Festo DGC-8 ... 63-... - Manual (Page 8)

Lubricating the guides of types G and GF:
• Lubricate the guide rail if it no longer has a layer of grease, but at the latest:
– every 3000 km or every 3 years. Grease type: LUB-KC1 (for DGC- 8-G/GF)
– every 1000 km or every 2 years. Grease type: LUB-E1 (for DGC-...-G/GF- H1)
• Note that lubrication must be undertaken more often:
– if the environment is dusty and contaminated
– with work strokes of
< 50 mm
– ambient temperatures > 40°C.
The remaining sizes of types G/GF do not require any maintenance (relubrication
however is permitted).
Lubricating the guide of type KF:
The lubrication intervals S
int
depend on
the load of the guide.
1. Calculate the load comparison factor
f
v
with the aid of the formula for
combined loads ( Technical data)
and determine the lubricating
interval S
int
from Fig. 24.
• Always lubricate the DGC at the
latest every 3 years (every 2 years
for the DGC-...-KF-...-H1).
Fig. 24
DGC
DGC-H1
• Note that lubrication must be undertaken more often:
– if the environment is dusty and contaminated
– with work strokes of
< 50 mm or > 2000 mm
– at speeds of > 2 m/s
– in ambient temperatures of > 40°C.
2. Lubricate the roller bearing through
the holes on both sides of the slide.
For this purpose use a grease gun
with a pointed nozzle or alternatively
a disposable syringe with needle.
Fig. 25
Permitted grease types:
DGC-8/12-KF:
LUB-LG0
DGC-18 … 63-KF: LUB-RN2
DGC-8 … 63-KF-H1: ELKALUB VP 874 (from Chemie-Technik)
• Push the slide backwards and forwards during lubrication.
Otherwise the grease cavities will not be filled to an equal extent.
Alternatively, Festo offers a service inspection which includes lubrication.
Otherwise the DGC does not require any maintenance.
8 Repair
• Recommendation: Return the product to our repair service for overhaul.
This ensures that special attention will be paid to the necessary fine adjust-
ments and inspections.
• Information on spare parts and aids can be found under:
www.festo.com/spareparts
Replacing cushioning elements:
• Note the section “Accurate adjustment of the stroke” in the chapter “Commis-
sioning”.
9 Accessories
Please select the appropriate accessories from our catalogue
www.festo.com/catalogue/DGC
10 Eliminating malfunctions
Malfunction Possible cause Remedy
Uneven movement
of the slide One-way flow control valve
not fitted correctly If possible reduce the exhaust
(not the supply air)
Guide rail not greased Lubricate guide rails in accordance with
chapter “Care and maintenance”
Faults in position
scanning Ferritic parts in the vicinity
of the proximity sensor Use parts made of non-magnetic materials
or observe minimum distances
(
5.3. Installing the electric components)
Heavy leakage Cylinder is distorted Fasten the cylinder to a flat base.
Seal worn Replace worn parts:
– Yourself with wearing parts kit
– By returning to Festo for repairs
Sealing band pressed in/
sucked in When the linear drive is unpressurised,
move the slide twice manually through the
entire stroke (if necessary, push fixed stops
into the end position)
Avoid vacuum in the piston chamber
(e.g. move the unpressurised slide slowly)
Cylinder does not
reach the desired
speed Air volume not sufficient – Select tubing with larger diameter
– Switch volume upstream
High friction or
counteracting force Observe maximum limits
Fig. 26
11 Technical data
DGC- 8 12 18 25 32 40 50 63
Pneumatic
connection DGC M5 G Á G ¼ G Å
DGC-N M5 suitable for
10-32 UNF Á NPT ¼ NPT Å
NPT
Mode of operation Double-acting
Mounting position Any
Operating medium Compressed air in accordance with ISO8573-1:2010 [7:-:-]
Operating pressure [bar] 2.5 … 8 2 … 8 1.5 … 8
Ambient temperature [°C] –10 … +60
+5 … +60 (DGC- 8-G)
Theoretical force
at 6 bar [N] 30 68 153 295 483 754 1178 1870
Speeds (min ... max) [m/s] 0.15
… 1
0.1
… 1.2
0.05
… 3
0.04
… 3
0.03
… 3
0.02
… 3
Cushioning length
PPV [mm] – 16.5 15.5 17.5 29.5 29.8 31.1
Cushioning P Flexible
cushioning
rings/pads
at both ends –
PPV – Pneumatic cushioning, adjustable at both
ends
YSR Shock absorber, hard characteristic curve
YSRW Shock absorber, progressive characteristic
Max. energy For diagrams, see catalogue specifications
Note on materials KF Free of copper and PTFE
Materials Scraper, band reverser,
cover: Polyacetal/polyamide
Piston seal, cushioning seal,
sealing band, cover band: Polyurethane
Stops: Steel, corrosion resistant/
coated
G End cap, cover, slide: Aluminium, coated/
polyamide
GF Slide: Aluminium, anodised
G/GF Cylinder profile, guide rail: Aluminium, anodised
KF Guide rail, slide: Steel, corrosion resistant/
coated
Fig. 27
Permitted force and torque loading
DGC- 8 12 18 25 32 40 50 63
G Fymax [N] 150 300 70 180 250 370 480 650
Fzmax 150 300 340 540 800 1100 1600 2000
Mxmax [Nm] 0.5 1.3 1.9 4 9 12 20 26
Mymax 2 5 12 20 40 60 150 150
Mzmax 2 5 4 5 12 25 37 48
GF Fymax [N] – – 440 640 900 1380 1500 2300
Fzmax 540 1300 1800 2000 2870 4460
Mxmax [Nm] – – 3.4 8.5 15 28 54 96
Mymax 20 40 70 110 270 450
Mzmax 8.5 20 33 54 103 187
KF Fymax [N] 300 650 1850 3050 3310 6890 6890 15200
Fzmax 300 650 1850 3050 3310 6890 6890 15200
Mxmax [Nm] 1.7 3.5 16 36 54 144 144 529
Mymax 4.5 10 51 97 150 380 634 1157
Mzmax 4.5 10 51 97 150 380 634 1157
f
v
=
|Mx|
Mx
max
+
|My|
My
max
+
|Mz|
Mz
max
+
|Fy|
Fy
max
+
|Fz|
Fz
max
≤ 1
Formula for combined loadings:
Fig. 28