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Forum topic by gfadvm posted 888 days ago 1912 views 7 times favorited 27 replies Add to Favorites Watch
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gfadvm

10438 posts in 1277 days


888 days ago

A lady asked if I could make one of these toys for her son. I have been fighting it all afternoon. She had this picture but no plans or dimensions. I took a pic of the scrapwood prototype I worked on today. Does anyone have plans / dimensions for this? I would like to be smarter before I start wrecking nice woods. Thanks, I hate to admit to her that I can’t do this (plus I would like to make one for my granddaughter).

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm


27 replies so far

View Lifesaver2000's profile

Lifesaver2000

504 posts in 1699 days


#1 posted 888 days ago

I had one of these when I was a kid back in the 70’s. It was called a “Do Nothing” at the time.

Here are a couple links that might help:

http://en.wikipedia.org/wiki/Trammel_of_Archimedes

http://www.woodenuknow.com/donothingmachines.html

Good luck.

View Danpaddles's profile

Danpaddles

532 posts in 899 days


#2 posted 888 days ago

smoke grinder. Got a dovetail bit? s’all you need. well, that and a saw. and some wood.

-- Dan V. in Indy

View grizzman's profile

grizzman

6715 posts in 1890 days


#3 posted 888 days ago

i just looked at the wiki site of this…LOL

-- GRIZZMAN ...[''''']

View LittlePaw's profile

LittlePaw

1571 posts in 1665 days


#4 posted 888 days ago

Looking at it, it sure doesn’t look all that hard to make, does it?. Maybe I’m wrong, but I after cutting the 90 degree grooves, the 2 pcs of sliders and the crank handle, I’d start by attaching one pc of wood centered in the cross section and on the end of the crank.
Then slide the other pc of wood about half way out one track, put temporary pin through the handle and into the 2nd pc. Then gently turn the crank and see if it would clear each other and go all the way around, If not, just adjust where the pin is located until it would! That’s my best guess, Doc. Do let me know how it turn out.

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View Chipy's profile

Chipy

374 posts in 1180 days


#5 posted 888 days ago

Just a funny side note to you Trammel of Archimedes, Woodsmith(vol 34/no.199) magazine used this same principal to create a arc to create a template for a Demilune table.Anyways I think you could cut all thees parts in your table saw it look like a 45 or 30 degree angle for the slot parts.

View xwingace's profile

xwingace

204 posts in 1175 days


#6 posted 888 days ago

That thing is awesome!

-- I'm not as good as I once was, but I'm as good once as I ever was.

View Elizabeth's profile

Elizabeth

790 posts in 1730 days


#7 posted 888 days ago

Thanks for posting this! I had one of these as a kid and would love to make one, but I didn’t even have a picture, let alone a name.

I think mine had circular routed channels and the two moving pieces were shaped like tic-tacs.

View Roger's profile

Roger

13976 posts in 1391 days


#8 posted 888 days ago

all’s I can think about is “the wheels on the bus go round-n-round, round-n-round, round-n-round” lol that is kool tho. I’ve never seen one, but, I could see where it would work maybe in some wood automation. thnx for the links, link posters

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

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bondogaposis

2419 posts in 938 days


#9 posted 888 days ago

I’ve seen those, I’ve heard called a BS grinder.

-- Bondo Gaposis

View Charles Maxwell's profile

Charles Maxwell

936 posts in 2394 days


#10 posted 888 days ago

View ShopTinker's profile

ShopTinker

872 posts in 1355 days


#11 posted 888 days ago

Just looking at the pictures I think you need to move your center bolt down towards the handle end. I’m guessing about 1/2 an inch.

Let us know when you get it figured out so we can all make one..

There will be an onslaught of Lumber Jock B.S.ers cranking out BS Grinders.

-- Dan - Valparaiso, Indiana, "A smart man changes his mind, a fool never does."

View gfadvm's profile

gfadvm

10438 posts in 1277 days


#12 posted 888 days ago

OK guys, I have the pine nailed together prototype working smoothly (wax helped a lot!). It looks to me that a rabbited design would work better as the dovetails bind easily if the handle is not held perfectly flat and parallel to the device. What do you guys think? The first link showed a plywood version that was not dovetailed but this lady wants “fancy wood”.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Joe Lyddon's profile

Joe Lyddon

7599 posts in 2639 days


#13 posted 888 days ago

I was making six of them when I had my Router accident…
... cutting the internal sliding dovetails…
After the accident, went to the table saw to do it… was a lot easier too!

Fun lil project…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View LittlePaw's profile

LittlePaw

1571 posts in 1665 days


#14 posted 888 days ago

If it works, that’s all that matters, isn’t it? Now u can duplicate it with any fancy wood! I knew u could do it, Andy!

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View gfadvm's profile

gfadvm

10438 posts in 1277 days


#15 posted 888 days ago

Hey Paul, It only works because I repositioned the parts with 97 brad nails and sanded a lot of tight spots! I’m trying to avoid this ‘tweaking’ with the fancy wood. No one voted against it so tomorrow I’ll try rabbits in scrap rather than the dovetail configuration. Also it appears some of these have a ‘handle’ on the underside???

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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