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Rotary tables and Spindle gears, oh my.

When I bought my CNC Vertical Mill and Lathe tools, my initial reason was so I could cut gears and special parts for a redesign of C.L.I.V.E.. I've finally gotten the tools and parts needed to start on that.

Here's my first (nearly) completed part. It's a spindle for one of the rotary units used in the turret to aim the laser. Click on the thumbnail for a larger image.

Spindle gear for C.L.I.V.E. rotary unit.


( 9 comments — Leave a comment )
Mar. 1st, 2006 04:42 pm (UTC)
WOA.....Mechanics jewlery!
Mar. 1st, 2006 06:26 pm (UTC)
Can you create gear profiles from a known template? (Do you just specify a pitch diameter and a spline profile and let the program fill in the deatils) or is it a matter of 'hand' drawing a spline a replicating it for the full pattern?
Mar. 1st, 2006 06:48 pm (UTC)
I wrote a program that generates G-code for a given number of gear teeth, helical angle, thread pitch, and feed speeds. I had originally designed the code to do the involute curve by using a compound motion in multiple passes, but then I found gear cutters wheels that have the involute curve built into their cut.

So, 72 sweeps of the gear cutter later, we have the 72 tooth spindle gear shown above. If you look closely, you can see that it has a 2.5 degree helical angle to the teeth, so that I can mesh it with a worm drive.
Mar. 1st, 2006 06:53 pm (UTC)
I could probably re-create the involute curve creating code, to provide correct involutions for arbitrary gear sizes. You would need to use a clock gear cutter though, for its 0 degree pressure angle.
Mar. 1st, 2006 11:02 pm (UTC)
Insert further @envying here =^.^=.

One of the first things I'm doing when a mill makes its way down my budget list is build a clock. Gear mechanisms are nifty.

Mar. 2nd, 2006 06:52 am (UTC)
Indeed. Cameras are also a good way to make lots of little fiddley bits.
Mar. 2nd, 2006 06:46 am (UTC)
Very nice, though to pick nits, you should get a parting tool to take off that last bit of shoulder between the toothed and top (in the picture) section). Functionally nessisary? Probably not. Offending my machinist's sensabilities? Quite.
Mar. 3rd, 2006 11:47 am (UTC)
That shelf is actually needed to keep the wrong part of the bearing from rubbing against the gear.
Mar. 3rd, 2006 08:27 pm (UTC)
well then, I'll shut my yap!
( 9 comments — Leave a comment )