Festo DRRD-PS1 Series User manual

DRRD-...-PS1
Festo AG & Co. KG
Postfach
73726 Esslingen
Germany
[phone]
www.festo.com
Enclosure for operating instructions 8003697
1308NH
[8028343]
Original: de
Intermediate-position module DRRD-...-PS1 English........................
Note
• Observe the warnings and notes in the operating instructions for the DRRD
semi-rotary drive.
1 Control sections and connections
1 2 4 53 67
8
9
1Shock absorbers or P-absorbers
secured with lock nut (2x)
2Supply port for semi-rotary drive
(swivel clockwise)
3Supply port for semi-rotary drive
(swivel anti-clockwise)
4Compressed air supply port for
intermediate-position module
5Intermediate-position module
DRRD-...-PS1
6Venting hole with filter
7Fastening interface at semi-rotary
drive DRRD (2x)
8Slot for cylinder switch (2x)
9Sleeve for reception of the shock
absorber (2x)
Fig. 1
2 Function and application
Note
The semi-rotary drive with intermediate-position module DRRD-...-PS1 can be
destroyed through incorrect use.
• Make sure that the intermediate-position module is throttled.
The intermediate-position module DRRD-...-PS1 is intended to permit positioning
of the flanged shaft in half of the nominal rotation angle of the semi-rotary drive
DRRD. This intermediate position can be travelled through.
3 Transport and storage
• Take into account the weight of the semi-rotary drive with intermediate-position
module.
Depending on the design, the DRRD-...-PS1 weights up to 20 kg.
• Transport the DRRD-...-PS1 by grasping the housing. Transporting it by grabbing
the dampeners 1is not recommended, since the dampeners of the intermedi-
ate position can move axially (no safe stop).
4 Installation
4.1 Installation, mechanical
• Secure the semi-rotary drive at the intended position and the effective load to
the drive flange (Operating instructions DRRD).
4.2 Installation, pneumatic
• Connect tubes to the supply ports (Fig. 2):
– intermediate position 4
– semi-rotary drive 2(swivel clockwise)
– semi-rotary drive 3(swivel anti-clockwise).
Note
Sucked-in contamination and fluids disturb the function.
– Keep venting hole 6clean and dry.
– Do not cover venting hole 6.
2
3
4
6
Fig. 2
To set the swivel speed at the semi-rotary drive:
• Use one-way flow control valves in all supply ports:
– for DRRD-16/20 as close as possible to the supply ports
– for DRRD-25 … 50 screwed directly into the supply ports.
For vertical installation and eccentric loads:
• Use the controlled throttle check valves HGL or an air reservoir VZS.
In this way you can prevent the effective load from sliding down suddenly if
there is a sudden pressure drop.
4.3 Installation, electric
• Place the cylinder switches in the slots aJ to interrogate the intermediate posi-
tion directly at the semi-rotary drive. Slot 8can be used to interrogate the
intermediate position piston.
aJ
8
Fig. 3

5 Commissioning
5.1 Adjustment of the intermediate position
Note
Without counter pressure, the connection between the sleeve and the screw-in
connector inside the intermediate-position module can loosen. This can result in
failure to function.
• Turn the lock nut or dampener only with simultaneous counter pressure on the
spanner flat of the sleeve 9.
• Check the setting dimension of the two dampeners 1:
– setting dimension X1 and X2 are the same size
(dimension Y = 0 Fig. 5, delivery status)
– setting dimension lies between X
min
and X
max
(Fig. 6).
• If necessary, adjust the intermediate position as follows:
1. Loosen the lock nuts on both dampeners 1.
2. Turn the dampener 1until the desired intermediate position is reached. When
doing this, hold the sleeve 9. The setting dimension must lie between X
min
and
X
max
(Fig. 6).
1
9
Fig. 4
3. Press the dampeners into the travelled-in end position until they meet resist-
ance. The shaft of the semi-rotary drive thereby rotates into the intermediate
position.
Through the off-set mounting of the shock absorber (dimension Y), the mid-pos-
ition (W=90°) can be adjusted by ±10°.
The following settings are possible (Fig. 5 and Fig. 6).
Fig. 5
If the setting dimension Xmax is exceeded, the shock absorber does not cushion
correctly at the intermediate position.
If the setting dimension Xmin is fallen below, the shock absorber not only cush-
ions the intermediate position, but also the end position of the semi-rotary
drive. The cushioning time of the end position might rise as a result. The cush-
ioning time of the intermediate position is not affected by this.
Size 16 20 25 32 35 40 50
Setting dimension X (P-cushioning)
Xmin [mm] 7.7 14.9 14.2 12.5 –
Xmax [mm] 10.1 17.8 20.6 23.2 –
Setting dimension X (Y9-cushioning)
Xmin [mm] 29.6 41.8 56.9 70.3 88.6 86.7 114
Xmax [mm] 32 44.5 60.4 78.5 96.2 92.7 128
Anglechangeperrevolution
at the dampener
[°] 4.3 4.5 3.3 4.1 4.1 2.7 1.9
Dimension Y for 10° swivel
angle change
[mm] 2.3 2.4 3.2 3.7 3.7 5.6 8
Lock nut
Spanner size [mm] 13 15 19 27 32 32 36
Tightening torque [Nm] 3 5 20 35 60 60 80
Fig. 6
Fig. 7 Entire setting range on the DRRD-...-PS1
4. Check the intermediate position under pressure.
5. Readjust the dampener, if required.
After the end of the settings:
Note
Without counter pressure, the connection between the sleeve and the screw-in
connector inside the intermediate-position module can loosen. This can result in
failure to function.
• Tighten the locking nuts again. Tightening torque (Fig. 6).
To lock the hex nuts, the spanner flat of the sleeve or the internal hexagon
socket of the dampener must be counter held.
1
2
Fig. 8
5.2 Setting of the swivel speed
Note
• Observe the following relationship when setting the swivel speed:
– The flow control valves at the connections for rotation of the semi-rotary
drive affect the speed with which the intermediate position is travelled to.
Both directions can be adjusted separately from each other.
– The flow control valve at the connection for the intermediate position regu-
lates the speed with which the end position (from out of the intermediate
position) is travelled to. Both directions are hereby regulated simultan-
eously.

• Select one of the activation alternatives:
Alternative 1
Circuit diagram (activation with 5/3-way valve and 3/2-way valve)
Control sequence
Fig. 9
Alternative 2
Circuit diagram (activation only with 3/2-way valves)
Control sequence
Fig. 10
The intermediate position may only be travelled to (valve V2) if the semi-rotary
drive is simultaneously exhausted. This ensures that the flow control valves fulfil
their function and no accidental change in rotation angle takes place.
Fundamentally, an overswing may occur in the intermediate position. This can be
minimised through corresponding restriction of speeds (exhaust air flow control).
Alternative 3 (shortened swivel time in 180°-operation in a swivel direction)
Circuit diagram (activation with 5/3-way valve and 3/2-way valve)
Control sequence
Fig. 11
5.3 Carrying out commissioning
Warning
Danger of injury due to uncontrolled movement of the semi-rotary drive
(e.g. through extending dampener 1).
• Consider that the pneumatic actuation of the semi-rotary drive can trigger a
movement in case of:
– eccentrically attached payload, due to the strong unbalance
– function variant Y9/Y12 due to the resetting force (back pressure) of the
shock absorber.
• When the intermediate position is exited, make sure that nobody/nothing is in
the movement area of the dampener.
• Start the test run at first with reduced operating pressure.
Note
Excessive loads can damage the DRRD-...-PS1.
• Make sure that the following values are not exceeded when swivelling into the
intermediate position:
– the maximum permissible mass moment of inertia (7 Technical data) and
the maximum permissible swivel time of the intermediate-position module
DRRD-...-PS1 (www.festo.com/catalogue).
• Make sure that the following values are not exceeded while swivelling into the
end position:
– the maximum permissible mass moment of inertia of the semi-rotary drive
DRRD.
For the swivel motion from the intermediate position into the end positions,
the respective values of the corresponding function variants of the semi-
rotary drive are permissible (Technical data in the operating instructions
for the DRRD).

1. Turn the upstream one-way flow control valve of the semi-rotary drive and inter-
mediate position completely closed and open it back up one rotation.
2. Pressurize the system and the product.
3. Start a test run with low swivel frequency.
4. Turn all one-way flow control valves open one additional rotation until the de-
sired speed of the end position and intermediate position is reached. This can
bethecaseatdifferenttimes.
6Operation
Note
The intermediate-position module can be destroyed if it runs against an unpres-
surised chamber.
• Make sure that the chamber from the previous operating status is pressurized
at the semi-rotary drive. Only when the valves are reversed simultaneously is
an air cushion present in the chamber, which makes the function of the ex-
haust air flow control valve possible.
7Technicaldata
Size 16 20 25 32 35 40 50
Mass moment of inertia (swivelling into intermediate position)
P(min.) [kgcm
2
] 0 0 0 0 –
P(max.) [kgcm
2
]150 300 400 500 –
Y9/Y12 (min.) [kgcm
2
]15 40 100 100 500 1000 2000
Y9/Y12 (max.) [kgcm
2
]500 900 1500 8000 15000 23000 40000
Max. perm. swivel time (www.festo.com/catalogue)
Pneumatic port M5 G1/8
Operating pressure range
P[bar] 4…8 –
Y9/Y12 [bar] 2…10
Swivel angle
Intermediate position [°] 90 ±10
End positions [°] 0 … 80; 100 … 180
Materials
Housing, cover Anodised aluminium
Dampener, Steel, NBR
Sleeves Stainless steel
Weight (total load)
P[kg] 1.10 1.47 2.35 5.0 –––
Y9 [kg] 1.12 1.53 2.41 5.28 8.51 10.52 19.12
Fig. 12