Fig. 6 End position adjustment
1. Loosen threaded sleeve
5
.
2. Position the slide in the desired end position.
3. Turn the internal cushioning component until the end position is reached.
Observe the maximum torque here
è
Following table.
NOTICE!
The exact slide position must be checked during a test run with compressed
air applied and, if necessary, corrected.
4. Retighten the threaded sleeve with the following tightening torque.
DGST-...
6
8
10
12
16
20
25
Threaded sleeve
Internal hexagon
socket
ß
3
4
5
6
8
10
10
Tightening
torque
[Nm]
0.45
0.7
0.9
1.8
2.7
4.5
7
Cushioning component
Internal hexagon
socket DYSS
ß
–
1)
2
2
2.5
3
4
5
Internal hexagon
socket DYEF
ß
1.3
1.5
2
2.5
3
4
4
Max. torque
[Nm]
0.1
0.5
0.6
1
3
5
10
1) The cushioning component has a slot instead of an internal hexagon socket.
Tab. 6 Internal hexagon socket and torque
9.2
Execution
NOTICE!
Risk of collision by payloads that protrude through the rotor/slide.
•
Only turn adjusting screws while the rotor/slide is stationary.
Fig. 7
1. First of all, close the one-way flow control valves on both sides completely,
then unscrew them one complete turn.
2. Initially exhaust drive simultaneously at both sides.
Ä
This causes the slide to move slightly to a point of balance.
3. Then exhaust the drive on just one side.
Ä
This causes the slide to move into an end position.
4. Start the test run.
5. If needed: correct speed at the one-way flow control valves. The slide should
reach the end positions without striking them harshly or recoiling.
10
Malfunctions
10.1
Fault clearance
Fault description
Cause
Remedy
Slide moves unequally.
One-way flow control valves are
not installed correctly.
Control flow of exhaust air, if
possible (not supply air).
Speed is too high.
Reduce the speed.
The slide strikes the end posi-
tion harshly.
Cushioning is insufficient.
–
Adjust shock
absorber/fixed stop again
è
Preparation for com-
missioning.
–
Reduce the speed.
–
Check and, if necessary,
replace cushioning com-
ponents.
Fault description
Cause
Remedy
Missing air cushion.
Pressurise both air supply ports
at the same time and then
exhaust at one end.
The shock absorber is faulty.
Replace the shock absorber.
The slide strikes the end posi-
tion harshly.
Payload is too great.
Reduce payload.
Slide in initial position despite
pressurisation.
Tubing incorrectly connected.
Check tubing connection.
The slide speed is too low.
Air volume is lacking.
–
Increase connection cross-
section.
–
Check the adjustment of
throttle.
–
Connect volume
upstream.
Tab. 7
10.2
Repair
Send the product to the Festo repair service for repair.
–
Use the shock absorber paying due regard to environmental protection (use
of problem substances). The shock absorber is filled with hydraulic fluid. Due
to the design, the hydraulic fluid cannot be refilled.
To replace the integrated cushioning components:
1. Observe section on "Adjusting the end positions"
è
9.1 Preparation.
2. Loosen the threaded sleeve
5
on the cushioning component.
3. Replace cushioning component
è
www.festo.com/catalogue:
–
DYEF-G8-M_-Y1 at DGST-…-P
–
DYSS-G8-…-Y1F at DGST-…-Y12.
4. Adjust the end positions.
5. Lock both cushioning components with the threaded sleeve, observe the
tightening torque
è
Tab. 6 Internal hexagon socket and torque.
11
Disposal
ENVIRONMENT!
Send the packaging and product for environmentally sound recycling in accord-
ance with the current regulations
è
www.festo.com/sp.
12
Technical data
Size
6
8
10
12
16
20
25
Design
Drive with yoke kinematics and
Guide
Recirculating ball bearing guide
Three-part
cage guide
Mode of operation
Double-acting
Pneumatic connection
M3
M5
G1/8
Cushioning
–
DGST-...-E1
Elastic cushioning, without end-position adjustment, at
both ends
–
DGST-...-P
Elastic cushioning at both ends, non-adjustable, with
end-position adjustment
–
DGST-...-Y12
Shock absorber, self-adjusting on both sides, with end-
position adjustment
Mounting position
Any
Max. speed
–
DGST-...-E1/Y12
[m/s]
0.5
–
DGST-...-P
[m/s]
0.5
0.8
Repetition accuracy
–
DGST-...-E1/P
[mm]
£
0.3
–
DGST-...-Y12
[mm]
£
0.02
Operating medium
Compressed air in accordance with ISO 8573-1:2010
[7:4:4]
Note on the operating medi-
um
Lubricated operation possible (in which case lubricated
operation will always be required)
Operating pressure
1)
[bar]
1.5 … 8
1 … 8
Ambient temperature
[°C]
–10 … +60
Theoretical force at 6 bar
(supply)
[N]
34
60
94
136
241
377
589
Theoretical force at 6 bar
(return)
[N]
25
45
79
102
207
317
495
Impact energy at the end positions
–
DGST-...-E1
[J]
0.005
0.03
0.05
0.07
0.15
0.2
0.3
–
DGST-...-P
[J]
0.018
0.05
0.08
0.12
0.25
0.35
0.45
–
DGST-...-Y12 (per
stroke)
[J]
0.09
0.18
0.28
0.48
0.85
1.9
3.6
Max. operating frequency at
DGST-...-Y12
[Cycles/-
min]
50
80
80
80
70
50
50
Product weight at 10 mm
stroke with DGST-...-E1
[g]
90
129
247
391
454
978
1463
Product weight at max.
stroke with DGST-...-E1
[g]
172
310
561
988
1402
3275
4803
