Simple filter cyclone to do with a CNC milling machine. You will need: I built this filter to my CNC machine, dust was collected in an industrial vacuum cleaner which unfortunately fairly quickly filled. The filter is attached to a steel barrel with a capacity of 60l (needed the extra cover - is not in the files). Now the dust and debris getting into the barrel and the vacuum cleaner is clean.We start from the cuting parts from plywood. The gray parts of the file must be offset depending on the diameter of the milling cutter magenta / pink line - a single groove depth of 3-4 mm blue - inside pocket - depth 3-4mm Cut parts are to be joined with screws. The lower part (6-bolt holes) combine with three brackets. Press the bracket in the pocket, set of holes for the screws, put the nut in a wider place in the bracket and screw in the screw. Repeat for all three brackets. For now, do not screw the top. Now PET - our cyclone. After you cut (but before bonding) we must make sure that it will fit into the "case" we made. Wrap the cyclone and glue it temporarily with tape from the outside. After inserting into the casing adjust shape and mark the end of a line of PET with the marker. Pull out and straighten PET. Glue double-sided adhesive tape on half of PET (the template file marked in a darker color). Now the hardest-remove paper from the tape and glue cyclone. Remember to glue it to the previously marked line. Clamping might be necessary. External joint (that with marked line) glue using hotglue (Becareful not to overheat the PET it might change shape!) Next from PVC pipe cut off about 230mm (part without the cup) and glue the printed template. Carefully, using a Dremel cut off the pipe on the line. We have all the elements we need only connect them. After inserting the PET to the housing, set it (rotate) in such a way that the narrower end of the hole outline was 10mm from the bracket. Check to see if it matches the upper part (the screw can be joined to the test). If everything fits, stick with hotglue the cyclone to the brackets and the bottom of the case. NOT to the UPPER part! Top must be removable. Glued and joined with bolts cyclone we can cut a hole in the side using a dremel. Carefully, the hole is tighter suited for PVC pipe, the better. Set the pipe in the hole so that it equally overhanging from the inside of the cyclone for 1-2mm (normally it should be smooth and not stick out but I know from experience that otherwise PET is delaminating) glue it together with hotglue. When it is set and glue is cooled, add a second layer of glue - we want it to be sealed. Now glue the second piece of PVC pipe in the upper part, slide it to the end, so that it relied on the cup. Excuse my English, I try the best I can :) If something is not clear, I'm happy to describe it accurately.