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Meaker VI

Member Since 18 Nov 2005
Offline Last Active Nov 03 2019 10:47 PM

Posts I've Made

In Topic: Upgrading Spring/Brass Barrel

03 November 2019 - 10:45 PM

Might be too short of a standard barrel; I could see the stock spring delivering pressure slowly enough that the dart gets more power than a heavier spring slamming the PH home before pressure developed behind the dart. That's a pretty out-there explanation though.

In Topic: Cyberpunk 2077 Kang Tao 3D Printed Nerf Gun

03 November 2019 - 10:43 PM


Thank you!


I haven't looked into tree supports yet. The reason I don't think tree supports is useful for this project is that there are a lot of larger, flat horizontal surfaces to support. Tree supports I thought were good for small overhang features, which is rare in this project, surprisingly. I do a lot of bridging instead.


When creating manual supports you may notice in the above pictures there is a gap intentionally left around the supports so that removal does not result in damaging the part. Any auto-supports is not smart enough to know this.




Your intuition is correct - tree supports do not leave a very good underside surface, worse than standard supports. Designing with a reliance on bridging instead of supports will give you a nicer, more consistent underside surface.


I think this is a case of differing settings - I've had tree supports that came off a horizontal supported surface so cleanly that I couldn't tell what surface was supported. I've also heard of guys using auto standard supports getting similar results, but have never had much success with them myself.


I find trees tend to come off more readily in one piece, but they can lap funnily into areas they don't belong.


I feel like it'd be possible to design the supports in as maybe boxes that pop off somewhat cleanly but don't wreck the surface. I may try that since I have some extra filament and printing time...


Oh also, I've had great success using coarse thread screws like wood, sheet metal, plastite, etc. Inserts are nice, but IMO overkill for 99% of parts - you don't really need to open and close these things so much that a coarse thread will strip the plastic out except in the case of an access hatch or battery bay. A machine thread could certainly strip though, those are too fine for the plastic to hold long.

In Topic: Anodizing 130 Motors

03 November 2019 - 09:47 PM

Not dead, just slow. Anodizing motors that are assembled might not work, I'd expect the motors that are colored are done in the factory.

In Topic: Technically not a modification post

03 November 2019 - 09:45 PM

See if you can thrift/acquire a broken one for parts. Your local might have some parted out blasters you could acquire for cheap.

In Topic: Cyberpunk 2077 Kang Tao 3D Printed Nerf Gun

27 October 2019 - 11:21 PM

You went with manual supports?!?


First, I'd like to see how you've gone about making them. Second, those grids that are left over look more difficult to remove than some of the auto-generated supports I've used, especially tree supports.


This remains an excellent post, I hope you continue to fill it out.