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Here is something along similar lines I had worked on: viewtopic.php?f=29&t=23240

Feed was not very reliable on the prototype I had made but the basic idea worked:

Another beauty, nice work! I love the simplicity of the resetable valve. Did you check at what pressure it will "pop"? The gun was literally silent! This is one interesting elements of hybrids vs pneumatics, the heat generated by combustion is a significant contributor to the pressure, and therefore...

I found the same with steel bbs, different barrels made no difference.

Otherwise known as a pellet/bullet shooting crossbow. I built this thing to see: A) how accurate are they? B) how fast do they shoot? What I've learnt is that these things are super finnicky! I've shot paintballs with insane ball-on-ball accuracy at 25 yards, then tweaked the string/pouch and had pa...

As brilliant as the "captive ball" is in terms of simplicity, I feel that there must be some significant power loss overcoming the o-ring friction, even if the ball bouncing back is not an issue. My impression is that a stepped piston will ultimately give the best performance: https://i.imgur.com/lE...

I've been revisiting this idea in my head lately, maybe pistons would work as suggested earlier where a loose ball was less than ideal: https://i.imgur.com/0VVikt2.gif Not shown are the return springs keeping the pistons in the "rest" position, as well as some sort of flow control screw in the porti...

Finally some activity! https://i.imgur.com/l4lZK8w.gifv 1mm deep cut in C12L14 steel just for the purposes of testing. I found a nice little business not far away that does small quantities for a variety of materials and I made an order to start things off: https://i.imgur.com/Gtmn3sk.jpg A neatly s...

To get myself to build some stuff again I decided to slap a cannon together in my lunch break, with all designing and calculating done on the fly. I noticed that the projects where I spend a lot of time designing and preparing often don't actually end up being built at all.. Basically this is a quic...

Here's my latest toy. Making a 1000x200 mm surface plate, needed some precision measurement Neat! Still some way away from that level (pun?), I'm here impressed by automatic feed... look at it go! https://i.imgur.com/fL4Z0XR.mp4 I think I've machined more steel in one evening than I did with my She...

How's accuracy? Have you done all the alignment checks? If you don't have a machinist's level to level the ways, it's worth doing a quick eccentricity / alignment check using "Rollie's Dad's Method" I still don't have a dial indicator... but I did play with some test cuts and everything seems to be...

Quick Change Tool Post installed: https://i.imgur.com/sGfIXf0.jpg A very solid bit of kit for the price, much better than I expected. A little taller than I expected so I milled out a 5mm deep square on the compound slide to give a bit more distance before the holder bottoms out and to keep it rigid...

That's actually pretty good. It actually looks exactly like many sketches I've seen over the years in machine shops. A lot of places work off of sketches just like that. The information content is what matters, and as long as they know what to do, then the drawing is just fine.

Hey guys, its been a very long time. I previously used the name "*###*" I lost access to my account and it seems I'm sol as far as recovery is concerned. I have built many more great toys over the years and I felt like getting back into the community to share my knowledge as well as to learn and bec...

Not spudguns exactly but some amazing miniature pneumatics that are actually functiuonal:

hectmarr wrote: ↑

Mon Nov 30, 2020 8:17 pm

women etc.