Siemens Sinumerik 840D Operating Turning page 43

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Programmable presettings

The continuous path behaviour "Exact stop" with the Codes G09 or G60

respectively does not entirely ensure dimension-wise as to how precisely a

corner point between two positioning blocks is attained.

If an exact stop has been activated in a program, the codes described be-

low can be used to specify a very precise braking behaviour at the end of

blocks. By this it is possible to determine as to how precisely the pro-

grammed corner point will be attained.

Change-over when the positioning window "fine" is reached

The tool motion changes to the next block when the tool has reached the

fine positioning window.

Sharp contour corners result at the programmed destination points.

Change-over when the positioning window "coarse" is reached

This code can be used to obtain a defined rounding of the programmed

contour corners. The block change-over occurs already at the coarse posi-

tioning window.

Block change-over

A dimensional definition of the positioning windows "coarse" and "fine" is

preset by means of machine datum.

Find out the values preset on your machine by the machine manufacturer

from his operation manual if you are going to use the described codes.

840D/828D SINUMERIK Operate

Destination point of the pro-

grammed path

Actual tool paths depending on the

positioning window

Sinumerik 828d