Lathe G-code

1 Finished part (half profile)

Drop a DXF or DWG here or browse… Half the profile, 0,0 at the centre of the tip, drawn Y = radius. Lines, arcs, polylines and splines.

Example:

2 Blank and tool

Blank Length (mm) Diameter (mm)

Tool tip

Tool Nose radius (mm) Tool zeroed on

3 Cutting

Cut depth per pass (mm, on radius) Finishing cut depth (mm) Roughing feed (mm/min) Finishing feed (mm/min) Plunge feed (mm/min) Back-off after a cut (mm)

Spindle speed is set on the machine. Feeds can be changed for each pass in the table below.

4 Program setup

Safe position (absolute) Safe X Safe Y (radius, −)

Program name File extension Line numbers (N)

5 Preview

Import a profile to see it here.

Top: finished part. Bottom: blank and tool paths, chuck on the left, tool at the front (below the centre line). Scroll to zoom · drag to pan · double-click to fit.

6 Passes

Feed

Tick Stop to return to the safe position and pause with M0 after that pass, so the swarf can be cleared. Press cycle start to carry on.

No passes yet.

7 G-code

Controller not yet confirmed: output uses only G0/G1/G17/G21/G90/G94/M0/M30. Y is the radius (no diameter mode); nose radius is allowed for, so no G41/G42. Always dry-run clear of the work first.