This is for a traxxas truck... I know... but the issue is with a BLX185 esc. An issue I never had before.
With the 19/54 (mod .8) gearing in it, 2200kv 4074 traxxas/castle motor on 3S... it's quick. I took it for a quick run and ran a couple packs through it. Started in my parking lot, just getting a feel for it to see how it did. After 5 minutes, I started walking it to the park a couple blocks away. I'm sure it's quite a site seeing a 40yo dude wandering around following a toy truck that appears to have satan himself in side it screaming down the sidewalk at 40mph.
Anyway, got to the end of my alley after about 5 minutes of hammering on it and all of the sudden, no motor power. I can steer, but I cannot brake or go forward. I walk up to it, pulling/pushing the trigger as I walk and it takes off again. I cruise at about 1/4 throttle, brake hard, cruise 1/4 throttle, brake hard, seems fine. Then I roll up to 1/2-3/4 throttle down the alley and it does it again, coasts to a stop. I gave it a few seconds, it started working again. I tried it again up to full throttle, went like a screaming idiot down the alley, then when I went to apply brake, nothing, just coasting at 40mph. 5 seconds, then it was fine again. So, I rolled it back to myself at 1/4 throttle, picked it up, pinned the throttle, pinned the brake about 5 times for 5 seconds or so at WOT and FULL brake. Worked perfectly.
Then I proceeded to drive it for 40 minutes and no issue the entire time.
This kind of happened at the end of my second or 3rd pack on Sunday with the 3660/3100kv motor in it. Except with that motor, it would chatter like one of the motor leads was disconnected after giving it full throttle. I'd wait 10 seconds, it would be fine for a bit, then chatter.
On a side note, I think I'm going to give up on my SMC lipo's. I built them out of 2 pairs of 2S packs that I used to run in my outcast/erbe/savage paired together in the same pairs. One pair was never used. The other was used for over a year. All 4 were purchased in 2018. I tore them apart and built 3S packs out of them to use in my stampede and ejato.
They are just taking waaaaaay to long to balance, don't stay close to balanced when running (over .5V difference, usually one cell) and take forever to get to storage charge. It's really odd though as one of the packs I made were out of brand new, never used packs. It was a pair I never actually used. The other pack, which I made out of packs I did use as a pair (in the ERBE, outcast, savage flux), works better, but not much. I'm tired of them taking 2 hours to charge... and getting crappy run times. Even though the one pair weren't used, they sat at storage voltage all that time. I'd check them every couple of months to make sure they were still at a safe storage voltage.
Ordered a pair of CNHL 5000mah 3S black series to try out. Will likely repurpose a pair of my hobbystar 6200 3S 45C packs for my eJato and stampede, then use the new pair of packs in my outcast/erbev2.
Anywho, anyone ever have this weird issue with the blx185? I reset it to factory when I got home, put my settings back in and recalibrated it to my receiver. Will see how it does now.
EDIT:
Just had a thought as I was reading https://www.arrmaforum.com/threads/what’s-your-lvc-low-voltage-cut-off-for-your-stock-blx-185.23153/#post-320889, maybe the blx185 is not handling the 3S pack properly. I know it says it can use 3S, 4S, 6S with the LVC enabled... but I wonder how many actually run 3S through this esc. Maybe the next time this happens, I'll disable the LVC in the esc for a bit just to see if the issue goes away. Then if it does, I'll have to figure out a decent lipo alarm that I can mount in the truck that's waterproof.
With the 19/54 (mod .8) gearing in it, 2200kv 4074 traxxas/castle motor on 3S... it's quick. I took it for a quick run and ran a couple packs through it. Started in my parking lot, just getting a feel for it to see how it did. After 5 minutes, I started walking it to the park a couple blocks away. I'm sure it's quite a site seeing a 40yo dude wandering around following a toy truck that appears to have satan himself in side it screaming down the sidewalk at 40mph.
Anyway, got to the end of my alley after about 5 minutes of hammering on it and all of the sudden, no motor power. I can steer, but I cannot brake or go forward. I walk up to it, pulling/pushing the trigger as I walk and it takes off again. I cruise at about 1/4 throttle, brake hard, cruise 1/4 throttle, brake hard, seems fine. Then I roll up to 1/2-3/4 throttle down the alley and it does it again, coasts to a stop. I gave it a few seconds, it started working again. I tried it again up to full throttle, went like a screaming idiot down the alley, then when I went to apply brake, nothing, just coasting at 40mph. 5 seconds, then it was fine again. So, I rolled it back to myself at 1/4 throttle, picked it up, pinned the throttle, pinned the brake about 5 times for 5 seconds or so at WOT and FULL brake. Worked perfectly.
Then I proceeded to drive it for 40 minutes and no issue the entire time.
This kind of happened at the end of my second or 3rd pack on Sunday with the 3660/3100kv motor in it. Except with that motor, it would chatter like one of the motor leads was disconnected after giving it full throttle. I'd wait 10 seconds, it would be fine for a bit, then chatter.
On a side note, I think I'm going to give up on my SMC lipo's. I built them out of 2 pairs of 2S packs that I used to run in my outcast/erbe/savage paired together in the same pairs. One pair was never used. The other was used for over a year. All 4 were purchased in 2018. I tore them apart and built 3S packs out of them to use in my stampede and ejato.
They are just taking waaaaaay to long to balance, don't stay close to balanced when running (over .5V difference, usually one cell) and take forever to get to storage charge. It's really odd though as one of the packs I made were out of brand new, never used packs. It was a pair I never actually used. The other pack, which I made out of packs I did use as a pair (in the ERBE, outcast, savage flux), works better, but not much. I'm tired of them taking 2 hours to charge... and getting crappy run times. Even though the one pair weren't used, they sat at storage voltage all that time. I'd check them every couple of months to make sure they were still at a safe storage voltage.
Ordered a pair of CNHL 5000mah 3S black series to try out. Will likely repurpose a pair of my hobbystar 6200 3S 45C packs for my eJato and stampede, then use the new pair of packs in my outcast/erbev2.
Anywho, anyone ever have this weird issue with the blx185? I reset it to factory when I got home, put my settings back in and recalibrated it to my receiver. Will see how it does now.
EDIT:
Just had a thought as I was reading https://www.arrmaforum.com/threads/what’s-your-lvc-low-voltage-cut-off-for-your-stock-blx-185.23153/#post-320889, maybe the blx185 is not handling the 3S pack properly. I know it says it can use 3S, 4S, 6S with the LVC enabled... but I wonder how many actually run 3S through this esc. Maybe the next time this happens, I'll disable the LVC in the esc for a bit just to see if the issue goes away. Then if it does, I'll have to figure out a decent lipo alarm that I can mount in the truck that's waterproof.
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