Commissioning An Individual Unit; Installing The Pneumatic System; Electrical Installation; Commissioning The Complete System - Festo DSM-12 63 B Serie Manual Del Usuario

8. Repeat the adjustment for the other end position.
9. Press the cover cap of the DSM back
onto the snap ring of the housing
(Fig. 19) (if present).
The cover cap can also be snapped
on to freely positioned shock
absorber retainers if the elements
are broken through at the
predetermined breaking point.
Observe the fitting instructions for
the cover cap.
When all stops have been adjusted:
• Check whether additional shock absorbers or stops are necessary.
Additional shock absorbers or stops are necessary in the following cases:
– for moving masses with a mass moment of inertia greater than the
determined permitted mass moment of inertia
– when the DSM is operated without an air cushion on the exhaust side
(e.g. with pre-ventilation on the exhaust side).
Shock absorber retainers for internal fitting of shock absorbers/elastomer
shock absorbers can be ordered separately and installed on the DSM
( Accessories).

4.4 Installing the pneumatic system

• Use GRLA one-way flow control
valves for setting the swivel speed.
These are screwed directly into the
compressed air ports (Fig. 20).
For eccentric masses:
• Check whether HGL controlled non-return valves or a VZS compressed air
reservoir are necessary.
In this way you can prevent the moveable mass from sliding down suddenly if
there is a sudden drop in pressure.

4.5 Electrical installation

For sensing the end positions:
• Place the proximity switches (B) as follows (Fig. 21, Fig. 22):
DSM(-T)-12 ... 40-...-B
• Fasten proximity switch
SME/SMT-10 (B) on the groove (A)
with a sensor bracket (C).
The proximity switch is actuated by
magnets (D) in the stop lever.
DSM(-T)-63-...-B
• Fasten proximity sensor
SME/SMT-8 (B) in the sensor
bracket (E).
The proximity switch is actuated by
magnets (D) in the stop lever.
Exact type designation of the proximity switch and sensor bracket
under www.festo.com/catalogue
5 Commissioning

5.1 Commissioning the complete system

• Pressurise your entire system slowly.
There will then not be any uncontrolled movements.
Fig. 19
Fig. 20
(A)
(B)
(C)
(D)
Fig. 21
(B)
(E)
(D)
Fig. 22
Accessories

5.2 Commissioning an individual unit

Warning
Risk of injury from rotating masses.
• Make sure that the DSM is set into motion only
when the safeguards are fitted.
• Make sure that the swivel range of the DSM
– is safeguarded to prevent anyone from reaching
into the swivel range
– no objects lie in the positioning path (e.g. by
providing an individual protective screen).
1. Close both upstream one-way flow
control valves:
– first close completely (Fig. 23),
– then open them again
approximately one turn.
2. Make sure that the operating conditions lie within the permitted ranges.
3. Pressurise the drive in one of the following ways:
– slow pressurization of one side
– simultaneous pressurization of both sides with subsequent exhausting of one
side.
4. Start a test run.
5. During a test run check whether the following settings on the DSM need to be
modified:
– the swivel range of the moving mass
– the swivel speed of the moving mass.
– the cushioning setting for DSM-...-P1.
6. Unscrew the one-way flow control
valves slowly (Fig. 24), until the
desired swivel speed is set. The stop
lever should reach the end position
safely, but not strike hard against it.
Note
If the impact is too hard, it will cause the stop lever to rebound out of the end
position, resulting in a reduction of the service life.
If the stop lever can be heard to strike hard:
7. Interrupt the test run.
Causes of hard knocking may be:
– mass moment of inertia of the moveable mass too high.
– swivel speed of the moveable mass too high.
– no compressed air cushion on the exhaust side.
– insufficient shock absorption.
– shock absorption at DSM-...-P1 set incorrectly.
8. Make sure you remedy the above-mentioned causes.
9. Repeat the test run.
When all necessary corrections have been made:
10. End the test run.

5.3 Fine adjustment of the end positions

Note
A shock absorber that is screwed too far in or out results in the stop lever:
– either hitting the shock absorber retainer without shock absorption or
– hitting the shock absorber at an impermissible angle.
In such a case there is a risk of the DSM or the shock absorber being
destroyed.
• Make sure that you do not screw the shock absorber in or out any further than
shown in the following table.
Otherwise the shock-absorbing performance of the shock absorber/
elastomer shock absorber will be insufficient or even completely ineffective.
• Pressurise the desired end position on the DSM.
The end positions can be adjusted under pressure.
Fig. 23
Fig. 24