Maintenance Manual SP 40
Rev. 005
121
Chapter 7
Electromechanical Devices
Fig. 7.3 - Needles position (rear view)
OPERATION:
With reference to Fig 7.4a / 7.4b, when the actuator is at rest, the Clapper < 1 > is pushed against the central
Stopper < 2 > by the hinge O-Ring < 3 > Fig. 7.4a.
When a dot has to be printed, a proper current pulse is applied to the Coil < 4 > the Clapper < 1 > is attracted by the
Core < 5 > and the needles are pushed against the Media < 6 > Fig. 7.4b.
6
3
1
5
4
2
Fig. 7.4a - P.H. Operation Fig. 7.4b - P.H. Operation