Gallery, Projects and General > The Design Shop
Second post and already I need help
ed in cny:
Hello guys, I'm stuck on a project and need some help. I'm making a small hand crank organ and have made an error that I hope I can fix with some help. I made an offset from the plans to accommodate the pipes in a different layout. I though I had made the corrections to everything but as it goes I did not. What has happened is that this organ pumps the bellows off the crank when the handle is turned. It also drives the music take up roll. The connection from the crank to the bellows is to be vertical to the crank. However in my error I adjusted one end of the bellows on the wrong end there by offsetting vertical 2". I now need to drive the bellows from the offset and still drive the music from the original location. I am thinking of putting a straight shaft in the original location to supply the music. It would also supply the crank for the bellows by gearing them to each other. A 1 to 1 would be the ratio that I would need to maintain. The distance from centers of the shafts is 2" so I'm thinking of a 2" OD x .3125 bore spur gear. Here's where I need the help, I'm not sure of just what I need and where to get it. I can post pictures of the organ and help describe things as best that I can but I'm stuck right now. Brass, plastic or what ever at this point will help. I just need them to be low noise. Any ideas? Any help?
Here is someone elses organ and where I am working is to the left in the picture. If you add two more inches to the left of that crank that would give you an idea where I'm working.
BillTodd:
I'm having difficulty in imagining what it should be like.
Could you do a rough drawing of how the crank connects to the bellows and what drives what.
Is your problem caused by the crank rod connections or the gearing of the crank to the roll feed or ???
Looks an interesting project :)
Bill
Brass_Machine:
Hey Ed...
Not sure exactly what you need... I am also having difficulty visualizing it.
Making a HUGE guess... instead of using gears, you could always use pulleys and belts.
Mcmaster has acetal ones....
ed in cny:
Guys thanks for the responces. I can get something drawn up and post it. It will make more sense.
PTsideshow:
Your best bet would be belt and pulley from the point that will work best the belts can be angled any way they will fit. It is not uncommon for the belt to travel around something in the center of its two sides. As long as there is room to place a new belt on if needed with out to much trouble. :thumbup:
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