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Here are some Frequently Asked Questions from our customers:
<Q> My linear encoder isn't giving me the accuracy I
need. Is it faulty?
<A> The encoder accuracy is guaranteed by the manufacturer
and unless it has been damaged mechanically, it is most probable that
any accuracy errors are caused by the equipment the encoder is mounted
to. Most errors are caused by problems with the slideway bearings. They
may be worn, badly adjusted, misaligned or simply not up to the job. Whichever
way, if the slideway isn't running true you will get noticeable errors
in the measuring system. This is a complex subject. Please contact us
for more information if you need it.
<Q> What is the difference between accuracy and resolution?
<A> Resolution has very little to do with accuracy. Consider
your regular 12" ruler. Let's say it's divided into Inches and 10th's
of Inches. The resolution, the finest division on the ruler, is one tenth
of an Inch. But how accurate is it? If the graduations were spread over
12.5" instead of 12" the number of divisions (resolution) would remain
the same but the accuracy would be 0.5" different from an absolute measurement
of 12". If the accuracy of the ruler was stated as 12" +/- 0.5" then the
ruler would be within specification. The same analogy applies to linear
encoders and digital position readouts. If the accuracy isn't specified,
don't be fooled into believing that resolution means the same thing.
<Q> Why do you offer so many different types of encoders?
<A> Because there are so many different applications. All
the following factors affect the choice of encoder; environment, slideway
alignment / runout, vibration, available mounting space, vulnerability,
accuracy, output requirements, length of travel and (last but not least)
cost.
<Q> Can you build a turnkey system for us?
<A> We have built several special gauges, fixtures and work
stations which have been very successful but we decline larger projects
preferring to recommend established specialist manufacturers. If you have
a small scale project that you would like to discuss with us, we welcome
your email.
<Q> Can you supply customised encoders?
<A> We have built up relationships with some excellent European
manufacturers and already supplied custom designed encoders for OEM's.
If you are looking for a special encoder please email us withyour exact
requirements.
<Q> Can you supply an encoder on loan for us to evaluate?
<A> Yes we can, please contact us for details.
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