Festo DHTG - Manual (Page 30)

DHTG
30 Festo – DHTG – 1404d English
For setting the cushioning:
• Loosen the clamping element (K) one rotation.
• Screw in the adjusting screw 6 until the desired cushioning
is achieved. The rotary indexing table must not strike hard
against the end stops and the overload protection must not
be triggered. The maximum moment of mass inertia must
not be exceeded.
6 (K)
Fig. 11
Adjusting screw direction of rotation 6 Reaction
Clockwise
1)
Cushioning is increased
Anti-clockwise Cushioning is reduced
1) Screw in the adjusting screw until it is flush
Tab. 14
• Tighten the clamping element (K) again.
Tightening torque
Size 65 90 140 220
Width across flats 2.5 2.5 4 4
Tightening torque [Nm] 0.8 0.8 2.5 2.5
Tab. 15
7 Operation
Warning
Risk of injury from rotating masses.
• Make sure nobody can place his/her hand in
the positioning range of the DHTG and that
no objects lie in its path (e. g. by providing a
protective screen).
• Note the moment of mass inertia as a factor of the switching or cycle frequency ( Characteristic
curves).
– The maximum achievable switching frequency as a factor of the moment of mass inertia can be
read in the diagram Switching frequency. The switching time can be calculated from this
by T = 60/f. The response time comprises: Switching time = unlocking, turning, locking and the
return stroke of the work piston.
Fig. 12