Page 120 - IGUS ECS CATALOG

Unsupported | Short travels

Speed, acceleration and service life
FL G service life Z
For unsupported applications, the acceleration
15
We recommend pivoting (a) is the more critical parameter than the speed
mounting brackets as Strokes [million] 10 (v). High acceleration can cause the e-chain ®
standard for unsupported to vibrate and reduce its service life. This is a
applications. We recommend 5 particular issue if the e-chain ® already has a
locking mounting brackets as sag greater than the FL G value. Max. values for
standard if speeds > 20m/s or acceleration (a), speed (v)and service life are
0
accelerations > 20m/s 2 0 5 10 15 20 achieved only with e-chains ® incorporating the
Acceleration a [m/s 2 ] FL G design. igus ® e-chain systems ® can sustain
Standard values on service life for FL G , very high loads. To date, a peak acceleration of
depending on acceleration 784m/s 2 has been achieved during continuous
use. The guideline values that result from
FL B service life Z
continuous experiments in the igus ® laboratory
15
Standard values and countless practical applications can be
of maximal speed Strokes [million] 10 obtained from the two diagrams for your design.
and acceleration 7 Our tests confi rm that these standard values
Unsupported FL G FL B 5 6 5 apply to all igus ® e-chains ® and e-tubes. It is
v max. [m/s] 20 3 crucial to determine whether the application will
v peak [m/s] 50 – 0 be designed as unsupported straight FL G or
a max. [m/s 2 ] 200 6 0 2 4 6 8 unsupported, with sag FL B .
a peak [m/s 2 ] 784 – Acceleration a [m/s 2 ]
Standard value of FL G service Standard values on service life for FL B ,
life: 10 million cycles
depending on acceleration

Contact surfaces
Unsupported igus ® e-chains ® normally require some type of surface on which the lower portion
of the e-chain ® runs. A wide range of confi gurations is available, as the drawings on the right
demonstrate. Many material options are feasible: metals, polymers, stone, wood, concrete, glass,
etc. We also have solutions to minimise the noise generated by the e-chain ® lower portion. When
selecting the running surface, please ensure that dirt and debris cannot collect in the e-chain ® path.

Mounting brackets
We recommend pivoting mounting brackets as standard for unsupported applications.
Pivoting mounting brackets compensate for the camber, can be installed more easily and
Different surfaces and decrease the load on the fi rst e-chain ® link in operation. Exception: if the acceleration is greater
support trays are possible than 20m/s 2 or if the height is limited to the H F measurement. In such cases, locking mounting
brackets keep the e-chain ® under the H F measurement.

Unsupported lower run
e-chains ® without support along the lower run have restricted use. The value FL U usually must
be determined in a test by igus ® . The maximum permissible amount of the projection depends
on the fi ll weight, the selected e-chain ® , the dynamics, and other factors. The combination of
FLU fi ll weight, e-chain ® type and FL U is always diff erent. If the lower run of the e-chain ® cannot be
FL U = Unsupported supported over the whole travel, please consult igus ® .
lower run

118 More information  www.igus-asean.com

05.06.23 18:29
03)-ASEAN-DESIGN 2022.indd 118
03)-ASEAN-DESIGN 2022.indd 118 05.06.23 18:29