Multiple tools per pocket?

Alloy wrote:

What is the proper way to use multiple tools per pocket on a fixed location tool changer?.

This is somewhat harder than it should be, unfortunately.
You would expect the pocket number to correspond to the turret position and the tool number to define the offsets, but LinuxCNC doesn't work like that because of a bad decision made quite a long time ago.

Have a look at the "lathe-fanucy" simulator config for an example of how you can encode extra data in the tool number to achieve what you want. (as mentioned in the other reply)

One other thing you can consider is making your tool-changer use modulo arithmetic or ignore the first digit, so that (for example 5 and 1 both result in pocket 1 of a 4-tool post being selected, or 11 and 1 if you prefer)

G43 lets you load whatever tool offset you want. So if you have a spot drill and a regular drill on turret position 4, you could use entry 4 in your tool table for the spot drill and entry 14 (or any other unused number) in your tool table for the regular drill.

T4 M6 G43 (turn the turret to 4 and load T4's spot drill offset)
G0 Z0.1
X0
G81 R0.1 Z-.050 F6 (spot drill)

G43 H14 (now load the big drill's offset)
G0 Z0.1
X0
G81 R0.1 Z-1 (drill)

5axisormore wrote:

I hadn't thought of the G43 on a lathe.

LinuxCNC requires G43 in lathe mode too. (unless you remap M6 to do it automatically)