Efficiency
The efficiency factor of a cable system helps determine what series of cable to use in a given situation. Affected by the total degrees of bend in the cable, efficiently shows how much input force is needed to produce a desired output load. Use the following formula and tables to calculate:
Input Force = Output Load x Efficiency Factor
Output Load = Input Force ÷ Efficiency Factor
- Felsted® Pull HP Cables: Typical Efficiencies
- Felsted® Pull HP Cables: Typical Backlash vs. Degrees Bend
- Efficiency Graph
Routing/Measuring
Measure the cable along the path it will take from the points where the cable hubs will be anchored. Follow the actual cable path as closely as possible, allowing for the largest practical bend radii.
|
Optimum Life Bend Radii |
|
|
Series |
Operating Life Minimum |
|
3 |
HP Core: 3 inches |
|
4 |
5 inches |
|
6 |
7 inches |
|
8 |
10 inches |
Installation Notes: Control & Work End
Where a Felsted® cable is to be connected to objects requiring linear movement only (e.g. spool values), maximum life and efficiency is achieved by accurately aligning, in both plnes, the cable hubs and the controlled object. See illustration:
It is important to securely anchor the cable hubs. Looseness of the mounting bracket will be perceived as lost motion "sponginess" and will inhibit detent feel.
Also, clamping in the bend area may reduce bend radii under operating loads. Clamping at tangents to the bend is preferred.
For highest efficiency and long life in lever actuating operations, install the cable so that the highest loads are operated with tension (pulling), rather than compression (pushing).
Where the cable is connected to a lever, the cable will be mounted so that it lies on a plane (A) midway on the arc (B) described by the movement of the connection point on the lever (C).
All Felsted cables with rod and sleeve type end fittings have a built-in swivel to handle deflections up to 8".