Siemens sinumerik 840D sl Function Manual

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Detailed description2.2 Referencing and synchronization of gantry axesSpecial functions: Gantry Axes (G1)16 Function Manual, 11/2006, 6FC5397-2BP10-2BA0Synchronization processA synchronization process is always required in the following cases:• after the reference point approach of all axes included in a grouping,• if the axes become de-synchronized (s below).Operational sequence failureIf the referencing process described above is interrupted as a result of disturbances or aRESET, proceed as follows:• Abort within section 1 or 2:Restart reference point with leading axis (see section 1)• Abort in section 3:In cases where the gantry axes have not yet been referenced (IS"Referenced/Synchronized" = 1), the gantry synchronization process can be started againwith IS "Synchronize gantry grouping".Restart gantry synchronizationSynchronization of the gantry axes can be started with IS "Start gantry synchronization"under the following conditions only:• JOG/REF mode must be active. The following interface signal must be set:DB11, DBX5.2 (REF active machine function)• DB31, ... DBX 101.5 = 0 (gantry grouping is synchronized)• All grouping axes operate within the tolerance windows:DB31, ... DBX 101.4 ("Gantry synchronization ready to start")= 1• Axes are not referenced in the relevant NC channelDB21, ... DBX33.0 = 0 (referencing active)If the gantry synchronization process is not started from the referencing process by means ofIS "Start gantry synchronization", then instead of giving the following reference position:MD34100 $MA_REFP_SET_POS (reference point value/destination point for distancecodedsystem)The current actual position of the leading axis is specified as the target position andapproached in the uncoupled state.NoteAutomatic synchronization can be locked by the leading axis by means of the followinginterface signal:DB31, ... DBX29.5 (automatic synchronization locking)This always makes sense if no axis enabling signal has yet been issued for the axes. In thiscase, the synchronization process should also be started explicitly with the interface signal:DB31, ... DBX29.4 = 1 (start synchronization of gantry)