Homemade CNC Indexer

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JimGlass
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Joined: Sat Jan 04, 2003 8:33 pm
Location: 40 Miles West of Chicago/near DeKalb
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Homemade CNC Indexer

Post by JimGlass » Thu May 31, 2012 5:38 pm

The indexer is complete and works quite well. Backlash is very minumal. I used a 30 tooth wormgear and worm purchased on Ebay. I wanted strong gears.

Image

larger picture

See it run, Careful audio is loud

To address the backlash issue I mounted the worm and worm gear is separate blocks of
castiron. I surface ground the mating surfaces to reduce backlash (gear clearance) and not have the gears bind. I have the backlash to almost "0"

Image

The worm is mounted in its own block of castiron and inside a pocket. Endplay of the worm is in the area of .0005". Notice the key is about the same length as one of the spacers. I almost made something that could not be assembled.

Image

Larger view of worm assembly

Surface grinding the gear fit.
Grinding gear fit

More pics of Indexer

Hope this was of interest.
Jim
Tool & Die Maker/Electrician, Retired 2007

So much to learn and so little time.

www.outbackmachineshop.com

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