Thread: Rotary Table questons

I'll give it a go. If it doesn't work I don't have to use it.
Machining the camloc taper. My idea ATM is to rough the face down, turn the taper down until the chuck it loose on the taper then machine the face down until everything fits. Rather than machining the face then trying to get the taper spot on taking tiny cuts.

Here the a picture of the way covers now, I've added a vacuum cleaner which as far as I can tell stop almost all the fine dust.

Stuart

PeteF,
The book I read said with felt wipers to take them off. Mine are plastic. But I agree with you, if you get to out of shape about wearing the machine out you're not going to use it and then it may as well be in the tip anyway.

To add a little story about wipers, I was cleaning the felt wipers off my shaper and was wondering if they was clean enough yet, then I picked one up with a magnet. I think they might need some more cleaning yet hehe

Stuart

It doesn't matter which way you go about it, remember to under cut between the taper and the face when your finished.

You had better not let your wife see that job, or you will be wrapping the roast and doing the vacuuming.lol

Dave

Originally Posted by Stustoys

PeteF,

To add a little story about wipers, I was cleaning the felt wipers off my shaper and was wondering if they was clean enough yet, then I picked one up with a magnet. I think they might need some more cleaning yet hehe

Stuart

Its that new magnetic felt, designed for the job.

Dave

Originally Posted by Stustoys

PeteF,
The book I read said with felt wipers to take them off. Mine are plastic

The book said to take the wipers off before machining CI? That seems bizarre to me. As I said, I did quite a lot of machining of this particular plate, and no CI got past the wipers, so I don't know why they would suggest that. I was really curious so had a good look at what got where. However in lieu of taking the saddle off, I would definitely take the wipers off AFTER machining and give them a really good clean. Mind you, as mentioned, my wipers were new and were functioning as designed, but the worst that one could expect if they were stuffed is that some CI would get past them ... in which case you're no worse off than if they weren't there I can't see the logic in what the book was saying, did they say why?

Pete

PeteF,
I think the same book wanted you to wipe all the oil off the ways before you started. I'll see if I can find which book it was late today.

Dave,
I have some more felt I might just make some new ones
Isn't the amount you machine off the taper to move the chuck back 0.1mm way less that 0.1mm?

Stuart

Originally Posted by Stustoys

PeteF,
I think the same book wanted you to wipe all the oil off the ways before you started. I'll see if I can find which book it was late today.

Yeah cheers for that, I'm keen to know as I could have a copy here too. From what you've said I can see what they're aiming for but I'm afraid I can't follow their logic. So a lathe that only ever machined CI would never have its ways lubed! Wonder how long that would last! I think what you're doing makes the best sense to me; try to prevent the CI swarf getting in to places as best you can. Once you're done with it, get all you can back out again. Otherwise it's still just a lathe, and the same metal "bits" are still rubbing on the other metal bits and still need lubrication!

Pete

For every 2 thou (0.0508 diameter) off the taper, you will need to move the the face back 0.0081 thou (0.2057mm)
The angle is 7.125 deg
The large end of the taper should be 2.500 thou (63.5mm) and it should stand out 0.4375 thou (11.11mm) off the face.

Dave

I've had a quick look Pete, can't find it, I'll look in a few others later.(sure hope I'm not making it up)

Thanks Dave. Should be easier to get a better fit machining the face second then

Have just cut the extra 15mm in the bandsaw, about 8 minutes a cut, best money I ever spent.

Stuart

Your finish on your piece earlier in the 3 jaw looked a little rough,what were the parameters.

Originally Posted by Stustoys

I've had a quick look Pete, can't find it, I'll look in a few others later.(sure hope I'm not making it up)

Stuart

Don't go to any trouble Stuart, I'm sure you're not dreaming it up and I can see what they're getting at. However it personally won't change my own personal opinion and that's to cover then clean, otherwise operate the lathe normally. Of course keep in mind that's not based on years of experience; I sure as heck haven't written a book and undoubtedly never will, and is nothing more than my own humble opinion.

Pete

pc,
You could be right , I think it looks worse than it is though. I can get a better looking finish feeding faster but it feels worse. I'll go get my numbers, but I'm pretty sure you wont like them
Happy to try something else though.

I've set the compound to the camloc, its within a couple of 10ths.

Stuart

Ok here goes, 640rpm, and feeding as slow as it goes. 0.017mm cross and 0.079mm long.

Stuart

What tool were you using Stuart? I finished up switching to HSS and had much better results than the carbide I started with.

Pete