Scale Origin Signal Detection Method - Mitsubishi Electric MELSEC iQ-FX5 User Manual

Scale origin signal detection method

The following shows an operation outline of the home position return method "scale origin signal detection method".
Set "0: Need to pass servo motor Z-phase after power on" in "Function selection C-4 (PC17)". If "1: Not need
to pass servo motor Z-phase after power on" is set, the error "Z-phase passing parameter invalid" (error code:
1978H) will occur at the start of scale origin signal detection method home position return.
Operation chart
V
[Pr.44] Home position return direction
[Pr.46] Home position return speed
2.
[Pr.47] Creep speed
1. 5. 6.
4.
Proximity dog
OFF
Zero signal
1.
The machine home position return is started.
(The machine begins the acceleration designated in "[Pr.51] Home position return acceleration time selection", in the direction
designated in "[Pr.44] Home position return direction". It then moves at the "[Pr.46] Home position return speed" when the
acceleration is completed.)
2.
The machine begins decelerating when the proximity dog ON is detected.
3.
After deceleration stop, the machine moves in the opposite direction against of home position return at the "[Pr.46] Home
position return speed".
4.
During movement, the machine begins decelerating when the first zero signal is detected.
5.
After deceleration stop, the operation moves in direction of home position return at the "[Pr.47] Creep speed", and then
stops at the detected nearest zero signal.
6.
The home position return complete flag ([Md.31] Status: b4) turns from OFF to ON, and the home position return request
flag ([Md.31] Status: b3) turns from ON to OFF.
After 3., when the zero signal is in the proximity dog position, deceleration stop (4.) is started at the zero signal
without waiting for the proximity dog OFF.
3.
ON
Hardware limit switch
2 HOME POSITION RETURN CONTROL
2.2 Machine Home Position Return
2
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