Depends on on your definition of engineering. There are valid definitions that can argue either way. This is amazing stuff, and *well* beyond "wrench monkey", but at the same time I didn't see any talk about things like computing how fast the part changer could actually be allowed to spin before the part tips, how much difference in deflection you get by milling it from top to bottom or how much thermal expansion different milling plans would experience. At the same time, I'm not saying they were negligent in _not_ doing those things because this is likely a case where tho cost of doing that level of engineering far exceeds the benefit of just being over conservative. Which costs more; an hour doing math in the office or an extra 20 seconds on the machine from running the part changer as slow as you can?

This is engineering at its core. Nerds who do nothing creative and plug values into a formula will tell you otherwise though.

​@@benjaminshropshire2900just keep quiet.

@@benjaminshropshire2900 Interesting stuff!

@@abhirmalhotra5103 I disagree. "Plugging numbers" is not engineering by any definition I'd acknowledge. The engineering is understanding the underlying system well enough to know what questions to ask and how to answer them. Usually the full answer ends up including numbers, but very often the important part is done before you get to the arithmetic. As an example, for the part changing operation, what needs to be considered relating to the part tipping over? How fast the changer spins around is one thing, but that's actually only an indirect issue because it causes sideways acceleration on the part, and another thing that causes that is starting and stopping the rotation. That is to say you could have a situation where the part would be fine with a normal change cycle and only tip if you manually jog it around. You might or might not need the numbers, but thinking through the implications of the math is about half of what engineering is. (The other major bit is getting specific about the requirements: turning "the part doesn't fall over" into "the total acceleration vector always points inside the contact points of the support arm".)

Absolutely a work of CNC art ain't it.

Thanks We have been posting shorts everyday but skipped a few long form for BOOMBASTIC

​@TITANSofCNC we don't need shorts we need more old school videos like you used to do

Hahahaha pleasure to hang out and talk chips!

Absolutely, Hope to do it again some day!

Hahaha i hear that! Big is relative! At General Atomics we had a Waldrich Coburg VTL with a 60 foot diameter table

@@barrysetzer see that the size that i use to work on

Lol not ME

The problem was that the high feed mill i wanted to use was 4” diameter. And would only take a .078” depth. An endmill is so much more forgiving, and the TE is so versatile. Thats why we went with that method

For such parts, a code generator based on a 3D model is used

Nah i didnt account for wear. Honestly, i was very interested in seeing how long the endmill would survive

@@barrysetzer how many hours did it last?

Ummmm this was done on a mill turn. But you cant turn this part. Soooooo thanks anyway

you can rip the metal out faster on a mill turn , Round features both ends and you can hit the through hole at the same time on a steady. Apart from the fancy external detail we do valve bodies like this all the time never once would we consider this as a faster more reliable option .

@@barrysetzer Personally, I thought it was a great example of adaptability. You use what is available and responsibly. 👍

At 100ipm, .1” stepover, 3” deep, i was getting around 8 hours. But thats kinda unfair because i had it doing some brutal toolpaths

@@barrysetzer okay awesome, thank you for sharing! 100 ipm on an endmill is dark arts, i will get to that point one day. I bought my own version of fusion 360 this year and have been using it as much as possible. We only have 3 axis machines, but once this shop closes or i get tired of being underpaid im going for a position like one at titans! I want to be surrounded by motivational and positive guys that actually have a passion for machining so im not the only one whos nerding out and understands whats going on. Thank you and the team for providing this little bit of info! Keep it up

Pretty sure this is just an dislpay piece for the yacht's owner, not a functional part.

@@verakoo6187 that would be a little let down. I mean sure its am impressive part size wise. But a functional part is a different game altogether. Lets see...

Having the rotary move unlocks a clamp on the axis, and actually reduces the rigidity of the machine. That's why 3+2 operations are still so common nowadays even with fancy machines. Also the linear axes typically can handle a heavier load than the rotary axis can

@@Marlfox570 interesting. I know I've seen machines milling on rotating parts (so clearly you can make that axis tight enough), but I could see how it would be simpler to build the table if only need high precision and rigidity when it's not moving (you could build it like the taper in a tool holder for example).

@@benjaminshropshire2900 well you can still machine with the B axis unclamped no problem in many cases but you're now relying on the strength of the motor attached to said axis versus having it clamped down. Having it stationary is going to be better for very heavy cuts in harder materials.

Well actually most horizontal machines (that only have 4 axes) come with a weaker motor that isn't recommended to use with simultaneous 4 axis milling. Though many manufacturers allow you to upgrade said motor for $$$

@@Marlfox570 are you thinking about rotational rigidity around the B axis? If so, then at least for the round portions of the part, that shouldn't matter as the un-commanded motion should be parallels to the surface. As for around the features sticking out, would there be enough backlash to mess up a roughing pass? For a finishing pass, different story.

Because all the features like the mounting feet etc. on this machine, i could have rough turned it, but it would have removed very little material because of the obstacles

these just display the different toolpath operations. you can set it to display different colors for each operation or for each tool.

@@ipadize oh okay, thank you! Kinda makes sense that it's able to display whatever they want. Obviously now that I think about it. 🥴😀