Festo DGC-HD Series User manual

(en) Operating
instructions
8074748
2017-10a
[8074750]
Linear drive
DGC-HD

DGC-HD
2Festo – DGC-HD – 2017-10a
Original instructions
Symbols: Installation and commissioning may only be per
formed in accordance with these instructions by
technicians with appropriate qualifications.
Warning
Caution
Note
Environment
Accessories
English – Linear drive DGC-HD 3.......................................................

DGC-HD
Festo – DGC-HD – 2017-10a English 3
English – Linear drive DGC-HD
Table of contents
1 Control sections and connections 4............................................
2 Function and application 5...................................................
3 Transport and storage 5.....................................................
4 Requirements for product use 6...............................................
5 Installation 7..............................................................
5.1 Mechanical installation 7.....................................................
5.1.1 Carrying out the product installation 7..................................
5.1.2 Installation of the effective load 9.....................................
5.1.3 Installation of accessories 10..........................................
5.2 Pneumatic installation 11.....................................................
6 Commissioning 12...........................................................
7 Service and maintenance 14...................................................
8 Repair 15..................................................................
9 Accessories 15..............................................................
10 Troubleshooting 16..........................................................
11 Technical data 17............................................................
12 Characteristic curves 18......................................................

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Documentation on the product
For all available product documentation èwww.festo.com/pk
1 Control sections and connections
13 4256
7
89aJaA
1Shock absorbers (2x)
2Guide rail (2x)
3Lubrication hole for bearing guide (4x)
4Thread and centring hole for mounting the
effective load (12x)
5Slide
6Thread for optional switch lug (on both
sides, 2x)
7Supply ports
8Surface for profile mounting
9Slot for slot nut mounting and accessories
(on both sides)
aJ Groove for proximity switch (on both sides)
aA Supply ports with plug screws
Fig. 1

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2 Function and application
When the compressed air ports are pressurised alternately, the internal slide moves backwards and
forwards in the cylinder barrel. By means of a rigid connection, the slide 5also moves. The slot in the
cylinder barrel required for this is covered by a band system. The slide is bearing mounted. The refer
ence position of the slide can be detected using proximity sensors in the slots aJ.
The linear drive DGC-...-HD is intended for positioning effective
loads with large loads. It is approved for the slide and yoke
operating modes (èobserve load limits).
Pressureless movement of the slide is permitted only for fault cor
rection and at low speed. If excessive speed is used, the resulting
low pressure can pull the sealing band into the piston chamber.
This leads to:
– high leakage and
– impermissible acceleration (e.g. with vertical mounting posi
tion).
Fig. 2 Slide operation
Fig. 3 Yoke operation
3 Transport and storage
Note
 Avoid touching the guide rail with your hands during transport und storage. Other
wise the layer of grease will be damaged.
 Take the product's weight into account. Depending on the version, the DGC-HD can weigh up to
100 kg.
For transport, the conveyors must be positioned at the permissible support spacing
(support spacing è12 characteristic curves).
 Make sure storage conditions are as follows:
– short storage times
– cool, dry, well-shaded, corrosion-resistant locations.

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4 Requirements for product use
Note
Malfunctions will occur if the device is not used correctly.
 Make sure that the specifications contained in this chapter are adhered to at all
times.
 Take into consideration the legal regulations applicable for the destination, as well as:
– regulations and standards
– regulations of testing organisations and insurers
– national specifications.
 Note the warnings and instructions on the product and in the relevant operating instructions.
 Remove all transport packaging, such as foils, caps and cardboard.
The packaging is intended for recycling
(exception: oil paper = residual waste).
 Observe the local regulations for environmentally friendly waste management of electronic compon
ents.
 Take into account the material specifications (èTechnical data chapter).
 Use the product in its original status, without any unauthorised product modifications.
 Take into consideration the ambient conditions at the location of use.
Corrosive environments (e.g. ozone) reduce the service life of the product.
 Compare the limit values in these operating instructions with those of your application (e.g. forces,
torques, temperatures, loads, speeds).
Operation of the product in compliance with the relevant safety regulations is contingent on adher
ence to the load limits.
 Take the tolerance of the tightening torques into account. Unless otherwise specified,
the tolerance is ±20 %.
 Make sure there is a supply of correctly prepared compressed air (èTechnical data chapter).

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5 Installation
5.1 Mechanical installation
 Avoid the sealing band being pressed and/or sucked in.
Damage to the sealing band reduces its reliability in operation. Jerky movement of the unpressur
ised slide can cause a partial vacuum that sucks the sealing band into the piston chamber.
 Leave all screws and threaded bolts in their original states, unless you are requested to modify
them in these instructions.
 Prevent the band system from becoming damaged or excessively dirty.
Damage to the DGC-HD will reduce its reliability and service life.
5.1.1 Carrying out the product installation
Note
Heavy tensile loads may cause the screws in the cover to be pulled out.
 Fasten the DGC-HD with profile mountings or slot nuts (èTab. 1). Mounting on the
connector/end cap is not possible.
 When installing, ensure that there is no tension or deflections
present (evenness of mounting surface ≤0.05 % of the stroke
length; max. 0.5 mm). For gantry applications, parallel align
ment of the axes is additionally required. For additional informa
tion, please contact your local Festo Service. Fig. 4
 Place the DGC-HD so that all the control sections are accessible.
 Observe the required support spacings. The diagrams (è12 Characteristic curves) show the sup
port spacing, which is dependent on the mounting position and effective load. If the specified min
imum distances are exceeded, it is imperative to carry out an individual functional test.
Note
Unsuitable mounting techniques can damage the DGC-HD.
 Make sure that the mounting components are outside the positioning range of the
slide.

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 Fasten the DGC-HD.
 Please select the corresponding accessories from our catalogue (èwww.festo.com/catalogue).
Profile mounting Slot nut mounting
MUE NST
aA
Profile mounting in the slot aA of the mounting
surface 8
Slot nut mounting in slot aA.
When tilted, the slot nuts slide into the slot at
each position of the profile
Tab. 1
 Tighten the mounting screws uniformly with the following tightening torque.
Size 18 25 40
Screw MUE M5 M5 M8
NST (lateral) M5 M5 M6
NST (underneath) M5 M6 M6
Tightening torque MUE [Nm] 5 5 20
NST (lateral) [Nm] 5.9 5.9 9.9
NST (underneath) [Nm] 5.9 9.9 9.9
Tab. 2

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5.1.2 Installation of the effective load
Hard and rigid effective loads (e.g. steel):
Note
If the aluminium slide is bent against a curved effect
ive load, the service life of the guide will be reduced.
 Make sure that the mounting surface of the effect
ive loads is even to within t ≤ 0.01 mm.
If additional slides are used, possible differences in
height must be compensated for.
Fig. 5
t
 Place the effective load in such a way that the break-down
torque resulting from force F (parallel to the axis of motion) and
lever arm “a” remains small.
Fig. 6
aF
 Fasten the effective load to the slide with the screws and cent
ring sleeves.
 Make sure that the tightening torques and maximum screw-in
depth D is adhered to.
Fig. 7
Size 18 25 40
Screw (lateral/top) M5 M6 M6
Max. screw-in depth D [mm] 8.4 9.5 10
Centring (H7) [mm] 9 9 9
Tightening torque [Nm] 5.9 9.9 9.9
Tab. 3
Effective loads with own guide:
 Adjust the guides of the effective load and of the DGC-HD so that they are exactly parallel.
This avoids overloading of the guide and increased wear.

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5.1.3 Installation of accessories
If proximity sensors are used:
 Use:
– inductive proximity sensors with switch lug aB (èAssembly instructions of the accessory used)
in the slot aJ or with mounting bracket aC
– magnetic proximity sensors in the slot aJ.
Mounting
in the grooves aJ (èFig. 1) with mounting bracket aC
aJ
aB aC
aB
Tab. 4
To protect the end positions:
 Use emergency buffer or shock absorber (èAssembly instructions of the accessory used).
To avoid contamination:
 Use slot covers in all unused grooves.