
■ 4. Mechanical vacuum switch
■ 5. Safety Rules for Mechanical vacuum switch & Vacuum Switch with LED display
■ 6. Adjusting Method of Blow-off Air
MODE
SW1
SW2
S1
ME
S2
Blow-off air rate adjustment needle
Air rate: Small
Air rate: Small
Air rate: Large
■
Vacuum switch of VK Series is a connector (detachable) type. Refer to the following figure for connecting
method.
■
When adjusting the pressure setting, open the cover with a flathead screwdriver. Hold the cover with
fingers to prevent the cover jumping out. Turn the adjusting nut in the clockwise direction to increase the
vacuum pressure. The adjusting nut is fixed to the locknut, thus loosen the locknut first then adjust the
pressure setting with the adjusting nut. After adjusting the pressure setting, hold the adjusting nut with
fingers to fix it and tighten the locknut.
※
In case of a breakdown, contact us for repairing.
Micro switch side
➡
Filter side
Locknut
Adjusting nut
Lead wire color
White
Common
Red
N.C.
Black
N.O.
■
When VK Series with vacuum switch is used, arrange tubes as short as possible.
■
When a piping is long, it creates large piping resistance which can cause malfunction such as the
vacuum level around the sensor remains high even in no suction state. When a piping needs to be long
unavoidably, place a sensor unit close to the vacuum end such as a vacuum pad.
■
Blow-off air (Blow-off solenoid valve / Air timer type blow-off valve)
・
Turn the blow-off air rate adjustment needle to the right (clockwise) to reduce blow-off air and to the left
(counterclockwise) to increase.
※
When finishing adjusting an air rate, make sure to tighten the locknut
in order to avoid deviation from the setting. Read closely the following
①
and
②
for the tightening
method.
①
After adjusting the air rate and turn the locknut
until it touches the needle guide, tighten the
locknut additionally at 20-30
°
with a pair of long-
nose pliers.
②
Please be aware that too much tightening may
cause damage like scraping off the knurling
surface or a deformation of needle.
⑪
Add a surge absorption circuit to relays or solenoid valves, etc. which are to be connected with output
terminal and source terminal. Avoid any use which involves over 80mA in current.
⑫
Ground the FG terminal when using a unit power source such as switching current.
⑬
Output terminals (black with a gray lead wire) and other terminals should not be short-circuited.
⑭
Avoid strong external impacts and excessive force to the sensor body.
Cover
■
Time adjustment of air timer type blow-off valve
・
Turn the blow-off timer needle to the right for a longer blow-off time and to the left for a shorter one.
Blow-off time adjustment needle
Blow-off time: Long
Blow-off time: Short
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Содержание VK Series
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