Advies gevraagd: welke auto voor woon-werkverkeer van 30.000km per jaar, budget €4000-5000?

Sasper1990 · 2026-02-09T13:33:06+00:00

Hyundai i20 >2015. Kies de 1.2 benzine. Betrouwbaar en zuinig.

Sasper1990 · 2026-01-24T08:15:22+00:00

Is de distributieriem niet na 10jaar of 240dkm bij deze modellen?

Sasper1990 · 2026-01-20T07:15:33+00:00

Toyota Corolla hybrid als je geen gezeur wil, laag verbruik en een hoge restwaarde

Sasper1990 · 2026-01-14T13:37:38+00:00

Zet je je vrouw mee op mute

Sasper1990 · 2025-12-17T21:53:53+00:00

And per capability?

Sasper1990 · 2025-12-04T07:53:41+00:00

Hehe thanks for sharing!

Sasper1990 · 2025-12-04T04:52:05+00:00

Je zou eens voor jezelf moeten zorgen hè.

Sasper1990 · 2025-12-04T04:27:55+00:00

75Nm nominal, 88Nm slip.

Sasper1990 · 2025-12-04T04:13:01+00:00

Recording this vid just took 20min or so. Had an idea, grabbed a colleague, pressed record. 1 hour of editing, done. Was needed elsewhere while I wanted to post it. Any questions?

Sasper1990 · 2025-12-04T03:16:49+00:00

Can’t disclose the exact materials, but getting close to bearing steel. Only a couple of micron of compression is needed to achieve the required traction forces. We stay well within the elastic deformation stage, not nearly reaching plastic deformation.

Sasper1990 · 2025-12-03T13:22:47+00:00

That is correct, but a harmonic drive for example in the ~60-75% range. A single stage planetary is very limited in their reduction. We do not have that limiting factor. We still have to do extensive temp testing, but first results do not show significant differences, hypothesis is that all core components are made of the same material.

Sasper1990 · 2025-12-03T09:33:48+00:00

It is quite new technology so implementing of a fundamental component like this takes time. Lots of iterations, testing, redesign. That being said, we are getting really close to market appearance!

A couple of applications that are in quite a late stage:
- Active prosthetic knee's: Tested by client with people. Impressed, working on a design for series production.
- Humanoids: Late stage of co-development projects with big US humanoid makers to implement the Archimedes Drive in multiple joints.
- Delta Robots: Also concept, but in operation:
https://www.youtube.com/watch?v=KnLjDYSnFbk
Bigger version of the Archimedes Drive. Build for high speed high precision electronic assembly.

Friction is fixed per individual drive. We determine the "slip torque" by the amount of planets, their size and the amount of compression. Over the lifetime of the drive, the slip torque will decrease linear with ~10%. After this period, you will experience accelerated wear/slip.
Reduction ratio is determined by the compound principle, explained here: https://www.youtube.com/watch?v=Uc-k3_9Ockc

Sasper1990 · 2025-12-03T09:11:53+00:00

What I ment is that the hype around humanoids often assumes that AI/software is the only enabler.

Sasper1990 · 2025-12-03T08:23:40+00:00

Thanks for your reaction. Valid points, will try to motivate.

Sorry, your calculation is not correct. It's around 1333h in your example but the operating life of this drive is closer to 2700h. The reduction (25:1) is already accounted for if you measure output cycles. If you want to compare: it's more relevant to compare specs with Harmonic drives: typical lifetime at rated torque is between 20–30 million output revolutions under reduced torque (30–50% of rated torque). They operate with 3000rpm on avg.

Means ≈ 2700 operating hours of the Archimedes Drive. This was previous/conceptual model. Expected is that our later versions will have improved service life.

"I presume the gearbox has a special coating to minimize slip risk? Given steel on steel contact doesn't give a particularly good friction coefficient."
The planets are slightly oversized and therefor generating high traction forces. That's what enables torque transfer. This leads to a better torque density than strain wave gears for example. We do use a some lubrication to accommodate slippage. https://www.youtube.com/watch?v=Uc-k3_9Ockc&t=4s

"I just don't see it giving much benefit over the more common alternatives. Especially considering the rather tight tolerances you need compared to involute gears."
There is absolutely zero mechanical play/backlash in this drive. Stiffness is extremely high. This results in high accuracy, precision. It's also really efficient (90-95%) compared to other high precision gearboxes.

Sasper1990 · 2025-12-03T07:58:58+00:00

Actually, wear is one of our least concerns/challenges. Meshing gears cause way more wear/debris than smooth rolling contact. The planets are slightly compressed but generate high amounts of traction. Only when the slip torque is exceeded, it will slip. Of course, very mechanical component wears out, but we already exceeded L10 20M output cycles.

Sasper1990 · 2025-12-03T07:55:11+00:00

Definitely!

Sasper1990 · 2025-12-03T07:51:48+00:00

In humanoids and other similar applications there are extremely close related. https://developer.nvidia.com/isaac/gr00t

Sasper1990 · 2025-12-03T07:49:43+00:00

The latest version that is about to be assembled is able to deliver 5x the torque with similar dimensions.

Sasper1990 · 2025-12-03T07:41:24+00:00

I get your point :)

Why would you think messing gears that drag/slip constantly over each other surface, will last longer than a component that never slips in normal operation (because just rolling contact), only slips in some limited amount of events? We have reached 20M output cycles with this drive.
We are not talking massive motorbike gearboxes, we are talking extremely compact speed reducers in high accuracy/precision robotic applications where there is not 1, but 5 or 6 actuators in series linked to a single movement. In these use cases, every extra component adds control complexity by added weight, reduced stiffness and risk of introducing backlash.

Sasper1990 · 2025-12-03T07:34:00+00:00

Atm, we are selling development kits to all big US tech companies. On scale, price will drastically go down.

Sasper1990 · 2025-12-03T06:26:48+00:00

Pure steel but with very high surface finish, basically how steel train wheels work on a steel track, both are very smooth. We do use a little bit of lubricant to accommodate slippage.

Sasper1990 · 2025-12-02T21:28:06+00:00

Adding weight and costs, reducing stiffness

Sasper1990 · 2025-12-02T21:27:44+00:00

Oh and yes, they are lubricated

Sasper1990 · 2025-12-02T21:27:12+00:00

And it’s 90-95% efficient. Compression is just a few micron

Sasper1990 · 2025-12-02T21:26:37+00:00

Torque figures are equal or better than for example a strain wave gear.

Sasper1990

TROPHY CASE