using standard servos with LEGO parts?

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Joe Strout's Avatar (by Gravatar)Joe Strout posted on
October 6, 2006, 10:33 am
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I've found that -- not surprisingly -- using a standard servo with LEGO
parts is annoyingly troublesome.  The mounting holes and case size don't
match up neatly with LEGO hole/stud spacing.

I can imagine making an adapter part or two, perhaps as easily as
drilling appropriate holes in a piece of plastic.  But I'm wondering if
anyone else has already come up with a clever solution to this problem.  
A quick Google search turned up only one item, using a nonstandard
(smaller) servo.

Any pointers appreciated!

Thanks,
- Joe

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Gordon McComb's Avatar (by Gravatar)Gordon McComb posted on
October 6, 2006, 11:01 am
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Re: using standard servos with LEGO parts?


One of the first I did was a LEGO-compatible servo mount for standard
servos.

http://www.budgetrobotics.com/shop/?shop=1&cat 2

It's not "clever" but it does work!

-- Gordon

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Joe Strout's Avatar (by Gravatar)Joe Strout posted on
October 6, 2006, 11:18 am
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Re: using standard servos with LEGO parts?



That's cool!  I had seen that before, but forgotten about it.

Does the position of the technic beam work out such that, when you build
a "box" or frame enclosing the servo, you can arrange for a technic pin
or hole directly opposite the servo horn, so as to make a joint?

Thanks,
- Joe

Gordon McComb's Avatar (by Gravatar)Gordon McComb posted on
October 6, 2006, 2:03 pm
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Re: using standard servos with LEGO parts?


I wouldn't know. Maybe you'll get lucky. All I did was put the two
mounting holes a LEGO-happy distance apart. There's probably a multitude
of ways people may want to use it. At the time I envisioned the mounts
for continuous rotation servos.

-- Gordon

Joe Strout's Avatar (by Gravatar)Joe Strout posted on
October 6, 2006, 3:34 pm
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Re: using standard servos with LEGO parts?



OK, probably not, then.  :)  But it's still a cool part.

Thanks,
- Joe

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Jason S. Mantor's Avatar (by Gravatar)Jason S. Mantor posted on
October 6, 2006, 8:40 pm
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Re: using standard servos with LEGO parts?

Gordon,
    I tried to contact you a while back via the email on the contact page
asking if you had any cad drawings of this servo mount, but didn't hear
back : (  I'd like to import it or recreate in LDRAW so that people can
use it easily in their Lego creations.  So, got any cad or dimensional
drawings I can work from ?
    Thanks
    -JSM

Gordon McComb wrote:



Gordon McComb's Avatar (by Gravatar)Gordon McComb posted on
October 7, 2006, 1:57 am
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Re: using standard servos with LEGO parts?


Heavy spam filters. Sorry.

My CAD drawings end up going to CAM files, and they have offsets for a
router with a 1/8" bit (plus a slight adjustment for
expansion/contraction caused by heat). Because of this they are not
dimensionally meaningful outside my CAD/CAM setup. You'd get more
accuracy measuring one of the brackets using an old wooden yardstick!
<g>

-- Gordon

Jason S. Mantor's Avatar (by Gravatar)Jason S. Mantor posted on
October 7, 2006, 9:18 pm
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Re: using standard servos with LEGO parts?



OK, but I think I'll use my el cheapo digital calipers : )

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