PLEASE NOTE: THIS IS HAUSER GERMANY MANUAL.
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Technical
data
19
Stroke:
The stroke to be specified in the order code is the maximum mechanical stroke between
the internal end-buffers. It consists of:
Stroke
=
Usable right safety left safety 20mm*
4
The right and left safety travel is in each case the safety travel which is required in order to slow
the linear actuator to rest without hitting the mechanical end stop, using an emergency stop
ramp after hitting a limit switch. F shows the transferable thrust force (see
Table 9
) for each
actuator and may not be exceeded. In the event that the braking force resulting from the maxi-
mum braking torque of the drive or brake is less than F, you will need a longer safety travel. The
delay time of the control unit must also be taken into consideration. Where appropriate, addi-
tional shock absorbers may need to be mounted.
2.7.1 Establishing required safety travel
8000
1000
10000
100
5
4
3
2
1
0,8
0,6
0,4
0,2
1000
800
600
400
200
100
80
60
40
20
10
8
6
4
2
1000
800
600
400
200
100
80
60
40
20
10
8
6
6000
4000
2000
800
600
400
200
F [N]
s [mm]
v [m/s]
LBB080
(F_nom. with
hollow shaft
bearing)
m [kg]
2000
1
2
3
4
5
Key:
m:
Effective load in kg (for an HPLA with rack-and-pinion drive please add the weight of the motor and the gearbox to
the effective load)
v:
Velocity of linear actuator before slowing down in m/s.
F:
Braking force of drive during the emergency stop ramp in N.
s:
The required safety travel s in mm that results from the moved weight, velocity and braking force.
Example:
The example in the diagram shows the determination of a safety travel for a HPLA80 with 50 kg
effective load (2), slowed-down from a velocity of 2 m/s (3) with the permissible thrust force for
this actuator F_nom. (925 N) (1). The required safety travel is then approximately 110 mm (5).
*
4
We recommend to add approximately 10mm additional travel on each side as compensation for the hysteresis of the limit switches
or - depending on the control unit - as additional travel for a software limit stop.
