LumberJocks Woodworking Forum banner

Project Information

I made a direct drive version of this and it was ok except you can dispense all 6 marbles in less than 6 seconds…..which is very fast.

If I use a worm gear drive, I can slow it down so it takes longer to dispense all 6 marbles. About 4 seconds per marble would be about right, which is 15 RPM. Since kids can crank up to 100 RPM, the worm gear needs a speed reduction ration of 100/15 of 6.7.

Since the worm gear speed reduction ratio is determined by the number of teeth on the worm gear, using 7 or 8 teeth should be ok….....I chose to go with 8 teeth on the spur gear. It takes about 29 sec on the actual model, cranking it at 100 RPM, to dispense all 6 marbles.

The model is made of maple parts, except the worm gear and crank handle are made from a 1.25" diameter birch dowel. I used water based red dye on the worm gear and crank handle.

You can use this link to watch a Youtube video of this model in action.

For more details, see my woodworking web site.

I think the grand-kids will have fun with this one.

Gallery

Comments

· Registered
Joined
·
5,101 Posts
Very neat project.
 

· Registered
Joined
·
1,434 Posts
These things you make are awesome
 

· Registered
Joined
·
949 Posts
Cool little marble dispenser machine!
 

· Registered
Joined
·
2,671 Posts
Just have to love all the contraptions you have built and shown us.
Keep up the great work!!!
 

· Registered
Joined
·
969 Posts
Fun stuff - and I really like your videos!

Mike
 

· Registered
Joined
·
0 Posts
Fun stuff - and I really like your videos!

Mike

- mikeacg
Thanks!

Recently I switched to using my Samsung S8 cell phone to make my videos, versus my 2006 Canon Powershot A610, and the cell phone makes sharper, crisper videos…......plus I added some lighting on this one which helped a lot.

You can use this link to watch more of my videos about the wood toys I have made.

thanks again
 
Top