Siemens SINUMERIK 840D sl Function Manual

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TE7: Continue machining - retrace support15.2 Functional descriptionSpecial Functions618 Function Manual, 09/2011, 6FC5397-2BP40-2BA015.2.4 Maximum retraceable contour areaIn multiple machining continuation within a contour area, the reverse travel on the contour isalways possible only up to the last machining continuation point (W). In first-time reversetravel after RESU start, reverse travel up to the start of the contour range is possible.This response must be illustrated via the following graph. For the sake of simplicity, theinterruption point (U) is always the same:Figure 15-4 Maximum Retraceable contour range1st reverse travelIn first-time reverse travel, reverse travel is possible maximum up to the start of the firstcontour element (N20) after RESU start (N15) (W1 max ).If reverse travel takes place up to the machining continuation point W1, W1 defines themaximum RESU range for a possible further reverse travel after machining continuation andforward travel.2nd reverse travelA renewed reverse travel can now be undertaken maximum only up to the last machiningcontinuation point W2 max = W1.If reverse travel goes as far back as program continuation point W2, the maximum RESUrange is restricted further.:: 8 81&&B35(35( 1*;<1*;): PD[:PD[: SURJUDPFRQWLQXDWLRQSRLQW8 LQWHUUXSWLRQSRLQW5HYHUVHWUDYHO0D[5(68UDQJH5HYHUVHWUDYHO0D[5(68UDQJH*HRPHWU\D[LV*HRPHWU\D[LV