Maintenance and repair
INTORQ | BA 14.0214 | 10/2019
50
8.3.3
Checking the air gap
DANGER
Danger: rotating parts!
The motor must
not
run while the air gap is being checked.
1. Measure the air gap s
L
between the armature plate and the stator near the fastening screws using a
feeler gauge. (Refer to table Rated data for air gap specifications for the values.)
2. Compare the measured air gap to the value for the max. permissible air gap s
Lmax
. (Refer to table
Rated data for air gap specifications for the values.)
3. If required, replace both rotors completely (Replace rotor, Page 51).
8.3.4
Release / voltage
DANGER
Danger: rotating parts!
The running rotor must not be touched.
1. Check the brake functionality when the drive is running: The armature plate must be tightened and the
rotor must move without residual torque.
2. Measure the DC voltage at the brake.
– Compare the measured voltage to the voltage specified on the name plate. A deviation of up to
10% is permitted.
– When using bridge/half-wave rectifiers: After switching to one-way voltage, the measured DC
voltage may drop to 45% of the voltage specified on the name plate.
