Sieg X2 Spindle/Drawbar cap

thingiverse

I picked up an LED tachometer equipped with a hall effects sensor to use on my mini mill, and needed to mount the sensor in the drawbar cap. Rather than drilling a hole in the OEM cap, I decided to take control by creating a custom cap that included a precisely sized hole at the location where I believed it would work best. I positioned the magnet at the bottom of the drawbar hex, leveraging its central location to ensure stability even at maximum rpm without requiring any adhesive. The sensor effortlessly clears the spindle mounting nut and accurately captures the RPM, leaving me thoroughly satisfied with the setup. To assist others in replicating this solution, I'm including a downloadable .fcstd file that can be modified to suit individual applications. After experimenting with various ring/slice combinations of different diameters, I finally achieved a snug fit, which I highly recommend doing to avoid wasting filament and ensure optimal results.