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num parameter manual - Documentation CN

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P15 P16 P17 P18<br />

7.8 Check of Homing<br />

This test is used to check that the machine homing is repeatable.<br />

It requires the use of a dial comparator.<br />

%9990<br />

Enter the following programme (for the X axis) from the <strong>CN</strong>C<br />

keyboard (see «Operator Manual»).<br />

! CAUTION<br />

The programme below is given for guidance but must be adapted to the<br />

machine used.<br />

Axis Travels<br />

N1 G77 N5 N60<br />

N2 G9 @X500 F30 Position for the check<br />

N3 M0 $CHECK THE POSITION<br />

N4 L10 = L10+1 G79 L10=0 N40 Jump to N40 is axis modulo<br />

$LINEAR AXIS<br />

N20 G79 EL4=0 N30 Jump to N30 is the axis is not on datum switch<br />

G52 G00 L5=L5-1 @XL5 G79 N20 Move off the switch by 1 mm<br />

Sign depending on homing direction<br />

N30 EL2=0 EL1=-50000000 EL3=1 EL2=1 Measurement initialised at 50 m<br />

Sign depending on homing direction<br />

G1 G52 @X0 G10 @L0>0 N60 Move to measurement origin until the value is zero<br />

en-938818/4 7 - 17<br />

7

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