheets is to print them out. But as of
> late, I keep seeing them more. Just this week my boss (president of the
> small company) wanted a developer schedule in Excel. I got it out
> (just typed in dates into his spread sheet). Next, I'm talking to a
> lecturer (ham buddy) at the Engineering College of UCSC. He's telling
> me that he uses a spread sheet for calculations! So I guess it's time
> to give it a try.
>
> John, I don't see any equations in your spread sheet, and I think I
> recall you saying you entered it by hand? I don't have access to the
> original article(s) in "SIC". What did you work from (raw data)?
>
> Dan, Your Celtic patterns are quite interesting, as I've observed
> before. I believe you said before that you DO use calculations in your
> spreadsheet to generate your patterns. Did you do a sheet for this
> cam? I'd be curious to see it, or a simple ring pattern as I haven't
> written a spread sheet before.
>
> I can write an equation and generate Gcode from it in a 'C' (or other
> language) program, but I was thinking a program to generate Gcode from a
> .CSV file would be just the ticket. I have already done a menu-driven
> DOS program that generates Gcode for cutting timing belt pulleys (and I
> should shortly have a new Sherline 5400 mill that is big enough to hold
> the rotary table, tilting table, etc to cut them).
>
> Or maybe a "Math Cad" type of program would be even better (never could
> afford real MathCam). As far as that goes, a "Windows" program could
> evaluate an equation entered, and generate Gcode from the equation and
> several parameters. My son needs something to do!
>
> I'd appreciate hearing more about how this process works for you guys.
>
> Alan KM6VV
>
>
> John Guenther wrote:
> >
> > I have created a folder, Cam-Axial-60 , in the files section
> and placed the
> > spread sheet and a gcode file in this folder. The gcode runs
> one iteration
> > of the track based on the coordinates provided in the
> construction article
> > in SIC. My rotary table is set up so that the y axis in the published
> > coordinates is the X axis on my setup. The code ran in TurboCNC without
> > problems although from listening to it I am not sure it will
> cut a smooth
> > track. Some refinement may be necessary to get a smooth cut. I will
> > attempt to cut it later when I get my current project off the
> rotary table.
> > I will probably cut it in wood just to save my round stock.
> >
> > John Guenther
> > Sterling, Virginia
>
>
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