Festo DFST-G2 Series Parts list manual

8104050
DFST-50 ... 80-G2
Stopper cylinder
8104050
2019-02
[8104052]
Instructions| Operat-
ing

Translation of the original instructions
2 Festo — DFST-50 ... 80-G2 — 2019-02

3Festo — DFST-50 ... 80-G2 — 2019-02
1 Further applicable documents..................................................................................... 4
2 Safety........................................................................................................................... 4
2.1 Safety instructions........................................................................................................ 4
2.2 Intended use................................................................................................................ 4
2.3 Foreseeable misuse...................................................................................................... 4
2.4 Training of qualified personnel..................................................................................... 4
3 Further information..................................................................................................... 5
4 Service..........................................................................................................................5
5 Product overview......................................................................................................... 5
5.1 Function....................................................................................................................... 5
5.2 Design........................................................................................................................... 6
6 Mounting..................................................................................................................... 7
6.1 Preparation................................................................................................................... 7
6.2 Mounting...................................................................................................................... 9
6.3 Mounting accessories................................................................................................... 9
7 Pneumatic installation................................................................................................ 10
8 Commissioning............................................................................................................ 11
9 Maintenance................................................................................................................ 12
9.1 Cleaning....................................................................................................................... 12
9.2 Lubrication................................................................................................................... 13
9.3 Fault clearance............................................................................................................. 13
9.4 Repair............................................................................................................................14
10 Modification................................................................................................................ 14
11 Disposal........................................................................................................................14
12 Technical data............................................................................................................. 15
Table of contents

1 Further applicable documents
All available documents for the product èwww.festo.com/pk.
2 Safety
2.1 Safety instructions
– Take into consideration the ambient conditions at the location of use.
– Only use the product in original status without unauthorised modifications.
– Observe labelling on the product.
– Store the product in a cool, dry, UV-protected and corrosion-protected environment. Ensure that
storage times are kept to a minimum.
– Prior to mounting, installation and maintenance work: Switch off compressed air supply and
secure it from being switched back on.
– Observe tightening torques. Unless otherwise specified, the tolerance is±20%.
2.2 Intended use
The stopper cylinder DFST is designed for use as a retractable fixed stop in order to reach defined
holding positions with transported material (e.g. on mounting or sorting systems). The DFST sorts the
stationary transported material in buffer zones.
Fig. 1 Stopping transported material
2.3 Foreseeable misuse
With DFST-...-L: the toggle lever must not be overrun in the stop direction by the transported material
when the lever locking mechanism is active. Otherwise the transported material will damage the lock-
ing mechanism.
2.4 Training of qualified personnel
Installation, commissioning, maintenance and disassembly should only be conducted by qualified per-
sonnel.
The skilled personnel must be familiar with the installation of pneumatic control systems.
Further applicable documents
Festo — DFST-50 ... 80-G2 — 2019-024

3 Further information
– Accessories èwww.festo.com/catalogue.
– Spare parts èwww.festo.com/spareparts.
4 Service
Contact your regional Festo contact person if you have technical questions èwww.festo.com.
5 Product overview
5.1 Function
The stopper cylinder DFST is a double-acting cylinder. The piston rod is extended with the toggle lever
mechanism by pressurising the supply port 1. The toggle lever gently stops the incoming transpor-
ted material with the integrated shock absorber. The piston rod is retracted by pressurising the supply
port 2. The stopper cylinder with spring return (not applicable for DFST-...-D/DL) can also be set to
single-acting. This is done by screwing a silencer into the supply port 1 on the bottom. This makes
sense if reduced extension velocities are sufficient.
With the stopper cylinder DFST-..-L with factory-installed lever locking mechanism, the toggle lever
locks into its end position. The attached toggle lever function kit must be converted in order to use the
function of the lever deactivating mechanism è 10 Modification.
Further information
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5.2 Design
1Supply port (extending, 2x)
2Supply port (retracting, 2x)
3Piston rod
4Drilled hole for pin for lever locking mechan-
ism/lever deactivating mechanism (2x)
5Roller toggle lever
6Stop roller (2x)
7Thread for inductive proximity sensor (2x)
8Knurled nut for setting the cushioning
9Guide rod for protection against rotation
10 Toggle lever function kit (optional)
11 Through-hole for mounting (4x)
12 Slot for proximity sensor (6x)
Fig. 2 Product design stopper cylinder DFST-...-G2
Product overview
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6 Mounting
6.1 Preparation
Fig. 3 Maintain required distances
• Leave sufficient space for the pneumatic connections and for replacing the shock absorber.
Fig. 4 Alignment of transported material
• Observe the following points:
– the transported material impacts both rollers of the toggle lever
– the direction of transport of the transported material is exactly perpendicular to the roller
toggle lever.
– with lever deactivating mechanism installed, the toggle lever can lock if the transported
material is stationary above the stopper cylinder when the piston rod is extended.
Mounting
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9Guide rod
Fig. 5 Changing stopper head
• The roller toggle lever 9can be rotated 90° to each of 4positions by the offset of the guide rod.
Lock guide rod with thread-locking compound when screwing it into the new position.
Fig. 6 Mounting distances
• Observe distances X1, X2 and X3. The distances refer to the bottom of the flange as the mounting
level of the stopper cylinder with the piston rod extended.
Size 50 63 80
X1 (maximum distance from the bottom of the
pallet)
[mm] 112.1 129.2 152
X2 (toggle lever pressed) [mm] 117.8 134 159
X3 (minimum distance from the bottom of the
pallet)
[mm] 106.8 123.5 143.8
Tab. 1 Mounting clearances
Mounting
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6.2 Mounting
Fig. 7 Direct mounting
• Fasten the stopper cylinder with 4 screws.
Size 50 63 80
Screw M8 M10 M12
Tab. 2 Screw sizes
6.3 Mounting accessories
Fig. 8 Mounting positions for accessories
• Mount accessories according to the assembly instructions:
– Use proximity sensors in the thread 8or in the slot aB
– Toggle lever function kit aJ on the stopper cylinder.
Mounting
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7 Pneumatic installation
• Select one of the two alternative connections:
AConnection on flange BConnection from below
Fig. 9 Alternative pneumatic ports
• Select one of the two actuation types (single-acting/double-acting):
2Retracting connection 1Extending connection
Fig. 10 Double-acting actuation
2Retracting connection SSilencer
Fig. 11 Single-acting actuation
1. When used as a single-acting cylinder: screw a silencer into the supply port on the bottom
(èwww.festo.com/catalogue).
2. Connect hoses to supply ports.
If necessary, convert and seal threaded pins in the alternative connections.
Pneumatic installation
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