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1:4 scale Dillon Aero M134D minigun

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A few months ago I upgraded my Ultimaker 2 with the Olsson block, allowing me to produce finer detail with the .25mm nozzle. As a test project I decided to do a 1/4 scale minigun. I found one on 3D Warehouse (model therefor courtesy of a chap that goes by the name of Spoonkiller, link here: https://3dwarehouse.sketchup.com/user.html?id=0015491875973132162600283 ).. The model however needs a fair amount of work to make it printable.. The material I'm using is Faberdashery's robot silver PLA.

Anyway, the work so far:

The main housing:




The clutch and delinker sprocket:





The rotor, with lightening holes as found on the titanium version.. This is the part that really started to pose some printing challenges.. That is until I started on the bolts and their guides:



Bolt guide clamp.. I had to print these, as well as the bolts and feed chute links, on a web with five others:


Printing the tiny parts separately would've resulted in less than optimal prints, parts falling over, too much heat concentrated on a small area.. So I added 0.3mm webs between the parts to keep the head moving and allow for the parts to keep cool and stable during printing..


I used the same principle for the bolts..


When rotated, the bolts follow the bolt track in the housing.. They're also installed like the real thing.

Firing position..


Retracted position..


Stay tuned for more!

Edited by Guest
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I think I've seen this on twitter or something a while ago. Doesn't it also move like an actual rattle gun? This is such an impressive print!

Is it part of a bigger model?


Thank you!

I put it on instagram and twitter ages ago, but was persuaded to share it with the community here..

The thing is meant to be a stand alone model which will eventually be perched on it's pintle mount as found on a Chinook or Blackhawk door mount.

Here's a video of the bolt and delinker turning together..


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I also want to experiment with a 0.25 nozzle,

can you tell anything about layer adhesion en printing times ?

The detail looks really sharp :)


I print everything at low speed and low temperature. Say inner wall at around 40 and outer at 18. Temperature is usually around 186 degrees and the bed set to 60. Layer adhesion seems fine, but these are small parts and fragile anyway. The only place where layer adhesion was a problem is with the barrels, where I set the infill too low.

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Man, that's AWSOME!!!!

How have you managed to get the parts modeled? I´m looking since month/years for  minigun or gatling plans to make a 3D model, but without success...


Sorry about the late reply, it's been a while since I've been here..

I may have mentioned it before, but the model was found on 3D Warehouse, made by user thespoonkiller. The model isn't 3D printable and able to function out of the box, as the parts need tweaking for tolerances, but otherwise it's all there:


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