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  • I have one of Pat's early ZX1. It's about 6 years old and I'd like to replace the power module, joystick and actuator.
    Where's a good place to buy the parts? Don't want used. Any other brand to look at? I have a programmer so won't be difficult to change out.

    My insurance bought me a new lithium unit. Big time difference from the SLA for distance. For those searching out the ZX-1, spend the extra and get the lithium.

    Comment


    • i agree. lithium is a must imo
      Bike-on.com rep
      John@bike-on.com
      c4/5 inc funtioning c6. 28 yrs post.
      sponsored handcycle racer

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      • Originally posted by fuentejps View Post
        i agree. lithium is a must imo
        Oh shit! I've screwed the pooch!#712

        I rigged up a little lift deal in the workshop which makes it so much easier to work on this thing. First I cleaned off all the crap from going mudding to the generator some time in the fall, last time I used the ZX-1.

        Before installing the new lead batteries, I charged all four with my new (appropriate) charger and load tested the lot using my ancient Sun 600A carbon-pile tester.
        One battery came with the machine 2 yrs ago, the second was a replacement when the original totally laid down in the spring.
        The other pair were brand new from VMAX Tanks, Pat's favorite source.
        I started at 50A and recorded voltage after 10s. All were between 10.0v and 10.6v
        Then 10s@100A: oldest, 8.4V, others, 9.1-9.6V
        Then I loaded to 150A and recorded voltage ASAP not wanting to tax the cells or straps: oldest 6.6V, 2nd oldest 8.4v, and the new pair, 8.6 and 8.4v

        IMO, I have three good batteries.

        I wonder about the motor specs in the photo. 24V, 3A max? 320W? At 320W/24V=13.33A Also, I've seen 38A currents on real steep full on assaults. Patterat? )surfing Motion Teck's site revealed nothing)

        Any day now, Julie and I will take "The High Current Hike" and try to determine the practical (hilly) range of this setup.
        And I'm already starting on a gantry to lift and swing the ZX-1 into the rear of Julie's R350 so we gan take it to places like NYC (once we're real clear how far it will go and how to predict that from the voltmeter I hung on it.)

        Even with the machine elevated, it's a PITA to get the batteries loaded and the velcro strap properly attached; both batteries want to fall to the sides unrestrained, so I made a little wooden support which fixed the problem, but revealed that what the batteries were horizontal, the frame of the machine above them was a little low, so I ground about 50 thou off the underside.
        Now the batteries socket snugly in their places leaving my hands free to deal with the Velcro, etc.
        I'll run this without the fiberglass cover. I don't see much need for it when the chair protects it from rain, and this leaves everything accessible including the lifting point.
        Attached Files
        Last edited by pfcs49; 04-05-2019, 03:19 PM.
        69yo male T12 complete since 1995
        NW NJ

        Comment


        • Finally finished the hoist:

          Originally I was using a block and tackle with 3 supporting ropes (see previous post, although that was the first iteration with only 2)
          That worked fine excepting I needed a convenient way to lock the rope when it was supporting the load. That lead to rope-lockers and other nautical stuff, which made me think about using a manual winch.
          I found the one I used for $17 overnight from Amazon.
          Problem solved!

          The pulley carrier on the arm is on an adjustable carrier with a lock-screw; I can vary the set-down location in the cargo area with it.

          Now it's time to see how far I can go with charged acid batteries. There's a hilly three mile loop from any house.
          Plan is to go out and see how far I get while overseeing the battery voltages as hills get harder, etc, and when I'm depleted, to phone my wife who can now come extract me! The R350 also has a handy 110V AC outlet in the cargo bay, but needs to be running to have it working. I can travel with my charger running.
          Attached Files
          Last edited by pfcs49; 04-23-2019, 07:45 PM.
          69yo male T12 complete since 1995
          NW NJ

          Comment


          • Wow, that is an outstanding winch system. I could see this in my wifes' Subaru.

            I use a bar clamp to hold the batteries together for strapping. Makes it a lot easier. I just got a new ZX with Lithium and love the distance I get. I never took the old one off my property because I wasn't sure how long the SLA's would last. With this one, it's gotten to the point I use it all the time when I go out. My wife says it saves my shoulders for hand cycling.

            I'm going to rebuild the one I bought from Pat so will be interested how it goes with your setup.

            Comment


            • Originally posted by Patrick Madsen View Post
              Wow, that is an outstanding winch system. I could see this in my wifes' Subaru.

              I use a bar clamp to hold the batteries together for strapping. Makes it a lot easier. I just got a new ZX with Lithium and love the distance I get. I never took the old one off my property because I wasn't sure how long the SLA's would last. With this one, it's gotten to the point I use it all the time when I go out. My wife says it saves my shoulders for hand cycling.

              I'm going to rebuild the one I bought from Pat so will be interested how it goes with your setup.
              The wooden shim deal on mine squares the batteries up perfectly anytime, anywhere you remove the strap.

              I spent a lot of time researching LFP batteries before just ordering Pat's recommended lead-acid batteries. From what I saw, I hunch none of the 12V LFPs should be charged in series; they need individual 12V chargers. If I had a way tor sensibly trust a vendor selling economical LFB batteries that charged in series, I might jump. The weight savings, especially for lifting, is pretty attractive as well as the hugely greater range and long life.

              Regarding shoulders: I'm 72 in June and 24 years of pushing my way around the world. My body is starting to show it! The first time I attached this thing and "whooshed" down the street effortlessly was a liberating experience! To go, and fast, and uphill without any effort. It was like being reborn!

              One construction note: there's a tire cover well just inside of the mounting for the lift. What provides the required lateral rigidity is a 5/16" threaded rod that goes through the quarter panel and is nutted under the tailight assembly. Otherwise, I would have needed a diagonal brace out into the rear bay.
              69yo male T12 complete since 1995
              NW NJ

              Comment


              • Originally posted by pfcs49 View Post
                Finally finished the hoist:...
                Quality professional work
                I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

                Comment


                • Originally posted by pfcs49 View Post
                  ...From what I saw, I hunch none of the 12V LFPs should be charged in series; they need individual 12V chargers...
                  Separate chargers is doable, just a pain. Leaving the batteries connected together might be an issue, don't know. I use two cheap 24 volt lithium batteries connected in *parallel* for backup purposes. But for charging and storage they are disconnected by a switch. Since I'm 10 amps or less, I chose an ordinary wall switch.
                  I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

                  Comment


                  • awesome setup pfc.
                    Bike-on.com rep
                    John@bike-on.com
                    c4/5 inc funtioning c6. 28 yrs post.
                    sponsored handcycle racer

                    Comment


                    • Nice work PFC!

                      Comment


                      • Still curious about a cheap LiFePo option.
                        These are interesting, 24V/10Ah @$168
                        Two of these in parallel would give a lot of run-time>OR<if run separately, give you a get out of jail for free card when the first went low.
                        http://www.batterysupports.com/ebike...k-c-19_21.html

                        Feedback please
                        69yo male T12 complete since 1995
                        NW NJ

                        Comment


                        • Originally posted by pfcs49 View Post
                          Still curious about a cheap LiFePo option.
                          These are interesting, 24V/10Ah @$168
                          Two of these in parallel would give a lot of run-time>OR<if run separately, give you a get out of jail for free card when the first went low.
                          http://www.batterysupports.com/ebike...k-c-19_21.html Feedback please
                          I did not see a local phone number or address on that site. It appeared to me to be more of an off shore source. Although many or most products now are imported, I like to purchase more locally. What I also had trouble with was the battery pack descriptions. Price, watts, Ah, and A sorting made little sense especially when the configuration 7s4p (7series4parallel cells) is the same. I think the issue is that each are using different type cells designed for different purposes. So whether or not your pick would be good would be a crap shoot IMHO. What you can do is call the people I purchased from. I think the brain people were/are in MN or somewhere near there. I bought the 10 Ah version of this, https://hilltopperbikes.com/product/...rinter-module/ don't know if it is still the same thing, but your could if lucky talk to someone about your amperage needs. See if they can clue you in to where you can get what you are looking for. They might tell you about the drop in 12 volt replacements. Those seem awfully small to me, Would four of them fit? nah too complicated to charge etc.

                          Edit: I meant to say also that LifePo4 is not the only safe battery out there. Check out Battery University: Lithium Nickel Manganese Cobalt Oxide, NMC, https://batteryuniversity.com/learn/...of_lithium_ion
                          Last edited by nonoise; 05-08-2019, 02:42 AM.
                          I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

                          Comment


                          • Originally posted by pfcs49 View Post
                            Still curious about a cheap LiFePo option...
                            It turns out I am in the hunt now for a new main battery, 24V, most ah, wh available that will fit my space. First place I look Endless Sphere and found this thread. It is worth reading, points out not all cell compositions are equal. And better be sure of your retailer. https://endless-sphere.com/forums/vi...p?f=14&t=88528
                            I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

                            Comment


                            • Lead acid batteries dead in ~2.5 miles

                              So Memorial day was perfect weather and I had an able bodied friend here, so we decided to do the acid test: a hilly three mile loop in my neighborhood.
                              We maintained a leisurely walking pace through out. It seems that if I select the third light speed, full throttle is that speed.
                              There's a .5mi ascent at the start of the circuit. At the start, all the battery condition lights were on and at rest voltage on my voltmeter was 26.4V
                              By the top of the climb, two battery lights were extinguished. What was interesting was that after a flat run, there's a long descending run. I almost think there may be a slight regenerative charging effect happening because during that run, the ammeter would score .3-.4 positive amps, and for a brief while, all the battery condition lights lit.
                              Long story short, the long term trend was less and less voltage/more battery lights out. Nearing the 2.5mi point, the top speed in "3rd gear" was noticeably lower; my walking buddy wanted to go faster. At this point, I was pulling 4-5A @~10v, clearly on it's last legs. Then we hit the last big hill and we were done!

                              As planned, I called my wife to come with the R350 with the lift in the cargo are to fetch us. No cell service! I'm fucked!
                              Fortunately Pete's phone was able to get service and julie soon appeared to rescue us.

                              I'm very disappointed! These were a pair of new batteries from Pat's favorite source. I hunch on level ground, we could go much farther, but this is where I live (Schooley's Montain) and where my wife walks!

                              Seems like I will necessarily need to do the LiFePO conversion in order to have the required endurance.
                              To salve my grief, we visited the Shoprite and got steamers. shrimp, and corn.
                              69yo male T12 complete since 1995
                              NW NJ

                              Comment


                              • This lithium source looks promising, don't know for sure if they beat the best of sla though.
                                https://www.mightymaxbattery.com/p38...heelchair.html
                                I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

                                Comment

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