teklektik said:
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mlt34 said:
Besides, from my experience I haven't enjoyed the speed limiting feature of the CA. I've found it to be very clunky - where when you hit your speed limit, you lose power suddenly and then it takes a few seconds to regain that power when drop below the speed limit. Perhaps that's fixed in the V3,...
>>> Properly installed CAs don't perform this way.
A couple of thoughts on 'Improper installation':
- It sounds like you wired it up and never bothered to adjust the operating parameters for your bike. Your symptoms are typical of what can arise in this situation.
- After reading your method of adding a CA-DP connector to a controller - and realizing that method is incorrect and can cause the PI controller to over/undershoot - I'm thinking you modified the controller and blamed CA for the resulting crappy operation...
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mlt34 said:
The external shunt CA ... works just as well as the plug and play CA, except that you don't get any of the limiting features, like speed and current limits.
>>> All CA models of a given version have identical PCBs, firmware, and operational features.
The V2 standalone CA is assumed to be a custom installation - you simply need to hook up the throttle override connection for either simple 'limiting' operation or for closed-loop Current or Speed Throttle as found in the V3.
The proof is in the pudding - on both points:
- I have run 3000W dual controllers with a single V2 Standalone CA with smooth as silk LVC, current, and speed limiting. Worked perfectly.
I don't want to sound harsh - but you are 'teaching' people about the CA as part of your business. You have an obligation to make extra effort to 'get it right'.
Endless-Sphere owns a great debt to Justin and IMHO it would be seriously uncool if this kind of negative/erroneous stuff found it's way into your book/site/coursework to be spread as gospel.
Regarding the first part, that was using a Lyen controller and V2.3 large screen CA. That's just the experience I found, it wasn't a matter of any custom connections. The limiting just didn't seem as 'fluid' as I would have hoped. That's not a jab at the CA or anything like that. The CA is an amazing piece of ebike engineering. I was just saying I personally don't use the speed or current limiting features that much. That's probably largely because most the bikes I own aren't pushing the limits of speed and power, so their top end is fine as-is. It wasn't a negative statement or meant to detract from the CA.
Next, to my knowledge the standalone CA doesn't give you speed limiting or current limiting without modifications. Yes, of course its the same board/hardware/firmware etc, but the point is that the standalone CA doesn't tap into the throttle override. Sure, you can modify it, but at that point its not a stock CA-SA anymore. Again, I'm not trying to detract from the CA by saying that, I was simply answering the question from bowlofsalad which was:
I am curious as to how this compares to the idea of using an external shunt with a CA.
to which I responded that the CA with the external shunt works just as well as the CA-DP, the main difference being that it doesn't provide speed limiting features. Perhaps I should have said it doesn't provide the speed limiting features
straight out of the box.
I understand your last point, but you also need to understand that this isn't about "my business" at all, if you can call selling a few copies of an ebook a month "a business". Yes, the CA is included in the book I wrote, where it got a glowing review and recommendation that anyone who wants to know what's going on with their ebike get a CA. Stuff about adding CA connectors to controllers isn't in the book at all because the book is aimed at total beginners. I simply suggest in the book that people either getting a CA enabled controller or go with a stand-alone unit if they get a kit that doesn't come with a CA connector.
The write up and photos I made for a site that is 100% free and is designed to be an ad-free place for people to learn more about ebikes, it's not a business. Sure, we've got ES, but most noobs I've worked with consistently tell me they find ES overwhelming and hard to search through. I can't say I disagree with the second part, illustrated by the fact that even after my own searching, I didn't find the link you sent to me from the 100+ pages of the CA V3 thread. It was only after you sent me the link that I found the helpful info. But that's neither here nor there.
Justin is a hero, I'm not trying to do anything "uncool" to him. Rather the opposite, I've always promoted the CA in every class I've taught to noobs, in my book and video courses. Now I did make a couple mistakes in my writeup and I certainly do appreciate your help and corrections to make sure everything is totally factual. That being said, some of what you call 'incorrect' isn't actually incorrect, it's just not how you would describe it, such as when I said the CA-SA doesn't do limiting features out of the box. But you are absolutely right that some of that stuff can be better worded to make the facts clearer, and I'm going back and fixing that stuff as per your suggestions.
