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Old April 23, 2019   #346
Worth1
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With luck the mechanism should arrive tomorrow.
Cant wait to tear it down clean and make any if need be finishing improvements.
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Old April 25, 2019   #347
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Made an aluminum T Nut with a 3/4 router bit the drill press and the XY Table.
I touched off on the side used the dials on the table moved in .335 and it came in dead on.
With the depth adjustment nuts I made some time ago I can get depth of cut pretty accurate.
I'm only taking off about .020 at a time down no side load to speak of.
Now all I need to do is dril and thread it.
My drill press vice sucks big time.

IMG_20190425_27321.jpg

IMG_20190425_38284.jpg

IMG_20190425_49464.jpg
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Old April 26, 2019   #348
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Here is one of the finished T slot nuts compete with threads.
IMG_20190426_4703.jpg
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Old April 27, 2019   #349
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Absolutely worthless contraption.
Made with rotary table set horizontally on XY table.
Imperfect hex to fit 5/8ths wrench on one side and 8 offset spokes on the other.
Simply an exercise in the use of the machine.
IMG_20190427_663.jpg

IMG_20190427_21527.jpg

IMG_20190427_34835.jpg

IMG_20190427_4784.jpg

IMG_20190427_55857.jpg
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Old May 1, 2019   #350
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Been tossing around all kinds of ideas on how to affix my rotary table and tail stock to the X-Y table.
None of the factory bolt holes line up from the rotary table to the X-Y table.

Once I get everything made I will show a few pictures of what I came up with.
It is going to take some time and work to make everything and modify the tail stock.
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Old May 1, 2019   #351
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The only 3/8 16 tap I can find gave up the ghost.
It didn't break but it refuses to start.
Will go to NAPA tomorrow and get a fresh new high quality Japanese tap.
Will NOT be going to Home Junkpot.
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Old May 2, 2019   #352
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Store fresh out of 3/8 16 taps but had 3/8 24 so I just changed to 3/8 24.
No big deal and more clamping power.
I have a ton of holes to line up drill and tap or drill clearance holes.
Plus lathe work to do.
All this so I can set up to make stuff.
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Old May 2, 2019   #353
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Got the tail stock supported.
The shiny steel plate you see I found at work on the ground.
It didn't look anything like this before I put it in the lathe and faced it off on both sides.
Did this some time ago and had no idea what I was going to do with them.
T Nuts made from 5/8ths grade 5 bolts faced off on the end to thickness,center drilled, cut to length drilled and tapped.
will show later.
This is how I managed to get the tail stock to fit the table.
Pictures next post.
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Old May 2, 2019   #354
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Here they are took my sweet time doing it because I only had one shot at drilling holes correctly in the tail stock.
I drilled them with the tail stock upside down.
The homemade T Nuts fit perfectly in the T slots.

In the first pictuer you will see where I drilled and tapped the plate to attach on cap screw.
Then I went on and did them one at a time making sure everything was in alignment.
Once all were drilled and set I then drilled out the tapped portion to a bigger size to allow for wiggle room to make for perfect alignment with the other part of the contraption.
IMG_20190502_45660.jpg

IMG_20190502_925.jpg

IMG_20190502_23807.jpg
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Old May 2, 2019   #355
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Just letting you know that I've been reading.
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Old May 3, 2019   #356
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Quote:
Originally Posted by AlittleSalt View Post
Just letting you know that I've been reading.

Thank you Salt.
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Old May 3, 2019   #357
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I'm finished.

I took the other plate I made, drilled two clearance holes for cap screws to connect to T nuts in the T slot.
Drilled and tapped 1/2 20 threads for the other bolts to connect to the plate.
Had to drill out smaller washers so they would have room to fit in the rotary table.
It was the easy way out, I could have made custom ones.
The apparatus sits on a cantilever of sorts and very ridged.
In last picture you will see one of my homemade T Nuts.
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Old May 3, 2019   #358
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Here they are, I think I used just about everything in the book to do it.
From my parallel set to the height guage.


IMG_20190503_528.jpg

IMG_20190503_27910.jpg

IMG_20190503_54750.jpg

IMG_20190503_10174.jpg

IMG_20190503_29840.jpg

IMG_20190503_47390.jpg
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Old May 3, 2019   #359
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Here is a mockup demonstration of how this all fits together using a lathe dog to rotate the part.
The lathe dog is the gray thing attached to the shiny rod.

Lathe dog.
https://en.wikipedia.org/wiki/Lathe_carrier
IMG_20190503_54255.jpg
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Old May 9, 2019   #360
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Been looking out of curiosity about what indexing plate it would take to cut 91 and 127 tooth gears.
None of mine will do it.
Found an on line calculator to see if I could come up with the right plate with the right amount of holes to do it.
None will do it.
I came to the conclusion it would have to be compound indexing where you not only use the holes but turn the plate too.
No way can I do that.
Then I found old manuals from years ago where they di do such a thing.
Something they dont do anymore.
It is some really old school stuff involving a lot of math.

Here is a link to an old book on indexing with more information than you would ever want.
I ended up in a rabbit hole about helical indexing in another old book from the late 1800's.
You can start from the beginning if you want.
This is how they did it before computers and the reason it is here.
http://babel.hathitrust.org/cgi/pt?i...iew=1up;seq=79
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