FAQ - Pneumatic drives

Only the foremost piston (piston rod side) has a magnet for sensing, so position sensing can only ever occur in the sensor slot area on the foremost profile barrel.

They can be used in several places, such as on conveyor belts or for vertical lifting in tight spaces. One advantage of rodless cylinders is that they have identical cylinder force in both directions. In addition, it is not necessary to observe the buckling force of the piston rod when using these cylinders.

No. The shock absorber retainers can be mounted far enough outward for the stroke not to be affected by the use of shock absorbers.

Delivery includes the shock absorber retainer for the slide unit type DADP, one or two type adjustable stops KYC (for mechanical end-position limiting) and the shock absorber type YSR or YSRW.

However, the external intermediate position module can only be selected in the product configurator if a shock absorber and mechanical end-position limiter have already been selected.

An existing drive can also be retrofitted with an intermediate position module by ordering the corresponding accessories (DADP, DADM, KYC and YSR(W)).

Sample circuit diagram

The two sizes 8 and 12 are only available with a supply port in each end cap. With sizes 18 and higher, both supply ports are located on one side (exception: variant "D2" which has a supply port on each side). In the standard design, the air supply ports are in the right-hand end cap (runner upwards and slide unit to the rear - see illustration).

The following table lists the part numbers of the respective hydraulic shock absorber.

GF - Plain-bearing guide
KF - Recirculating ball bearing guide

Installing additional slides reduces the selected stroke length by at least the amount of the slide length(s). If the slides are also mounted on the guide rail with a certain spacing between them, the stroke length is further reduced by the length of the spacing. To return to the originally intended travel distance, the length of the slide and, where applicable, the spacing between the slides must be added to the stroke length when ordering.

The cushioning time is included in the swivel time for semi-rotary drives DRQD. For the swivel modules DSM, the swivel time is only shown up to the point where the shock absorber hits the stop. The cushioning time of the shock absorber must be added to this in order to obtain the total swivel time (see catalogue documentation for values).

The sensor slot is at the rear and the drive shaft is at the top. If the supply ports are located on the left-hand side (see illustration), it is the AL variant (supply port on the left). In contrast, if the supply ports are located on the right-hand side, it is the AR variant (supply port on the right).

Rotary drives DRQD-... are adjusted at the factory to a nominal rotation angle (90° / 180° / 360° / X°)

To change the rotation angle:

Rotary drive with end position cushioning DRQD-…-PPVJ:

• To increase the rotation angle: turn the adjusting screw anti-clockwise
• To decrease the rotation angle: turn the adjusting screw clockwise

Rotary drive with shock absorber DRQD-...-YSRJ:

1. Loosen size 1 hex nut (width across flats: 1)

2. Set the rotation angle on the size 2 hex nut using an open-ended spanner

• To increase the rotation angle: turn the adjusting screw anti-clockwise
• To decrease the rotation angle: turn the adjusting screw clockwise

3. Tighten the size 1 hex nut.

When you are looking towards the drive shaft, the woodruff key is at the top. The drive shaft then moves clockwise.

The slot nut of type HMBN-5-2M5 with part no. 186566 can be used for mounting.

This was done to make the mini slide DGSL more comparable with the previous mini slide of type SLT, which has two pistons and which would therefore have greater cylinder force for the same size when compared with the DGSL. For this reason, the piston on the DGSL is always one step bigger than the type code specifies, so as to give a similar cylinder force as the slide SLT for the same model size.

Maximum tightening torque for the retaining nut on the cylinder housing of the EGZ for a minimum screw-in depth (according to nut width):

In order for the O-ring of the EGZ to seal the drive in the hole, the following hole diameters must be adhered to.

In case of a pressure failure, the piston rod is clamped. The clamping unit is controlled separately.

Sample circuit diagram

Two sample circuit diagrams

Sample circuit diagram

No, the bearings are tensioned during installation so that they are backlash-free.

Festo offers cylinders for the low temperature range down to -40° C.

The theoretical force of a pneumatic cylinder can be calculated using the following formula:
F [N] = p [bar] x A [cm²] x 10

Example: A cylinder with a nominal diameter of 100 mm has an area of 78.5 cm². At an operating pressure of 6 bar, this area exerts a force of approx. 4700 N (78.5 x 6 x 10).

Eine allgemein gültige Aussage ist hier nicht ohne weiteres möglich. Die maximal mögliche Geschwindigkeit bzw. die erzielbare Verfahrzeit hängt von anwendungsspezifischen Parametern ab. Einfluss haben z. B. die Zylindergröße, der Zylinderhub, die Endlagendämpfung, die Einbaulage, evtl. zu bewegende Massen und externe Zusatzkräfte sowie die Ansteuerung des Zylinders (Ventile und Schläuche).
Zur Ermittlung der erzielbaren Verfahrzeit können Sie unser pneumatisches Dimensionierungsprogramm "ProPneu" nutzen. Das herunterladbare Programm finden Sie auf der Festo-Hompage in der "Download Area" und dort unter "Download Software --> Produktgruppe Engineering-Tools --> ProPneu Pneumatische Dimensionierung".

Two sensor retainers for sensors SME/SMT-10, complete with mounting material, are included in the delivery of the guide unit. A replacement sensor retainer can be ordered as a spare part under part no. 391321.