Re: [CAD_CAM_EDM_DRO] "G" Im still Lost

Hi test (name?),

Check out the white paper "CNC for hobbyists" in the SherlineCNC list's
files. It discusses rounding the corners.

You really need to get studying your CAD program. You can draw the
square, or the plate, and then the toolpaths. The toolpaths are most
easily done if you use the "offset" feature. Straight lines are just
offsets, arcs are offset and have a larger radius. So if the radius of
the corner was 1/2", then the new radius needed is radius + (1/2 the
tool radius).

Lines you've figured out are G01, arcs are G02 and G03. There are
different arguments for arcs, I,J,K are offsets to the center of the
arc. These offsets can be absolute or relative. The finish position is
specified. Not all that hard! Read the white paper, and try out the
examples!

Get a demo of FlashCut, you can get a good graphic of what your code is
doing. Get your DXF files working, and it will import DXF and generate
Gcode FOR you! This worked for me!

You've already got some CAD programs, but did you know that you can get
a CAD only version of Vector CAD/CAM for low cost, which is MADE for
generating Gcode! It keeps line segments and arcs in order, and creates
the tool paths FOR you. Greatly recommended!

After you've checked out the white paper, give us the dimensions of the
2nd part (plate?) and we can quickly draw it in cad and generate a tool
path for you. What cuter size are you using?

You don't mention the controller program and mill you are using.

Alan KM6VV



testfly@... wrote:

> I am really going crazy here trying to figure out a few (what I think should be) simple things to do.
>
> Here is what I am trying to write the G code for and what the parts should look like.
> http://testfly.0catch.com/want-to-cnc/part1.jpg
> http://testfly.0catch.com/want-to-cnc/part2.jpg
>
> If I could write the G code for them I would be able to cut many parts out by cutting and pasting the G code. That is if I wrote the code in incremental and added a block to move the tool over for the next cut. right?
>
> I have the G code for part #1 But I do not have it rounding the corners of the part.
> I am now trying to figure out how to get the corners round.
>
> As for part #2 If I could figure out how to make the two curves (half circles) I could connect them with no problem.
>
> I do have some Cad programs that I downloaded demos for and I also bought Design cad 14. But, I can't make heads or tails on how to draw in them. I guess I have drawn to much in paintbrush or paint shop pro.
> I had seen where someone was talking about corel 10. I have 9, 10, and 11 but have never used them.
>
> I am sure that the best thing for me to do is to learn to draw in a cad program and draw the parts there.
> But, again I just can't figure it out.
>
> Any more help would be Great.
>
>
>
>
>
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