Hi,
I've read all the threads on the DD and Ultimate DD, static issues, DIY or Ultimate, etc...
Here's what I did. My requirements are very specific, so this might not be for you, but I wanted to share these ideas as I've gotten so much input from this community.
I don't do a ton of work in my small basement shop, so I don't need a lot of DC capacity. So I went with the Mini CT. With all the concern about static and grounding, I thought "what would be a good, metal, CT Mini -sized box for the DD?" I realized that an ammo can would be perfect. I found this one for nothing at a local surplus store, but they are also all over Craig's List. One-piece metal, strong, and a gasketed, removable lid.
My grounding is rock solid, but pretty ugly, I admit. I had a lot of copper tape around. By the way, the place to get that stuff inexpensively is a stained glass supply house. In putting this together, I checked continuity between the Festool anti-static elements and found that if you use a simple continuity tester on that plastic, it appears not to conduct. But if you measure the resistance, it's about 5k ohms. There is a little metal finger on the CT inlet and that is connected to the ground pin of the AC plug. So I added copper to the inlet fitting (purchased from Woodcraft), ran a ground wire to the cyclone, did the Oneida copper tape thing, and my metal box is grounded. I get that 5k ohms from the tool to the ground pin of the plug.
So far this seems to be working well, but I just completed it, so I'll check in again with an update. Next steps will be to replace the bungee cord with a plywood plate notched to use the systainer attachment clips.
Best,
John
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I've read all the threads on the DD and Ultimate DD, static issues, DIY or Ultimate, etc...
Here's what I did. My requirements are very specific, so this might not be for you, but I wanted to share these ideas as I've gotten so much input from this community.
I don't do a ton of work in my small basement shop, so I don't need a lot of DC capacity. So I went with the Mini CT. With all the concern about static and grounding, I thought "what would be a good, metal, CT Mini -sized box for the DD?" I realized that an ammo can would be perfect. I found this one for nothing at a local surplus store, but they are also all over Craig's List. One-piece metal, strong, and a gasketed, removable lid.
My grounding is rock solid, but pretty ugly, I admit. I had a lot of copper tape around. By the way, the place to get that stuff inexpensively is a stained glass supply house. In putting this together, I checked continuity between the Festool anti-static elements and found that if you use a simple continuity tester on that plastic, it appears not to conduct. But if you measure the resistance, it's about 5k ohms. There is a little metal finger on the CT inlet and that is connected to the ground pin of the AC plug. So I added copper to the inlet fitting (purchased from Woodcraft), ran a ground wire to the cyclone, did the Oneida copper tape thing, and my metal box is grounded. I get that 5k ohms from the tool to the ground pin of the plug.
So far this seems to be working well, but I just completed it, so I'll check in again with an update. Next steps will be to replace the bungee cord with a plywood plate notched to use the systainer attachment clips.
Best,
John
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