When you're into DIY electronics and you want to create your own PCBs with your CNC machine, you need the right clamps that keep the PCB level and protect your T-slot bed from being drilled into. I created these on the basis of ideas I got from Youtube to protect your T-slot bed in this way. The clamps slide through the slots on your T-slot bed. Depending on the margin and the settings on your printer, this may be a tight fit, nothing that a bit of sanding cannot solve.

Additional components

You only need 4 hex bolts M5x16, 4 M5 washers, and 4 M5 T-nuts. If you got a CNC3018 or similar from E-bay or any other e-commerce company, chances are they're already included. The bolts can be pushed into the knobs with some gentle persuasion of a hammer, if necessary you can add some glue.

Print settings

Nothing special, I used PLA, 0.2 layer thickness, 25% fill and 2 walls. There is not going to be a whole lot of tension on the clamps.