Festo DGE Serie Instrucciones De Utilizacion página 62

DGE−...−ZR/−SP
3. Shift the hardware limit switch for the relevant end position up to its
switching point in the direction of the slide.
Fig. 34
SF
Mag = Magnet
4. Fasten the hardware limit switch exactly at this point.
If magnetic proximity sensors SME−... are used :
· Note that the switching magnet on the inner slide is arranged asymmetrically.
As a result, the proximity sensors are distributed asymmetrically on the DGE.
5. Repeat the last four points in the other end position.
6. Push the slide into the end positions.
You can then check whether the hardware limit switches function correctly and
whether the switching lug (if available) is seated free of play.
7. Fasten the safety limit switches at point S between the relevant mechanical
end position (W) and the nearby hardware limit switch.
The following then applies:
A braking path of length n remains between the response point of the
hardware limit switch and the response point of the safety limit switch.
The response ranges (grey bars in Fig. 35) of the safety limit switch (SS) and
the hardware limit switch (HW) overlap. In this way you can avoid
undefined operating states when the axis is switched on.
In spite of the defined end position S being overrun, the safety limit
switches remain actuated up to the mechanical end position.
If the slide is set correctly, it will brake completely when overrunning a
hardware limit switch before the safety limit switch responds.
62
H
h
SIE−...
= Switching lug
SF
Mag
SME−8...
Festo DGE−...−ZR/−SP 0909f English