What is the MTTF (Mean Time To Failure) for RM/RE encoders?
Encoder system reliability
MTTF (M) = p × t / n
|
where |
p |
installed population of readheads |
|
|
t |
average length of service |
|
|
n |
total relevant failures |
From our records (yearly production figures and failure data), readhead MTTF in continuous use is 750 years.
As a practical example, if a customer has 50 machines each containing 2 encoders, the installed readhead population (p) is 100. The mean interval (t) between any readhead failure (i.e. n = 1) may be calculated by rearranging the MTTF formula:
|
t |
= |
M × n / p |
= |
750 years × 1/100 |
= |
approximately 7.5 years |
Therefore with a total of 100 readheads running 24 hours per day, this customer could expect a single readhead failure approximately once every 7.5 years.
This information is not a guarantee of product reliability and does not represent a condition of warranty.
Note: For RE encoders you must also take into account the bearing life which can be found in the RE datasheets.