How to achieve nanometer precision in space?

Why HN readers recommended it

Commenters repeatedly recommend it in JWST threads as a great explanation of clever mechanical design that is accurate and long lasting.

This is a summary from the source dataset, not an endorsement by Hacker News or the video creator.

Video & recommendation details

Creator / channel

Breaking Taps

Topic

precision mechanical design

Format

explainer

Level

intermediate

HN recommenders in dataset

4

HN mentions in dataset

6

Recommendation years in dataset

2022–2026

These counts and years describe the included Hacker News records; they are not YouTube views or the video’s publication date.

From the original HN conversations

Excerpts from the recorded comments. Follow each source for the full comment and surrounding discussion.

• The actuator is a genius flexure design that is both mechanically simple and accurate. Breaking Taps 3d-prints a working replica and describes the design. I highly recommend: [VIDEO] The actuator breaking wasn't as concerning after seeing the design.

• Here a nice video that explains the mechanism that aligns each mirror: [VIDEO] It is amazing that this is done with only a single motor. It works something like this: one direction of the motor sets which axis to align, the other direction sets the …

• This video [VIDEO] was posted here [LINK] about how the actuators work on the James Webb telescope. It's a great watch and shows how well thought out design can produce accurate and long lasting parts.