7
Signalling unit setting
If the set up range of signalling switches needs to be changed, you have to change the position of adjusting wheel
K3. To re-adjust wheel K3, you must partially slide the signalling unit out of the control box
(the length of wires connected
to micro switches allows it).
This can be done after removing four screws 66
(Fig. 2),
which hold the unit on the base
plate. After resetting the signalling unit to the required range the securing screw 47 of the adjusting wheel K3
(Fig. 5)
is
secured with the wire lock and the unit is mounted back to its place. Before re-tightening screws 66, the check wheels
K1 and K2
(Fig. 5)
for correct meshing.
Cams and micro switches of signalling unit are aligned as shown on Fig. 4. Cam toes 30 or 31 displace arms 34
and 35, which further operate micro switches 36, 37. When setting up signalling and position switches it is always
necessary to re-align the actuator output shaft to a position, in which the micro switches are supposed to switch.
When adjusting the signalling switches, first release the screws 32
(for SQT2)
or 33
(for SQC2)
– Fig. 4. Than the cam
30 or 31 are turned in the direction of the arrow, until the micro switch triggers. In this position, hold the cams and re-tighten
the locking screws.
At the lower end of the cam shaft 48 there is a pinion 49 which is connected to the shaft 48 via and adjustable friction
clutch.
Notice
After each handling with locking screws in the control part of the actuator, these screws must be secured from releasing
by vibrations, by dropping quick-drying varnish on them. If these screws had previously been secured using the varnish,
the old varnish layer rests must be removed while adjusting, and the surface must be duly degreased and the screws must
be painted.
c) Position unit
(Fig. 6)
This unit secures switches SQT1
(PZ)
or SQC1
(PO)
to trip when the preset output shaft speed has been achieved.
The unit’s rotary motion is derived from the output shaft motion, by means drive wheel.
This wheel turns stepwise the aligned gears, which control cam 57
(60).
Cam turning to the roller of the switch SQT1
(PZ)
or SQC1
(PO)
will cause the switches to change over.
Legenda:
38 – Driving wheel K2
47 – Locking screw of adjusting gear K3
48 – Cam shaft
49 – Pinion with friction clutch
67 – Driving wheel K1
K3 – Shifting wheel
Note
Position of adjusting gear for actuators ser. No. 52 070
for the various gears is specified on left-hand side figure
(the wheel is mounted upside down compared to other type
numbers).
Fig. 5 –
Cinematic diagram of gears
I
1 - 2,5
2 - 10
2 - 10,5
II
2,0 - 9,5
10 - 35
10 - 36
III
9 - 28
35 - 110
36 - 120
IV
28 - 95
110 -250
120 - 250
V
90 - 250
Type number
52 070
52 071
52 072
52 074
Gear
48
49
K2
PŘEVODOVÁ
SKŘÍŇKA
67
K1
38
VAČKY
II
I
I
K3
47
V
IV
III
V
IV
III
II
Transmission
box
Cams
67
K1
K2
38
48
49
47
K3
