I present a description of a small vacuum chuck that I made for holding pieces of PCB for isolation milling as well as pieces for engraving.
Click thumbnails for full size.
Above we have a couple of test examples. The milling was done with a small D bit in a high speed spindle clamped to the quill.
I have put a 20 minute video on Youtube
In that I describe the manufacture of the chuck as well as discuss the vacuum needed and ways to get it. The process of milling some pieces is also shown. Don't forget to like, share and subscribe to the video channel to ensure notice of forthcoming videos.
In the meantime here are a few stills.
Bob Warfield has posted an interesting article on vacuum workholding aimed at CNC routers which can be found at:
There was a recent post on this forum about using fridge motors for vacuum pumps http://www.homemadetools.net/forum/h...uum-pump-71121