Siemens SINUMERIK 840D sl Function Manual

Also see for SINUMERIK 840D sl: Manual Function manual Function manual Function manual Function manual

Synchronous Spindles (S3)14.4 Special features of synchronous modeExtended FunctionsFunction Manual, 01/2008, 6FC5397-1BP10-3BA0 895Application"Spindle stop" can halt the synchronous spindle pair without offset since the servo loopposition control remains operative.ExampleWhen the protective door is opened with an active synchronous spindle coupling, the FS andLS must be stopped without the coupling relationship being altered. This can be achieved byapplying IS "Spindle stop" to halt the FS and LS (IS "Axis/spindle stationary" (DB31, ...DBX61.4) = 1). "Servo enable" can then be canceled for both spindles.Delete S value (DB31, ... DBX16.7)The S value programmed for the LS is deleted and the LS decelerated down to zero speedvia a ramp. The FS and LS continue to operate in synchronous mode.On the other hand, IS "Delete S value" has no affect on the FS in synchronous operation.Resynchronize spindle 1/2 (DB31, ... DBX16.4 and 16.5)It is also possible to synchronize the spindle (LS) with its positioning measuring system whenit is operating in synchronous mode. It is however recommended that the leading spindleonly be re-synchronized when synchronous mode is not active.Re-synchronization (DB31, ... DBX31.4)If the following and leading spindles have fallen out of synchronism, or failed to synchronizeat all, the programmed offset can be restored using the following interface signal:IS "Re-synchronization" (DB31, ... DBX31.4).When the low-high edge of the VDI signal is detected, resynchronization is started for thefollowing spindle in question and acknowledged by the NC with the following interface signalfor the following spindle:IS "Synchronization running" (DB31, ... DBX99.4) acknowledged for the following spindle.Traverse keys for JOG (DB31, ... DBX4.6 and 4.7)The "plus and minus traversing keys" for JOG are not disabled in the control for the FS insynchronous operation, i.e. the FS executes a superimposed motion if one of these keys ispressed.NoteIf superimposed traversing movements are to be precluded, they must be locked out bymeasures in the PLC user program.NC Stop axes plus spindles (DB21, ... DBX7.4)"NC Stop axes plus spindles" in synchronous operation decelerates the coupled spindles inaccordance with the selected dynamic response. They continue to operate in synchronousmode.