Ooper CNC

I have been turning in Okuma for about two years at the time of writing and I have noticed that there is a lack of good sources for basic CNC information such as descriptions of G-codes on the internet. Therfore I have decided to use this webpage to make a list with the G-codes that have been the most useful to me during my machining career. I am also working on making links to each G-code with a description that includes tips and tricks for the specific code.

I hope you will find this webpage valuable.

Topics covered on this website

G-codes for Okuma lathes

Here are some common G-codes for Okuma lathes that I have been using during my career.

Scroll down to find links to tips and tricks of the G-codes.

This page is just getting started(2024-06-16) and and is currently under development. More G-codes are under way and explaining images will be adressed.

M-codes for Okuma lathes

Here are some common M-codes for Okuma lathes.

Contours

Introduction to contours

Contours are one of the most essential parts when lathing and any part regardless of how simple it is include som sort of contour, in this section I will show some basic contours and give explanations to how they work.

A simple external contour

Let me give you an example of a very basic contour that can be the outside of a simple part that will be made by turning.

G0 X20 Z5

G1 Z0 F0.1 G42

G1 X40

G1 Z-30

G0 X45

G40

The code above make a super simple corner but the problem with writing in this way is that the corner will become sharp and this will make it easy to get cuts in your fingers when handling the part, let me give you a basic way to remedy this, G75.

If I rewrite the code above using the G75 command instead of the G1 on the appropriate spots the code becomes:

G0 X20 Z5

G1 Z0 F0.1 G42

G75 X40 L0.5

G1 Z-30

G0 X45

G40

When using the G75 I will make a chamfer with size L0.5 in this case. If you want to know more about G75 click the button below.

Also the code above use radial compensation with G40 and G42, a button is also provided.

Contours in roughing cycles

A very common application of contours is using them as a basis for roughing cycles, both internal and external. This is done with the G80, G81, G85 commands.

N - denominating lines

When writing a line in Okuma you should start the line by writing N followed by a number.

N123

Followed by the content on the line.

N123 G01 X100

There are also cases when it is more appropriate to write N followed by a word or rather a small set of letters such as

NINT