Hello
Cutting threads with variable gradient (G34)
With the commands "G34 X (U)... Z (W)... F... K... ; you are able to cut threads with variable gradients; the thread pitch change per spindle rotation can be entered with the address K.
Suitable for 840D sl , 840Di sl and 828D, 828Dsl
You can read more in the programming manual – Doconweb.