Configuration guidelines | Selecting the cable carrier
Verification of the load values for unsupported arrangement The term “unsupported arrangement” describes the condition when the upper run moves parallel to the lower run across the entire horizontal travel length.
L S
L f
U B
L S /2
Upper run
L B
Lower run
KR
The unsupported arrangement is the most common use of cable carriers. The unsupported length L f resulting from the travel length, and its load on the cable carrier is determined with the cable weight to be guided q z from the load diagram. The load diagram therefore marks the area of the unsupported length L f in which the cable carrier has no appreciable sagging or, in reverse conclusion, the maximum cable weight at which the cable carrier does not yet sag. If the travel length or the cable weight increases above the value stated in the diagram, the cable carrier starts to sag.
The specific load diagrams can be found in the individual chapters. Please note that the diagrams were determined with a specific intrinsic cable carrier weight. This means that the usable additional load can be reduced for large cable carrier widths or for cover systems. Furthermore, the upper value q z in the diagram indicates the maximum additional load of the cable carrier. This value must not be exceeded. The figure on the left shows an example for a load dia- gram with the most important parameters for determin- ing the respective cable carrier load. According to definition, the unsupported length L f is the length at which the upper run of the cable carrier has no appreciable sag. For steel cable carriers, sagging is not permitted as a rule. The higher flexibility of the plastic cable carriers allow a slight increase of the additional load or of the unsupported length. As a rule, we advise against this unsupported arrangement with permitted sag L D for rea- sons of dynamics and appearance. Increased wear of the links also has to be expected. It cannot be ruled out, however, that in individual cases a solution may have to be implemented in this way at low travel speeds. In this case, please request the corre- sponding values from us. We will be happy to advise you.
20.0
q z max
10.0
5.0
q z
1.0
L f
L f in m
0.5
1.0
1.5
2.0
2.5
3.0
L S
L S in m
1.0
2.0
3.0
4.0
5.0
6.0
L f
L D
20.0
10.0
5.0
1.0
L f in m
0.5
1.0
1.5
2.0
2.5
3.0
L S in m
1.0
2.0
3.0
4.0
5.0
6.0
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