Yaskawa MP940 - Manual (Page 255)

6.3 SVA Parameter Details
6-15
6
The following sections describe the zero point return methods.
„ 0: DEC 1 + Phase-C pulse
This method has three speed levels.
„ 6: DEC 2 + Phase-C pulse
This method searches for the zero point at creep speed after going in reverse at approach
speed.
It is used for machine which requires excellent repeatability accuracy.
0
1. 2. 3. 4.
Reverse Forward ← → Zero point
Rapid traverse
speed
Approach
speed
Creep speed
Zero point
return position
Time
Zero point return final
travel distance
Zero point signal
(phase-C pulse)
Dog (Deceler-
ation LS)
Speed
reference
0
1.
2.
5.
4. 3.
6.
Reverse Forward ← →
Zero point
Speed
reference
Rapid traverse speed
Creep speed
Zero point
return position
Approach speed
Zero point return final
travel distance
Time
Zero point signal
(phase-C pulse)
Dog (Decel-
eration LS)