Definitions Of Offsets; Base Offset; Zero Offset; Tool Offset - FADAL VMC 3020 Operator's Manual

Fadal
October 2000
Definition of Offsets
The most commonly used offsets are the Base Offset, Zero (Work) Offset,
and Tool Offset. These offsets are combined together to define the WCS
relative to the MCS Machine Zero (Cold Start) position.

Base Offset

The Base Offset is always active unless G153 is programmed in the
movement block (non-modal command). The Base Offset can be set to
zero. The Base Offset is used to set the "Home" position relative to the
Machine Zero. Based on the current axis position the Base Offset can be
calculated and entered into the CNC via the SET Base or Measure
Workpiece soft keys in the Manual screens (X, Y and Z only, no A or B).
The Base Offset can also be manually entered for all the axes via the Zero
Offset screen.

Zero Offset

Zero Offsets (Fixture Offset) 1-8 (ZO1,ZO2,..., ZO8) are programmed via
commands G54 - G57 and G505 - G508, the active ZO (example ZO3) is
displayed in the light blue field below the axis actual value display. Based
on the current axis position, Zero Offsets can be calculated and entered
into the CNC via the Measure Workpiece soft keys in the main Manual
screens (X, Y & Z only, no A and B). Zero Offsets can also be entered
manually for all axes via the Zero offset screen.

Tool Offset

The tool changer allows for 21 tools each with its own offset for tool
length and diameter, and tool wear settings for length and diameter. Tool
Offsets for the active Tool number (e.g. T3) are activated with the
command D1, the offset is deactivated with the command D0. The tool
offset D1 is always activated as part of a tool change. Tool offset values for
both length and diameter based on measured values can be calculated
and entered into the CNC via the measure Tool screens in the main
Manual screens. Tool offsets can also be entered manually via the Tool List
screen.
Fadal/Sinumerik 810D CNC: Definition of Offsets
SIEMENS CONTROL
Operator Manual
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