Festo DGC-K-18 … -80 - Manual (Page 3)

5.3 Installation, electric
Position scanning with proximity sensors SME/SMT:
• Use grooves (S) for mounting the proximity sensors (
Fig. 12).
• Observe the minimum distances between ferritic loads and the proximity
sensors.
In this way you will avoid incorrect switching as a result of external influences.
Minimum clearances [mm]
POS 18 25 32 40 50 63 80
L1 1 0 0 0 0 0 0 0
2 1
3
DGC-K-18/-25
4 5
DGC-K-32 ... -80
2 1
2 0 0 0 0 0 0 0
3 0 0 – – – – –
4 – – 10 30 10 20 10
5 – – 10 30 10 20 10
L2 1 10 0 0 0 0 0 0
2 10 0 0 0 0 0 0
3 30 10 – – – – –
4 – – 0 0 0 0 0
5 – – 0 0 0 0 0
L3 1 30 10 10 30 10 20 10
2 0 0 0 0 0 0 0
3 10 0 – – – – –
4 – – 0 0 0 0 0
5 – – 0 0 0 0 0
L4 1 0 0 0 0 0 0 0
2 30 10 10 30 10 20 10
3 10 0 – – – – –
4 – – 0 0 0 0 0
5 – – 0 0 0 0 0
Fig. 11 (POS = position of proximity switch)
Laying the cables for the proximity switches:
• Observe that the cables for the proximity switches can be guided through the
groove.
5.4 Installation of accessories
• Use the following grooves for attachment of the accessories (
Fig. 12).
S = Slot for proximity sensor
N = Slot for mounting accessories
DGC-K-18/-25 DGC-K-32 ... -80
S/N S/N
S/N
S
S
N N
N
N
S
S
N
N
Fig. 12
• Use the slot covers ( www.festo.com/catalogue):
– to prevent contamination in the slots (S)
– for locking the cables of proximity switches.
6 Commissioning
6.1 Commissioning the complete system
• Slowly pressurise the system as a whole.
In this way you will prevent sudden uncontrolled movements.
For slow start-up pressurisation, use start-up valve type HEL.
6.2 Preparing for commissioning
Before each commissioning and in operation:
Warning
Fast moving parts can cause injury to people in the
environment of the DGC-K.
• Make sure that, in the travel range
– Nobody can reach into the path of the movable
components (e.g. by providing a protective
guard)
– There are no foreign objects in the path of the
moving components.
It should not be possible to touch the DGC-K until
the load has come to complete rest.
Fig. 13
Warning
Without external cushioning devices the DGC-K may be damaged if the maximum
values specified in the catalogue are exceeded.
• Make sure that the limit values are not exceeded even in the event of malfunc-
tions.
At medium or large useful loads or high speeds:
• Use the configuration tool “DGC-QuickCalc” for pneumatic drives in the support
portal ( www.festo.com/sp).
• Make sure that cushioning devices are of sufficient size.
Without external cushioning devices the DGC-K will withstand maximum speeds
and useful loads as per catalogue specifications or table (
Fig. 18).
6.3 Carrying out commissioning
Warning
Risk of collision!
• Note that, for the load geometries with projection,
the regulating screws 2 of the DGC-K may only be
turned when the slide is at rest.
Fig. 14
1. Close the one-way flow control valves
– for both sides at first completely
– then one rotation open again.
Fig. 15
Using the internal end position cushioning PPV:
2. Close the adjusting screws for the internal end pos-
ition cushioning PPV 2
– on both sides at first completely
– then one rotation open again.
Fig. 16
Note
To set the end position cushioning:
• Make sure that the slide reaches the end positions without striking hard
against them or bouncing back.
3. Pressurize the DGC-K slowly as follows:
– at first on both sides simultaneously. The slide will then move slightly to a
centre of equilibrium.
– Then exhaust the DGC-K on one side.
In this way you can avoid peak loadings on the DGC-K and in the compressed
air network.
4. Start a test run.
5. Check whether the speed must be modified (
5.2 Installation, pneumatic).