11
Fault clearance
Malfunction
Possible cause
Remedy
One-way flow control valve not
installed correctly
Control flow of exhaust air, if possible
(not supply air).
Install the DGC-HD in such a way, that
it is free of tension (evenness of the
bearing surface:
è
Tensions
Align the DGC-HD so it is exactly paral-
lel to the second axis
Grease the DGC-HD
(
è
Irregular move-
ment of the slide
Roller bearing/bearing guide is defect-
ive
Send the DGC-HD to Festo for repair
Loads too high
Reduce payload/travel speed
Slide does not
move
Retaining screws for the payload are
too long
Observe the maximum screw-in depth
(
è
6.1.2 Installation of the payload)
Seal worn
Replace wearing parts:
–
Self-repair with a set of wearing
parts
–
Return to Festo for repair
When the linear actuator is unpressur-
ised, move the slide by hand through
the entire stroke twice
(if necessary, move fixed stops into the
end position)
Heavy leakage
Sealing band pressed/sucked in
Avoid negative pressure in the piston
chamber (e.g. only move the unpres-
surised slide slowly when the valve is
disconnected).
Lack of volume air
–
Increase connection cross-section
–
Connect volume upstream
Cylinder does not
reach the desired
speed
High friction or counteracting force
Observe limit values
Tab. 8
Fault clearance
15
Festo — DGC-HD — 2018-10b
