1st Cybertruck teardown video! … and it’s not Sandy Munro (by Caresoft instead)

[Cyberman]

"Caresoft has begun its benchmarking teardown of the Tesla Cybertruck and invited Autoline in to see the first stages of the process. Terry Woychowski, the president of the company, points out some of the highlights of the 4-wheel steer-by-wire system, the 48 volt connectors, the battery pack, the gigacastings and other castings that are used through the vehicle."



At the end of the day, first is first.

I'll take it. Good vid.

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[Dazureus]

I don't remember where I heard it (I've watched WAY too many CT videos) but I do remember the second steering motor is for redundancy if one fails. But (and again I can't remember where I heard this) the truck gives you a short mileage to pull over before it stops running. Like five miles or something, the intent being that you can't just drive around with one motor indefinitely, but it would be unsafe for the vehicle to suddenly stop.

I wouldn't be surprised if there were automated braking when both motors fail, like when Kyle from Out of Spec towed the CT faster than walking pace.

It was cool to see the force feedback motor. I was aware from other videos that it exists to provide road feel. I wonder how good it is, since a big complaint with electric power steering is lack of road feel as compared with hydraulic power steering. But theoretically if you are detecting road feel and pushing it through force feedback, you could make it as good as anything else out there. I don't know the practical limits of it though.

There are a few ways to provide redundancy in a single power pack power steering unit (EPS). From what I've heard, in Tesla legacy steering products, they have 2 ECU's controlling the EPS steering power pack, but only 1 is energizing the coils to the power pack at a time. The second ECU is redundant, should the first ECU fail. In products that I've worked on, both ECUs are active and communicating to each other and the CAN bus (depending on the OEM communication specs), and each is providing 50% assist to the power pack, so redundancy is provided by comparing information between the two ECUs and agreeing upon the amount of assist provided.

From that initial Munroe interview, Tesla said their SbW system has two power packs, each providing 50% required torque assist, but also each capable of providing 100% required torque, so physically, there's a redundancy. As mentioned ad nauseum, there's also redundant sensors, private CAN buses, etc. to provide data redundancy.

Road feel in a legacy EPS is mostly software controlled, or at least heavily modified. Where there's an intermediate shaft, a torsion bar, and all the linkages going from the hand wheel down to the steering rack and out to the tire rods and steering knuckles. You'll get some physical feedback and NVH. However, in an EPS system, the power pack can be programmed to reduce or negate NVH, steering pull from road or wind, tire wear, and other external forces on the road wheels. Likewise, with the physically disconnected SbW system, the handwheel actuator (steering wheel motor) can use those same road wheel inputs to provide road feel to the driver, completely software filtered, to remove unwanted road wheel feel while still providing some road wheel input. It's theoretically possible to provide any feel a driver or OEM would want through programmable calibrations, but the OEM will specify the steering feel they want for the vehicle they're producing. That feeling has to be appealing to the general market they're producing the vehicle for. Although the same steering rack will be used in a Ford F150 Raptor vs F150 XLT, the steering calibrations will provide a vastly different steer feel for a different audience.

 

[intimidator]

I live it.

Yes, I am a Sandy fan, but I think this tear down is very interesting and plan to follow it.

 

[Mini2nut]

The best part? No begging for money, sponsors or selling cheesy bottle openers to raise cash.

I am looking forward to future episodes.

 

[BannedByTMC]

I won't watch it I'm loyal to Munro.

Weird flex, denying yourself information when you can watch both.

 

[hridge2020]

Seems like there's a new Tear down Sheriff in town.
(View modified clip)

 

[rrolsbe]

18:45 they observed on their truck (other side that camera was on) that the rear door hing (w/scalloped out area) was incorrectly using the front door hing that didn't allow the 90 degree swing. Installers using wrong parts.

We have seen other reports of CTs having this problem.

Link to time in video where it was discussed:

If they did the opposite and mistakenly installed the hinges designed for the rear doors on the front, would they open 90 degrees or would something get damaged?

 

[Gigahorse]

Sandy has started putting out his videos, which is great that the competition has sped up the timeline, to long of a wait as it is.

Sandy did get a big win with his discovery of high voltage empty plugs that allows new versions of the CT to get more range via more battery modules.

 

[MorseCode]

I like that they coated the aluminum castings. I was very concerned about galvanic corrosion between the stainless steel parts and the aluminum castings and I hope that the fasteners between the two are somehow also electrically decoupled.

 

[BannedByTMC]

Sandy did get a big win with his discovery of high voltage empty plugs that allows new versions of the CT to get more range via more battery modules.

The only empty plugs I see are small conductors. They are high voltage but low power.

 

[CarMan ElecTruck]

I’m guess this has to do with “range extender” if they actually decide to go forward with it.. there were another interesting ‘blank’ I noticed under there as well

Sandy has started putting out his videos, which is great that the competition has sped up the timeline, to long of a wait as it is.

Sandy did get a big win with his discovery of high voltage empty plugs that allows new versions of the CT to get more range via more battery modules.

 

[hridge2020]

I like that they coated the aluminum castings. I was very concerned about galvanic corrosion between the stainless steel parts and the aluminum castings and I hope that the fasteners between the two are somehow also electrically decoupled.

September 23, 2021 --
https://www.cybertruckownersclub.co...ith-cybertruck-stainless-steel-material.3890/

I brought that same thing up back then, seem no one cared back then. Glad your bringing it up again.

 

[TexasRaider]

A few Munro videos are out now.

 

[MorseCode]

September 23, 2021 --
https://www.cybertruckownersclub.co...ith-cybertruck-stainless-steel-material.3890/

I brought that same thing up back then, seem no one cared back then. Glad your bringing it up again.

I design industrial equipment and work with aluminum and stainless steel in high voltage water cooled applications and deal with galvanic corrosion all the time. Since aluminum and stainless steel are so far away from each other on the galvanic scale there is a lot of degradation of the aluminum that occurs when any moisture is present to transport ions from the aluminum to the stainless steel. Just the act of grounding the stainless steel to the aluminum will cause any aluminum to stainless connections that are not properly coated to start to corrode with even the smallest amount of moisture between them. This makes surface prep, fastener material selection, water drainage, between contact points, and assembly procedures extremely important to limit corrosion.

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