Fagor CNC 8070, Programming Manual, Page: 119 / 556

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Programming manual
CNC 8070
T
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CH
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CAL FUNCTI
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f
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V02.0
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85
How is positioning carried out
When executing the M19 function for the first time, it homes the
spindle. The M19 functions programmed afterwards only orient the
spindle. To home the spindle again, use function G74.
When executing function M19, the positioning is carried out as follows.
1. The spindle stops (if it was turning).
2. The CNC no longer works in speed mode and it switches to
positioning mode.
3. If it is the first time the M19 is executed, the CNC homes the spindle
(home search).
4. It positions the spindle at 0º or at the angular position defined by
the "S" code (if it has been programmed). To do that, it will calculate
the module (between 0 and 360º) of the programmed value and the
spindle will reach that position.
Setting the turning direction for spindle orientation
If when executing function M19, there was an M3 or M4 active, even
if the speed is zero, this function will set the spindle orienting direction.
If no M3 or M4 is active, the turning direction is set depending on
machine parameter
SHORTESTWAY
.
• If it is a
SHORTESTWAY
spindle, it positions via the shortest way.
• If it is not a
SHORTESTWAY
type spindle; by default, it positions in
the same direction as the last spindle movement. It is also possible
to define the M19 with the positioning direction as follows.
M19.POSPositioning in the positive direction.
M19.NEGPositioning in the negative direction.
To set a particular spindle turning direction, it must be programmed
as follows.
When programming the orienting direction for a
SHORTESTWAY
type
spindle, the programmed direction will be ignored.
M19.POS S120 S1=50
(The positive direction is applied to spindle "S" and "1")
M19.NEG.S1 S1=100 S34.75
(The negative direction is applied to spindle "1")