Step 11: Modify a servo

I chose to use a servo because they are relatively cheap and include a gearbox which gives them a lot of torque and limits their top speed.  You'll have to modify a servo to use it as a drive motor.  The Instructible below gives step by step instructions for modifying a servo.


TL;DR: rip out all the electronics besides the motor, attach leads directly to the motor, cut off the stop tab on the big gear.

I blew a couple servos when working on the gun, mainly by testing to see how much power they could handle.  18v is the danger zone, 25v is a burnt up servo.  12v works pretty reliably and spins the barrel at a decent speed.
<p>Can I buy one from you? My friend wants to cosplay as the Heavy, and I would like to help her out. :)</p>
<p>For a free Steam gift go to http://getsteamgifts.com/ I got my Steam Gift Card there!</p>
<p>Free Steam games: http://getsteamgifts.com/ 32793 people already got their gift cards!</p>
<p>There is a free Steam gift card giveaway at http://getsteamgifts.com/ Works for all countries!</p>
<p>Free Steam games: http://getsteamgifts.com/ Works for all countries!</p>
<p>Thank you for inspiring me! I'm building my own Sasha, now.</p><p>I'm 3D modeling most of the parts, and I've got just about all the barrel components done. She's coming along beautifully. I'm going to do a test fit to verify motor operation (and lights... yes, lights). Then I'm on to other parts of the build.</p><p>I plan to have it done no later than May (for Phoenix Comicon 2014).</p><p>Thanks again for the inspirational Instructable. :)</p>
Okay on the barrel what is the front housing made out of? It looks like big piece of PVC pipe but you do not state what it is.
So i herd u liek maxez.
what does modge podge do to the foam, is it like a detail filler?
The primary reason for it here is to prevent the spray paint from melting the foam. Bondo is a much better detail filler since you can build it up and sand it smooth. Modge Podge is basically white glue mixed with water so it can fill details about as well as latex paint.
Is it possible to make this without some the machines (i.e. CNC, saws, etc.)? I, sadly, do not have access to much of them.
what kind of foam did you use?
This is just pure win :D, good job.
Congratulations on being a finalist in the Halloween contest!!! Can&rsquo;t wait to see if you win! Good luck!
Awesomeeeee! Reminds me of this <a href="http://www.dotpedia.com/creation/view/2058" rel="nofollow">TF2 sticky bomb</a> I found. But yours is way more &quot;functional&quot; lol.
nice <br>
I can has Maxes?
pretty nice looking. <br>I want one
Awesome tut! Just fyi, I posted to it on my site, www.propfreaks.com. <br> <br>Thanks for the great effort! <br> <br>-@PropFreaks
TF2 is my favorite game, so mad-ass props on this build. <br> <br> <br>But.... <br> <br>Am I the only one who now wants to see Heavy in a midriff shirt in-game? <br> <br>[p.s. you should totally send this to Valve, I bet they will put it on the TF blog]
On a side note, I love the at, where'd you get it?? xD
I made it :3
That is awesome, do you think you are going to post how to make it someday?? :3
Of course! I started to take pictures while making it, but then got lazy, and stoped. So I have to remake it and actually take pictures this time. ^_^;
That would be awesome, I did the same thing when I made a pair of swimming trunks last year, I still made the trunks, but next time I make a new pair, I need to use different material. These retain too much water.xD
WOW! That is definitely the coolest roll of toilet paper ever seen! Lovin' it! &acirc;™&yen;
Sasha is awesome, kudos to you my friend. This is a job well done. :)
Great job! It's nice that this version doesn't cost $400,000 to fire for 12 seconds. <br> <br>I mashed 'Vote' several times. Hope that helps!
Well done, such awesome pictures!<br /> <br /><br /> <br />Wait...no <em>sandvich</em>?
it spins!

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