Reference Section > Touchcut G Code Reference > Notes on Using G-Codes:

M36 DIAdia Dd|Zz [[DIAdia] Dd|Zz ...]

Spindle ORing (Groove Milling) macro code (for spindles with chamfer or groove bits), where

dia specifies the outer groove diameter.

d specifies the depth to the center of the groove (center of bit) in relation to the surface (+ve down) (where 0 = plate thickness.

z specifies the depth to the center of the groove (center of bit) in relation to the surface (+ve up).

Multiple depths (d or z) can be specified so that multiple grooves can be cut in one operation. The first dia is required, but subsequent ones are optional.
Only all d's or all z's can be used to specify the depth of the grooves

eg:

T1(GrooveBit)
M36 DIA44 D40 D66

For the example pictured below with 44mm [38+(2 x 3)] diameter grooves and groove centers at depth 40mm and 66mm [40+26] from the surface.

The thickness of the groove is specified by the tooling as the Macro only performs one pass. Thicker grooves can be milled by programming a second groove within the thickness of the first groove. This will result in one physical groove achieved by two passes.