[GaryM]

Does anyone know where I can find the source code that would print out the g-code for an arc? The g-code would look something like this, "N30 G2 X115 Y113.3 I-43 J25.52". Maybe someone know's the math behind this. My little bitty brain just can't quit get a grasp on it. Any help would be very much appreciated.

Gary

[ger21]

If you know the start pint, endpoint, and radius of the arc, you should be able to google to find the math. You'll also need to know if it's CW or CCW.

[ger21]

Actually, if you know the startpoint, endpoint, and radius, the only math you would need is to find the center.

[GaryM]

That's what I need. The user would put in the startpoint, endpoint, and radius. Then the algorithym would find the center. Correct?

Gary

[JFettig]

do you have a drawing in say autocad? you can dimention off of the arc.


Jon

[ger21]

This should get you in the right direction. http://mathforum.org/dr.math/faq/faq...e.segment.html

[GaryM]

Jon,

The only cad program I have is Turbocad!
Gerry I will check that out, thank you.

Gary

[MetLHead]

Gary,

A while back I posted some Visual Basic source code in the Coding forum. You didn't say what programming language you were looking for, but hopefully you can decipher what you need from it. It includes a function for calculating the arc center from start, end and radius.

http://www.cnczone.com/forums/showthread.php?t=12783

Regards,
Scott

[GaryM]

MetLHead,

Thanks, that's what I have been looking for.

Gary

[widgitmaster]

http://www.datawise.net/~jorenr/cnc/circleprogram.htm

[GaryM]

widgitmaster,

Thanks for the link. I am trying to figure out how to use MetlHead's Geometry module to use in a program I am trying to write. I ain't figured it out yet but I'm trying. Must be nice not to be so darn dumb.

Gary

[widgitmaster]

The best experience is what you learn from major screw ups!

Eric

[MetLHead]

widgitmaster,

Thanks for the link. I am trying to figure out how to use MetlHead's Geometry module to use in a program I am trying to write. I ain't figured it out yet but I'm trying. Must be nice not to be so darn dumb.

Gary

I'll post some sample code later today to help get you going.

Scott

[turmite]

The best experience is what you learn from major screw ups!

Eric

If that is the case, I am the most experienced person there is!

Mike

[MetLHead]

Gary,

Here's a quick sample project in VB. On the form there are text boxes for entering a start point, end point and radius. There are also two option buttons for specifying arc direction. Just enter values and click either 'Add Line' to insert a G01 block or 'Add Arc' to insert a G02/G03 block. You might want to step through it a few times to see what's going on.

Hope this helps,
Scott

[GaryM]

MetLHead,

You are all right. That is exacly what I needed. I was getting close but I missed it a little bit. When I get the program cleaned up a little bit I will post it for people to try out. Thanks again!

Gary

[GaryM]

Boy do I need HELP! I figured out how to use MetlHead's code, but how to actually use this to draw an arc? Here is the G-code
G01 F30 X10 Y10
G01 Z-2
G02 X70 Y60 I73.3 J-26.96
I tried using this to draw an arc, e.Graphics.DrawArc(blackPen, x, y, width, height, startAngle, sweepAngle)
Still can't get it to draw an arc the way cncsimulator does. Anyone have a hint or clue?
Sorry I ask these dumb questions, I have only messed around with programming a little bit, nothing this complex.

Gary

[WayneHill]

GaryM,

I posted a G-Code to DXF program converter with open source a while back:

http://www.cnczone.com/forums/showthread.php?t=8814

Looks close to the same method that MetLHead used. Great minds think alike

[CJL5585]

GaryM,

I posted a G-Code to DXF program converter with open source a while back:

http://www.cnczone.com/forums/showthread.php?t=8814

Looks close to the same method that MetLHead used. Great minds think alike

Hey Guys:
I want to compliment Wayne on his program. I have used it and recommend it. If you need a conversion program, this is the one.

Jerry

[GaryM]

Wayne,

Thanks I'll check it out.

Gary