Festo Электромотор MTR-DCI - Manual (Page 36)

1. System overview
1-16 Festo P.BE-MTR-DCI-PB-EN en 1209a
Search for fixed stop With this reference travel method, at first the drive moves 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 and simultaneously 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 axis zero point
offset must be ≠ 0 (min. 0.25 mm).
+
—
REF (-)
AZ
REF (+)
1
2
AZ
1
Stop in a negative direction
2
Stop in a positive direction
Fig. 1/4: “Search for fixed stop” reference travel method