A customer had an application where encoders were
installed on motors that would run for long periods of
time. Shafted encoders were specified and were
installed on the motors at the job site. Shortly after
the encoders were installed the flexible couplings
started to fail. They were immediately replaced and
once again broke in short order. A closer look at the
encoder revealed bearing damage.
The engineer on site decided to measured the end play
of the motors and after checking several, found that it
was averaging about 0.10". This was twice the
coupling rating and explained why the couplings were
breaking and why the encoders were being
overloaded. How could this endplay problem be solved?
Answer: The engineer called a BEI applications
specialist, who offered a solution. Since the customer
was able to put a 1-inch diameter stub shaft on his
existing shaft, an HS35 (Hollow shaft encoder) with a
1" shaft bore was recommended. The unique Slot Block
tether (R1) option offers a large amount of axial play -
more than a conventional flexible coupling. With this
option, the encoder will simply slide back and forth
along the tether's dowel pin and can easily
accommodate a large endplay.
No matter how difficult your application, give us a call.
We might just have a solution.
Contact our Applications Specialists . . . »