You'd need to get a frame casting, set up indicators, then do some pushing, twisting, and leaning on it to see how much it moves.
What could stiffen it is filling all its internal space with epoxy. The upper casting from one of these https://china-highly.en.made-in-china.com/product/gSHxMeWyblRA/China-Hl-246-Long-Arm-Compound-Feeding-Super-Heavy-Sewing-Machine.html could do the job since it bolts on from above it could be mounted over any XY base you can build. Just might be workable for a wood router for sign carving. Z travel would be limited to whatever vertical slide you mount, and if you space the arm up higher. I'd expect that the really long ones with arms around 30 inches, would be pretty well vibration damped in order to handle high speed sewing in heavy materials like canvas. Sewing is mostly a short vertical motion. I'd assume the main area of concern for adapting a long arm sewing machine to routing would be resistance to bending sideways and twisting around the long axis of the arm. On Saturday, May 20, 2023 at 11:00:22 AM MDT, Thomas J Powderly <tjt...@gmail.com> wrote: I saw an overarm router recently and wondered if a sewing machine frame was stiff. Compared to a desktop gantry mill. I imagined a makita router mounted on the over arm minimal Z travel ( 150mm at most) I can find castings for industrial machines pretty cheap in qty 1 What i see are C frames, single casting, with base plate as long as over arm. Any thoughts? ( I don't have a sewing machine to lean on ;-) _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
