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3D Printed Big Blast Triggers


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#1 Curly

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Posted 02 August 2016 - 01:10 PM

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War-tested design, fits in shell without any cuts. I use some silicon grease to lubricate all surfaces of the trigger, it hugs the shell more tightly than stock. You'll need to file or sand the side that has supports attached to it for a smooth surface, but after 5-10 minutes and some greasing it fits great and shows no signs of wear after a day of 30C use. It also does not seem to max out the draw of the tank's pin, so it shouldn't cause extra wear. Lacks the sex appeal of full aluminum, but is far cheaper. I printed them with the following settings in PLA on an Ultimaker 2:

 

Layer height: 0.2mm (much larger and they don't fit nicely)

Wall Thickness: 1.2mm (bigger is better)

Top/Bottom Thickness: 1mm (bigger is better)

Infill Density: 99% (Cura estimated several hours more for 100% infill, I don't expect it makes much difference)

Supports: Enabled, placed everywhere

 

nZ2OOrn.png

 

AEHln59.jpg

 

Can't seem to post anything but an STL file here, I'll try to get the PRT file added to the digital designs directory. PM me if you don't see it there.

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Edited by Curly, 02 August 2016 - 01:20 PM.

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#2 Gears

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Posted 02 August 2016 - 09:07 PM

Thank you so much for putting these together! I'll try and have a couple printed before Apoc this weekend!


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#3 DX-Robert

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Posted 03 August 2016 - 12:24 AM

How much has this really been stress tested?  I wouldn't recommend anyone use a 3D printed 4B trigger until they've put it through thousands of shots of testing in cold weather as well as warm.  I honestly don't think these will last a year.


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#4 Curly

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Posted 03 August 2016 - 02:06 PM

How much has this really been stress tested?  I wouldn't recommend anyone use a 3D printed 4B trigger until they've put it through thousands of shots of testing in cold weather as well as warm.  I honestly don't think these will last a year.

One full war in 30C heat. They're over 99% solid plastic, and 12mm thick in most structural areas. They're also like $4 in material, so even if they only last a season, that's still decent.


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