6 POSITIONING CONTROL

(3) Operation timing and speed-switching positions

Operation timing and speed-switching points for speed-switching control are shown below.

Axis 3 positioning direction

50000

 

 

 

 

 

 

 

 

 

 

 

 

Axis 2 positioning

0

 

 

40000

70000

100000

direction

 

V

 

 

 

 

 

 

8000

 

 

 

 

 

 

 

 

 

 

 

5000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

PLC ready flag (M2000)

OFF

 

All axes servo ON command (M2042)

All axes servo ON accept flag (M2049)

Axis 2 servo ready (M2435) Axis 3 servo ready (M2455)

Start command (PX000) Servo program start

Axis 2 start accept flag (M2002)

Axis 3 start accept flag (M2003)

ON

OFF

ON

OFF

ON

OFF

(4) Servo program

Servo program No.500 for speed-switching control is shown below.

<K 500>

 

 

 

 

 

 

VSTART

 

 

 

ABS-2

 

 

 

Axis

2,

100000

Axis

3,

50000

Speed

 

 

2000

VABS

 

 

 

Axis

2,

40000

Speed

 

 

8000

VABS

 

 

70000

Axis

2,

Speed

 

 

5000

VEND

 

 

 

Start speed/position switching control

2 axes linear interpolation control (absolute data method)

Axis used . . . Axis 2, Axis 3 Axis 2 . . . 100000

End address

Axis 3 . . . . 50000

Positioning speed . . . . . . . . . . 2000

Speed-switching point, speed setting

Indicated axis No.

Axis 2

Speed-switching point

40000

70000

Speed to speed-switching point

8000

5000

 

 

 

End speed switching control

(Note): Example of the Motion SFC program for positioning control is shown next page.

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