3．Application; 4．Specifications; 5．Malfunctions And Countermeasures; 6．Adjusting The Speed - SMC Networks ASD F-A Series Operation Manual

3. Application
This product is designed to control the speed of a pneumatic actuator.
4. Specifications
Fluid
Proof pressure
Maximum operating pressure
Minimum operating pressure
Ambient and fluid temperature
Applicable tube materials
Note1:Pay attention to the maximum operating pressure for soft nylon and polyurethane.
5. Malfunctions and Countermeasures
Trouble
Speed(flow) cannot
be adjusted.
Air leaks from the
One-touch fitting.
Or the tubing
disconnects.
6. Adjusting the speed
The following procedures are recommended for adjusting the speed controller.
1.For prevention of sudden cylinder extension
①Fully close the needle by rotating the knob in the clockwise direction (-) on the meter-in side and
fully open the needle by rotating the knob in the anti-clockwise direction (+) on meter-out side.
②Gradually rotate the knob in the anti-clockwise direction (+) to open the needle on the meter-in
side to extend the cylinder initially at a low speed.
③Adjust the retraction speed by rotating the knob in the clockwise direction (-) to close the needle
on the meter-out side.
④Rotate the knob in the anti-clockwise direction (+) to open the needle on the meter-in side to set
the desired target speed at which the cylinder extends during normal operation.
2.For bi-directional control (e.g. control of single acting cylinders)
①Fully close the needle by rotating the knob in the clockwise direction (-) on the meter-in side and
on the meter-out side.
②Gradually rotate the knob in the anti-clockwise direction (+) to open both meter-in and meter-out
side to adjust the extension and retraction speed of the cylinder.
(note 1)
Possible causes
Dust inside.
Tubing has been cut
using pliers or nipper.
The tolerance of
outside diameter of the
tubing is outside of the
specification.
Air
1.5MPa
1.0MPa
0.1MPa
-5～60℃（No freezing）
Nylon,soft nylon,polyurethane,FEP,PFA
Fully open the needle(or knob) and apply air
blow from the free flow 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.
Use tube cutters.
the If tubings made by manufacturers other than
SMC are used, check the accuracy of the
tubing's outside diameter.
Nylon tube: Within +/-0.1 mm
Soft nylon
Polyurethane tube: Within -0.2 to +0.15 mm
10
Countermeasure
tube: Within +/-0.1 mm