attaching work to rotary on DIY table

[High Seas]

Here are the three pieces of the puzzle. I got the encoder (oops I mean the gearbox ) apart and these are the relevant bits.

Note the dissimilar metal in the encoder (gearbox) shafting mount. I think I may wind up "loosing" the large diameter disk (with the 3 short shafts - they hold other gears in place in the gearbox) when I try and bore/drill the main shaft. In any case, the 3 short shafts are in the way. I suppose I could build a coupling that mounted the -------- shaft to the PACSCI motor - but the height really starts to stack up then -- nearly the length of the original Globe Motor!

Anyhow, I'd like to keep the _________ shaft as long as possible. The largest diameter of the ________ shaft looks like a good spot to place a set pin or screw.

Follow ups as i get it sorted.


Jim

[Graham S]

The encoder is on the other end of the motor, i.e an optical encoder that gives feed back to the origional motor controller.

What you are showing is a disassembled planetary gearbox.

The dissimilar bit is a weld.

Graham

[Graham S]

And please don't even think about boring out that shaft without a lathe.

[under-dog]

I use a sherline rotary with a 4 jaw chuck.

The chuck attaches to the rotary with a threaded adaptor spececifically made for the task. The rotary attaches to the mill table with 90 degree adaptor.

The 4 jaw works well because it will grip flatstock and hold it between a tailstock or it will grip square or round stock. Round stock being my preferred method. I usually mount my wax or pewter rough stock to a round mandrel which is mounted in the chuck.

The method I mentioned works well for those two materials(wax pewter) and improvision will obviosly be needed for other materials.

[High Seas]

Graham - missed your post and headed to the workbench.
After much careful consideration and a bit of luck, I got the pilot hole and the follow up --"Spot On."
Then used a sizable drift punch and popped the shaft out of the planetary hub. Was press fit into the center - note the splines on the shaft and in the hub.

The hole is deep enough to permit me chopping the splined portion off the shaft.

I could find no useful bits on the encoder end - so dug into the gearbox. Figured I'd find some joy there - as that the business end that drives the rotary!

Now to find a set screw (tap, etc) and I'm away! Well, soon time to tackle another project.

Jim

[Graham S]

I think you might have had too much of the beer from those smileys, you called it an encoder shaft 5 times!

Glad you got it sorted out and I hope "spot on" is good enough.

Graham

[High Seas]

Same error when I did the photos
-- beer? Wot not RUM! (maybe G&T)
AND I did learn too - the Planetary (gear) Shaft! [But wasn't until your post minus 1 I got it sorted]

SEE - EXPERIENCE! Just hope there is no bill to pay - else I have another one waiting in the wings as a spare if I need a redo.
Jim
I'll work the stack up tomorrow and see how it all fits together. Then we'll know if we're close enuf. It'll be a few days 'til trial/ops check - other projects gotta fall into place first.

[studysession]

Like the mount. I want to use your design, I like that. Also looks more sturday than what I am doing.

Been dealing with family problems so not been working on it few couple weeks. I want to get it done and really like the mount you made.

Thanks for posting.

[studysession]

High Seas -
You just punched this out? How hard was it?

[High Seas]

studysession -
Yep - but I cheated a little bit. I had drilled the shaft (That"s the Planetary gear Shaft!), then put the punch down the hole and a few gentle taps - bing! Sweat as you please.

I gotta admit I feel very lucky getting as close as I did on the drilling. Take care in that bit! Might use the lathe as Graham suggests. And caution -- my PACSCIs are 1/4 inch shaft - so that doesn't leave a lot of meat when you get to the sides of the planetary shaft where its flattened for the gear.

As a compensation I didn't drill as deeply as I'd have liked. SO I get to make a new backing for the mount (tomorrow maybe) to take up the void.

I suspect you could just whack away with a drift punch before drilling. I built a small wood jig to use on the drill press and the whacking place.

Didn't shoot any pics of that incriminating activity

Hope that helps Jim