Tear101 Posted June 16, 2013 Share Posted June 16, 2013 Evening all, i have finally got my slash converted to brushless and ran a fully charged lipo through it. after about 30mins of problem free running i mashed the throttle and the truck didnt hardly responed, i let off and then gave it half throttle and it went fine. Gave it full throttle again and hardly any response. could this be the low voltage cut off kicking in. This is my set up Slash 2wd Etronix photon 2.0 10turn combo 7.4v 4000mahr 2s lipo Low voltage set at 3.4v per cell From the ESC instructions i cant find out how the ESC tells you its reached low voltage. Anyone got any idears? Sorry if my explanation sucks! Quote Link to comment Share on other sites More sharing options...
Candyman Posted June 16, 2013 Share Posted June 16, 2013 (edited) Yes thats the point at which you need to stop running the truck! just re-read your post, if you have set the LVC to 3.4 then it'll most probably be active. Edited June 16, 2013 by Candyman Quote Link to comment Share on other sites More sharing options...
Tug Posted June 16, 2013 Share Posted June 16, 2013 Read the instructions first! Quote Link to comment Share on other sites More sharing options...
Tear101 Posted June 16, 2013 Author Share Posted June 16, 2013 I did read the instructions back to front before setting it all up but the problem is the instructions are very bad. They tell you how to set low voltage but dont give any details of how it will tell you its reached that point. Theres no lights on the ESC so i thought it might beep at me but it dosent so i guessed the lack of power was the cut off point. Quote Link to comment Share on other sites More sharing options...
Candyman Posted June 16, 2013 Share Posted June 16, 2013 I would say so, its how the traxxas VXL esc and my hobbywing esc works, when you feel the dip in power, quit running. Quote Link to comment Share on other sites More sharing options...
stretch Posted June 16, 2013 Share Posted June 16, 2013 (edited) it probably is the lvc kicking in, put a voltage checker on your battery and if its around 3.4 ish per cell then that'll confirm it. Edited June 16, 2013 by stretch Quote Link to comment Share on other sites More sharing options...
Candyman Posted June 16, 2013 Share Posted June 16, 2013 (edited) well under load it would have dropped to 3.4v and triggered it, after its sat for a minute it'll creep back up to 3.6 or so, which is how you want it. Edited June 16, 2013 by Candyman Quote Link to comment Share on other sites More sharing options...
ooO CuRbY Ooo Posted June 16, 2013 Share Posted June 16, 2013 i have a hobby king 150a esc i have set my esc at 3.4.. once it reaches that point my rc goes into limp mode i.e goes ever so slow.. thats when i know its time to stop and change the battery over .. if i have gone through both lipo's i stop running and stick them on charge.. Quote Link to comment Share on other sites More sharing options...
RussH Posted June 16, 2013 Share Posted June 16, 2013 You can buy low volt alarms for a couple of Quote Link to comment Share on other sites More sharing options...
stretch Posted June 16, 2013 Share Posted June 16, 2013 well under load it would have dropped to 3.4v and triggered it, after its sat for a minute it'll creep back up to 3.6 or so, which is how you want it. that's why I said ish lol Quote Link to comment Share on other sites More sharing options...
Tug Posted June 16, 2013 Share Posted June 16, 2013 Excellent replies, all of them! Quote Link to comment Share on other sites More sharing options...
RobBloor Posted June 17, 2013 Share Posted June 17, 2013 You can buy low volt alarms for a couple of Quote Link to comment Share on other sites More sharing options...
Tug Posted June 17, 2013 Share Posted June 17, 2013 There's an excellent low voltage alarm in the bargain section. They come from Banggood for less than 2 quid. 1 Quote Link to comment Share on other sites More sharing options...
RobBloor Posted June 17, 2013 Share Posted June 17, 2013 There's an excellent low voltage alarm in the bargain section. They come from Banggood for less than 2 quid. TY The Admiral - I'll get some ordered! Quote Link to comment Share on other sites More sharing options...
Tear101 Posted June 17, 2013 Author Share Posted June 17, 2013 cheers for all the info guys! Might have a look at one of those alarms for my truck just to be on the safe side! Quote Link to comment Share on other sites More sharing options...
Bigjimknickers Posted August 3, 2013 Share Posted August 3, 2013 You can buy low volt alarms for a couple of Quote Link to comment Share on other sites More sharing options...
JED Posted August 3, 2013 Share Posted August 3, 2013 http://www.ebay.co.uk/itm/300570068171?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 I've been using this one as it has an alarm, plus you can see the voltage on the screen. Attached with servo tape and a balance lead extention cable. Quote Link to comment Share on other sites More sharing options...
RussH Posted August 3, 2013 Share Posted August 3, 2013 Yes, I always leave them in the model on an extension lead & just connect when a battery is inserted. Would be nice if Lipo manufacturers could build some type of low cell alarm into the battery,.... BOGGER.......have I now just ruined my chance of making a small fortune...... Quote Link to comment Share on other sites More sharing options...
stretch Posted August 3, 2013 Share Posted August 3, 2013 don't need it as brushless escs have lvc Quote Link to comment Share on other sites More sharing options...
Tear101 Posted August 9, 2013 Author Share Posted August 9, 2013 http://www.ebay.co.uk/itm/300570068171?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 I've been using this one as it has an alarm, plus you can see the voltage on the screen. Attached with servo tape and a balance lead extention cable. I have just got one of these but not sure how to rig it up! do you plug it into the balance port on the battery? Quote Link to comment Share on other sites More sharing options...
JED Posted August 9, 2013 Share Posted August 9, 2013 I have just got one of these but not sure how to rig it up! do you plug it into the balance port on the battery? Yeah - plug it into the ballance port on the battery. I use an extention for the type of bat I'm using at the time (EG a 2s or 3s extention wire.) with the readout facing you you plug it in to the pins on the left. Must be the right way round. once on, it will beep and display the battery votage for you. Quote Link to comment Share on other sites More sharing options...
Tear101 Posted August 9, 2013 Author Share Posted August 9, 2013 Thanks for the help jed! Quote Link to comment Share on other sites More sharing options...
PurcyP Posted August 9, 2013 Share Posted August 9, 2013 you shouldnt need a volt alarm/checker if your esc uses a cut off. its a handy tool to have however but when the LVC kicks in, its rather obvious. Quote Link to comment Share on other sites More sharing options...
Noj Posted August 9, 2013 Share Posted August 9, 2013 A good way of checking that your ESC lvc is working correctly though, for the sake of connecting one and taping it down....once you've confirmed it, job done Quote Link to comment Share on other sites More sharing options...
Tug Posted August 9, 2013 Share Posted August 9, 2013 you shouldnt need a volt alarm/checker if your esc uses a cut off. its a handy tool to have however but when the LVC kicks in, its rather obvious. I have two HW ESCs with poorly calibrated LVCs. Lipo alarms solve the issue and are (as Noj mentioned) useful for checking the calibration of a new ESC during the set-up period. 1 Quote Link to comment Share on other sites More sharing options...
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