Festo DRQD-40 ... 50-... - Handbuch (Seite 65)

DRQD−...
Festo DRQD−... 0907e English
65
If the piston can be heard to strike hard:
8. Interrupt the test run.
Causes of metallic knocking may be:
ć Mass moment of inertia of the moving mass too high
ć Rotation speed of the moving mass too high
ć No compressed air cushion on the exhaust side
ć Shock absorber has been screwed out too far (only for
DRQD−40/50−...−YSRJ)
ć Cushioning component has been screwed out too far (only for DRQD−...−P1J)
9. Make sure you remedy the above−mentioned causes.
10. Repeat the test run.
Once all necessary corrections have been recorded:
11. End the test run.
Commissioning mid−position module (not for DRQD−...−P1J)
Warning
Eye injuries can be caused by extended piston
rods.
S In the positioning range of the DRQD−...−Z1,
be sure that:
ć Nobody has his/her head in the direction
of operation.
ć There are no foreign objects present
(e.g. Allen key in piston rod).
Note
S Also consider the following points:
Ĉ The mid−position module may not be pressurized if the semi−rotary drive has
been pressurised on one side (otherwise the resulting torque will be too low).
Ĉ The maximal permitted mass moments of inertia are observed.
Ĉ Two−sided pressurisation of the supply ports can lead to an automatic
movement from:
a) An eccentrically arranged useful load
b) The resetting force of the shock absorber
Ĉ The minimum cycle time is maintained (for maintaining the maximum
permitted mass moment of inertia of the functional variants DRQD−...−PPVJ;
è
Fig. 53).
Fig. 52