An experimental conga drum - Router Forums
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post #1 of 105 (permalink) Old 12-31-2015, 02:27 AM Thread Starter
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Default An experimental conga drum

After having been suitably harassed in the introductions, I think it's time I got on with asking the question that I came here for.

For some time now, I have been searching the web to see if I could find out whether or not it is possible to make a segmented conga drum. Thus far my searching has come up with a grand total of zilch.

I have found plenty of snare and toms made with segmented construction, but that's all.

So I tried forging ahead without the benefit of finding the mistakes that others have made, and decided that I would need to make my own silly mistakes.

The pic that I am somewhat embarrassedly (is that a real word?) posting, shows what I have glued up over the past several days. For the numerically inclined among you, there are 360 pieces of wood in that thing.

Now, there's no way that one could turn this on a lathe, as it would explode into a magnificent pile of firewood immediately, of that I am sure.

Ergo, we need some sort of jig to use with a router.

I'm all ears for your best suggestions.
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post #2 of 105 (permalink) Old 12-31-2015, 02:36 AM
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Hey! I love it the way it is!!


Would something like this work for you?
Industrial Wood-Shaping Cutter Kit - Lee Valley Tools
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post #3 of 105 (permalink) Old 12-31-2015, 02:51 AM
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all words are good...
to get really good... please learn typonese...

harassment....
doubt it...
but if you wold like some that can be arranged...

make a template of the shape/curvature you want...
electric plane it to rough shape/profile...
finish w/ a spoke shave, flex plane and an ROS...
reference your template often..

next time don't include so much waste material in your project...
build a layer..
mark out the circumference....
trim w/ your jigsaw set to an angle that meets the need...
repeat incrementally...

electric plane.. PL1682 3-1/4" Planer | Bosch Power Tools
spoke shave... Veritas® Large Spokeshave - Lee Valley Tools
flex plane... It?s Just Cool: Flexible Sole Plane | Toolmonger
jigsaw.. JS572EL 7.2A Top-Handle Jig Saw Kit | Bosch Power Tools

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #4 of 105 (permalink) Old 12-31-2015, 02:53 AM
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Quote:
Originally Posted by DaninVan View Post
Hey! I love it the way it is!!


Would something like this work for you?
Industrial Wood-Shaping Cutter Kit - Lee Valley Tools
me too and we shouldn't tell him that...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #5 of 105 (permalink) Old 12-31-2015, 02:57 AM Thread Starter
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Dan, I have something very similar to this. Having been a Lee Valley customer since 1977, I think I must have got my cutter from them at least 20 years ago.

It's different from the one you linked to...it's the type with a mini chainsaw chain. Gotta tell you, it's a vicious cutter.

I have given thought to trying some 36 grit on one of my R/O sanders, but I think some sort of router jig will be needed to do an even job.

I can see possibly trying one of these grinder type wheels to get rid of some of the bulk, but then it needs to be got round after that.

Of course, my other alternative would be to build a conga using one of the established methods.
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post #6 of 105 (permalink) Old 12-31-2015, 03:07 AM Thread Starter
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Stick, thanks for enlightening me as to the lingo.

Typonese it is, I always used "Chinglish" but I shall correct my ways forthwith.

I have the tools you list with the exception of the flex plane. Yes, I agree it's pretty cool, also pricey if my feeble memory serves me.

The method you describe would not yield what I'm looking for. Just like the rest of you guys, I just have to be different. But I do know what you mean.
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post #7 of 105 (permalink) Old 12-31-2015, 03:18 AM Thread Starter
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harassment....
doubt it...
but if you wold like some that can be arranged...

Stick, do you offer this service for everyone, or is it just a special for lil' old me?

Incidentally, all the stock for this was a freebie, and I have plenty more where that came from. Better than 95% of the wood is clear and extremely dry.

Perhaps I should reconsider and make an attempt to try your method. I have seen it done before, just never tried it myself.
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post #8 of 105 (permalink) Old 12-31-2015, 03:31 AM
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Quote:
Originally Posted by cocobolo1 View Post
harassment....
doubt it...
but if you wold like some that can be arranged...

Stick, do you offer this service for everyone, or is it just a special for lil' old me?

Incidentally, all the stock for this was a freebie, and I have plenty more where that came from. Better than 95% of the wood is clear and extremely dry.

Perhaps I should reconsider and make an attempt to try your method. I have seen it done before, just never tried it myself.
harassment is equal opportunity...
open to all...

free stock is the best kind...
what is it...
can I hazard a guess at VGF..

one or two layups should tell you if it would work...
is the inside reverse of the exterior???..
be nice to leave the one shwn as is...

I like your approach..

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #9 of 105 (permalink) Old 12-31-2015, 05:45 AM
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The only way I see is that you need to make a frame that it would spin in, you would need end plates on the drum to hold each end centrally and a post at each end to support it and I would turn the drum by hand, the post needs bearings at each end for the spin, looking at the photo then it looks like the high point to the low point is over an inch but under two inches, that could have been reduced if there were more segments in each ring, either way that is too much to cut away in one pass, as the rotation would be slow then each pass could not have a deeper cut than a 1/4 inch and a 1/4 inch along the arch, that could be OK if the rotation was slow at the start the cut would be stop/start until it was round, I would make an arch that was attached to the top of each post and the arch would have to be the shape you want the router to cut the drum to and you need to be able to lower the arch at each end to get a deeper cut, the router would travel on a sled along the arch. one rotation at a time, do one full rotation before the router sled moved along the arch to do the next circular cut, I would use a planing cutter with a flat bottom and the bottom of the cutter will have to be held square with the cut, as the difference between the high and the low points is so much then you will have to do many rotations to get the drum finished, I would do the final pass as only an 1/8th of an inch, this can be done but you will need a big Router lathe, see my Router Lathe post for what the beam and posts needs to look like, I am making mine so well as I will keep it for years and years and use it for many items but you lathe does have to be strong to support the arch/sled but I would only make it as well as you need it to be so how many drums will you make? what you need to build is not that different to what I am making, my lathe has a flat top, yours will have a pair of arched top rails that the Router Sled will move along. best of luck. N

http://www.routerforums.com/jigs-fix...ter-lathe.html
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Last edited by neville9999; 12-31-2015 at 05:57 AM.
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post #10 of 105 (permalink) Old 12-31-2015, 09:13 AM
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Keith,
I agree with Neville in that you would have to make a frame similar to a lathe so it could be rotated slowly by hand, either by crank or a wheel attached the end. My first thought was to attach the frame so it could be hung as a pendulum over a tablesaw to rough it to shape by spinning and swinging, but that would take some serious stabilizing. If you started with a frame that it could rotate on, and made a curved pair of rails for a router to follow, then when it's roughed down you might be able to adapt the curved rails to hold a belt sander or disk sander to further refine the finish. Nice challenge!
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