Gearwork Pegboard

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Mifga

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Feb 1, 2012, 12:25:26 PM2/1/12
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Hello!

I have been looking to contribute, and think I have found a way I can
be useful. I've generated a gearwork pegboard to allow folks to test
out their 3D printed gear trains. Many of you are already using Tony
Buser's snapfit tools (Pin Connector V2 etc) or related means of
mounting your gears -- this is a fast, simple way to lay-out a problem
flat on a board to make sure the travel you need is happening.

http://www.thingiverse.com/thing:16827

This is not a hugely sophisticated tool, but I'm going to make a few
snapfit tools so that you can mount any sort of 3D printed gear to the
board -- and perhaps use a shaft through the board to the other side
as a quick way to reverse direction of action.

Educators and students, at least, will probably find this pretty
useful.

I'll have a pair of these at MakerBot on Saturday for anyone who needs
one. Let me know if you know you need one so that I can run extras for
those who would like to have this at hand.

Thanks,
Matt

Tony Buser

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Feb 1, 2012, 12:42:09 PM2/1/12
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That's awesome, I was thinking of doing the same thing except using printed plates with pin connector holes that join up using dovetail joints.  Using a wooden backplane would save a lot of time and plastic.  :)

I was also thinking that using pinpegs instead of bearings should be smooth enough.  That along with spreading the gears of a clock out horizontally instead of stacking all the gears on long shafts would help prevent the gears from twisting and binding.
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Mathieu Glachant

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Feb 1, 2012, 12:46:13 PM2/1/12
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A flat clock would also look cool!

Matt Griffin

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Feb 1, 2012, 1:00:15 PM2/1/12
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I'd love a touch of feedback from folks who have simple gear trains they wanna peg up and test -- what sort of hardware/connectors would be helpful to you?
Thanks,
Matt
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Tony Buser

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Feb 1, 2012, 1:12:29 PM2/1/12
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I'm having trouble finding a picture of what I'm thinking, but it would probably look something like this:

http://www.datamancer.net/blog/images/reliquary-lid-650p.jpg

It would be big and the hour/min/second hands would be in different places, but I'm thinking it would be a lot easier to tune and get running.  As well as looking pretty cool.  :)

On Wed, Feb 1, 2012 at 12:46 PM, Mathieu Glachant <syv...@gmail.com> wrote:

Mathieu Glachant

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Feb 1, 2012, 1:16:59 PM2/1/12
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ruste...@prototribe.net

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Feb 1, 2012, 1:22:39 PM2/1/12
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Damn! I forgot how awesome those looked!

Alexander Schwartzberg

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Feb 1, 2012, 1:23:54 PM2/1/12
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Hi!
I'm working on a flat clock - I have most of the math/design worked
out but an overwhelming school schedule is keeping me from forging
ahead at full steam (but not from mixing metaphors apparently). If
this is something you're working on I would love to see (in no
particular order) :

A basic ('blank', if you will) peg-end to foster the creation of
derivatives that snap into the pegboard

A pointer/arrow to indicate position in the gear's rotation

Pegs with varying height and a modular cage system to accomodate
stacks/different heights of gears

Accommodation to make the board hang on a wall (i.e. hooks for string
and spacers for the back so the gears don't create friction with a
wall)

An easy way to daisy-chain two pegboards together for larger projects

A motor mount of some kind, either for a stepper, continuos servo, or
DC motor (geared or otherwise) if somebody wants a simple gear
prototyping board for something other than clockmaking, or if somebody
wants to make an electric geared clock

Some more abstract pegboard shapes (square, elipse...perhaps even
three dimensional - like a cube or hemisphere with a gentle curve)

I realize that some of these are asking a lot/unrealistic but there
are no bad ideas in brainstorming - hopefully something here inspires
you :D
I would love to help with this pegboard any way I can - let me know
how I can be of use!

-A

Mathieu Glachant

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Feb 1, 2012, 1:32:58 PM2/1/12
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I need to make an option to flip certain gears so that they reverse how the train stacks. Right now the clock builder script orients them all with the pinion facing the same side... With that mod, you could design a flat clock easily, with only two planes for the gears.

Of course, that only affects the assembled view in OpenSCAD. You can already use the script to generate the gears and assemble them however you wish in meatspace. :-)

Tony Buser

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Feb 1, 2012, 1:55:54 PM2/1/12
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Come to think of it, why not just use regular pegboard you can buy at a hardware store instead of laser cut pegboard?  Then you'd just need a generic printed part to mount to the pegboard using recessed screw that has one of my pinpeg holes in it.  Then a bunch of gears of various sizes with my pinpeg holes in them to attach to that generic part.  That would make it easy to lay out and prototype different gear ratios, configurations, escapements, etc in a flat horizontal plane.

Tony Buser

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Feb 1, 2012, 1:58:56 PM2/1/12
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Or just skip the generic part and make a special pin connector that has one side that slots securely into regular pegboard holes.  Maybe it's time I start actually participating in this project.  :)

Mathieu Glachant

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Feb 1, 2012, 2:00:35 PM2/1/12
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Makes sense to me, certainly for prototyping.

The clockbuilder script keeps all shaft-to-shaft distances equal, you'd just need to scale to fit the pegboard.

Mathieu Glachant

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Feb 1, 2012, 2:01:17 PM2/1/12
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Heck yeah! :-)


On Wednesday, February 1, 2012, Tony Buser <to...@makerbot.com> wrote:
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