SMC Networks MHT2 User Manual page 9

Various auto switch applications are possible through different combinations of auto switch quantities and detecting positions.
2) Detection when Gripping Interior of Workpiece
1. Confirmation of fingers in reset
Detection example
position
Position of
Position to be
fingers
detected fully
closed
Switch turned ON when fingers return.
Operation of
(Light ON)
auto switch
One auto
switch
Two auto
switches
Step 1)
How to determine
Fully close the
auto switch
fingers.
installation position
Step 2) Insert the auto switch into the switch installation groove in the direction shown in the following drawing.
At no pressure or low
pressure, connect the
switch to a power
supply, and follow the
directions.
Step 3) Move the auto switch in the
direction of the arrow and fasten it at a
position 0.3 to 0.5 mm beyond the
position where the indicator light
illuminates.
Position where
light turns ON
Position to be
secured
Note 1) It is recommended that gripping of a workpiece be performed close to the center of the finger stroke.
Note 2) When holding a workpiece close at the end of open/close stroke of fingers, detecting performance of the combinations listed in the above
table may be limited, depending on the hysteresis of an auto switch, etc.
2. Confirmation of workpiece held
Position
when
gripping
Switch turned ON when gripping a
workpiece.
(Light ON)
Step 1)
Position
fingers for
gripping a
workpiece.
Step 3) Slide the auto switch in the direction of the arrow until the indicator light
illuminates.
Step 4) Slide the auto switch further in the direction of the arrow until the indicator
light goes out.
0.3 to 0.5 mm
Step 5) Move the auto switch in the opposite direction 0.3 to 0.5 mm in the
direction indicated by the arrow from its location when the indicator light comes on
again.
3. Confirmation of workpiece released
Position of
fingers fully
opened
When a workpiece is held (Normal operation):
Switch to turn OFF (Light not illuminating)
When a workpiece is not held (Abnormal operation):
Switch to turn ON (Light illuminating)
Step 1)
Fully open the
fingers.
Position where
light turns ON
0.3 to 0.5 mm
Position to be
secured
Auto Switch
MHZ
MHF
MHL
MHR
MHK
MHS
MHC
MHT
MHY
MHW
MRHQ
Misc.
D-
20-
12-12-3