Festo DNCV Serie Instrucciones De Utilizacion página 32

DNCV−...
3. Slowly pressurize the compressed air port aA.
The piston rod moves into the retracted end position.
4. Start a test run at low frequency and at low impact speed.
During the test run:
Check to see if the following settings on the DNCV−... need to be modified:
S
the speed of the piston
the end position cushioning
the accurate adjustment of the proximity switches on the adjusting
wheel 7.
Setting the speed of the piston:
Slowly tighten the adjusting screws 3
S
and 4 in an anti−clockwise direction until
the desired speed is reached.
Accelerate the moveable mass step−by−
S
step until the operating speed is reached.
Please refer to the calculations for your
application for these speeds.
Setting the end position cushioning:
Tighten the adjusting screws 8 for both
S
end position cushionings in an anti−clock
wise direction under the following condi
tion:
the piston rod reaches the end position
without knocking hard against it.
If the piston rod strikes hard:
use external shock absorbers of sufficient size.
use stops of sufficient size.
increase end position cushioning.
reduce speed.
5. Conclude the test run.
32
S2 Diag S1 1214
Fig. 17
S2 Diag S1 1214
Fig. 18
Festo DNCV−... 0303b English