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Installation manual
CNC 8060
CNC 8065
9.
CONCEPTS.
(REF: 1402)
Home search.
The CNC will home the spindle again in the following situations.
• When programming a new home search with function G74, via program or MDI/MDA
mode.
• When the spindle exceeds the feedback pulses reading limit.
• After a failure at the Sercos ring.
• When replacing the encoder.
Peculiarities of home search for a tandem system.
In a tandem system, only the master axis is homed; the home search is transparent for the
slave that just moves along with the master.
Peculiarities of home search for analog axes homed in parallel.
When programming a home search on several analog axes in parallel; i.e. with the same
index (for example "G74 X1 Y1 Z1"), the execution sequence is the following.
1 All the axes move at the same time, each one at its feedrate REFFEED1 until each one
detects its home switch. The axes wait on the switch until all the axes involved in the home
search detect the home switch.
2 Once all the axes have reached their switches, the home search begins sequentially on
each axis at feedrate REFFEED2 starting with the last axis reaching its home switch and
following their order according to the logic number of the axes.
3 If any of the axes of the programmed group does not have a home switch, the axis waits
for the rest of the axes to reach their switches and then starts looking for its reference
mark at REFFEED2 feedrate in its corresponding order (sequence).
4 If none of the axes of the programmed group has a home switch, the home search starts
at REFFEED2 with the axis having the lowest logic number and when that axis has
finished, it goes on sequentially with the rest.
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