Blog / General
Posted on 16 May 2014 at 01:26 am (CET)
Another small update. A few days ago I already got the steel corner profiles, strips and a plate for the battery boxes and charger. It weighs quite much all together. Wanted to try and saw this by hand with a mitre saw but after half an hour I only sawed one profile so I stopped. Meanwhile I've bought an electric mitre saw which can be used for wood, aluminium and steel, will always be worth it's money that way. Tomorrow or this weekend I'll be able to continue again with sawing the profiles.
But that wasn't all yet, I also went shopping on Ebay (will have to be careful with this, already seen many nice things) and got a new throttle with grips. Not to make it look better or anything like that because they look pretty much alike and are still Chinese but this is one with a hall sensor built in. Now I won't have to use the seperate potentiometer anymore where the throttle cable was attached to. And also won't need a throttle cable anymore. That's probably the best thing because I still remember really well from my scooter era how annoying these throttle cables can be when they suddenly break. Now there's a cable going straight from the throttle to the controller, or like they call it drive-by-wire. They're a bit shorter than the original and closed on the outside so everything's moved a bit more towards the ends of the handle bar. Will have to wait and see if I like it this way, otherwise I could just cut off a small part of the handle bar on both sides. Also bought a 2nd set of these as backup, they're still Chinese ofcourse. Was pretty cheap anyway.
I also wanted to move the mounting points for the mirrors a bit, it went well on one side but on the other side not so much. This is what happens when you overtighten them just slightly.
Also received a new digital dashboard today. Trail Tech Striker with seperate dashboard around it and a seperate tachometer.
It all looks nice and it's quite a bit smaller than I thought it'd be. But today I also tested that seperate tachometer and unfortunately it doesn't work. Normally its wire just gets wrapped around the spark plug lead to get the pulse signal but this can't be done with mine. The controller does have a function to pass on the pulses of the RPM sensor but when I connect to tachometer to this it unfortunately doesn't do anything. Already contacted Trail Tech about this en according to them this indeed can't be done since it's inductive and needs high voltage (like with an ignition coil). So I can't do anything with this unfortunately. Will have to see if I can send it back. The Striker dashboard I still haven't been able to test yet but I don't expect any problems with this, should all work well.
On Ebay I also still found some rubbers that go around the connectors for the charger and DC-DC converter. This way it'll all last a bit longer again if no water/moisture can enter.
Today I also found out that I received the wrong contactors a year ago (for reverse and another one to turn on and off). I ordered them for 72V with 12V coil but instead I now have them with 72V coil. No idea how this could have ever gone wrong because what use is a 72V coil when you're actually switching 72V as well? Seems pretty obvious that this should've been 12V but oh well. Going to contact that company where I bought them from and see what they can do. That was about it for today.
I completed the drawing of the mounts for the top case and rear lights. Also made a paper model of it again to see if it fits. It barely fits as it should.
First here's the drawing of how it'll be like. Ofcourse the real ones will look a little better with skewed edges and again an opening in the bigger part. The top 2 mounts are ofcourse for the top case, the bottom one is for the rear lights.
They just come out from under the fenders. I wanted as much clearance as possible between the mounts and the controller so it'll stay visible well. The top case will also be as low as possible and will be a bit tilted (about the same as the fenders), will look better than completely straight I think. Same for the lights, by default these are a bit tilted as well so I wanted to keep this about the same. It'll only be a little lower.
But it'll be easier to see once they're made. First I have to discuss with the metalworking company if it can all be done and if it's not too expensive. Will probably take a while before it's done I think, depends how busy they are.
Today I got something new, a top case. And to make the quad bike even more international I added some Italian flavour. It's a Givi E340 Vision Tech.
They also had one with a red reflector but I think this matches better with the rear light. Might still add some leds to it some day as an extra brake light.
This plate came with it for attaching the case. I'll first have to make a drawing again and have some mounts made so I can attach this plate and the rear light + signal lights.
Now you might be wondering why I'm already busy with accessories while the quad bike isn't even drivable yet. But this top case won't just be for storage. I have these 2 contactors to be able to drive forward and in reverse but I had no idea how to place them properly.
I ofcourse could build some enclosure again but I don't think this would look good since it's a rather big part so it sticks out pretty much. The plan now is to just place this in the top case, this way I'll have an enclosure that's already water and dirt proof and also some extra storage. Might also place the 12V battery and other electronic parts in here, at least I won't have to find some space in the frame then.
I'm also looking if I can mount the license plate at the bottom behind the bearing house. But I'm waiting for the RDW to confirm if this is allowed. The rules state that it should be mounted at the appropriate place. But well, what is that exactly? Not really very clear is it. But I think it would be a nice position for it, the controller would be visible from behind as well then. Otherwise the license plate would be in front of it.
Posted on 10 January 2014 at 08:23 pm (CET)
Unfortunately not much has happened with the quad bike project these past few weeks. For a few weeks I've been busy with a woodworking project and for the rest I also didn't really have much time.
But here's a small update. I'm planning to continue again with the project soon. Because of the woodworking project the quad bike got covered in a layer of dust. So I washed it completely for the first time, the white frame is shining nicely again.
Also bought a quad bike cover so this at least won't happen again. Fits perfectly now, hopefully still does when the fenders and mirrors are on.
For the rest not much news just yet. Will hopefully change soon once I get some more time again. I'm really looking forward to continue with this project again.
Posted on 15 September 2013 at 12:10 am (CET)
Today I made some thicker cables so I can test with some more power tomorrow. Top speed won't really be high with just 20-24V but will probably have some more torque since I can push more amps through these cables.
Was quite some work to make them the right size and to put the cable shoes on them. But I bought an hydraulic crimping tool a while ago specifically for this so it went reasonably well.
Also put some heat shrink around the cable shoes. Might be using these cables more often when I'm bored.
Then I had a whoopsie moment. Was planning to place the sensorplate for the display on the shorter cable. But I already put both cable shoes on it so I couldn't get the cable through the sensor anymore. Since I didn't have any extra cable shoes of this size I just cut the cable, placed the sensor and soldered it. I just couldn't get the cable hot enough so it's pretty badly soldered. Only the outside really, on the inside there's no solder and the wires are just pressing against eachother. For longtime use I definately wouldn't accept this. But just for testing tomorrow it should be fine.
The 2 car batteries are also on, I'm fully charging one of them now. Tomorrow I'll just have to put a strap around them to keep them in place. The Chinese really did make a good frame. Both of the batteries just fit exactly in width. There really is no space left between them, not even 0,1 mm I think. Like they knew I was going to do this when they welded this frame.
So tomorrow will be another exciting day hopefully without problems. In any case the quad bike's ready, just still have to fully charge the 2nd battery tomorrow and connect the cables.