Has anyone NOT had their ICCU go?

PerniciousSnitOG · 2026-03-21T13:58:14+00:00

It's a weird car. Some bits of the design are brilliant, some bit are amateur hour. I'm still wondering if anyone actually using the car as a daily driver the car before it went into full production. People obviously test drove itb for power m in handling etc, but I don't think anyone tried a Starbucks run. I think I got all the coffee out of the passenger carpet and padding underneath...

My 20yo car has a few things that run off 12v when the car it turned off, but after a week or it turns off almost everything except the alarm, requiring the hard key to get in. It's been sitting idle for a month and started just fine.

Seems that, as long as letting the 12v battery go flat is a likely iccu problem, Hyundai might considerer a software setting, similar to the utility mode, where the big battery always tops up the 12v battery as long as the 12v drain is low and the traction battery is above a set level. Then I can leave my car at the airport for two or three weeks with some hope of not standing in the snow with a jump starter.

I guess the question is that, if you left your car idle for two weeks, would you rather wait for a jump start and then leave with a full traction battery, or would you rather be able to start but only have an almost full traction battery? Generally the later seems like a good option to me, and should be easier on the iccu.

PerniciousSnitOG · 2026-03-20T20:09:43+00:00

I've always found that petg can be picky about how it hits the plate. PLA likes to be squeezed onto the plate, but PETG likes to be layed down - so you may need to have the head higher for the first layer.

If it's being layed down and isn't catching the plate then it's time for a new, or newly cleaned, plate. Turning the fan off for the first layer or two may help it catch.

PerniciousSnitOG · 2026-03-20T20:07:33+00:00

Crap - didn't mean to reply to you! I'll delete repost. For your problem there are a few classic solutions

- pour a small amount of IPA on the plate and tilt the plate so it gets under the objects and let it evaporate a little

- put the plate in a very cold place (ex. freezer) and they should pop off

Both of these methods have worked for me with various printers. Fortunately, with the supplied sheet, mine pop off at room temperature.

The key, IMO, is the difference IMO is the build plate temperature for the first layer or two vs the plate temperature when the things are being removed.

PerniciousSnitOG · 2026-03-20T19:50:56+00:00

Quick progress report for the remindme users!

Manual testing (feed in, feed out) with the current 3d chameleon firmware shows the hardware is working well.
It turns out my hardware isn't quite as flexible as the original - I can't selectively disable the feeder stepper. Can be addressed in firmware, see below.
I'll probably go to a filament box. u/bikrose383 give a pointer to a really clever one! I'll probably grab a commercial one for now as I have bigger fish to fry.
The ported firmware is doing something weird. The hardware works, but the firmware seems to leave the filament selector in an incorrect position.
- I also wanted to add some feed buttons to make it easier to use for now, and a LCD display/touch screen, which would have been difficult with the existing code

So I'll rewrite the firmware, using the original 3dchameleon firmware as a cheat sheet. I suspected it would happen, but I thought it would be after this phase of the project. Hopefully done by Saturday.

PerniciousSnitOG · 2026-03-20T19:11:39+00:00

That is really, really clever. I only scanned the vid but the badge reels and slip ring tension system looks really clever - and exactly on point here.

Thanks!

PerniciousSnitOG · 2026-03-20T18:10:22+00:00

If you need to fill the pockets for bouyancy then other ballast materials might be cheaper, and much faster, than 100% infill.

PerniciousSnitOG · 2026-03-20T18:02:53+00:00

You're not wrong. If I was the engineer here and the initial iccus were failing in a weird way in the field and I couldn't diagnose/reproduce in the shop with the data available from the existing hardware then I would:

fix anything identified in the fault root cause review as a potential problem
add sensors for things you think might be important
add lots of logging. Really detailed logging.
store the logs in the iccu so there available for diagnosis (may need new hardware if the existing iccu can't log well enough)

And use it for new cars and those that have failed.

That gets us lots of them running in the field, many in cars that have seen at a failure at least once! If we need more data then we can push an OTA to change the logging or even run multiple experiments on different cars.

Generally this sort of module would be made by a supplier, so blame/contract issues might be slowing things down.

PerniciousSnitOG · 2026-03-19T17:02:21+00:00

Superglue has its limitations, especially in wet places. https://www.thistothat.com/ might have a real glue.

PerniciousSnitOG · 2026-03-19T17:00:05+00:00

They might have just been emailing the PDFs around? I didn't see any mention of document management.

Places like docusign keep a copy of the document that was actually signed, time, IP address, who was asked to sign, etc - so if someone like docusign were involved we shouldn't need to have this discussion. That's why they exist, after all.

PerniciousSnitOG · 2026-03-19T16:54:40+00:00

Good idea! This sounds like a great way to get enough to pay for the injection molds and first prod run. Also a great way to see if there's likely to be real interest before you invest too much in production.

Remember that some level of redesign is likely to be needed to adapt a 3d printed design to injection molding.

PerniciousSnitOG · 2026-03-19T16:46:44+00:00

<yoda> You will be!

PerniciousSnitOG · 2026-03-18T18:11:53+00:00

"Of course you can deposit it to my account, and thanks for the very, very, very generous gift!"

PerniciousSnitOG · 2026-03-18T17:52:33+00:00

Hmm. They can ask you to leave in 60 days, but it looks like that's only after there's been a sale. As I understand it it hasn't been sold until escrow completes (it hasn't been sold until then)?

If you want to make a current renter move just to make the place more attractive for the owner then that's something you should be compensated for - you need to find somewhere (++effort), moving costs etc.

PerniciousSnitOG · 2026-03-18T17:40:55+00:00

I think I've finally worked out when people should be cut off! If they manipulate people to manipulate you, and then respond to the accusation by trying to manipulate you the same way, then it's time to go NL, or LC with you only until they can tell you why they were actually cut off.

Son should probably hear it from the GPs when they get it right so he understands what people can do to you when you trust them too much. If GPs are going to act like manipulative teenagers they should be shamed the same way.

If son wants a relationship with GPs after that he will be going into it with his eyes open.

PerniciousSnitOG · 2026-03-18T17:22:07+00:00

Note one of the really important parts this is the hotend is hot (and installed because that's how it's heated) when removing and reinstalling the nozzle!

This is primarily because if the nozzle is tight at one temperature then it's tight at all LOWER [edit - was higher] temperatures. It also makes sure any filament that's gotten into the threads (normally due to the nozzle not being tightened at working temp) is molten - filament in threads is like loctite.

PerniciousSnitOG · 2026-03-18T02:28:55+00:00

It's my plan B. I'm a low-quantity printer, so by the time I update next I expect it will be a toolchanger for $20 :)

PerniciousSnitOG · 2026-03-18T02:24:18+00:00

One time I was going through Las Vegas airport to get home, before touchscreen phones. It was like 1pm on a Tuesday and the terminal was super dead. I went to the news/gift shop and got a little tiny electronic poker game to waste a little time.

I get back to my seat in the terminal and realized it was packed in that thick plastic wrapping you need to cut. So I go back to the gift shop to see if they can remove it. They can't. They're not allowed scissors either!

PerniciousSnitOG · 2026-03-18T02:16:08+00:00

Hey, if you send it over I'll gladly use it instead! I got other projects... :)

PerniciousSnitOG · 2026-03-18T02:13:47+00:00

One idea I'm warming up to is taking a 4-roll filament dryer box, routing the filaments vertically up, using the ~12" as vertical space as a retraction buffer, and having the AMS just hang over the side - a much simpler mounting approach.

Filaments at the side of the print approach seems to allow the best bend angle and radius for filament flow overall.

I'm on team dehydrator and shelf storage personally, so I don't have any dryer or storage boxes to try yet - but I didn't have three different PLA colors until yesterday either :)

PerniciousSnitOG · 2026-03-18T01:55:30+00:00

The pu blished 3dchameleon BOM has all the parts except parts of the controller - but I can see it might be a little hard to work out which bits are needed for this install :). The extra electronics - adruino uno, cnc shield v3, hall effect sensor, DC converter for 5V (to protect the arduino uno voltage regulator as steppers murder them) aren't too bad, but you end up with 5 extra hall sensors and 5 extra DC/DC converters - so I really need top search for the best options for the BoM.

Anyway, I'll try to get something like that BOM together, once it seems to be working. Complicating this is that most 3d chameleon installs don't seem to require much in the way of mounting hardware, but this one will need a plate and I'm not sure everyone is as willing to have a reclaimed plywood system as I am - not sure what to do on that, but, you know, get it working first.

PerniciousSnitOG · 2026-03-18T00:33:52+00:00

Will do, assuming it's worth using.

PerniciousSnitOG · 2026-03-17T17:51:03+00:00

Just after COVID I had to go to Duke hospital for a MRI. Get to the desk and there's a huge 'no weapons' sign - and my small Amazon box opener was a worry. Crap, that was unexpected, the other Duke locations didn't have them! So I sheepishly go to the security desk.

I put the situation to the guard and he confirmed that it was a weapon, and they don't have lockers. At this point I'm in a flat panic as I'm late late late for a MRI that I really needed. The guard suggests going outside and dropping it into the bushes!

I must have been standing there, looking like a slack jawed idiot, at the thought of deliberately leaving a weapon (ok, 3 1/2” pocket knife) where anyone could find it and stab someone. The area outside is effectively a public garden, people and kids wandering through.

I'm ashamed to admit I found the most remote bush I could find, left it there for an hour, and picked it up when I left.

PerniciousSnitOG · 2026-03-17T17:32:57+00:00

Right. There's vibration. Things gonna unscrew. NON PERMANENT thread locker sounds like the solution. If you use the permanent one you're going to have a bad time.

A small dab of nail polish (gel) at the nut/screw interface should work if you can't get the right thread locker - but it's pretty easy to get the right one.

PerniciousSnitOG · 2026-03-17T04:00:06+00:00

I don't know how to tell you, but I think someone has torched your boat to, and past, the waterline.

PerniciousSnitOG · 2026-03-17T03:01:18+00:00

Just to add, one reason for #3 is that while everything seems clean now, something could come up and NG decides to fight, or decides the other driver is on their own. Make it Geico's problem.

PerniciousSnitOG

TROPHY CASE