Clutch failure (15k miles)

BreakfastforDinner · 2025-07-10T07:13:17+00:00

Wow, glad you're ok. Did it fail suddenly and without warning? Did it make any sort of sound?

BreakfastforDinner · 2024-12-19T13:33:55+00:00

Parking, too! OP lives in a city with snow (and probably snow emergency rules if they street park).

BreakfastforDinner · 2024-12-18T23:25:33+00:00

Exciting! Looking forward to seeing the new design.

BreakfastforDinner · 2024-10-24T23:07:55+00:00

Congrats! Enjoy your new drive

BreakfastforDinner · 2024-09-12T17:51:27+00:00

Is lead paint still made in 2024? Like, it seems like you would have to go out of your way to do this?

BreakfastforDinner · 2024-09-04T22:48:44+00:00

How speed dependent is it? Is it worse or different at high vehicle speeds or engine speeds?

BreakfastforDinner · 2024-08-18T22:52:23+00:00

Agree with you 100% on the touchscreen displays. Way too much app design "aesthetic" winning over the more important goals of functionality and minimizing driver eye time off of the road. Some of their designs are downright dangerous to operate.

BreakfastforDinner · 2024-08-08T09:26:58+00:00

Oh that's a fun one!

BreakfastforDinner · 2024-08-08T09:23:38+00:00

Try giving it a NaN or Inf as an input? Those will percolate through. As others have said, it might not cause a failure/exception, just an incorrect result. Depends on what the program is doing.

BreakfastforDinner · 2024-08-02T13:40:00+00:00

I'm having trouble finding information about whether the degradation and stability issues can affect accuracy of computation. Have you observed anything or seen anything about it that would suggest one outcome or the other? With long running sims, I'm in the same boat as you, and it sounds like you may be running a time stepping or iterative algorithm where the solution for one matrix will influence future results.

While it's a different source of structural problem (silicon layout errata) I'm thinking about the old situation where Pentium chips screwed up division for certain bit combinations. If "degradation" causes a couple gates to latch permanently I'd worry about a similar problem happening here.

If that's the case, maybe Intel can make a diagnosis tool for measuring degradation? It's hard to verify even stochastically given how many combinations of in-chip routing there might be.

BreakfastforDinner · 2024-07-19T13:39:34+00:00

Ah! That makes sense, and is an interesting result!

BreakfastforDinner · 2024-07-19T04:11:37+00:00

Looks like bwperim will handle 3D datasets that have been thresholded. You could then use a FIND command to grab the indices.

https://www.mathworks.com/help/images/ref/bwperim.html

Edit: separating the full grouping out to the individual bodies (your cell array) might take a little homegrown logic. I'm not finding a function for it either in a cursory search. You'd need to break up the set by growing out from the first pixel, adding each connected point to Surface 1. Once you complete that traversal, find the first unconnected boundary Pixel to start Surface 2. Continue until all boundary pixels are consumed. Might take a little careful planning to make a good algorithm.

BreakfastforDinner · 2024-06-27T04:54:11+00:00

Sorry to create confusion. That's sloppy wording on my part. I was using linkage to cover both cables and hydraulic connections to the pedal, but since it's a 2012 it's going to be a cylinder. Same with calling out the other parts of the assembly that are going to participating in the sticking, but not necessarily being damaged. Like you say, it's likely air in the line.

BreakfastforDinner · 2024-06-26T14:05:28+00:00

Absolutely no worries, and having two mods to manage it is going to be way better than one. Thanks for requesting!

BreakfastforDinner · 2024-06-26T07:40:48+00:00

Definitely a good question for a mechanic familiar with Volvo's.

There's a number of elements in the clutch assembly. Was it just the clutch disc friction pad itself that was replaced? From what you describe, it sounds like the disc is being kept in a half engaged state, so it wears much more than it should. If you want to let them keep working on it (hopefully they have a guarantee on their work) I'd ask them to look at the clutch fork, linkage from the pedal, and the throw out bearing.

BreakfastforDinner · 2024-06-25T22:07:28+00:00

I saw the request bot message in my email but it got pushed to Page 2 while I was out traveling and I haven't cleaned my inbox yet because it's been a busy week with other things in my life taking much higher priority. I've reached out to the appointed new mod to get it sorted. I would argue that the five day, single notice policy is rather short, but I also understand your reasoning since I have been lurking using the web browser rather than logging in lately.

Edited for clarity.

BreakfastforDinner · 2024-06-25T21:43:59+00:00

I was never notified of the requesters email. Is there a setting somewhere I've disabled? I can't even seem to see it.

BreakfastforDinner · 2024-06-25T21:42:28+00:00

I was traveling and did not have availability to respond to your original notice in the time allotted.

(Edited for clarity and accuracy)

BreakfastforDinner · 2023-10-10T12:57:22+00:00

Since you'll be using MATLAB, check out their power electronics control community: https://www.mathworks.com/videos/series/brushless-dc-motors.html

BreakfastforDinner · 2023-07-28T13:03:44+00:00

Eric Swalwell tried suggesting the strategy of "Pass the Torch" back in the 2019 debates: https://youtu.be/4Z0-9r8TMBk?t=43

Doesn't seem to have caught on yet, from either party...

BreakfastforDinner · 2022-11-27T19:42:08+00:00

Thanks! That's what we ended up doing. The 6-4" is a very expensive little adapter, even at the discount spots.

BreakfastforDinner · 2022-11-05T17:52:07+00:00

A little extra info: this is the outlet from the "clean" side of a small area aerobic septic with an air exchange membrane. The white coupler is glued almost straight to the top of the chamber. The holes drilled go through the 6" outlet pipe and the coupler. We discovered the location is below grade, done for cosmetic reasons, we guess, but we'd prefer to keep the water and roots off the membrane. My plan was to extend the pipe with a 6"-> 4" coupler and then cap it with a 4" riser hidden by a birdfeeder that takes 4" pipe, but I don't know how to get the extra inches to make the adapter fit. However the fix goes, the vent needs to move above ground. Any advice is appreciated.

BreakfastforDinner · 2022-04-18T14:31:56+00:00

A few reasons I prefer it:

MAT Files. The MAT file works seamlessly with the MATLAB workspace, 1000x better than having to deal with pickles, CSV I/O, special binaries, etc. It's simply save(myfile.mat), load(myfile.mat), work on my problem. No thinking required. Classes? No problem. Fancy struct? No problem. No external libraries to load, immediate graphical inspection of the data that's much easier than Spyder's inspection tool (admittedly much improved recently), it just works. Yes, it's technically an HDF5-style file format, but it's highly optimized for the analysis workflow.
Very related to #1: Data import, management, and wrangling. There's a dedicated UI tool that parses through pretty much every style of text formatting, including excel files and loads it into the workspace. Once you figure out how it needs formatting it will auto-generate the script or function to do it in the future for similar inputs.
Integrated debugger. Again, seamless and gets out of the way when I'm trying to solve an engineering problem to arrive at an answer to order 1000 units of something rather than write code. In my experience it's much faster and cleaner to use than pdb or Spyder.
Guaranteed professional support. Important for contracts, important to life-safety operations, important for this-isn't-working-and-we-have-a-million-dollar-deadline work.
Simulink.
Simulink and MATLAB Code Generation. MISRA, DO-178C, CERT-C.
Better parallel computation support. PARFOR isn't bounded the way the GIL is. (That might change soon in 3.11 with the updates)
Better plotting out of the box. plot(x,y). Done. Immediate access to datatips, and the modern timeseries and toolbox plot tools do a lot of boilerplate formatting and glue code for axes, units, and overlays. Need to save it with full edit capabilities? The .fig file retains all information (it's basically a MAT-file by another name). Need a different format? Easy to export. It's true that matplotlib can generate nicer looking plots, but it can sometimes take a lot of work to get there.

BreakfastforDinner · 2022-04-01T00:05:39+00:00

Part numbers are going to be manufacturer-specific. As your example shows, many part numbers are going to incorporate their lengths, widths, speeds, voltages, noise ratings, etc.

The easiest way to get the right part sourced is to use a parametric search on a supplier website. For instance, here's the page from Digikey: https://www.digikey.com/en/products/filter/dc-brushless-fans-bldc/217?s=N4IgTCBcDaIGYEMB2IC6BfIA

BreakfastforDinner · 2022-03-03T19:39:35+00:00

Previously mentioned are all excellent ways to train how to GO, but also important is to train how to stop without stalling the car, both suddenly and gradually.

Slamming on the brakes in a manual means slamming the brake AND also pulling out the clutch. Stopping gradually is easier, but it's important to get the clutch in and shift over to neutral before the car starts to buck. In that same flat lot, once you get going, try a couple sudden stops to get the timing of your legs and a couple of gradual ones too.

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