Printed Mechanical Bottom Feeder Mod

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BobC

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    Not "just to keep it working". To keep it running the way it should. I have been using Pekos for a while now. This is how I roll. I think what you're missing is that some people wanted less maintenance, so they asked for some advice on how. Hench the plethora of posts.

    Running as I do with dual 5/64id 29g 6 wrap 1.35r coils (tensioned to adhesion) for a total of 0.7r, I can say no. There is no blackening. But brass tarnishes. There is a BIG difference in a well maintained mod (of any type) as opposed to a poorly maintained one.



    Fortune favors the Bottom Feeders.

    I get that, and I guess what I was saying, is maintenance shouldn't be a major task,

    first, make sure you use an oxidation ......ant (De-Oxit Gold) after cleanings
    secondly, make sure you have no play on the negative contact, to reduce arching,

    It should take minutes a week, to clean exposed areas
     

    Alexander Mundy

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      I replaced the brass rod with a piece of 10 gauge bare copper, and the upper with a super flexible silicone (don't remember the size), magnets instead of spring, used the old style Reo 510 center pin, and made silver plated beryllium copper contacts for the 510 connections when I built my Beta and have never had it apart since the modifications done before the V1 was released except removed the top cap once to paint it. I run .7 ohms daily in a very hostile environment at work. About every 2 weeks I thoroughly clean it with hot water and let it dry. No muss no fuss and still extremely low voltage drop.

      2014-09-05%2018.03.37_zpsnz0liwsv.jpg
       

      muzichead

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        I've been running my 18650 since early January, I believe, and have never had to take it apart for anything to this day, with exception of loosening the 510 when changing atty's on it). I have run .3Ω regularly in it since day 1 and on occasion as low as .23Ω. The only maintenance I have had to do on it is clean the positive contact screw with an eraser and apply De-ox-it, maybe once every 45-60 days. Though it is not my ADV everyday, it is my ADV during the summer months when I'm landscaping 5-6 days a week. It shares vape time with my 26650 and 2 REO's most of the time otherwise. When I first got it I was vaping 3mg but since June/July I have been vaping 0mg with hardly a notice of missing the nic...
         

        Aal_

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          So I cleaned the negative screw and place a 4.13V charged hg2. Voltage is 3.57V with a 0.315 ohm coil. Which means drop is 0.56V which makes the resistance of mod plus battery at 0.049 not accounting for initial sag. Hg2 is at 0.02 ohms so resistance of mod is at 0.029 which is with the best mods I have.

          TL;DR no need to do full disassembly and clean, never did since day 1 and still hits more than any other mod i have.
           

          Tagi

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            I got all the soldering finished and was putting it back together. Everything together and I noticed the button pin was sticking out a little to far. Started adjusting it and realized something was not right. The nut had popped loose, and then my magnet did too. lol... Its drying now, I am ready to get it back running but will have to wait for the epoxy to cure. Once it does I will post pics.
             
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            Moxienator

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              I got all the soldering finished and was putting it back together. Everything together and I noticed the button pin was sticking out a little to far. Started adjusting it and realized something was not right. The nut had popped loose, and then my magnet did too. lol... Its drying now, I am ready to get it back running but will have to wait for the epoxy to cure. Once it does I will post pics.

              I ended up using the heavy spring on all my Pekos due to the wire mods being so flexible. That throw is going to be LIGHT!!!


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              Aal_

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                Hmmmm, that sounds too severe to be just a contact arc, I never get black on my firing pin screw, something is loose somewhere
                Not sure if it's because of the 0.3 ohms, but there is nothing loose. I have pitting on my 4 pekos. If anyone knows of a way to stop the pitting i would be more than happy :)
                 

                Moxienator

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                  Not sure if it's because of the 0.3 ohms, but there is nothing loose. I have pitting on my 4 pekos. If anyone knows of a way to stop the pitting i would be more than happy :)
                  I run at 0.7 with clean contacts on 2 pekos. No pitting. :unsure:

                  If everything is tight, maybe it is due to the low resistance. There is not a lot of mass to conduct the current. Do your contacts get hot?



                  Fortune favors the Bottom Feeders.
                   

                  Aal_

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                    I run at 0.7 with clean contacts on 2 pekos. No pitting. :unsure:

                    If everything is tight, maybe it is due to the low resistance. There is not a lot of mass to conduct the current. Do your contacts get hot?



                    Fortune favors the Bottom Feeders.

                    No hot contacts. From the voltage drop everything seems in order. Weird. I thought pitting was normal :ohmy:.

                    Remember guys I don't have any mod on the mod. So the negative screw goes at an angle and the contact point is really small. Plus I don't think the contact point is smooth. I will try to take a picture later on to show the black spots.
                     

                    Moxienator

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                      No hot contacts. From the voltage drop everything seems in order. Weird. I thought pitting was normal :ohmy:.

                      Remember guys I don't have any mod on the mod. So the negative screw goes at an angle and the contact point is really small. Plus I don't think the contact point is smooth. I will try to take a picture later on to show the black spots.
                      Ah. Yeah, I never really liked that angled button throw. When I made the solid switch arm, I tried to curve the arm so the button would travel straight. Tough to do...

                      Fortune favors the Bottom Feeders.
                       

                      Aal_

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                        Ah. Yeah, I never really liked that angled button throw. When I made the solid switch arm, I tried to curve the arm so the button would travel straight. Tough to do...

                        Fortune favors the Bottom Feeders.

                        Well I think that pitting would happen anyway unless maybe I use noalox. Deoxit doesn't seem to prevent it. We are talking about 11-12 amps through a small contact point. I'm sure that's the problem.

                        Pdib moved from breaking contact with the battery in the pinch design because of pitting. So i think it is inevitable until I find a way to increase contact point.

                        If George is reading this I would love a suggestion :)
                         
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