For those of you with FDM printers out there, what do you do about that last few feet of filament on the spool? My printer has a habit of forgetting to stop when it runs out of filament. This wastes more filament than just throwing away the end of the spool but I feel like there's got to be a better way.
We fused copper wire together in the wire mill I worked at that made the wiring harnesses in vehicles. It was done with resistance welding. I tried using a soft flame lighter the other day to fuse two ends of PLA together. It worked but they were crooked. That made a headache but has anybody ever seen anything that can do this straight and reliably?