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  • Static Electricty conductor wire cause clogging

    For the first time in 15 years I am having an issue with blockages in the 4”ducting of my dust collection system. This set-up has been in place for 15+ years and has worked very well with no issues.
    I recently started a project using ¾” pine laminated shelving and have been planing 2 ft lengths of 9” width. The high volume of shavings have been snagging in the copper line running in both the 4” rigid collector tube as well as the flexible grey spiral connection to the planer. The copper line is the anti-static earthing conductor and runs on the inside of the pipes.
    The collector is a Delta 50-760 with 1200cfm capacity and the tubing runs are short resulting in high velocities. Problem seems to be that the planer shavings are 3” + long (softwood) and snag at he point where the wire exits the pipe at the couplings. The system clogs up pretty quickly and shavings start flying from the in-feed side of the planer. Static electricity is an issue over the winter months here on the Prairies.
    I am looking for an alternative to running the anti-static lines inside the collector tubing. Any suggestions will be much appreciated – unclogging collector lines is not my favorite pastime!
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  • #2

    Re: Static Electricty conductor wire cause clogging

    if I understand it, you're using pvc/plastic ducting?
    if so, would moving the wire to the outside of the pipe BUT adding some self tapping screws through the ducting so they poke out into the air stream? then attach the screws to the grounding wire.


    no experience with it, just thinking outloud.
    [insert something witty here]

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    • #3

      Re: Static Electricty conductor wire cause clogging

      Beakie's suggestion is one of the methods. For a more definitive explanation of the situation have a look at Rod Cole's treatise on the subject. Anyway, the wire inside the pipe is the problem and needs to be removed.
      http://www.woodcentral.com/articles/...cles_221.shtml

      billh

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      • #4

        Re: Static Electricty conductor wire cause clogging

        Thanks beakie and billh for your responses. I have read the article that billh referenced and it makes for very interesting reading, thanks for that. It seems I need to pay much more attention to emptying my dustbag and to stop being lazy and occasionally using the dust collector to do a quick cleanup around the planer where it can pickup a metalic object!

        Comment


        • #5

          Re: Static Electricty conductor wire cause clogging

          If said metal object has been on the floor for any length of time it is likely cooled enough that it won't start a fire.
          "Do it Right!"

          Comment


          • #6

            Re: Static Electricty conductor wire cause clogging

            Originally posted by beakie View Post
            if I understand it, you're using pvc/plastic ducting?
            if so, would moving the wire to the outside of the pipe BUT adding some self tapping screws through the ducting so they poke out into the air stream? then attach the screws to the grounding wire.


            no experience with it, just thinking outloud.
            I did exactly as you stated 30 years ago at my precious location. 4” PVC piping with 18 gauge stranded copper wire, attached to a 3/4” screw every 3-4 feet. It never clogged and I never had a static problem. The wire was attached to all the tools on the system.

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            • Thread Continues Below...

            • #7

              Re: Static Electricty conductor wire cause clogging

              Originally posted by Pietercape View Post
              For the first time in 15 years I am having an issue with blockages in the 4”ducting of my dust collection system. This set-up has been in place for 15+ years and has worked very well with no issues.
              I recently started a project using ¾” pine laminated shelving and have been planing 2 ft lengths of 9” width. The high volume of shavings have been snagging in the copper line running in both the 4” rigid collector tube as well as the flexible grey spiral connection to the planer. The copper line is the anti-static earthing conductor and runs on the inside of the pipes.
              The collector is a Delta 50-760 with 1200cfm capacity and the tubing runs are short resulting in high velocities. Problem seems to be that the planer shavings are 3” + long (softwood) and snag at he point where the wire exits the pipe at the couplings. The system clogs up pretty quickly and shavings start flying from the in-feed side of the planer. Static electricity is an issue over the winter months here on the Prairies.
              I am looking for an alternative to running the anti-static lines inside the collector tubing. Any suggestions will be much appreciated – unclogging collector lines is not my favorite pastime!
              Switch to metal ducting and increase the duct diameter, 4 inch is pretty small for a machine.....Regards, Rod
              Work is the curse of the riding class.

              Comment


              • #8

                Re: Static Electricty conductor wire cause clogging

                I use 4" PVC ducting in my basement shop. The dust collector is an old CTC elcheapo unit. The ducting is not grounded anywhere.
                I use self-cleaning blast gates at every machine. I have never had any issue with static electricity.
                ????????????????,
                Cheers,

                Tim

                Comment


                • #9

                  Re: Static Electricty conductor wire cause clogging

                  Originally posted by big tim View Post
                  I use 4" PVC ducting in my basement shop. The dust collector is an old CTC elcheapo unit. The ducting is not grounded anywhere.
                  I use self-cleaning blast gates at every machine. I have never had any issue with static electricity.
                  ????????????????,
                  Cheers,

                  Tim
                  The only issue had Tim was that if I bent over to pick something up from the planer my head would be close to the plastic hose.

                  It’s rather disconcerting to have your noggin act as the ground electrode, so I changed that to a piece of aluminum flex.

                  Regards, Rod.
                  Work is the curse of the riding class.

                  Comment


                  • #10

                    Re: Static Electricty conductor wire cause clogging

                    Originally posted by Pietercape View Post
                    Thanks beakie and billh for your responses. I have read the article that billh referenced and it makes for very interesting reading, thanks for that. It seems I need to pay much more attention to emptying my dustbag and to stop being lazy and occasionally using the dust collector to do a quick cleanup around the planer where it can pickup a metalic object!
                    attach rare earth magnets to you floor attachment and they will pick up the metal objects for you. Jack posted something about that awhile ago.
                    Jerome
                    Canada's South Coast

                    Port Colborne On.
                    Every loaf of bread is a tragic tale of grains that could've become whiskey.......but didn't....

                    Comment


                    • #11

                      Re: Static Electricty conductor wire cause clogging

                      Many thanks to all who responded - I think I am going to follow the suggestions by beakie and Mike to place the conductor on the outside with self-tapping screws. Better safe than sorry.

                      Comment

                      • Thread Continues Below...

                      • #12

                        Re: Static Electricty conductor wire cause clogging

                        Many years ago i was cutting a roll of plastic that was stretched over some abs pipe and just as I sliced it from underneath I got that shot Rod mentions right on the top of my head and it was a beauty. I jumped and at the same exact second sliced a 5 stitch cut in my thumb. The shock to my mellon was worse than the cut. Thanks for the memories Rod!
                        "Do it Right!"

                        Comment


                        • #13

                          Re: Static Electricty conductor wire cause clogging

                          I use 4 inch flexible plastic hose which I move from one appliance to another. It has a spring steel coil incorporated in it to hold it open. When I first started to use it I got some very unpleasant shocks on touching it. Solved the problem by loosely wrapping a copper wire around the outside, grounded to the fan unit. Never any internal dust collection problem.
                          Glenn

                          Comment


                          • #14

                            Re: Static Electricty conductor wire cause clogging

                            Originally posted by Glenn at Raven View Post
                            I use 4 inch flexible plastic hose which I move from one appliance to another. It has a spring steel coil incorporated in it to hold it open. When I first started to use it I got some very unpleasant shocks on touching it. Solved the problem by loosely wrapping a copper wire around the outside, grounded to the fan unit. Never any internal dust collection problem.
                            Glenn
                            Hi Glenn, the flex hose in my shop has the spiral wire grounded at the collector end, reduces static charge on the hose.....Rod.
                            Work is the curse of the riding class.

                            Comment


                            • #15

                              Re: Static Electricty conductor wire cause clogging

                              Originally posted by Rusty View Post
                              If said metal object has been on the floor for any length of time it is likely cooled enough that it won't start a fire.
                              The issue is whether the spark is buried in a dust pile and left to smolder, eventually igniting into flames. The other hazard with metal objects is if they are small enough to be sucked into the DC, they can hit the impeller and create a spark.
                              Cheers
                              Randy

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