Siemens SINUMERIK 840D sl Operating Manual

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Parameter Description UnitLR Thread run-out (inc)The thread run-out can be used if you wish to retract the tool obliquely at the end ofthe thread (e.g. lubrication groove on a shaft).mmH1 Thread depth (inc) mmDPorαPInfeed slope as flank (inc) – (alternative to infeed slope as angle)DP > 0: Infeed along the rear flankDP < 0: Infeed along the front flankInfeed slope as angle – (alternative to infeed slope as flank)α > 0: Infeed along the rear flankα < 0: Infeed along the front flankα = 0: Infeed at right angle to cutting directionIf you wish to infeed along the flanks, the maximum absolute value of this parametermay be half the flank angle of the tool.DegreesInfeed along the flankInfeed with alternating flanks (alternative)Instead of infeed along one flank, you can infeed along alternating flanks to avoidalways loading the same tool cutting edge. As a consequence you can increase thetool life.α > 0: Start at the rear flankα < 0: Start at the front flankD0 Initial plunge depth – (only for ∇ and ∇ + ∇∇∇ under "Manual Machine")If you want to rework some threads, input the initial plunge depth D0 (inc.). This isthe depth that was reached during a previous machining.By inputting the plunge depth, you avoid unnecessary idle cuts when reworking thethreads.mmD1 or ND(only for ∇ and∇ + ∇∇∇)First infeed depth or number of roughing cutsThe respective value is displayed when you switch between the number of roughingcuts and the first infeed.mmU Finishing allowance in X and Z – (only for ∇ and ∇ + ∇∇∇) mmNN Number of noncuts - (only for ∇∇∇ and ∇ + ∇∇∇)VR Return distance (inc) mmProgramming technology functions (cycles)10.2 RotateTurningOperating Manual, 05/2017, A5E40868721 373