This program has been written using two lines of code for each complete revolution.

Here is an example drawing of a circle to demonstrate a few G code programs Then you will have to change the Z axis value on each line… This line can then be copied and pasted as many times as you like. helical interpolation program exampleīeing able to mill a circular pocket is a very useful technique to learn and is pretty much the same as the examples already shown in this lesson but with a Z axis move thrown in. This will offset the cutter to produce a rectangle dimensionally correct to the programmed size. Using the program above you would enter the actual dia of your cutter in the offset page. Now if you wanted to apply cutter compensation to the drawing above, the program will look like this:. Trying to circular interpolate a full circle in one line of code can confuse the software into trying to go zero distance because the start and end point are at the same place. If you want to program a full circle, instead of trying to do it with one line of code, do two seperate lines of 180 degree arcs. When trying to program an arc try both methods, if you are finding errors see which one gets the results you are looking for. Sometimes if you use the radius value there may be more than one possible result, this can throw an error. Using the Radius value is easier to understand, but the I and J method provides the software with more information as to what you are trying to achieve. In example 2 the “I” always represents the X axis and “J” the Y axis.īoth of these snippets of code will produce the same result.

(end point and incremental move to arc center) I show these in my previous article, “ G code programming for dummies“. You will still need to add a header and footer if you want a complete operating program. Please note that I am only showing the few lines of code that create the arc. Both of the following examples of circular interpolation will create the arc shown above.

Mach3 g code examples