SMC Networks DAS Operation Manual page 6

Design/ Selection
Caution
(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
nd
the 2 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.
2
���������������� �������� �������� [( ���� )]
× ���������������� ������������ ( ���� ) × (1 − 0.75)
[ ������������ �������� ���� ( ���� )] 2
＞
�������� ����������ℎ (����)
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
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 2
setting of this product.
If this is the case, readjust the cushion needle
incorporated in the cylinder by gradually opening
the cushion needle.
※
stroke length, insert
nd
speed
Warning
(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.
Valve Piping
2
(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.
- 6 -
Doc.no.DOC1018150
Mounting
Cylinder Piping