Programming technological functions (cycles)8.4 Turning - only for G code programsMillingOperating Manual, 03/2010, 6FC5398-7CP20-1BA0 369Parameters Description UnitP Thread pitch in mm/revolution Thread pitch in inch/revolution Thread turns per inch Thread pitch in MODULUSmm/revin/revturns/"MODULUSG Change in thread pitch per revolution - (only for P = mm/rev or in/rev)G = 0: The thread pitch P does not change.G > 0: The thread pitch P increases by the value G per revolution.G < 0: The thread pitch P decreases by the value G per revolution.If the start and end pitch of the thread are known, the pitch change to beprogrammed can be calculated as follows:|Pe2 - P2 |G = ----------------- [mm/rev2]2 * Z1The meanings are as follows:Pe : End pitch of thread [mm/rev]P: Start pitch of thread [mm/rev]Z 1 : Thread length [mm]A larger pitch results in a larger distance between the thread turns on theworkpiece.Machining ∇ (roughing) ∇∇∇ (finishing) ∇ + ∇∇∇ (roughing and finishing)Infeed (only for ∇ and ∇+ ∇∇∇) Linear:Infeed with constant cutting depth Degressive:Infeed with constant cutting cross-sectionThread Internal thread External threadX0 Reference point X ∅ (abs, always diameter) mmZ0 Reference point Z (abs) mmX1 End point of the thread ∅ (abs) or thread length (inc)Incremental dimensions: The sign is also evaluated.mmLWorLW2orLW2 = LRThread advance (inc)The starting point for the thread is the reference point (X0, Z0) brought forward bythe thread advance W. The thread advance can be used if you wish to begin theindividual cuts slightly earlier in order to also produce a precise start of thread.Thread run-in (inc)The thread run-in can be used if you cannot approach the thread from the side andinstead have to insert the tool into the material (e.g. lubrication groove on a shaft).Thread run-in = thread run-out (inc)mmmmmm
