Fagor VNP400, Руководство пользователя

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Chapter: 2 Section:
Page
11
MACHINE AND POWER CONNECTION
2.6 HOME SEARCH
Of all 10 possible references available in the DRO, REF 0 is the one referred to home
and the one used to perform the Machine Reference Zero (home) search.
When working in incremental, this reference is treated like the others.
When working in absolute, the part zero is the same as the Machine Reference Zero point.
When executing RESET, the DRO performs a home search and the PRESET function
cannot be executed.
The DRO uses the marker pulses (Io signal) provided by the feedback devices such as linear
transducers (scales) and rotary encoders.
Since linear transducers have several marker pulses (FAGOR scales have one every 50mm)
and encoders have one per revolution, it is necessary to always “find” the same marker pulse
at the same physical home position.
To guarantee this, it is necessary to first approach the marker pulse area and then carry out
the search.
Follow these steps to perform a home search:
* The DRO must not display any menu windows superimposed on the screen.
If this is not the case, press
.
* Also, REF 0 must be selected. If not, select it by using CHANGE REFERENCE.
* The ABS mode (absolute position values) must be selected (ABS indicator). If not,
press the softkey corresponding to function ABS/INC.
* Press the RESET softkey corresponding to the axis whose home is to be
searched.
The DRO will highlight the name of the selected axis indicating that the home search
is in progress.
If the wrong axis key is pressed by mistake, press .The DRO will main-
tain the previous home reference.
* Move the selected axis. When the DRO receives the first reference signal or marker
pulse “Io”, the axis name will no longer be highlighted, the axis count will be reset to
0 and the DRO will take this point as the new Machine Reference Zero point or Home
for that axis.
If the axis is kept on moving, the new position shown will be referred to this home
point.
To cancel the home search operation any time, press . The DRO will
maintain the previous home reference.
* Repeat this procedure for the rest of the axes.
HOME SEARCH