We see a lot of CNC Machines here on Hackaday but not too ... The travel being so short allowed the final eBay auction price to be under $40. Just like the X Axis stock hardware, all of the ...

But entry-level CNC routers don’t often include a spindle tachometer, forcing the operator to basically guess at the speed. This DIY optical spindle tach aims to fix that, and has a few nice ...