Homing in DIN syntax( G74)

Syntax:

G74 <spindle_name>.

non-modal

G74

Homing

<spindle_name>..

Spindle name according to P-CHAN-00053 with specification of a value.

Homing can be conducted for closed-loop position-controlled spindles. As opposed to referencing linear axes, the values programmed with the spindle name have no significance relating the referencing sequence and are only required to represent a complete syntax.

It is not permitted to program spindle M functions in the same NC block as G74.

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

Programing Example

prg_example

Homing (G74)

Case 1:
Spindle referencing starts simultaneously with
Y axis referencing:

  Nxx G74 X2 Y1 S1

Case 2:
Same as 1.! The system continues to the next NC block without waiting until the spindle is referenced so that the X axis is referenced quasi simultaneously:

  Nxx G74 S1

  Nyy G74 X1 Y2

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

  Nxx G74 X1 Y2

  Nyy G74 S1