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3 Directions of Movements, Dimensioning 05.91

3.6 Path calculation

The path calculation determines the distance to be travelled within a block, taking all offsets

and compensations into consideration.

The formula is generally as follows:

Path = setpoint - actual value + zero offset (ZO) + tool offset (TO).

Path calculation using absolute position data input

Reference dimension (set value) for P2

Zero offset

Machine

zero

Movement

Workpiece

zero

Path

Actual value 2

Actual value 1

TO P2

Reference

dimension

(set value)

for P1

TO P1

If incremental position data input is used, the zero offset is incorporated normally in the first

block.

Path = incremental position data + ZO + TO

If a new zero offset and a new tool offset are programmed in a new program block, the formula

is as follows:

With absolute position data input

Path = absolute position data P2 - absolute position data P1 + ZOP2 - ZOP1 +TOP2 -

TOP1

With incremental position data input

Path = incremental position data + ZOP2 - ZOP1 +TOP2 - TOP1.

3–14

SINUMERIK 880, (PG)

Siemens SINUMERIK 880 GA2 Programming Guide

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