Harmonograph part 1

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Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:11 am

When I visit a children’s museum it’s fun to see which activities have the longest lines. The Harmonograph is always popular.
I wanted to make a version of this device in order to draw people to my display at craft sales.
This is to be for children to use while I sell my products to their parents.
This is the first part of a small series of steps I took to make a Harmonograph.
This is what a Harmonograph can draw by using the motion from two pendulums, and step one of my project, the table top:
Bob
Step 2 is coming right up.
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11.jpg
-2.jpg
-1.jpg
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:14 am

Step 2
The gimbal supports[/attachment]
1.JPG
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2.JPG
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:18 am

part 3
The gimbal ring drilling fixture:
2.1.jpg
2.2.jpg
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:20 am

The Gimbal top and gimbal assembly:
3.JPG
4.jpg
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:22 am

The platten to support the drawing paper:
5.JPG
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:25 am

Harmonograph pendulum weights:
Before adding lead and sealing it with epoxy.
Then installed.
6.jpg
6.1.jpg
6.2.jpg
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:27 am

The Pen support.
7.jpg
8.jpg
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:30 am

The finished assembly and drawing example.
This thing works!
I can't wait for the next craft fair.
9.jpg
10.jpg

Bob
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Re: Harmonograph part 1

Postby PaulRowntree » Sat Oct 18, 2014 12:42 am

Bob, you are a genius. Is the pen spring loaded?
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Re: Harmonograph part 1

Postby ozymax » Sat Oct 18, 2014 12:43 am

Bob.
I had never heard of a Harmonograph before now.
That is very cool and a nice design.
I think you'll have just as many parents playing with it and you'll be taking orders for them.
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:55 am

PaulRowntree wrote:Bob, you are a genius. Is the pen spring loaded?

"Genius" is probably stretching it a little. But thanks.
The pen is gravity loaded.
Bob
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 12:56 am

ozymax wrote:Bob.
I had never heard of a Harmonograph before now.
That is very cool and a nice design.
I think you'll have just as many parents playing with it and you'll be taking orders for them.

I hope it's the bait as I hook them with my products.
Thanks,
Bob
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Re: Harmonograph part 1

Postby martin54 » Sat Oct 18, 2014 2:15 am

Looks great, can see it attracting people, so lets hope that leads to sales for you. I'd never heard of a harmonograph either, well not strictly speaking true, I knew of them but didn't have a clue what they were called, now I know so thanks Bob.

So did you manufacture all the bits yourself or have you had to buy some of the parts??

Looks like the spell checker has never heard of one either :lol: :lol: :lol:
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Re: Harmonograph part 1

Postby Bob Jr » Sat Oct 18, 2014 2:21 am

Thanks Martin,
All parts were designed using VCarve Pro, and machined on my Shark. Some were Delrin, others were HDPE. I had no special reasons for the types of plastic I chose. It was just what I had in the shop.
Bob
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Re: Harmonograph part 1

Postby zeeway » Sat Oct 18, 2014 11:49 am

Weird and wonderful. Never know what we will learn on this site. Thanks, Bob.

Angie
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