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Encoder shaft connection?

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#1 Gordon Rayner

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Posted 26 March 2013 - 12:29 PM

Recently was shown some stainless steel bellows shaft connectors, for 1/4 inch shafts, after describing to the salesman the problem of compensation for mismatches in parallelism, angles, and separation , when mounting an encoder.

I bought a few surplus/used specimens , and later Googled these devices, finding that these things are $$ if new.

What is the usual practice for telescopes or robotics?

U-joints, similar to automotive driveshaft links, either all-metal, or polymer, or a mix? Or, a length of small diameter rubber or other polymer tubing? Or, those expensive bellows-style connectors?

#2 Tom and Beth

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Posted 26 March 2013 - 11:36 PM

I've used Vacuum line from the auto store many times. Kept an extra couple of inches in the EP box. Not sure how pliable it stayed when going down into the single digits but then, I wasn't willing to find out :lol:

#3 Geo.

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Posted 29 March 2013 - 08:20 PM

What is the usual practice for telescopes or robotics? U-joints, similar to automotive driveshaft links, either all-metal, or polymer, or a mix? Or, a length of small diameter rubber or other polymer tubing? Or, those expensive bellows-style connectors?


All of the above.

#4 Starhawk

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Posted 29 March 2013 - 08:55 PM

Also consider belts- they solve certain problems.

-Rich






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