Fagor CNC 8070 - Home Search; Definition of Home Search

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 Programming manual
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CNC 8070
2.
MACHINE OVERVIEW
Home search
(SOFT V02.0X)
26
2.4 Home search
2.4.1 Definition of "Home search"
It is the operation used to synchronize the system. This operation must
be carried out when the CNC loses the position of the origin point (e.g.
by turning the machine off).
In order to perform the "Home search", the machine manufacturer has
set particular points of the machine; the machine zero and the
machine reference point.
• Machine zero (home).
It is the origin point of the machine reference system.
• Machine reference point.
It is the physical point where the system is synchronized (except
when the machine uses I
0
distance-coded reference marks or
absolute feedback). It may be located anywhere on the machine.
When "searching home", the axes move to the machine reference
point and the CNC assumes the coordinate values assigned to that
point by the machine manufacturer, referred to machine zero. When
using I
0
distance-coded reference marks or absolute feedback, the
axes will only move the distance necessary to verify their position.
O
M
O
W
H
X
MH
Y
MH
X
WH
Y
WH
Machine zero (home).
Part zero.
Machine reference point.
Coordinates referred to machine reference system.
Coordinates referred to the part reference system.
When programming a "Home search", neither the fixture offsets nor
the zero offsets are canceled; therefore, the coordinates are displayed
in the active reference system.
On the other hand, if "Home search" is carried out one axis at a time
in JOG mode (not in MDI), the active offsets are canceled and the
coordinates being displayed are referred to machine zero.
i