I know that it is important to have a good ground, and that it has been suggested to clamp to the material vs the slats. Unless your material hangs over the edge, clamping to the material tends to cause it to lift up (as well as having your clamp submersed into the cutting fluid). Recently I switched over to a magnetic ground clamp, which I clear a spot of shiny metal with a flap disc. I haven’t added it to my ground cable, but instead clamp the ground to the lugs (allows me to use it with my plasma cutter and welders, without having to buy multiples). Keeps the material nice and flat. Anyone else using a magnetic ground clamp?
You can put a strip of steel under the alu/ss between the slats and the magnet “clamp” on top - that will lock the magnet to the alu/ss and give you a ground. Or do like people with new induction ranges but old aluminum pans do - put a steel plate under the magnet on top of the project plate. It might slip but you’ll still have contact with the workpiece for current flow.
