Step 5: The Motor Mount and Pistol Grip

I decided that the easiest way to construct the pistol grip was to cut up the old cordless drill with the Dremel. I marked out the section I wanted, dismantled the drill and reassembled the shell. I then cut through it with the Dremel and cleaned off the edges.

Whilst doing all this I realised that the 12V printer motor was exactly the same diameter and had the same locating holes as the drill motor which was knackered. The printer motor was around 10mm longer than the original, but where i had cut back the drill body this didn't matter. Using the original drill mount and fittings I installed the new motor and soldered some long leads to it. This should be able to make the motor mount if I am careful in fitting it to the main body.
You can see the old burnt out motor with it's gear attached in the very top of the first picture.

I will re-use the original drill trigger and electrical contacts for the minigun, and hopefully mount the battery pack into the feeder to hide it. That way I should (in theory) be able to recharge the batteries using the drill charger with some Heath Robinson adaptations.
I set the pistol grip aside for later.

One problem is the fact that the motor mount has been so butchered that it has nearly an entire side missing. I found an old stout cardboard tube of about the same diameter, and cut out a section big enough to fit the mount. This was coated in three coats of resin to strengthen it and then hot melted into place. This will be filled and sanded back and the whole thing painted to match.

To make the mounting yokes, I constructed a simple jig from an off cut of the cardboard tube, and off cut of the body pipe and two pieces of wood. These were tack sealed to my resin board using plasticine (nu-clay?) and then resin was poured into the mould. I made two of these yokes, cleaned them up with the Dremel and then glued them to the body.

I made a small aluminium extension for the motor shaft, then glued the motor mount to the body yokes. I did a quick test using a rubber band as the drive belt and it all worked well. I will need to find an old Hoover belt for the final assembly.
<p>Nice! I'm thinking of going as a battle mech this Halloween and this would be perfect for it! Thanks! </p>
<p>well we kinda had the same idea</p>
<p>i want to go as a military guy for holawen (how ever u spell that) and this would be the perfect gun so here are a few ?s how much did it cost and how long did u take to build it </p><p>thx, that random guy on the internet</p>
<p>looks awesome, Im planning on making one of these for the Call of Duty Cosplay i do &amp; was wondering if u had a list of all the supplies and pvc deminsions u used?</p>
old game joystick would work, too...
My minigun is based off the much larger M61A2 Vulcan so the barrels a little longer than yours. I trying to button this project up but the 20v drill motor isn't strong enough to run the gun while inside the body. It can run it while outside the body. But once its bearing any kind of weight it doesn't want to turn. My current set up is with the drill motor mounted in the back of the body tube with one brace at the very front. The shaft of the barrels goes through the front brace and right to the motor. Basically there is the motor and one brace. Do you think the problem is lack of braces, bearings, and the fact the motor is supporting the weight of the barrels? Do you think I can mount the motor in the ammo feed tube instead? What and how would I use as a drive belt? <br><br>Your work is top-notch and I was just hoping you could allow me some insight into this problem. Thanks.
I think that trying to supportvthe barrels with the motor is your problem.<br>I used the centre shaft of the barrels and ran them right through the body supported by 6 bearings, three at the front and three at the back. The shaft is held in place with an 'O' ring at the front and the back.<br><br>I mounted my motor in the tube that would have been the real motor housing and used a Hover belt as a drive belt from the motor, round the centre shaft in the very front of the body. That way the only strain on teh motor is rotational and the bearings take all the strain.
Thanks so much for the quick reply and idea. It will really help me a lot!
How long are the tubes for the barrel?
I did a best 'guesstimate' from some drawing I found on the net.
I've been thinking about a ped mounted machine gun for the bed of my pickup for a while, I was really thinking about a 50cal but this would be over the top.. great looking gat and a really well done &quot;ible&quot; thank you for sharing !
Thanks for the nice cpomments.
Very nice! So realistic looking!
It's amazing how you make sure realistic stuff out of basic ingredients.<br>
I am Heavy Weapons Guy and this is my weapon

About This Instructable




Bio: Untidy, disorganised and a bit silly. I am a photographer, artist, body artist, sculptor, prosthetic maker, model engineer, and general idiot who likes making stuff ... More »
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