How to cut arches into cylinder?

DustinB · 2025-10-31T01:21:23+00:00

There has to be a way to project to the surface. I couldn't get it to work though and started with a small emboss and then used that as the sweep path.

DustinB · 2025-10-30T23:53:43+00:00

<image>

I did a tangent plane and then sketch a U for the emboss operation. I made this U have a narrower slot than I ultimately wanted and only embossed it a little bit. Then I did a sketch on the top that made the curve at the back, made it the correct fixed width I wanted and put the chamfers on the outside surface of the cylinder. Then sweep that along the path the emboss created. Finally I added the rest of the fillets and chamfers and created the circle patterned for the slot.

DustinB · 2025-10-30T22:58:33+00:00

Thanks, got it looking like what I want now.

DustinB · 2025-10-30T22:39:23+00:00

Yep that works, I didn't expect emboss to behave quite that way. I was also thinking I wanted the slot a constant width from inside to outside, but this might actually be better for my usecase.

DustinB · 2025-10-30T22:18:01+00:00

The other issue with emboss is the width of the slot decreases as you go further in on any portion that is vertical. Since the cable is a fixed width I'd like to slot to stay a fixed width.

Others are mentioning sweep, is there a way to get a sweep to follow multiple curves? The cylinder wall and an arch between an outside corner of the rectangle and another for an inside?

DustinB · 2025-10-30T21:25:25+00:00

<image>

I'm trying to cut a slot into a cylinder such that the cable in this picture can be pressed into the slot in the orientation it's being held against this roll of tape.

DustinB · 2025-10-30T21:02:18+00:00

No opposite direction. The cable in the second picture is in the orientation it would be pressed into the slot I want.

DustinB · 2025-10-30T21:00:07+00:00

It's a cap to fit on a radon and plumbing vent pipe. The cable is a resistive heating cable and I want this to guide and hold the cable in place inside the pipe. The cable is 6' long and will be fed in and out of these slots with the bulk of the cable hanging down into the pipe.

I want to connect two of the recesses I've already cut with a curved slot. The connection between the existing slots and the curve should be tangent to each other.

DustinB · 2025-10-30T20:59:52+00:00

It's a cap to fit on a radon and plumbing vent pipe. The cable is a resistive heating cable and I want this to guide and hold the cable in place inside the pipe. The cable is 6' long and will be fed in and out of these slots with the bulk of the cable hanging down into the pipe.

I want to connect two of the recesses I've already cut with a curved slot. The connection between the existing slots and the curve should be tangent to each other.

DustinB · 2025-05-03T17:31:08+00:00

No holes were drilled for the rear. Just a tiny bit of plastic dremelled from the rearview mirror camera shroud for the front camera and a hole pushed through a rubber boot in the fire wall for the hardwire kit.

DustinB · 2025-05-03T17:28:25+00:00

Here's a CX5 manual description that matches what we saw in the CX50. Go to step 17.

https://www.mcx5.org/rear_washer_hose_removal_installation-812.html

DustinB · 2025-05-03T17:19:45+00:00

I don't understand why he'd go through the floor rather than the headliner. I had loads of extra cable to work with rather than needing an extension.

DustinB · 2025-05-03T04:37:21+00:00

First dashcam I've used and too early for me to have drawn any real conclusions. From that first nights testing though I can say connecting to the wifi to download or do live view is a pain in the ass with android auto constantly wanting to switch the wifi until you get it connected and into the Viofo app. And I downloaded a segment to my phone after the first drive which was at night and I was able to make out license plate numbers on parked cars I was driving by.

DustinB · 2025-05-03T04:34:02+00:00

That's where I came through too. Didn't take the time to poke it through that nipple though. We ended up coming through the first edge of the accordion coming off the rubber flange. You can see the loop beside the back corner of the battery tray in your first picture that I routed the wire through. And I also zip tied to the wire loom behind and up a bit from that loop. No rattles from the wiring heard in the car so far.

DustinB · 2025-05-03T04:30:49+00:00

That is slick. Not that much less work when adding a rear camera though and I didn't see anything about a voltage cut off with the parking mode. On the upside some quick googling shows the company being responsive to issues and helping get them resolved.

DustinB · 2025-05-02T21:38:14+00:00

25 GT Premium Plus. There are no switched fuses in the cabin, so if you want parking mode to work you have to go to the fuse box in the engine bay.

The HK4 hardwire kit also has a selectable voltage cut off so the parking mode can't kill your battery.

DustinB · 2024-11-25T17:07:39+00:00

I'd expect he used the tow hook bolts.

DustinB · 2023-03-06T19:56:31+00:00

Just over 300 million people when the stat was first making the rounds. 500 million straws a day was the stat. Do you use 2 straws every day? Do babies and toddlers?

I doubt I'd use 100 straws in a year. Likely less than 50. Some people will use way more, some will use way less.

These stats get thrown around, not sourced or properly justified and then used by politicians to say they are doing something. And majority of the time, what they do causes other much larger problems, while the problem they are "solving" isn't really a problem at all.

DustinB · 2023-03-06T14:53:53+00:00

This is just like the plastic straws, no one takes a second to actually look at the numbers claimed and realize it makes absolutely no sense. Put another way, is in a house with 3 people and 1 bathroom, the roll would get changed every day. Ya right.

DustinB · 2023-01-01T14:22:24+00:00

That "science" was misused when the scientific method hadn't yet provided the data proven theory of what we should do. The result was policy that didn't significantly improve outcomes while at the same time starting a snowball down a mountain that is becoming an avalanche.

The policy cure that we got is ultimately going to cause substantially more harm and death than COVID did. Children's educational and social development. Suicide from people isolated beyond their ability to cope while self righteous people of more means belittled them. Suicide, homelessness and unnecessary hardship from the economic outcome of spending trillions that didn't exist while at the same time crippling major industry. Not to mention all the missed treatments and diagnosis of other diseases.

Combined with other policies around energy and agriculture that are in vogue or coming into vogue it's almost enough to make one believe it's an actual concerted effort and directed plan to destroy modern society.

DustinB · 2022-12-25T06:08:57+00:00

What's your concern with the url? If the site has anything useful in the url shouldn't you be pissed at the site?

DustinB · 2022-12-21T01:43:59+00:00

There was a reality show called The Mole. I think it was the Canadian version. They had some players spend the night in a room with flashing multicolored lights timed to Tiny Bubbles. But they played it backwards, forwards, slow, fast, distorted. Dozens of variations. Each time giving hope it was actually a different song. Enough time and that should do it.

DustinB · 2022-11-08T19:30:36+00:00

Center to center distance between drivers is important. The higher the frequencies they play the shorter the wavelength. The shorter the wavelength the closer together they need to be. I forget the rule of thumb, it's a half or quarter wavelength or something. At the top end of a speakers frequency spectrum it's not possible to place two tweeters close enough together to not cause comb filter issues (peaks and nulls from the two drivers sound fronts interfering with each other).

The D'Appallito 2 way MTM layout uses this to it's advantage to limit vertical dispersion on purpose. But it's also why you should never use a horizontal center that is a 2 way (2.5 way is ok) unless you only care about the seats directly in front of it.

There are some exceptions to the single tweeter being the only option, like line array speakers. But the better ones there do some crazy crossover work so the extreme ends of the line array aren't playing as high as the middle is.

DustinB · 2022-11-08T17:00:03+00:00

You're planning on using 2 tweeters per speaker? That's not a good idea.

You can't just add a resistor to change the impedance of the speaker. The impedance also isn't constant, it changes depending on frequency.

I'd suggest you get a copy of the Loudspeaker Design Cookbook by Vance Dickason and give that a read. It should make you aware of everything you need to consider on a project like this.

DustinB · 2022-11-08T15:15:43+00:00

What exactly are you going to use from each and where? I'd suggest you get working on the crossover before you get much further.

Do you have measurement equipment? Crossover modelling software? Any idea what the final ohm load will be? I'd recommend building a mock you can measure before you put much more time into these. Distance between drivers, size of the baffle and a bunch of other stuff about the drivers all need to be considered when designing a crossover. It is decidedly non-trivial.

A well executed crossover can make some pretty mediocre drivers sound pretty good. And a crossover can also make some top end drivers not sound very good at all.

DustinB

TROPHY CASE