SMC Networks DAS User manual

Doc.no.DOC1018150
PRODUCT NAME
Deceleration Controller
MODEL/ Series/ Product Number
DAS

Doc.no.DOC1018150
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Contents
1.Saftey Instructions 3～4
2.Specific Product Precautions 5～9__
2-1.Piping Examples 10
2-2.Operation Procedures 11～14
3.Applications 15
4.Specifications 15____
5.Malfunctions and Countermeasures 15
6.Construction 16____

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Deceleration Controller
DAS Series
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards
(ISO/IEC)*1) , and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems.
ISO 4413: Hydraulic fluid power -- General rules relating to systems.
IEC 60204-1: Safety of machinery -- Electrical equipment of machines .(Part 1: General requirements)
ISO 10218: Manipulating industrial robots -Safety.
etc.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could
result in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment
or decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person
who has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when configuring
the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is
confirmed.
1.The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2.When the product is to be removed, confirm that the safety measures as mentioned above are
implemented
and the power from any appropriate source is cut, and read and understand the specific product
precautions of all relevant products carefully.
3. Before machinery/equipment is restarted, take measures to prevent unexpected operation and
malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to
be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

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Deceleration Controller
DAS Series
Safety Instructions
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange
specifications or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1.The warranty period of the product is 1 year in service or 1.5 years after the product is
delivered,whichever is first.
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our
responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
Compliance Requirements
1.The use of SMC products with production equipment for the manufacture of weapons of mass
destruction(WMD) or any other weapon is strictly prohibited.
2.The exports of SMC products or technology from one country to another are governed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules governing that export
are known and followed.
Caution
SMC products are not intended for use as instruments for legal metrology.
Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests
relevant to the metrology (measurement) laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the metrology
(measurement) laws of each country.

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2.Specific Product Precautions
Parts and Names of Products
Design/ Selection
(1)Confirm the specifications.
This product is designed to be used only in a
compressed air system (including vacuum).
Do not operate at pressures, temperatures, etc.,
beyond the range of specifications, as this can
cause damage or malfunction. (Refer to the
product specifications.)
Please contact SMC when using a fluid other
than compressed air. We do not guarantee
against any damage if the product is used
outside of the specifications range.
(2)This product is designed to perform
deceleration of the cylinder stroke and cannot
be used for a complete accurate and precise
intermediary stop of the actuator.
(3) Sonic conductance and critical pressure
ratio values for products are representative
values. The value of the deceleration controller
after deceleration is the value as of when the 2nd
speed knob is fully opened.
Design/ Selection
(1) Check the range in which the deceleration
timing can be adjusted.
Check the range in which the deceleration timing
can be adjusted by using the following formula as
a guide.
It may be difficult to control the deceleration
timing with this product depending on the cylinder
stroke and initial velocity.
* When you make adjustment for the first time,
adjust the speed by setting the number of speed
controller rotations from fully closed position to
four to five rotations. The cylinder may extend
suddenly if the cylinder is not pressurised. Make
adjustment by paying attention to the surrounding
areas.

※ 󰇛󰇜
󰇛 ｍｍ 
󰇜
*1 Switching time 0.4 (sec.)
Minimum switching time 0.3 sec. / guideline switching
stroke 75% ≈ 0.4
Example) When a cylinder whose stroke is 50 mm is
operated at 100 mm/sec, the formula is: 50 / 100 = 0.5.
As the value is greater than 0.4, deceleration control is
possible.
When a cylinder whose stroke is 50 mm is operated at
200 mm/sec, the formula is: 50 / 200 = 0.25. As the value
is smaller than 0.4, deceleration control is not possible.
Warning
Caution
For Double-end
Timing Knob
(Light Blue)
2nd Speed Knob
（Gray）
Mounting Bracket
One-touch Fitting
（Cylinder Piping）
One-touch Fitting
（Valve Piping）
For Single-end
（L Type Shown）
Adapter

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Design/ Selection
(2) Pay attention to the load weight.
Set the load weight of each cylinder by following
the procedures for selecting a product by model
selection. This product controls the cylinder
velocity by increasing the back pressure through
compression of the air in the cylinder. Therefore, if
the 2nd speed knob (gray) is excessively throttled,
the cylinder may bounce at the stroke end
depending on the load weight or initial velocity.
When an adequate deceleration is not possible
due to forces such as moment of inertia, set the
deceleration timing earlier or decrease the initial
cylinder velocity.
(3) Pay attention to the piping tube length.
The larger the piping volume between the
product (deceleration controller) and cylinder, the
lower the deceleration effect as because the back
pressure does not increase.
We recommend that you install the product as
close to the cylinder as possible. When the piping
tube is long, adjust the tube length by referring to
the formula below as a guide.
󰇟󰇛󰇜󰇠
󰇟󰇛󰇜󰇠 󰇛󰇜 󰇛  󰇜
※ 
＞ 󰇛󰇜
Example) When connecting TU0604 tube to the
cylinder (ø25, 500 mm stroke) and starting
deceleration at 75% point of the stroke length.
The formula is: (25^2 / 4^2) * 500 * (1 - 0.75) >
4,882. Therefore, the piping tube must be 4.8 m or
shorter.
*2 When starting deceleration at 75% point of the
cylinder stroke length, insert multiplication by 0.25
(= 1 - 0.75). When starting deceleration at 90%
point of the cylinder stroke length, insert
multiplication by 0.1 (= 1 - 0.9).
When the piping tube length cannot be adjusted
in the above range, set the deceleration timing
earlier or decrease the initial cylinder velocity.
(4) When using the product along with the
built-in air cushion incorporated in the
cylinder, pay attention to the adjustment
method.
If an air cushion is already incorporated in the
cylinder, the stroke movement may temporarily
stop at the original air cushion position or the stick-
slip phenomenon may occur during the 2nd speed
setting of this product.
If this is the case, readjust the cushion needle
incorporated in the cylinder by gradually opening
the cushion needle.
Mounting
(1)Keep the operation manual and check its
contents.
Install the products and operate it only after
reading the operation Manual carefully and
understanding its contents. Also, keep the
Manual where it can be referred to as
necessary.
(2)Ensure sufficient space for maintenance
activities. When installing the products, allow
access for maintenance
(3) Check the piping direction, and then mount
the product.
If this product is mounted in the opposite
direction, speed adjustment and deceleration
effect may not be observed, and the cylinder may
suddenly move at an uncontrollable speed.
(4) Mount the product by using the mounting
bracket.
When installing the product, use the mounting
holes of the bracket bottom face and secure the
product with M3 screws.
（The screws should be prepared by the user.)
Tighten the screws to the appropriate torque for
mounting the product.
Warning
Cylinder Piping
Valve Piping
Caution

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Lock
Unlock
gap
Mounting
(5) After pushing the knob down to lock,
confirm that it is locked
Confirm that the knob is locked by pushing the
knob in after adjusting the cylinder speed. When
the speed controller is unlocked, the set flow
may change. If the knob is pulled with force
while the speed controller is unlocked, it may
result in breakage. When it is unlocked, do not
pull the knob out with force.
(6) Turn the knob slowly in the open or closed
direction during operation.
(Guide for rotation speed: 1 [rev/sec] or
below)
Scale malfunction may occur if quick
adjustment is made between two graduations
(for example, 0 →1→0).
(7) Do not force the knob to turn outside the
specified range indicated to the scale.
The scale may indicate a wrong value, possibly
leading to a wrong setting.
[Example of wrong use]: While the scale
indication range is 0 to 8, turning the scale in the
open direction from graduation 8 caused the
scale to indicate 0.
size
Target Knob
Scale indication
range
DAS5
Timing Knob
0~8
2nd Speed Knob
0~8
DAS7
Timing Knob
0~8
2nd Speed Knob
0~10
(8) Timing Knob and 2nd Speed Knob have a
stopper for fully close in rotating direction.
Excess torque may break the stopper. Table
below shows the maximum allowable torque of
the knob.
Size
Target Knob
Max allowable
torque 【N・
m】
DAS5
Timing Knob
0.04
2nd Speed Knob
0.04
DAS7
Timing Knob
0.04
2nd Speed Knob
0.07
Mounting
(9) Do not use tools such as pliers to rotate the
knob.
It can cause idle rotation of the knob or damage.
(10) To adjust the 2nd speed knob, start with the
knob in the fully closed position, and then
make adjustment by turning it
counterclockwise.
Depending on the opening adjustment condition
of the knob (needle), the cylinder may suddenly
move. Adjustment of the knob (needle) in the
clockwise direction decreases the flow rate
(closes), and its adjustment in the
counterclockwise direction increases the flow rate
(opens).
The actuator speed decreases when an
adjustment in the clockwise direction is made and
increases when an adjustment in the
counterclockwise direction is made.
(11) Do not apply excessive force or shock to
the body or fittings with an impact tool.
It can cause damage or air leakage.
(1) Cylinder speed check
Large variations in actuator speed can occur as
a result of individual product differences due to
tolerance of the components, individual cylinder
differences, operating conditions, temperature,
etc. The final cylinder speed should be checked
each time the setting has been changed.
(2) Lifting force for the knob
The lifting force for the knob is specified as
shown in the table below.
Lifting the knob with a lifting force larger than
that specified in the table below will cause the
knob to come off, make the cylinder setting
speed or scale incorrect, or cause damage to
the product.
size
Target Knob
Lifting force N
DAS5
Timing Knob
1～1.5
2nd Speed Knob
1～1.5
DAS7
Timing Knob
1～1.5
2nd Speed Knob
3～4
Caution
Warning
Warning

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Mounting
(3) Do not apply excessive shocks (100 m/s2or
more) to the product by dropping it or hitting
it against another object during handling.
Even if the body appears undamaged, the internal
components may be damaged, leading to a
malfunction.
(4) For mounting the fitting to the adapter
(M5 size thread mounting)
①Tightening method
First, tighten it by hand, then give it an additional
1/6 turn to 1/4 turn with a hexagon wrench. Refer
to Table below for reference.
Connection thread
size
Proper tightening
torque 【N・m】
M5
1～1.5
Note) Excessive tightening may damage the
thread portion or deform the gasket and cause
air leakage. If the screw is not tightly screwed in
at the torque stated, it may come loose or air
may leak.
piping
(1) Refer to the Fittings & Tubing Precautions
for handing One-touch fittings.
(2) Preparation before piping
Before piping is connected, it should be
thoroughly blown out with air (flushing) or
washed to remove chips, cutting oil and other
debris from inside the pipe.
Precautions for One-Touch Tube
Fittings
Mounting/Piping
(1) Connection and disconnection of tube from
one-touch fitting
①Installation of tube
1) Cut the tube perpendicularly, being careful not
to damage the external surface. Use an SMC
tube cutter TK-series. Do not cut the tubing with
pliers, nippers, scissors, etc., otherwise the
tubing will be deformed and problems may
result.
2) The outside diameter of the polyurethane
tubing swells when internal pressure is applied
to it. Therefore, it may be impossible to re-
insert the tubing into One-touch fittings. Check
the tubing outside diameter, and when the
accuracy of the outside diameter is +0.07mm or
larger for φ2, and +0.15mm or larger for other
sizes, re-insert it into the One-touch fitting
without cutting the tube. When the tubing is re-
inserted into the One-touch fitting, confirm that
the tubing goes through the release button
smoothly.
3) Grasp the tubing, and slowly push it straight (0
to 5°) into the One-touch fitting until it comes to
a stop.
4) Pull the tubing back gently to make sure it has
a positive seal. Insufficient installation may
cause air to leak or the tubing to release.
As a guide for checking if the tubing is pulled out
or not, refer to the following table.
②Removal of the tube
1) Push the release button flange evenly and
sufficiently to release the tube. Do not push
in the tubing before pressing the release
button.
2) Pull out the tubing while keeping the release
button depressed. If the release button is not
held down sufficiently, the tubing cannot be
withdrawn.
3) To reuse the tubing, remove the previously
lodged portion of the tubing. If the lodged
portion is left on without being removed, it
may result in air leakage and make the
removal of the tubing difficult.
Caution
Caution
Caution

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Precautions for One-Touch Tube
Fittings
Mounting/Piping
(2) When mounting the tube, resin plug or
metal rod, do not press the release button.
Do not press the release button unnecessarily
before mounting tubing, resin plugs and metal
rods. This can cause the disconnection of tube.
(3) When using a tube other than that from SMC,
make sure that the tube material and the O.D.
accuracy satisfy the following specifications.
1) Nylon tube: within ±0.1 mm
2) Soft nylon tube: within ±0.1 mm
3) Polyurethane tube: within -0.2mm to
+0.15mm
Do not use a tube that does not satisfy the
specified tubing O.D. accuracy, or if a tube has a
different I.D., material, hardness, or surface
roughness from those of SMC's tube. Please
consult with SMC if there is anything unclear. It
may cause difficulty in connecting the tube,
leakage, disconnection of the tube, or fitting
damage.
Recommended Piping Conditions
(1) When connecting piping to the One-touch
fitting, use a pipe length with sufficient
margin, in accordance with the piping
conditions shown in Figure 1.
Also, when using a tying band, etc., to bind
the piping together, make sure that external
force does not come to bear on the fitting.
(see Figure 2)
Unit:mm
Nylon tube
Soft nylon
tube
Polyurethane
tube
φ4,φ5/32” 56or more 44or more 26or more 20or more
φ6 84or more 66or more 39or more 30or more
φ1/4” 89or more 70or more 57or more 32or more
φ8,φ5/16” 112or more 88or more 52or more 40or more
φ10 140or more 110or more 69or more 50or more
φ3/8” 134or more 105or more 69or more 48or more
φ12 168or more 132or more 88or more 60or more
φ1/2” 178or more 140or more 93or more 64or more
Tubing size
Mounting pitch A
Straight-
line Pipe
length
Air Supply
(1) Type of fluids
Please consult with SMC when using the
product in applications other than compressed
air.
(2) When there is a large amount of drainage
Compressed air containing a large amount of
drainage can cause the malfunction of
pneumatic equipment. An air dryer or water
separator should be installed upstream from
filters.
(3) Drain flushing
If condensation in the drain bowl is not emptied
on a regular basis, the bowl will overflow and
allow the condensation to enter the
compressed air lines. This causes the
malfunction of pneumatic equipment.
If the drain bowl is difficult to check and remove,
the installation of a drain bowl with an auto
drain option is recommended.
For compressed air quality, refer to SMC
catalog "CompressedAir Purification System".
(4) Use clean air
Do not use compressed air that contains
chemicals, synthetic oils that include organic
solvents, salt, corrosive gases, etc., as it can
cause damage or malfunction.
(1) Install an air filter.
Install an air filter at the upstream side of
valve. Select a filtration rating of 5 µm or
below, or that equivalent to or lower than ISO
8573-1:2010 [6:4:4]
* This rating is equivalent to the rating
produced when an air filter is installed for the
purity class [7:4:4] of the inlet side
compressed air.
(2) Ensure that the fluid and ambient
temperatures are within the specified range.
If the fluid temperature is 5℃or less, the
moisture in the circuit could freeze, causing
damage to the seals or leading to equipment
malfunction. Therefore, take appropriate
measures to prevent freezing.
For compressed air quality, refer to SMC
catalog "CompressedAir Purification System".
Warning
Caution
Caution

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Operating environment
(1) Do not use in an atmosphere containing
corrosive gases, chemicals, sea water,
water, water steam, or where there is direct
contact with any of these.
(2) Do not expose the product to direct
sunlight for an extended period of time.
(3) Do not mount the product in locations
where it is exposed to radiant heat.
Maintenance
(1) Do not disassemble the product or make
any modifications.
Do not disassemble the product or make any
modifications, including additional machining.
Doing so may cause human injury and/or an
accident
(2)Perform maintenance and inspection
according to the procedures indicated in the
operation manual.
If handled improperly, malfunction or damage
of machinery and equipment may occur.
(3) Maintenance work
If handled improperly, compressed air can be
dangerous.
Assembly, handling, repair and element
replacement of pneumatic systems should be
performed by a knowledgeable and
experienced person.
(4) Drain flushing
Remove drainage from air filters regularly.
(5) Removal of equipment, and supply/exhaust
of compressed air.
Before components are removed, first confirm
that measures are in place to prevent
workpieces from dropping, run-away equipment,
etc. Then, Cut the supply pressure and electric
power, and exhaust all compressed air from the
system using the residual pressure release
function. When machinery is restarted, proceed
with caution after confirming that appropriate
measures are in place to prevent sudden
movement.
Warning
Warnnig

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2-1．Piping Examples
2-2．Operation Procedure
Adjust the timing of deceleration effect (start position of second speed).
The smaller the value on the scale, the closer the start position of the 2nd
speed is to the stroke end.
Timing Knob(Light Blue)（Mark：TIMING ）
2nd Speed Knob (Gray)(Mark：SPEED )
Adjust the cylinder deceleration effect (2nd speed).
The smaller the value on the scale, the slower the 2nd speed and
greater the deceleration effect.
R end
L end
Deceleration Controller
Deceleration control on both ends
For deceleration control on R end only
For deceleration control on L end only

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*1 These procedures are for making adjustment by moving the cylinder piston on the L end at its initial
position to the R end by using the deceleration controller (double-end specifications). When adjustment
is made with the single-end specifications or by moving the cylinder piston on the R end at its initial
position to the L end, skip unnecessary steps and reverse the adjustment direction as necessary.
*2 When using a cylinder with an air cushion, we recommend that you fully open the cushion needle of the
cylinder.
Please check SMC website for further details on setting and adjustment of DAS series.
Adjustment procedure
1.Initial Settings
●Procedures
1. Initial setting
1-1. [Setting of timing knob and
2nd speed knob]
Adjust the timing knob to a position
near the fully opened position ("8"
on scale), and adjust the 2nd speed
knob to the fully closed position ("0"
on scale).
[Speed controller adjustment]
Adjust the speed controller to a
state of 4 to 5 turns in the opening
direction from the fully closed
position.
* If the cylinder bore size, stroke,
and piping tube length are within the
respective recommended
dimensions, and it is also possible
to fully check the safety surrounding
areas, adjust the speed controller to
the set speed, and then make
further adjustments.
Follow the above procedures for
each of the R end and L end in
accordance with the deceleration
controller specifications (double-end
specifications and single-end
specifications) and the piping
position.
Set the scale on the 2nd Speed
Knob(Gray) to “0”
Timing Knob Setting
(R and L end)
2nd Speed Knob
Setting
(R and L end)
Speed Controler
Adjust
(R and L end)
Valves
Switchover
(L end to R end
cylinder stroke)
* Before conducting switching, check the valve switching
directions.
When under meter-out control, the cylinder may suddenly
move at uncontrollable speed depending on the switching
direction.
Set the scale on the timing
Knob(light Blue)to “8”
※Please refer to the procedure
description for details.
L end
R end
Cylinder is temporarily stopped by deceleration
controller
Speed Controller Adjustment
L end installation in the figure : R end to L end cylinder stroke control
R end installation in the figure : L end to R end cylinder stroke control
※In case of meter-out control
R end
L end
Caution

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2. 2nd speed
adjustment
2nd Speed Knob
Adjustment
(L end)
Valve
Switchover
(L end to R end
cylinder stroke)
Speed
Controller
Readjustment
(Figure R end)
2nd Speed Knob
Adjustment
(R end)
Valve
Switchover
(R end to L end
cylinder stroke)
Cylinder stroke to stroke end
Cylinder is temporarily stopped by deceleration controller
Cylinder stroke to stroke end
Valve
Switchover
(R end to L end
cylinder stroke)
Speed
Controller
Readjustment
(Figure L end)
R end
L end
●Procedures
3.1 1st speed readjustment
[Speed controller readjustment]
Readjust the speed controller to the
set speed.
Follow the above procedures for
each of the R end and L end in
accordance with the deceleration
controller specifications (both ends
specifications and one end
specifications) and the piping
position.
* Repetitively make adjustment as
necessary.
Speed Controller Adjustment
L end installation in the figure :
R end to L end cylinder stroke
control
R end installation in the figure :
L end to R end cylinder stroke
control
※In case of meter-out control
3. 1st speed
readjustment
2nd Speed Knob (Gray) Adjustment
R end
L end
●Procedures
2. 2nd speed adjustment
[Adjustment of 2nd speed knob]
In order for the desired deceleration
speed to be achieved, adjust the 2nd
speed knob in the opening (+)
direction, so that the cylinder moves
from the temporarily stopped
position in the middle of the stroke
up to the stroke end.
* If the cylinder is not in a
temporarily stopped state in the
middle of the stroke (collision occurs
at the stroke end), setting by
deceleration controller cannot be
made. It is necessary to adjust the
speed controller knob in the closing
(−) direction.
Follow the above procedures for
each of the R end and L end in
accordance with the deceleration
controller specifications (both ends
specifications and one end
specifications) and the piping
position.
* Repetitively make adjustment as
necessary.

Doc.no.DOC1018150
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*Note: In a vertical downward deceleration control, the allowable ranges of load and piping conditions are
narrowed. Clarify the bore size, stroke, load, pressure, and piping conditions (diameter and length), and
then check products via the simulation tool (selection tool) on our website.
Contact your SMC Sales representative for any inquiries.
4. Timing Knob Adjustment
Timing Knob (Light Blue)
Adjustment
●Explanation of procedure
4. Adjustment of timing knob
【Adjustment of timing knob】
Adjust the timng knob in the closed
(-) direction to determine the starting
position of the second speed.
The standard for adjustment is to
start deceleration from about 75% of
the cylinder stroke.
The above procedure should be
performed for the R end and L end,
respectively, depending on the
specifications of the deceleration
controller and the piping location
(double-end or single-end).
Repeat the adjustment as
necessary.
Adjustment complete
5. Fine-tuning of 2 to 4 processes
●Procedures
5. Fine adjustments in processes
2 to 4
Make fine adjustments of
processes 2 to 4 to the respective
target speeds and to the
changeover position to the 2nd
speed.
Timing Knob
Adjustment
(R end)
Valve
Switchover
(L end to R end
cylinder stroke)
L end
R end
Timing Knob
Adjustment
(L end)
Valve
Switchover
(R end to L end
cylinder stroke)

Doc.no.DOC1018150
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3.Application
This product is designed to perform deceleration of pneumatic cylinders.
4.Specifications
Model
DAS5
DAS7
Fluid
Air
Proof pressure
1.05MPa
Maximum operating pressure
0.7MPa
Minimum operating pressure
0.2MPa
Ambient and fluid temperature
-5～60℃（No freezing）
Applicable tube materials(note 1)
Nylon, soft nylon, polyurethane,FEP,PFA
Note1: Pay attention to the maximum operating pressure for soft nylon and polyurethane.
5.Troubleshooting
Trouble
Possible causes
Countermeasure
Deceleration control is disabled.
The 1st speed is excessively high.
Turn the speed controller knob to
the (−) direction to decrease the
speed of the 1st speed.
The 2nd speed is excessively high.
Turn the 2nd speed knob (gray) to
the (−) direction to decrease the
speed of the 2nd speed.
The timing knob (blue) is in a fully
closed position.
Adjust the timing knob in the (+)
direction from the fully closed
position.
The piping volume is large.
Decrease the piping volume
between this product and the
cylinder.
For the piping tube length, refer to
the calculation formula in (4) of
the Design/ Selection section.
The cylinder stroke is too short.
Select the cylinder of stroke
length of 50 mm or more.
The cylinder bore size is
inappropriate.
Select the cylinder of bore size of
10 mm to 100 mm.
Dust inside
Perform air blow from the port on
the valve piping side.
If the problem is not solved even
after air blow, install an air filter to
the piping, and replace the
product with a new one.
The screw on the piping port (for
single-end) is loose, and air is
leaking.
Conduct piping with an
appropriate torque. Confirm that
air is not leaking from the piping.
Noise is heard at the stroke end.
The piping orientation is installed
in the opposite direction.
Check the direction of the fitting
on the valve piping and cylinder
piping.
Air leaks from the One-touch
fitting.
The tube is cut with cutting pliers
or a nipper, and its cutting plane
is not appropriate.
Cut the tube by using a tube
cutter to make an appropriate
cutting plane and use it.

Doc.no.DOC1018150
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6.Construction
No.
Description
Material
Note
No.
Description
Material
Note
1
Body
PBT
1
Body
PBT
2
Cover A
BRASS
Electroless
nickel
Plated
2
Cover A
BRASS
Electroless
nickel
Plated
3
Cover B
BRASS
Electroless
nickel
Plated
3
Cover B
BRASS
Electroless
nickel
Plated
4
Piston
POM
4
Piston
POM
5
Retainer
POM
5
Retainer
POM
6
Spool Ass'y
-
Electroless
nickel
Plated
6
Spool Ass'y
-
Electroless
nickel
Plated
7
Spring
SUS
7
Spring
SUS
8
Body
Ass'y(Timer)
-
8
Body
Ass'y(Timer)
-
9
Body
Ass'y(Speed)
-
9
Body
Ass'y(Speed)
-
10
Cassette
-
10
Cassette
-
11
Seal
NBR
11
Seal
NBR
12
Plug
Brass
Electroless
nickel
Plated
DAS5
DAS7
Component Parts
Component Parts

Revision history
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL https://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
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