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Compound needs a better degree dial

Darren said:
I did the same thing last night except I torched it, and pressure turned it against the chuck jaws. No chatter or singing this way.
Click to expand...

I like your approach to clobbering the chatter. Not sure how I would handle the plate detail that way though.

What are you making Darren?
 
Ok, the inside of the collet is done. Tight 1 thou clearance. Prolly 0.0008 or so. I need clamping on as much of the plate as possible. Maybe I should tape it....... If so, I'll need to open the collet a little more......

20241110_093402.jpg
 
I'll think on that a bit. Other things to do in the meantime. I need to drill and tap the ring for 3 or maybe 4 set screws BEFORE I cut it out. I have the perfect trepanning tool I already made to cut the collet plate out with.
 
Want a good laugh on me?

Mounting the plate so I can drill and tap for 3 or 4 set screws was a challenge. Do I really need to make another collet so I can hold the ring properly in my indexer to drill evenly spaced holes. Hmmmmm. Maybe I can use the collet I just made....

Then it hit me. The ring is already laid out with degree marks........ Doh!
 
Darren said:
Making an adapter ring to bolt a 10" chuck where an 8" chuck is supposed to go. I'm going to grip it from the outside now and trepan out the center.
Click to expand...

Cool! Very similar projects!

My degree ring will be held from the outside by the collet. So that part will be almost the same.
 
The degree wheel already has 4 holes that line up with the diameter of the compound base. So, I'll drill the set screw holes to intersect those holes. That way I end up tapping a through hole instead of a blind hole. What is not to like about that!

Four M3 set screws it is.

20241110_102338.jpg
 
TorontoBuilder said:
so lemme ask...

does this or will this project involve utilizing the hyper-precision dividing head you just acquired? I get the impression it does not
Click to expand...

No, unfortunately not. That's a curiosity investment that may never get used. I did think about adding a Vernier scale though. And who knows, with some luck, the two scales may end up doing that since their radius is slightly different. TBD.
 
Susquatch said:
No, unfortunately not. That's a curiosity investment that may never get used. I did think about adding a Vernier scale though. And who knows, with some luck, the two scales may end up doing that since their radius is slightly different. TBD.
Click to expand...

yah know, you're making me think I should have snagged that puppy for myself.

As a penalty you need to come up with a project JUST to use the dividing head
 
TorontoBuilder said:
yah know, you're making me think I should have snagged that puppy for myself.

As a penalty you need to come up with a project JUST to use the dividing head
Click to expand...

Well, I am working on trying to find a roller cabinet big enough to be able to slide that hippo up onto the mill table.....

And, knowing me, there will be a project that will require it!
 
Another project suddenly and officially on hold.

I mounted my 4 jaw and then centered the degree plate in the collet. I centered it to a half thou. Why so precise? Well.... why not? Of note, 4 ears were more than adequate. The collet grips extremely well - maybe too well......

20241110_131708.jpg

Then I cleaned up all the steel swarf to switch to aluminium. And then started trepanning the plate.

20241110_133203.jpg

You can also see my mistake above. The chip on my tool holder is too big. Rookie mistake. Slow and steady is better. I was too anxious to start and finish a big project before @DavidR8 could knock off another two dozen. Just as i broke through the plate, it grabbed like a crocodile and just like that, the plate was ruined. Fk.

I'll order another plate tomorrow. Fortunately, all my other work is just fine so I don't need to start over. Just drill and tap for 4 set screws, and trepan a new disk.

Insert big sigh here......
 
Susquatch said:
Another project suddenly and officially on hold.

I mounted my 4 jaw and then centered the degree plate in the collet. I centered it to a half thou. Why so precise? Well.... why not? Of note, 4 ears were more than adequate. The collet grips extremely well - maybe too well......

View attachment 54197

Then I cleaned up all the steel swarf to switch to aluminium. And then started trepanning the plate.

View attachment 54198

You can also see my mistake above. The chip on my compound is too big. Rookie mistake. Slow and steady is better. I was too anxious to start and finish a big project before @DavidR8 could knock off another two dozen. Just as i broke through the plate, it grabbed like a crocodile and just like that, the plate was ruined. Fk.

I'll order another plate tomorrow. Fortunately, all my other work is just fine so I don't need to start over. Just drill and tap for 4 set screws, and trepan a new disk.

Insert big sigh here......
Click to expand...
Screenshot_20230608_135035_Bitmoji.jpg
 
Susquatch said:
Another project suddenly and officially on hold.

I mounted my 4 jaw and then centered the degree plate in the collet. I centered it to a half thou. Why so precise? Well.... why not? Of note, 4 ears were more than adequate. The collet grips extremely well - maybe too well......

View attachment 54197

Then I cleaned up all the steel swarf to switch to aluminium. And then started trepanning the plate.

View attachment 54198

You can also see my mistake above. The chip on my compound is too big. Rookie mistake. Slow and steady is better. I was too anxious to start and finish a big project before @DavidR8 could knock off another two dozen. Just as i broke through the plate, it grabbed like a crocodile and just like that, the plate was ruined. Fk.

I'll order another plate tomorrow. Fortunately, all my other work is just fine so I don't need to start over. Just drill and tap for 4 set screws, and trepan a new disk.

Insert big sigh here......
Click to expand...
I’m at the ferry terminal so you have a few hours to get that sorted out John :)
 
If the center is waste, why couldn't you forego the collet and do it like how you made the collet, or do it how i showed previously, with pressure turning against the jaws?

If sticking with the collet arrangment, perhaps a wrap of thin tape might add some protection to the markings.
 
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