40496501TH Draft Version 342.2 Mechanical Operation2.2.1 Printhead mechanism and operation (See Figure 2-13)Teh printhead is a spring charged 18-pin driving head using a permanent magnet. It is attachedto the carriage, which moves in parallel with the platen. Electrically, this unit is connected to thecontrol circuits through the control board.Figure2-20 Arrangement of the head pinsView from the tip of the printhead(1) The printhead configuration:The printhead is composed of the following parts:(a) Wire guide(b) Armature assembly (Wire, Armature, Spring, Yoke, Spacer)(c) Magnet assembly (Magnet, core, coil, Yoke)(d) Printed circuit board(19/120 inches)(3/120 inches)(2/120 inches x4)(2/120 inches x4)(1/72 inches +0.005)(1/72 inches +0.005) x 8(2/120 inches) (2/120 inches)#18 #17#2 #1
