Homing (G74)

G74 <spindle_name><dummy_expr> (non-modal)

G74 Homing

<spindle_name><dummy_expr> Spindle name in accordance with[1]-18 with specification of a mathematical expression.

A reference search can be conducted for closed-loop position-controlled spindles. Unlike referencing of linear axes, the values programmed with the spindle name have no significance in respect of the order of referencing but are required only for representation of complete syntax.

Programming the spindle M-functions is not allowed in the same NC-block as G74.

A distinction must be made in the following cases when referencing spindles:

Programming example

1. Referencing of the spindle starts simultaneously with Y-axis referencing:

Nxx G74 X2 Y1 S1 

2. As for 1.! The system continues with the next NC-block without waiting until the spindle has been referenced so that the X-axis is references quasi-simultaneously:

Nxx G74 S1 
Nyy G74 X1 Y2 

3. Axes X and Y are referenced first. Spindle referencing then commences:

Nxx G74 X1 Y2 
Nyy G74 S1