Tug Posted February 28, 2015 Share Posted February 28, 2015 That's Hobbywing for you. What voltage did the packs read at cut-off? Quote Link to comment Share on other sites More sharing options...
froggy8 Posted February 28, 2015 Author Share Posted February 28, 2015 3.55, 3.70 370 Quote Link to comment Share on other sites More sharing options...
Tug Posted March 1, 2015 Share Posted March 1, 2015 Hmm, doesn't sound too bad, you might need to leave the LVC where it is. That low cell could've been deep discharged if the LVC had been set lower. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 1, 2015 Author Share Posted March 1, 2015 yeah i needed to do that to see if i could storage charge back to normal and it did! it is now 3.82 3.84 3.84. that looks about right now doesnt it? i did get bit worried when i saw the cells at cut off. the first cell is out by 0.15. Quote Link to comment Share on other sites More sharing options...
Tug Posted March 1, 2015 Share Posted March 1, 2015 That's fine now, but there's definitely a lazy cell in that pack. Quote Link to comment Share on other sites More sharing options...
Mr. Doktor Posted March 1, 2015 Share Posted March 1, 2015 that one cell seems to have a slightly lower capacity than the rest. I would set the cut off higher Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 1, 2015 Author Share Posted March 1, 2015 what do you suggest? 3.2? Quote Link to comment Share on other sites More sharing options...
Tug Posted March 1, 2015 Share Posted March 1, 2015 For that pack you probably want to leave it where it is. If you lower it, that's fine, but use an alarm on each pack. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 1, 2015 Author Share Posted March 1, 2015 im using 2 lipos with 3.0 lvc, you saying stick with that? what if i use different pair? should i higher it to 3.2 then? Quote Link to comment Share on other sites More sharing options...
Tug Posted March 1, 2015 Share Posted March 1, 2015 Hold on, we need to clarify. It's on 3.0 now? It cut in and those were the readings you took straight after the run? Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 1, 2015 Author Share Posted March 1, 2015 yep the 3.55 3.70 3.70 reading was from the 3.0 lvc after the run. the esc is still on 3.0 lvc, not changed it yet like i said, i only did that to try get it back to normal as someone here suggested to go lower than 3.8 so i just chose 3.0 because of the lazy cell Quote Link to comment Share on other sites More sharing options...
Tug Posted March 1, 2015 Share Posted March 1, 2015 Yeah, I'd leave it there. I've got one on 2.8, this leaves the cells at approximately 3.5-3.6, which is fine. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 Ok will leave it at 3.0 cheers Tug mate Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 When you get new cells, I'd suggest using an alarm on each for at least the first run, just to be sure. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 When you say new cells, do you mean new lipos? Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 Yup. When new, coupled with a higher C rating, a new cell can hold out longer, this increases the risk of deep discharging them. I just want you to protect your investments, don't be complacent. When you change anything, even just the batteries you're using, you should immediately go back to the test phase, fit alarms and monitor closely. After a couple of packs, you should be able to determine if anything needs adjusting to accommodate the new kit. It shouldn't take long and saves cash in the long run. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 Cheers for that Tug, the other 2 3s lipo have no problems with any cells, just these 2. Noj told me there's no way fixing the lazy cell so I'm thinking maybe get couple new lipos if it does it again You saying use the lipo alarm, so if it does happen to have a lazy cell on the my new lipos then do I discharge them below 3.8? Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 Yes, that's fine, but use an alarm to make sure you don't go too low. After a couple of cycles you'll know if all is OK. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 so your advise is to keep it at 3.0 lvc untill the cells are all ok? or just keep it at 3.0 all the time? Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 If it's cutting in at the required voltage, leave it. Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 Yes the Lvc kicked in, it started slowing down then stopped. The esc was flashing red which means it's the lvc protection Cheers again Tug, will leave it now Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 noticed something few weeks ago but forgot to mention on here. there is grease around my drive cups and wondered if that is normal Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 Probably leaking out from the bulkheads, it gets applied to the crown and pinion. Yes the Lvc kicked in, it started slowing down then stopped. The esc was flashing red which means it's the lvc protection Cheers again Tug, will leave it now Say if I'm boring ya! Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 2, 2015 Author Share Posted March 2, 2015 Sorry I don't understand Tug, I don't think you are boring me. If anything you are helping me alot Is it meant to be leaking?When I said I will leave it, I meant I will leave it at 3.0 Quote Link to comment Share on other sites More sharing options...
Tug Posted March 2, 2015 Share Posted March 2, 2015 I was joking! No, it's fine. All my cars do it. Handy in a way as it has to pass the bearings on its way out, so lubes them as it goes. Quote Link to comment Share on other sites More sharing options...
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