turbocad6
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Posts posted by turbocad6
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I now remember it was not 3 but actually 4, the first 2 were home assembled packs made up from individual cells, I then thought that might be the issue, maybe the cells weren't matched well enough. they came from the same batch, new cells, but I haven't done anything further to match them properly beyond that, so packs # 3 and # 4 were commercial pre assembled 3S turnigy nano tech packs, this has been over the course of several months at this point. I'm going to pull the mod apart and inspect it for juice damage and inspect the board to see if I can see anything weird. for me the funny thing is they drain evenly in use, but then don't charge evenly, then if I individually charge the cell back up to match, the cycle starts all over again. now if I leave the mod just sit it drains cell # 3 by itself, this last pack is now toast as cell 3 has drained down well below 2v
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I have been having this same problem as havoc for a long time now, cell 3 not charging fully and stopping in the 3.8X range. keep trying to use it like this and eventually the battery becomes un-usable.
also, if you leave the mod sit for many days while plugged in the cell 3 actually drops even further in voltage. don't know if you're wiling to just let it sit for days and days plugged in but if you are I'm curious to see if your cell 3 will drop further too. I'm talking dropping way down, below 2v
I scrapped my first battery pack I built thinking maybe a bad cell, then eventually did the same with a second pack, now finally switched to a 3rd pack and after a week or 2 same thing. other than charging issues this chips been fine and I've been using it long enough that I'm now at almost 13,000 puffs but I've had to individually charge cells many times and have scrapped now 3 battery packs.
I have more documentation and many escribe images trying to illustrate this issue, been meaning to start a thread outlining everything but never really had the time. I'll try to post up some images and further description here when I get the time but you are not alone with this weird problem -
doubtful. the only way to accurately predict a curve would be to be able to sense the actual temperature, but if this was possible then it would void the whole reason for a predictive curve in the first place, so really there is no practical way to auto sense the wire curve with the current way temp control is implimented
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auto detecting different wire curves is not possible because it can only measure one variable, which is resistance. it can detect a variable temp wire vs kanthal simply by seeing the very quick rise in resistance, but it has no way of correlating the rise compared to actual temperature, which is why you have to input the correct curve
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well yeah, it could be picked up on a refinement poll pulse too if it happened to poll while an atty was off, but firing it without an atty is a sure fire way of duplicating this every time
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I've seen that msg before on earlier firmware as well. I think if you fire it without an atty and it KNOWS that there was an atty swap, then it automatically asks even if the resistance is the same or very close to the same
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that don't apply to you mike
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you're welcome Walt
I've helped a few guys out with these now BUT I just want to add here that I have NO MORE screens to spare. not for $10 each, or $20 each or even $30 each, please DON'T PM me asking to BUY any screens, I have NONE available at ANY price period, thanks
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hey Walt, i just emailed you, you'l have them this week for sure, wasn't expecting my move to take anywhere near as long as it did and I haven't had online access much of the week , sorry for the delay
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I have a few, when I heard about the issues with the factory I bought out the last stock from a vendor in the UK and paid pretty good money for them, but I also have like 20 dna200 chips coming to me soon so I def want to keep spares. I might be willing to let one or 2 go. let me know what you have in mind
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as long as the 510 ground is direct there is no reason the chip needs to be grounded to the case at all. a bad ground to case wouldn't be a problem
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well the more I play with this day after day the more I'm becoming convinced that the problem is the battery pack itself. I'm going to build a new pack for it this weekend. I wonder what the threshold is for the chip to show an imbalanced battery msg? all through this the chip never really complained about anything or showed any indication of the imbalanced battery even when it winds up almost 1/2 a volt off from each other
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this mod does use a separate ground wire for the 510. actually, aside from the ejecting 510 and the suicide battery connectors of the first ones, the construction itself of these don't look too bad. they do really shove the battery in there as a tight fit pressed against the 510 and they do only support the chip from 2 mounting points instead of 3 but I haven't seen anything that's an obvious chip killer in these.
have there been a lot of these things killing chips? I didn't even think there were that many of these out there yet. biggest complaint I see on these is delay after delay in actually shipping them out -
it's def spam. at first you might think that it's Chinese manufactures or someone with something against evolv personally. truth is that can't be ruled out, but spamming like this happens on a lot of other forums that have nothing to do with any competition issues, so it is more likely just spam for the sake of spam. this happens to many forums, especially newish forums that don't have many polished security things in place... once it happens to a forum once or twice then security measures wind up getting implemented and it becomes much less of an issue.
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Are you sure it's set to 2s in escribe?
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mine has been driving me crazy, even when I do get it to balance out perfect it's short lived and still winds up going out of whack again and again, and it's always cell 3 that seems to be the problem. I've been trying to document it with pictures when I have the time and here are some to show what I mean.
first, here is where it was several days ago. also notice that cell one is above 4.20, @ 4.21 while cell 3 is very low
now eventually I got it to balance out again, but while in use and discharged somewhat:
but then eventually the problem returns, here is where it winded up after an 8 hour charge:
then, yet again I got it to balance out eventually and then this is where it winded up again one morning after an 8 hour charge, balanced but wouldn't charge all the way to 4.20
then the next day I winded up with this after charging overnight. how can this show as only 99% ??
and now this morning I'm back to this:
it's just crazy, some days I wake to 100%, some days 99%, some days 97% and some days 94% and this is always after ~8 hours of charging
I've been wanting to finally seal this chip up but with the way it's acting here I just can't seal it up. other than these charging problems the chip has been working fine so I don't know what to do.
one thing I've been considering as a trouble shooting method is to take the 3S pack apart and re orient the cells, moving cell #3 to a different spot in the series to see if the problem follows that cell or remains on cell #3 to be sure if it's a cell problem or a chip problem but I haven't had the time to do that and honestly I don't think it's the cell.
this is driving me absolutely nuts. this is my first build I've been testing for over a month now and has been working fine except for this charging problem. I have 3 more chips I got with this batch and I just ordered 20 more chips to start building mods, but it's hard to have confidence in investing so much time money and effort into building more mods when I'm facing a problem like this. I don't know what to do here... anyone from evolve reading this, please... help!!!
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yeah, if it's a dna40 then forget everything I've said, send it back to evolve is all you can do with that
this forum is specifically for dna200's. 40's have had more than their share of screen glitches, not much you can do with it other than rma it -
have you tried a hard reset? update the firmware? it's not the screen itself, the screen itself is fine
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chris, first of all the spark when you connect the battery is NORMAL, it's the on board capacitors charging up. second of all most of the board failures so far have been caused by the mods there installed in, NOT the chip itself. third, do you type with sandpaper on your keyboard man, can't remember the last time I've seen anyone post as abrasively as you bro
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looks like the positive connection on the chip shorted to the case, the positive terminal is on the bottom, right near the case ground and that looks to be the point of origin from here to me
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dna40 large screen is the same screen as the dna200 so it's not that. I'd try a hard reset, update the firmware, stuff like that...
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Just refresh, the link you are clicking is leading to a post that was deleted so it errors out
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I haven't actually tried this in power supply mode myself, but you may be able to change one of the default display parameters to battery %, I've got mine set to show battery % on the main display instead of the default voltage since I'm always running in temperature mode but I'm not sure if it'll display that in power supply mode of if it even still references the battery curve and mah info once it's switched over to power supply mode tbh, worth a shot to try I guess. if it doesn't work then this would be something to request here, this may be something that's easy for evolve to add if it doesn't already work as-is
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SSV said:
Boards contaminated with e-liquid (inevitable in some designs) are showing signs of the conformal coating failing....
can't help with the other issues you're having but as far as the conformal coating I've noticed the same thing since even the dna20's.
I've spoken to brandon in the past asking about what I could coat the board with to waterproof it and he said it's already conformal coated and shouldn't need anything else, but e juice is not the same as just moisture, and it seems e juice really eats through the conformal coating and any time I got even a little e juice on the board usually the first thing it did was knock out the display. I'v been using these things in bottom feeders since the dna20's and that's one of the biggest problems of mixing a dna with a bottom feeder. I've lost several dna20's and 30's to e juice, then I started coating them myself to seal them better and so far that has worked out well for me for the most part, only problem is once I coat them I then can't warranty them if I have any other problem. the 20's and 30's were fine though because they were rock solid and reliable, once they were coated they just didn't ever fail, until the 40's that is...
I've lost a few coated 40's to problems other than e juice damage and those I just throw away so I've been now avoiding coating 40's unless I really have to in the design like when the chip is right under or next to the juice bottle . now I would love to fully waterproof one of these 200's but I'd hate to then have a problem with the board because then I just have to throw it out so I'm waiting till I hit like 10,000 puffs and if the chip is still going strong, then I'll try waterproofing that 200
here's a dna30 I did a long time ago and it's still going strong till today and I've wetted it many times since then and even had several e juice spills in this mod from time to time with no problems at all, I'd love to do this with a 200 soon but like I said then all warranty goes out when this is done really
[video]https://www.youtube.com/watch?v=LfepY3gTpDA[/video]
Balance charging not working?
in Batteries and Charging
Posted
honestly this mod is so compact and ridiculously tight that I will inevitably wind up doing at least some damage taking it apart so I've been really avoiding it. I double and triple checked and tested everything as I was building it just to avoid having to ever take it back apart again short of chip failure, but now I've more than 100% ruled out any possibility of it being a cell problem so I'm going to have to disassemble it. I'm thinking it's not impossible that some juice got in there as it is a squonker, but I've been careful so I do doubt it but can't really be sure. I'll take it apart soon and see