ZPA Pečky 52 030, Mounting Instructions

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switch lever until the micro switch switches again (micro switch button is pressed) . Now the micro switch has been
adjusted. Then slide tripping rod 58 out as described above.
d) Position transmitters
Resistance position transmitter 2 x 100
Ω
including position indicator (fig. 8)
The fundamental component of this unit is resistance transmitter 42, whose rated resistance signal value is 100
Ω
.
The transmitter has a shaft led out on two sides. On the bottom end, pinion 43 is slid on the shaft, which can slip through
on the shaft in both end positions of the transmitter, which is beneficial when adjusting this unit. Position indicator 40
is mounted on the top end of the transmitter shaft. Indicator is fixed on the transmitter shaft by means of screw 41.
This allows the position indicator to be adjusted relatively to the sight glass in the control box cover.
Resistance position transmitter setting mechanism (fig. 7)
This mechanism consists of toothed links 51 and 55, on which spring 52 is suspended. Bar with pins 53 provides
relative sliding motion of both links. This group rotates on pin 54. The entire mechanism is mounted on control base
plate 67
(fig. 2). Toothed links are in mesh with transmitter pinion 43 (fig. 8) and pinion 49 (fig. 6).
Position of pin 54 determines the gear ratio of the setting mechanism – i.e. for various values of working stroke of
actuator and thus also for positions of cam shaft in signalling unit, the transmitter turning angle and the local position
indicator turning angle is always 160°. This enables the rated transmitter signal value of 100
Ω
to be available for any
working stroke value.
Adjustment of resistance transmitter and position indicator
To adjust the position transmitter: while input shaft is in “closed” position, slide link 51 (fig. 7) towards transmitter, from
meshing with pinion 49 (fig. 6). Then turn the link clockwise up to dead stop, which is provided by pole below the
signalling unit.
Now slide the link back to meshing position with pinion 49. The transmitter’s indicator should point at 0°.
If this is not the case, move link 51 back before the dead stop position and push link 55. This will release
transmitter pinion; now set transmitter indicator close to 0° sign on the scale so that once link 55 is brought into
meshing position with transmitter pinion, their teeth clinch correctly. Cautiously turn the transmitter shaft to
make sure their clinching is correct. Subsequently, slide link 51 from meshing position again and use extra force
to push it up to dead stop
(transmitter pinion will slip through once transmitter indicator arrives at 0° sign). Again
bring link 51 into meshing position with pinion 49 (fig. 6) . In this position, oval openings in toothed links are in
Description:
40 – position indicator
41 – indicator screw
42 – resistance transmitter
43 – transmitter pinion
Fig. 8 - Resistance transmitter with position indicator
Description:
51 – toothed link
52 – spring
53 – bar and pins
54 – setting pin
55 – toothed link
64 – screw
65 – setting lever
40
41
42
43
53
55
54
52
64
65
51
Fig. 7 - Resistance position transmitter setting
mechanism