Une curiosité mécanique : le point de bâti sur Bernina Record 930

Among the many mechanical subtleties found on a sewing machine, one deserves particular attention: the dual type of basting stitch, directly selectable via a switch on the Bernina Record 930 and its siblings (here, a 931). On this machine, the stitch is not simply a consequence of the overall movement, but the result of a deliberate mechanical choice. In addition to its standard operation, the stitch formation can be modified by a dedicated cam, which is engaged or disengaged by a release lever. In practical terms, this device allows for an instant switch from a standard stitch to an alternating stitch—for example, one stitch out of two or one out of four—without disassembly or external accessories, simply by operating a lever. This principle is particularly interesting because it illustrates an era when mechanics served as the user interface. Here, there are no electronics, no programming: everything is visible, understandable, and logical. The disengagement finger mechanically enables or blocks the action of the cam, thus modifying the movement transmitted to the needle and therefore the very structure of the stitch. From a technical point of view, the system is elegant. This mechanical ingenuity is a reminder of why the Bernina Record 930 is still so highly regarded today: it is intelligently designed. A fine example of well-thought-out, clear, and efficient mechanics. 🔍 On the agenda: ⏳ 00:00 – Introduction: presentation of the Bernina 931 and the basting stitch. ⚙️ 01:28 – A set of special cams ⚙️ 04:17 – The influence of the cams on the needle bar 🎞️ 07:48 – So, what does the basting stitch actually look like? 🧵 13:10 – Conclusion To learn more:    • Bernina Record 930 sewing machine + instru...   https://www.reddit.com/r/sewhelp/comm... 🔸Join me on social media!🔸 ➜ Facebook:   / filmecanique   ➜ Instagram:   / fil_mecanique   ➜ Our website: https://www.fil-mecanique.com 🎞 Editing:    / @super-viii   🔔 Subscribe to the channel, comment, and share the video! #Bernina #sewingmachine #curiosity