How to make quarter rounds and to make a diagonal cut with common tools?

[DerbyDad03]

re: > >C. Use a lathe

Sure it will. You just have to make sure you lift your turning tools at the correct times.

[Doug Miller]

OK, wise guy, back atcha -- tell me how you're going to mount that between centers to get the 3" radius the OP wanted.

[Lew Hodgett]

Consider it a "Cast thy bread upon the water" moment for them.

Buy a LOT of Finnish birch from them, don't even think about shopping it.

Lew

[Lew Hodgett]

It is not impossible. Like Derby said, you just have to synchronize the in and out feed with the rotation. Effecting this is left as an exercise for the reader.

Think cam and a follower.

Lew

[CW]

Block on each end large enough to take the centers for the correct offset. I thought that was obvious but apaerently not.

[Doug Miller]

The vibration from being so far off balance would tear it off those blocks in a heartbeat.

[RicodJour]

Is there some rule that only the workpiece can be mounted between the blocks? It's possible to add some deadwood/weight to counterbalance the workpiece, no?

nothing to prevent using the concepts of that fack-tree made eccentric chuck and making your own. The counterweights can be attached to the end mounting blocks, they don't have to be full length.

Howza bout gluing four blanks together and turning four quarter rounds at one time? That doesn't sound impossible, is it?

Let's keep the bar set for the word impossible at its original "not possible" setting. It makes communication easier.

R

[Lew Hodgett]

----------------------------------- The center of rotation has to be centered on the lathe, but that doesn't mean the workpiece has to have its center centered. There are a number of ways to accomplish that as well.

------------------------------------

Be nice.

Using some basic engineering to make your point may be taking unfair advantage of the situation.

Lew

[dadiOH]

Afix 3"x6" or thereabouts boards to ends of 3x3. Mount on lathe at board centers.

[DerbyDad03]

...and all I was trying to do was to add a little humor to the thread...

[RicodJour]

I know. And all I was trying to do was to point out "impossible" isn't in this situation...well, that and have a little fun poking fun. ;)

R

[Doug Miller]

And make sure you're not standing in front of it when you turn the lathe on, 'cause it's coming off.

[dadiOH]

Your cup is always half empty, isn't it?

The lathe could be run *very* slowly or - as explained by others - counterweighted. It need not be run at all if one mounted a router so it could be slid along the length of the stock, the stock being rotated manually after each pass. And - anticipating your next objection - yes, the stock would need to be held rigidly while routing.

[RicodJour]

I think the cup has a crack in it. ;)

In most ways the router would be the safest and provide the smoothest result without handwork. The OP mentioned a tablesaw and bandsaw, and that's what people limited their replies to. It would seem odd to me if the OP had those tools and not a router.

R

[Stuart]

Just stick 4 of them together to make a 6x6 block and turn that, then separate

Easy-peasy, nothing out of balance, you produce four at a time and all exactly the same radius.

[Stuart]

Possibly. I seem to recall this happening once before when we had the clock change but I can't remember what the fix was.

The clock on screen is displaying the time correctly.

[Steve Turner]

Looks like something isn't right with the clock on your system. Your posts are coming in with a time stamp of an hour older than when you posted them.

[Steve Turner]

Well in that case it was a Windows machine exhibiting a bug in its handling of the automatic adjustment for daylight savings time. It doesn't look like you're running Windows to me, so it's probably a different issue.

[smandel]

This is how I would try - caveat emptor!

First, drill a hole in the exact center of the 3x3 at both ends. Scribe a circle around the center, and remove as much waste as you can with the bandsaw. Build a support so that the wood sits like a barbecue spit, suspended from the centers. Mount over a router table, take very fine passes, spinning the wood....

shelly

[Lew Hodgett]

Which is how the Sears Router-Crafter operates.

BTW, no need for bandsaw.

Lew