30iE - v1111 - Installation/Operation - (10/48)
2.3 Machine Reference selection and search
Although it is not ab solutely necessary, it is recommended to use the refere nce
marks (Io) of the feedback system in order to set a machine zero point.
This allows the user to reference the machine axes and restore the work coordinates
after having turned the dro off, moved the machine while the dro was off, for safety or
for any other reason.
Fagor linear encoders have reference marks every 50 mm all along its length.
In order to use these marks properly, choose an area on the axis, for example in the
middle of the measuring length or at one end. Approach this area and carry out the
home search. Once the reference mark has been found, mark this area with a marker
or sticker in order to carry out the home sea rch in the same area in later occasions
and make sure that you are using the same machine zero point (home).
Fagor also offers encoders with distance-coded reference marks every 20, 40 or 100
mm. When using these distance-coded reference marks, there is no need to move to
the 0 p osition to find the refe rences, simply move a distance equ al to th e gap
between marks (20, 40 or 100 mm depending on the linear encoder)
When using an absolute encoder, there is no need to search for the reference marks
(home).
The dro stores in its in ternal memory work coordinates such as machine zero,
absolute and incremental.
2.3.1 Home search sequence:
For encoders with regular reference marks, move the axis to the home area.
Access or exit the home search mode.
The axis displays blink showing
" r "
if the axis has not been homed or
" r on"
if it has found the references (home).
Select the axis to be referenced (homed)
The selected axis blin ks until a refere nce mark is detected. The reference signal
presets the axis display automatically with the value of PAR10, 0.000 mm by default.
If the encoder does not have a reference mark, move the axis to the desired position
and press this key.
