Festo DGE Serie Instrucciones De Utilizacion página 54

DGE−...−ZR/−SP
To secure a controlled braking path:
· Make sure that this condition is always observed: s > n.
Only in this way can you avoid states with undefined positions after incorrect
programming of the article ( e.g. overtravelling of the proximity switches).
Switching travel s of the SME−8−... or of the SIE−... if the original switch lugs
are used (è Fig. 24).
Braking distance n, which can be achieved at the maximum speed
(determination of the braking distance: empirically under load or calculated
from the motor braking torque)
Toothed belt types
DGE−...−ZR
...−8−...
...−12−...
...−18−...
...−25−...
...−40−...
...−63−...
Fig. 24: Switching travel s of the proximity sensor at room temperature
Deviations with s < n:
· Use proximity switches and switching lugs (accessories).
· Observe that the switching travel s depends on the length of the magnet if
magnetic proximity sensors are used. If necessary, use inductive proximity
sensors and switching lugs.
If the magnetically actuated proximity sensors are positioned correctly, the
slide will not overtravelled them. This will prevent incorrect circuits at the
article.
If inductive or mechanical limit switches are used:
· Use switching lugs of length d (è Fig. 29).
54
SME−8... SIE−...
7.4 mm
9.9 mm
7.0 mm 77 mm
14.0 mm 97 mm
22.0 mm 159 mm
26.0 mm 222 mm
Spindle types
DGE−...−SP SME−8...
...−18−... 7.2 mm
...−25−... 7.0 mm
...−40−... 12.0 mm
...−63−... 20.0 mm
Festo DGE−...−ZR/−SP 0909f English
SIE−...
77 mm
97 mm
159 mm
222 mm