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Topics - Doug S

Pages: [1] 2 3
1
Harley LiveWire Forum / Back in action, Jackson!
« on: October 19, 2019, 02:12:51 AM »
https://techcrunch.com/2019/10/18/harley-davidson-has-resumed-production-of-the-livewire/?yptr=yahoo

I hope they did fix whatever the problem was. We need to see if this machine will live or die based on its own merits, not production problems.

2
General Discussion / Aptera
« on: October 14, 2019, 07:48:35 PM »
For anybody who doesn't know, the original founders of Aptera are back, have raised funding and are saying they're going to have vehicles shipping by the end of next year. I was just reading an article about how they're thinking their embedded solar panels are going to be a big selling point, because (obviously) you can recharge in the sun for free. They say they can get enough juice to run 44 miles per day here in San Diego in the summer.

But the thing that caught my eye is that they say their vehicle can go 10 miles on 1 kWh. Even though they don't say if that's highway, city or combined driving, that's still impressive. It's at least competitive with our bikes, for a two-passenger enclosed vehicle. I haven't seen drag coefficient numbers for it yet, but it must be every bit as slippery as it looks.

Edit: Just looked it up. They say the Cd is 0.11. That's by far the lowest number I've ever seen for a street vehicle. They don't even have side mirrors to increase drag -- the law allows them to use a rear-facing camera now instead.

4
Parts, Mods And Hacks / 3D printing
« on: September 10, 2018, 08:15:40 AM »
Is anybody else 3D printing parts for their bikes? I was really unhappy with the mounting brackets for my windshield, so when I got my Creality CR-10S, I printed these up. I haven't mounted them yet, but I'm very happy with how they came out.

5
Zero Motorcycles Forum | 2013+ / It's getting old
« on: February 15, 2018, 09:30:43 PM »
Actually, it's not really "getting" old. I'm pretty tired of it.

Three weeks ago tomorrow, Friday 1/26/2018, I was enjoying a nice ride home from work, thinking pleasant thoughts about the weekend ahead, when my bike lost power. I was in the fast lane of the freeway, on a long overpass with virtually no left shoulder and a 90-foot drop to the San Diego riverbed below, when the power cut out in an instant and the dashboard went dead. Long story short, I managed to coast to the end of the overpass where there was a shoulder, got off the freeway safely and succeeded in not dying.

The bike is still in the shop, at the San Diego Zero retailer who I'm not going to name. They replaced the MBB (twice, actually, since Zero seemed to ship the first one unprogrammed). They replaced the DC-DC converter. They replaced the PCB in the battery module (I believe that's the BMS?). As of  yesterday (Wednesday, 2/14/2018), the dashboard lights up but still no power (motor doesn't run).

Mostly I'm just venting. Yes, we're still early adopters, and that can get expensive. Yes, it's still an immature technology -- sure, EVs have been around for 100 years, but the advanced electronics to control them are quite young. But this is ridiculous. I haven't gotten the bill yet, but I'm going to have to pay for the new MBB, the new DC-DC converter, probably not the BMS (it's under warranty since Zero rebuilt the monolith not too long ago), and of course, the labor to replace all the high-dollar hardware. Nobody has any idea how much it's going to cost me or, more importantly, how long I'm going to be without my bike before I even have the privilege of paying the bill.

But I'm also just searching for ideas to improve the situation. We lost Patrick Truchon because he got fed up. I know others have bailed without saying so in public. I never thought I'd say it, but I'm getting close, too. I toy with just springing for a new 2018 SR, but I haven't seen all that much to think the hardware has improved significantly in terms of reliability, and the service from Zero would be the same thing all over again. (Plus, I'd still have to get the old bike running anyhow, since a bike that isn't running has virtually no value.) The local dealers don't have any idea what to do with the bikes, and Zero doesn't seem to care much. Although we have a very diligent, energetic and bright community full of engineers and talented people, there really isn't much any of us can do about it, either. We had to rely on Burton to even create a wiring diagram, there's no way we'd be able to do anything about shoddy PCB design or crappy firmware.

I keep having visions of an open-source electric motorcycle, a repository-based sort of thing. Let the community design the bike to fit OUR needs, and improve the bike as problems come to light in the real world. We have resources and a lot of knowledge and enthusiasm -- I'd donate my PCB and firmware design skills, and I bet a lot of other people would too. But then again, every open-source project I've come into contact with sux pretty bad. Just the other day SourceTree "upgraded", I lost access to all my repositories and had to do everything from the website, then they "upgraded" again to fix the problem. On my Android phone, VLC recently "upgraded", I lost all my playlists, then they "upgraded" again and (sorta) recovered my playlists. There's no way I'd tolerate that sort of behavior in a motorcycle.

Like I said, mostly I'm just venting. I don't think there's any solution except for time...Zero's got to evolve, get bigger, and develop a customer service department with some real horsepower. They need to bring the dealers up to speed, and continue developing more reliable, easy-to-service hardware.

But if anybody has any thoughts?????

6
General Discussion / Climbing hills and potential energy
« on: September 15, 2017, 08:36:01 PM »
I just did a quick calculation, and thought it might interest other people. I've wondered how much energy it takes to climb hills, so I finally ran through the calcs. It turns out, to raise 300 kg of mass 1000 meters high requires 0.833 kWh of energy.

More than I thought. Clearly altitude changes will have to be taken into account if you're heading into the hills.

7
Zero Motorcycles Forum | 2013+ / Inaccurate SoC indication?
« on: September 04, 2017, 06:11:29 AM »
So yesterday I took my first semi-long trip with the Diginow charger (in 100 degree weather, excellent timing, eh?). I went to have lunch with my father and the rest of our family for his 86th birthday; a round trip of ~200 miles, so I'm not quite a member of the 250-mile club yet. I'll get there soon enough.

The charger worked like a champ and I can't say enough good things about it. What did not, distressingly, was the bike's SoC indicator, either on the dash or on the app. Long story short, after thinking through what I saw yesterday, and discussing it with Brandon, I'm quite sure that the SoC indication can be pretty wildly inaccurate.

I recharged three times on the trip. The first two times I didn't do a full charge, trying to take advantage of the fact that the CC charging phase ("bulk charging") is the fastest, and not get into the CV phase, which is slower. That means you only get back up to 80% or so, but it improves the ratio of time spent riding to time spent charging That worked fine, but afterwards, the SoC indication didn't seem right.

The third time, I was in no hurry and nobody was waiting to charge, so I just let it finish. The cell voltage got up to 116, charging current dropped to 8 amps, but the SoC indicator on the app still said 65%! That's just wrong -- 8 amps at 116 volts is not only CV mode, it's trickle charging. I walked over to the bike, and on the dash, it read 100%, which IS correct.

So my conclusion is the firmware doesn't track SoC very well through partial charges, especially multiple partial charges. But once the battery is FULLY charged, the SoC is reset to 100%, and of course that's accurate. Partial charging might be effective at reducing charging time, but it messes up the SoC indication.

I'm seeing now how it could be very useful to have a voltage indicator where you can see it 100% of the time. It's sad that the firmware doesn't work better, and I'm still a little concerned that it may make decisions like cutting back power when the SoC is still pretty high. But that's what we have to work with at the moment.

Is that what others have experienced? Am I misinterpreting something?

8
General Discussion / "Parking fees"
« on: August 25, 2017, 03:26:53 AM »
So I (finally!) got my Diginow up and running this weekend, tested it on the 14-50 outlet I have at home, and it's great. Yesterday after work I went to a Chargepoint station on my way home to verify that the card was initialized, billing worked correctly, etc. That all worked great and in 26 minutes I received 2.713kWh of energy at a cost of $0.81 (not as bad of a ripoff as I was expecting actually -- I'm not going to use it too often anyhow).

As I was also pretty much expecting, two of the four stations had non-EVs in them, making them inaccessible (though on the bike I could have gone up on the sidewalk if necessary). I was rather pleasantly surprised to find that the parking fee for the station I was using was free until 6:18 pm, by which time I would have been out of there anyhow. At 6:18, it was scheduled to go up to $2.00 per hour.

But that got me thinking. After 6:18, of all the vehicles in this large shopping center parking lot, none of them would have to pay a parking fee EXCEPT FOR the charging EVs....even the ICE cars hogging the EV spots! We're being charged for parking when nobody else (even the scofflaws) is.

Is that standard practice? Are the rates determined by the service provider (Chargepoint in this case) or by the facility (the shopping center)? I feel the need to craft a Sheldon Cooper blazing email but I'm not sure who to send it to.

9
EV Stocks / Sevcon takes another leap
« on: July 18, 2017, 04:05:59 AM »
If you own any Sevcon stock, you'll be pleased to note that it jumped 60% today. An announcement has been made that they're going to be acquired by BorgWarner.

10
Parts, Mods And Hacks / Another headlight option
« on: May 17, 2017, 06:41:13 AM »
I've been running this H4 "bulb" for a while now:

https://www.amazon.com/gp/product/B01I28WNUQ/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

and I love it. For some reason it disappeared from Amazon for a while, but it's back now, so I thought I'd post it. BTW that's my review under the name Jack Abramoff (my warped sense of humor).

11
Zero Motorcycles Forum | 2013+ / 2014 SR shock absorber replacement
« on: May 17, 2017, 01:26:26 AM »
I posted this elsewhere when I probably should have just made a new thread and not hijacked someone else's.

The rear shock absorber on my 2014 SR wore out fairly recently, for the THIRD time. The first two times, Zero replaced it under warranty, but this time the bike's out of warranty, and I didn't want that stock crap on my bike any more anyhow. So I called Harlan and he sourced the unit they use for their racebikes. It's pricey, but it's fully adjustable and I imagine much longer-lasting than the OEM crap: http://www.jrishocks.com/shop/powersports/double-adjustable/ It came set up too stiff but a full turn of the preload adjuster ring made for a very nice ride. It's still quite firm but I'm going to ride it that way for a while in case I'm just still used to the original (soggy) ride.

I do recommend at least discussing it with Harlan because he knows the spacer sizes required -- mine actually arrived with the wrong spacer and Harlan had a local machine shop fab me one at no charge.

12
Zero Motorcycles Forum | 2013+ / 2014 SR not charging fully
« on: April 04, 2017, 09:00:16 PM »
It seems to me I remember seeing a thread at least similar to this, but the search utility isn't very useful for popular phrases like "not charging fully".

My bike is suddenly not charging fully. I noticed last Friday when I went to get on the bike for my morning commute, it was only at 92%. Keying the bike off and on again didn't clear it up (it has in the past, though that was several firmware upgrades ago). Over the weekend, it did the same thing, so I'd unplug and re-plug, and it would resume charging and finish up to 100%. This morning, I went and checked on it as soon as the alarm clock rang, and it was at 88%. I plug/unplugged it, and it was ready to go by the time I'd showered, dressed and had breakfast.

This is a completely new behavior...it's always charged right up to 100%. I did have the charger failure a year or more ago when several Zeros failed because of a bad batch of chargers; it was replaced under warranty and has been working perfectly since. It also doesn't feel like an actual charger failure since it does charge, and it will resume when I plug-cycle it. My battery was also rebuilt to 2016 specs a few months ago (including BMS and MBB) when I had a disastrous failure.

Since it charges most of the way up and then stops, and resumes immediately after a quick unplug/plug cycle, it almost feels more like a firmware bug than anything else. I'm going to try resetting the BMS and see if the problem goes away, which would seem to be more evidence of a firmware bug.

Has anybody else experienced this? What was your solution or have you found one?

13
EV Stocks / Sevcon up 50%
« on: February 04, 2017, 08:25:47 AM »
Does anybody know why Sevcon's stock value went up 51% in one day (today)?  I just checked my holdings and was shocked to see such a huge one-day jump. I checked their website but there's no new news or anything that might account for it.

14
Electric Motorcycle News / Engadget writeup
« on: November 10, 2016, 10:03:30 PM »
It's short, but for maybe the first time, I didn't find a single factual error in this writeup:

https://www.engadget.com/2016/11/09/zero-motorcycles-2017-range-power/

15
Zero Motorcycles Forum | 2013+ / My Diginow has arrived!
« on: July 23, 2016, 09:45:17 PM »
Here's my Diginow charger, fresh out of the box. The boyz said it's okay with them if I document the process here, so I'm going to do that. If anybody wants to re-post on the Facebook site, have at it. I don't do sociable media myself.

The input cabling is on the left; it consists of a J1772 connector, a fairly long cable with a protective shroud (which apparently has an embedded pilot signal generator in it), and a high-power Anderson connector and a ground lug at the other end, for connection to the charger and (presumably) a frame bolt. The J1772 isn't going to be very friendly with the Zero charge tank housing, so I'm going to have to get a little creative there...but it should be doable. I'm an EE, not a mechanical guy, but I'm not completely incompetent with the mechanical stuff. I'd prefer a shorter cable, but I'm not going to shorten it. I don't have the crimper for these giant crimp terminals, and I'd much rather rely on the crimp connections Diginow made. They obviously made the cable a bit longer so there's some mounting flexibility for things...people putting their chargers in different locations will appreciate that.

The output cabling is pretty simple; a high-power Anderson connector and a smaller waterproof connector connect to the charger output and the control module, respectively, on the input side. The signal wires are clearly intended to interface with the MBB on the bike to throw the main contactor for the charging cycle. On the output end, the standard Anderson connector will be plugged into the Zero external charge connector, but to allow for snaking the cable through the frame to get there, the connector crimp terminals haven't been installed into the housing. The individual wires will be routed where they need to run, then the terminals installed into the housing before plugging into the Zero connector. The one marking I can see is pretty smudged, but the high-power cabling seems to be 6 AWG silicone wiring, both on the input and output sides of the charger. Nice.

There wasn't any mounting hardware included, however, and I'm waiting for the guys to respond to my email about that. We discussed the mounting hardware, so I'm sure there was supposed to be some included. I have all sorts of ideas running through my head for mounting the controller, but I want to do it the way the Diginow guys intended.

Also not in the box were the 14-50 and CHAdeMO adapters I ordered. I'd be surprised if the CHAdeMO adapter even exists yet, so I'm not concerned about that, but I do plan on using the 14-50 a lot, perhaps more than the J1772. I know that adapter exists because they showed it to me. I'll want that soon.

I'm eager to get working on it, but I want to wait to clear up the mounting issue first. As much as I want it done fast, I'm even more determined to get it done right.

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