u/Terrible_Ice_1616

Honestly this makes entirely too much sense

Was getting annoyed because I thought I'd have to stick the tool out a bit more and re-indicate but by some minor miracle everything fits

Op 5 of some 316 parts, m3x.5 spiral flute broke on the first one after proving it out on a scrap piece. Managed to back it out with a pair of pliers and idk whether to buy a lotto ticket right now or never again because that's the luckiest I'll ever be

Honestly it wasn't too bad. I ended up leaving ~1/8 stock for the finishing cut so the little nib would be supported and it worked great, granted I had to dial feed way back to .001 ipr. Tried using the same process to make one from 17-4 and the insert was decidedly unhappy and the tip fucked off on the second part.

Bought this from China and I was fully expecting it to be counterfeit b/c it was $250 bucks but I figured if it talks to the receiver, I'm happy enough paying $250 for something I can use to locate stock for op1. But after getting receiving it in what appeared to be a legitimate Renishaw box, and it locating a boss within a tenth after calibrating, as well as the nice finish and printing on the unit itself I'm not so sure it's fake. Some kind of shenanigans going on to be sure, the other theory I've read is that factory workers run a hustle reporting them broken and reselling. I'm still kind of leaning towards it being a fake just on the count of the sheer quantity available on ebay and they're all omp40-2, but if it is they did a bang up job.

Incredibly happy with how my latest endeavor has turned out. The sound has exceeded my wildest expectations, and while there's a few things I can nit pick on the execution (the upper vertical patterns just did not want to locate properly no matter what I did so they're off at one junction or another by .015" or so, just enough to be visible.

But when I take off my critic hat and put on my listening hat I'm blown away. The clarity and amount of bass such a little driver can make, and the tweeter is crystal clear and non-fatiguing.,

Plan to add some damping/bracing but as it is, it's very stiff/dead, I used pocketed screws to join the panels at each edge with 7 screws on the long edges and two on the short for each panel, and all the sealing surfaces are gasketed which I think also helps quite a bit with damping.

Over the moon with how well this turned out - I couldn't get to a handful of the internal screws b/c the tweeter was in the way but the tweeter has to go in first bc the woofer ring overlaps it a bit, and I planned this whole thing extremely poorly (made the baffle picking some locations that looked good for endholes w a rough sketch of the panels but then I changed my mind on the miters and the locations weren't so good anymore)

But it doesn't matter - the gaskets did their job and there is nary a leak on the thing. On top of that despite having no damping material inside yet the cabinet is extremely dead. And I was worried the enclosure volume would be too low but I finally calculated it and it came out right on target (if you ignore the fact that the woofer and tweeter take up volume but that's what the damping material is for)

The bass that just the one puts out is incredible, and it does it without distorting the mid-range. I haven't hit the excursion limits yet which is great b/c my plan was to add some LF boost to extend the response 10-15hz beyond its natural rolloff @ 70hz. The tweeter Is also fantastic, great resolution and presence without sibilance or listening fatigue.

Really outdid myself w this one if I do say so myself.

From "Crows Are White" - it was decent but really only worth a watch for this guy IMO, feelgood story but the director could not get out of his own way which I guess was kind of what the movie was about but some of the choices he made were just bewildering. This monk really stole the show tho

Also the first aluminum parts run on our new DNM4500 which so far I'm loving other than the control taking some getting used to. Made in the mill b/c we didn't have any round stock big enough.

The purpose of the ring (beyond aesthetics) is to space the woofer out from front baffle so that its acoustic center (the average location where the sound is emitted) is the same distance away from the listener as the tweeter. I made a little two part test baffle and some gauge blocks to validate some measurements I took to determine the appropriate offset. It's not an exact science by any means, as the acoustic center will vary with frequency, I chose the offset to be most accurate at the crossover frequency (the frequency where the levels of the woofer and tweeter are equal).

I was debating just roughing the ring turning taper on b/c I don't have be best luck with getting good finishes w long engagement on tapered endmills but these came out well enough I don't think I'll skim them in the lathe.

Box will be sealed and DSP'd to extend the low frequency response, pairing it w some Chinese ribbon tweeters that have been sitting on my shelf for a couple years now waiting for a project. The pictured enclosure isn't finalized just a quick mockup so I could get a sense of scale.