CNC Machine Operator Manuals

Here's a list of operator manuals and resources sorted by machine type.



Lathe-Specific G Code Manual 


MachMotion's Canned Cycle Playlist on YouTube


Lathe Tool Nose Radius Compensation

Tool nose radius compensation provides a way to perform precise cutting with a tool that doesn't end in a perfect point. Since no tool has a perfect point, the sharpness of the point be expressed in the radius of the tool nose (the smaller the radius, the sharper the point).

Here is an illustration of a realistic cutting tool tip. The tool nose radius is exaggerated to better illustrate the idea that the theoretical tip (commanded) position (illustrated with a red +) is not in the same place as the actual cutting edge of the tip (highlighted with purple).



Suppose you wish to cut this profile (with a tool tip of type 3):


If the cutter had a perfect point, then the commanded path would be precisely along the desired geometry path.


For a real tool, however, the nose of the cutting tool is some distance away from the point on the desired geometry. If we commanded positions along the path of the desired geometry, we would not achieve the desired geometry. The actual geometry achieved is illustrated by the blue path. Compare that with the commanded positions, illustrated with red + marks.


A real tool will not produce the desired geometry without some compensation. A compensated path (illustrated in red) would put the rounded edge of the tool nose at the correct position to produce the desired geometry (illustrated in black). 





Create Lathe Tool Table

On a lathe/turn, it's possible you have the wrong type of tool table. If you delete the existing tool table and restart Mach a couple of times, Mach will automatically create the right kind of tool table.

  1. Shut down Mach4.
  2. Navigate to the C:\Mach4\Profiles\Turn\ToolTables.
  3. Delete the "tooltable.tls" file shown below in red.
  4. Restart Mach4.
  5. Shut down Mach4. (This will create the new Lathe specific tool table.)
  6. Restart Mach4. (This will populate the tool table with your X and Z offset values.)






2000 Series Lathe Operating Manual



This manual gives the process for basic operation of a using the Lathe MachMotion control. The screen is shown below, followed by a brief summary of the different features of the screen. The number shown in the screenshot refers to a brief description below the image. 

To open the control software double-click on the profile icon on the desktop.

Control Screen Overview:

GCode Page