Givi Misure VISION 700, Инструкция по эксплуатации

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10/06/2008 M042.E GQ
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SCALE ZERO REFERENCE (rEF)
The ruler zero reference (rEF) can be considered a precision micro-contact, generally
located at the midpoint of the travel. Its position in relation to the geometrical trim of the
machine is invariable in time, and can only “move” if the scale is disassembled (for
servicing, maintenance or replacement), and re-assembled differently. In this case the
operator will have to set the references again. When using scales with reference marks at
coded distance, the research of rEF is completed after a travel of appr. 20 mm on the
travel direction. Note: for a correct rearrangement of rEF position, on scales with
reference marks at coded distance, it is important to properly set the counting way,
according to the installation instruction. The zero rEF can be searched either in
automatic mode, every time the instrument is switched on, or in manual mode:
A) Automatically
, every time there is a momentary or long-lasting interruption of
the mains power supply, either voluntary or otherwise, in order to avoid presenting
the operator with incorrect numerical values (LAST POSITION), the instrument
displays a prompt to the operator suggesting a new scale zero (rEF) search. This is
the case, for example, in the event of a sudden power failure occurring while the
Carriage is moving (since it would continue to move due to inertia), or movements
due to thermal expansion (due, perhaps, to a temperature drop at night), or
involuntary or accidental shifting (while cleaning the machine, for example). In this
way, the operator is warned that there is a probable “risk situation”. He may decide
to carry out a scale zero (rEF) search by passing the Carriages over the
corresponding points, or else to cancel the scale zero by pressing CLR (this should
be done in any case if the rulers do not have the ruler zero reference. In this case it
is advisable to check the precision of the positions reached ).
B)
Every time the operator thinks that it is necessary, he can check the positions
reached by the Carriages by setting the scale zero (rEF) search
manually
on the
Axes concerned (or on all the Axes).
For example enter:
X
and/or
Key and/or and/or
r E F
® Y
and/or
Z
The LEDs of the activated Axes flash and indicate that the instrument is ready
for the scale zero (rEF) operation.
NOTES:
Every time an Axis completes the ruler zero (rEF) search, it is automatically excluded
from this function so that it will not interfere with the other operating conditions. In any
case, the instrument will not accept any settings until all the Axes have terminated the
ruler zero (rEF) search, and will display an error message if any keys except CRL are
pressed. The operator may then decide to proceed as follows:
A) to complete the zero search for all the Axes activated;
B) to carry it out for the Axis concerned and cancel it for the remaining Axes;
C) to cancel the search right away for all the Axes because it is considered superfluous.