R06.0
16/05/2019
Page 21
5.5 Setting the air gap between magnetic coil and Anchor bolt
This procedure is only necessary when:
-
The distance between the vibrating plate and the support surface has been re-
set.
-
springs or spring packages have been exchanged
-
the magnetic coil has been replaced
WARNING
Before removing the casing, unplug the power cable!
1.
remove the casing (
1
)
2.
Place a spanner (size 10 for the NVD 3 and size 15 for the NVD 4) on the hex
nuts (2) and (3) turn the hex nut in the desired direction to adjust the gap be-
tween the magnetic coil and the anchor bolt. Retighten the hex nuts (2) and (3)
3.
use a feeler gauge (4) to set the air gap between the magnetic coil (5) and the
anchor bolt (6) to between>
NVD 3: 0,5
– 1 mm
NVD 4: 0,8
– 1,5 mm
NOTE
Set the anchor bolt so that there is a parallel air gap between the
magnetic coil and the anchor bolt.
4.
mount the casing (1)
5.
measure the current consumption
for NVD 3 max. 0.2 [A]
for NVD 4 max. 0.8 [A]
If the measured value is greater, then the
air gap is too large
.
If the measured value is lower and the magnetic coil and anchor bolt clash together,
then the
air gap is too small
.
