Yaskawa MP920 Motion Module - Manual (Page 339)

7.3 PO-01 Parameters
7-37
7
The following sections describe the zero point return methods.
„ 2: DEC 1 + Zero Point Signal
This method has three speed levels.
„ 4: DEC 2 + Zero Point Signal
This method searches for the zero point at creep speed after going in reverse at approach
speed.
It is used for machines that require a high level of repeatability.
Speed
reference
0
Rapid traverse
speed
Reverse direction ← → Forward direction
Zero point
Creep speed
Approach
speed
Dog
(Deceleration LS)
ZERO point signal
Time
Zero point return
position
1. 2. 3. 4.
Zero point return final
travel distance
0
1.
2.
5.
4. 3.
6.
Speed
reference
Rapid traverse
speed
Reverse direction ← → Forward direction
Zero point
Creep speed
Dog
(Deceleration LS)
ZERO point signal
Time
Zero point return
position
Zero point return final
travel distance
Approach speed