Festo Электромотор MTR-DCI - Manual (Page 42)

1. System overview
1-20
Festo P.BE-MTR-DCI-CO-EN en 1209a
Search for fixed stop With this reference travel method, the drive moves at first at
search speed in a negative or positive direction until it
reaches the fixed stop. A rise in the motor current signals that
the stop has been reached. When the maximum motor cur-
rent is reached at the same time as the motor is at a stand-
still, the MTR-DCI recognizes that the stop, and therefore the
reference position, has been reached.
As the axis must not stand still at the stop, the offset axis
zero point must ≠ 0 (min. 0.25 mm).
+
—
REF (-)
AZ
REF (+)
1
2
AZ
1
Stop in a negative direction
2
Stop in a positive direction
Fig. 1/5: Homing methods “Search for stop...”