Hold down clamps, what do you use?

[Hi-Spec]

they do the job, we still use this style in my workshop on a daily basis although the studs break with the constant use

[HankMcSpank]

I mainly mill copper fr4....for clamps I just use ali strips ....about the same length as the copper board (therefore 160mm long) and about 40mm wide (the ali is 3mm thick). So basically one long clamp either side of the copper board...I have my CNCUSB tool sensor wire permanently connected to one of these clamps...& becuase it is ali, when I clamp the board down it makes electrical contact with the copper FR4 surface - which means I can then use the FR4 copper surface itself to touch off for Z auto tool zeroing.

[JAZZCNC]

I made these simple longish slimline clamps from scrap 10mm Ali plate, they work well and allow for some akward positions.
I can also use them in different ways for either single material clamping or if I need or want to cut a few jobs at same time from differant materials pieces using offsets, like for small jobs out of offcuts.!

I also have some stupidly expensive Swedish Kopal clamps that I use for things like surfacing jobs due to the way they clamp the sides of material.

The pics should give you an idea, they are just for show purposes here but it's not unusal for me to use similiar setups while working and setup some work offsets,G54 G55 etc then combine the code for several jobs in one G-code file set it off and walk away. Thats the beauty using work offsets with small jobs and a large bed.