[tobyaxis]

hi there,
We are trying to thread mill 1/8 - 27 NPT on a 5-axis lathe. Most of the software out there would only output code for a machining centre. Our lathe will only accept J & K. XYZ axis on a mill but on a lathe X (diam) is the tool axis. Any help would be appreciated.

Thanks in Advance

In theory you can Interpolate a Helical Thread on a 5 Axis Lathe. But you need a true Y and C Axis to do this. Also you will need to find the G-Code Designation that will Synchronize the C Axis with the Y Axis. What this will do is replace the Y Axis with the C Axis. Maybe a G100, G101, G120, G121, G200, G201, G300, or G301. You may also have to Designate a Work Plane.

This is still a 3 Axis movement but in the C, Z, and X Axies. It is the Same as an XYZ Movement but you are substituting the Y for the C and the X is now your Depth in the part.

What Machine, and Control Are you trying this on??


I have done this once before on a Nakamura-Tome. I will try to find the Program so you can see it.

G76 to my knowledge is only used for the XZ Plane, G18.

[cnc-king]

In theory you can Interpolate a Helical Thread on a 5 Axis Lathe. But you need a true Y and C Axis to do this. Also you will need to find the G-Code Designation that will Synchronize the C Axis with the Y Axis. What this will do is replace the Y Axis with the C Axis. Maybe a G100, G101, G120, G121, G200, G201, G300, or G301. You may also have to Designate a Work Plane.

This is still a 3 Axis movement but in the C, Z, and X Axies. It is the Same as an XYZ Movement but you are substituting the Y for the C and the X is now your Depth in the part.

What Machine, and Control Are you trying this on??


I have done this once before on a Nakamura-Tome. I will try to find the Program so you can see it.

G76 to my knowledge is only used for the XZ Plane, G18.

On machines equipped with FANUC controls G12.1 allows you to use the C axis as the Y where you are using polar interpolation to cut your part. the only problem with using G12.1 is you have to be in G1 mode at all times no G0 is allowed in your tool paths. all positioning have to be done in G1 mode. G18 plane should be active to use G12.1. the other problem using G12.1 is you have to cut at X0.