Spindle In Position" Signal For Tool Change - Siemens SINUMERIK 828D Function Manual

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"Spindle in position" signal for tool change

The motion sequence for a tool change, especially for milling machines, mainly comprises positioning the spindle

and then the subsequent (for optimization runs, also at the same time) approach to the tool change position with

the path axes. In this case, the mandatory precondition is that the spindle is reached before approaching the tool

change position.

If the tool change cycle is interrupted by the machine operator (e.g. with an NC stop, NC stop axes plus spindles,

mode group stop etc.), then it must be completely ruled out that the spindle moves into the tool changer at an

incorrect position.

This is the reason that for spindle positioning, when the last programmed spindle position is reached with "Exact

stop fine" the following NC/PLC interface signal is output to check the position:

DB31, ... DBX85.5 (spindle in position)

The signal is only output for the "Spindle positioning" function.

This includes:

SPOS, SPOSA and M19 in the part program

SPOS and M19 in synchronized actions

Spindle positioning, using FC18

Spindle positioning via PLC interface (DB31, ... DBX30.4)

Setting the signal

Preconditions for output of signal DB31, ... DBX85.5 (spindle in position) are as follows:

The reference state of the spindle:

DB31, ... DBX60.4/5 (referenced/synchronized 1/2) = 1

When positioning the spindle, the zero mark is automatically searched for. This is the

reason that for an error-free sequence, the referenced signal is always available at the

end of positioning movement.

"Exact stop fine" must have been reached:

DB31, ... DBX60.7 (exact stop fine) = 1

Additionally, the last programmed spindle position must have been reached on the setpoint side.

Deleting the signal

When signal DB31, ... DBX60.7 is withdrawn (exact stop fine), then signal DB31, ... DBX85.5 (spindle in position)

is also always reset.

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

S1: Spindles

16.2 Operating modes

Sinumerik 840d sl