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  • I've stood alls I can stand I cain't stands no more!

    After buying many SR44 batteries for the digital calipers I finally put an end to the routine of changing batteries so often.

    This is an AAA and should get me a little better service. I suppose you guys down in Houston and the Florida Keyes don't have this problem but up here in the frozen territories these little batteries get the life sucked right out of them. If this don't work much better the next one will be D Cell.

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    Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.

    It is true, there is nothing free about freedom, don't be so quick to give it away.

  • #2
    I'm presuming that you will dress the leadwire or somehow tie it off to avoid snagging it on something.

    Why not machine a button cell-like contact? A brass ring shaped like the shell of the battery with a hole through the back for wire passage, a nylon insulator, and a brass central contact button with a stem to solder a wire onto.

    Notch the cover to let the wire out through.

    Two conductors from a piece of ribbon cable becomes a mini 'zip cord' that would be less prone to snagging.

    I like your battery holder.
    Weston Bye - Author, The Mechatronist column, Digital Machinist magazine
    ~Practitioner of the Electromechanical Arts~

    Comment


    • #3
      Battery pack.

      Originally posted by Your Old Dog
      After buying many SR44 batteries for the digital calipers I finally put an end to the routine of changing batteries so often.

      This is an AAA and should get me a little better service. I suppose you guys down in Houston and the Florida Keyes don't have this problem but up here in the frozen territories these little batteries get the life sucked right out of them. If this don't work much better the next one will be D Cell.

      http://bbs.homeshopmachinist.net/http://inlinethumb27.webshots.com/6938/2286974550102651310S600x600Q85.jpg

      http://inlinethumb20.webshots.com/8659/2407649610102651310S600x600Q85.jpg
      Thanks YOD.

      Too good.

      Too true.

      Too obvious.

      Too late.

      Bu**er it.

      I guess we've all had that problem - I've heard about it and had it happen often enough, but this is the first, best and easiest solution that I've seen.

      And its so bl**dy obvious once you pointed it out.

      I've lost at least 2 digital devices - calipers and protractor - through leaking batteries (NOT the cheapies either!!).

      I take the batteries out of each battery-powered device/tool I have in the shop after I've finished with it. I test the batteries ("Tandy" tool/tester) before I put the battery in before each use.

      PITA - but its the only way - until this.

      This really is one of those "banging open palm of hand on forehead and "Sh*t yeah"" items/moments.

      Is getting swarf or coolant or Shop gunk into the battery holder a problem?

      Comment


      • #4
        they should bring them out with solar panels on them ..like the calculators

        problem solved then .

        all the best.markj

        PS ...i also think they should bring out an extra beefy version ,...perhaps 8MM thick

        with micrometre anvil pads or what ever they are called, on it.
        Last edited by aboard_epsilon; 02-10-2008, 07:39 PM.

        Comment


        • #5
          Originally posted by aboard_epsilon
          theyt should bring them out with solar panels on them ..like the calculators

          problem solved then .

          all the best.markj
          Ain't that the truth!


          Actually the wires are now dressed and a small hole drilled to run the wires through so I could put the battery cover back on it. That photo was just to show guys it is possible to solder in the small space.
          - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
          Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.

          It is true, there is nothing free about freedom, don't be so quick to give it away.

          Comment


          • #6
            Originally posted by Wes1
            ......Two conductors from a piece of ribbon cable becomes a mini 'zip cord' that would be less prone to snagging.......
            Is that multistrand? I'm using 22 or 28 gauge single strand, that's why all the extra wire so that it might last a little longer with the lazy bends in it.
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            Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.

            It is true, there is nothing free about freedom, don't be so quick to give it away.

            Comment


            • #7
              Originally posted by Your Old Dog
              Is that multistrand? I'm using 22 or 28 gauge single strand, that's why all the extra wire so that it might last a little longer with the lazy bends in it.
              Yeah, the ribbon cable,- the grey 'ribbons' inside a computer connecting the drives to the motherboard - contain multiple conductors. Each conductor is around #26-28 seven-strand wire. Stranded is generally more flexible than solid.

              Two strands can be 'zipped' off the edge of an unused ribbon cable. care is needed soldering, and some sort of strain relief is a must, as the wires break most often right at the solder margin.
              Weston Bye - Author, The Mechatronist column, Digital Machinist magazine
              ~Practitioner of the Electromechanical Arts~

              Comment


              • #8
                Solar, I had one,not enough light in the shop to keep it alive.

                Comment


                • #9
                  Yep, solar didnt cut it at my house either...

                  I had a little solar powered calculator I keep on the workbench and it gave me fits, til I got like Dog (had had enough!) and replaced with a battery model --- which I had to try 2-3 places to find --- they seem to ALL be solar.

                  I've got what looks like the same DRO, --which I can never seem to remember to turn off!-- , but I still get quite a good life out of... maybe 5-6months? Course I AM down here in the South...

                  Speaking of batteries, I prowled ebay for them and bought 50, yes FIFTY, for a PENNY ...so youre saying, yeah but what was the frt, well, even at $9.99 is was still a bargain, 50 batteries for $10, .....and those are the ones I get the 5-6mo life from.
                  If everything seems to be going well, you have obviously overlooked something........

                  Comment


                  • #10
                    brockley1

                    Cold? you guys in ny have no idea. try a visit to Alberta today, -40, with wind chill -55
                    The difficult done right away. the impossible takes a little time.

                    Comment


                    • #11
                      Disclaimer: I've never bought from these guys, but their prices are better than local one-off purchases: http://www.sr44.com

                      My Mitutoyo 'Z' readout has had the battery replaced once or maybe twice in the 10 years I've owned it. Even my $20.00 caliper goes a year or more on a battery. Now, the Mitutoyo digital mike seems a bit more power hungry, but the 'AAA' Solution wouldn't work for that.

                      Didn't that long thread on digital calipers talk about battery life? Some of the cheapys don't really turn 'off', even when they say they're 'off'. Actually, I never turn the 'Z' readout on my mill to 'off' anyway.

                      Comment


                      • #12
                        Hey Wes, thanks for the tip. I got a bunch of those ribbon cables from old compukers. I'll see if that don't work better.

                        If I could have gotten 50 of those SR44 batteries for $10 bucks I wouldn't be complaining as much. $10.00 will get me 3 of them at the drug store. I don't think Radio Shack is any different.

                        Someone here sometime ago said they actually bought some little led flashlights just to get the batteries for something else!
                        - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                        Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.

                        It is true, there is nothing free about freedom, don't be so quick to give it away.

                        Comment


                        • #13
                          Originally posted by brockley1
                          Cold? you guys in ny have no idea. try a visit to Alberta today, -40, with wind chill -55
                          Yea, that's why I thought they should of given that part of the world to the Indians......................if they'd have it












                          JUST KIDDING !!
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                          Thank you to our families of soldiers, many of whom have given so much more then the rest of us for the Freedom we enjoy.

                          It is true, there is nothing free about freedom, don't be so quick to give it away.

                          Comment


                          • #14
                            YOUR OLD DOG their are a set on E-Bay But you might have to fight me for them .
                            Every Mans Work Is A Portrait of Him Self
                            http://sites.google.com/site/machinistsite/TWO-BUDDIES
                            http://s178.photobucket.com/user/lan...?sort=3&page=1

                            Comment


                            • #15
                              Nice solution- done that myself with the clock in the van, the mp3 music player in the van, and one of my old voltmeters-

                              I figured that a D cell would have more output than a C cell, so in one case I opted for that. Then I discovers that the D is a C inside- if the D don't weigh almost twice as much as a C, you don't get any more bang for the extra buck.

                              Anyway, I get more than six months out of the mp3 player now, whereas I was getting about three weeks before on the pair of aa's. The clock will run for two years, and the voltmeter still has that same alkaline that I adapted to it.

                              I was in Costco the other day and saw a package of 'precharged' nmh cells. Part of the pack was a pair of D cell adapters to allow the use of the AA in something meant for the D cell. Same for the C size- why can't we buy the nmh cells sized to suit? Check out the C's and D's in the stores- they are AA's inside and don't weigh hardly any more than the AA's.

                              Don't bother with a D cell maglight unless you can get military batteries- they are, or at least used to be real D sized alkalines, with D sized innards.

                              At any rate, here's an idea- why not make an led ring light for the mill, then tap some power from the adapter to micro-trickle charge the alkaline being used for the caliper- or just run the caliper direct from the adapter with a simple two part circuit -
                              I seldom do anything within the scope of logical reason and calculated cost/benefit, etc- I'm following my passion-

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