blackgoat04
Active Member
- Messages
- 176
- Reaction score
- 89
- Arrma RC's
- Granite
- Thread starter
- #21
nevermind...drive shaft is out. derp
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
is it possible that having diff fluid that's too thin might play a role in this high motor heat, cogging, brakes not working on the hill? it's so thin the other tire isn't spinning backwards when I rotate the other side. watch
https://www.dropbox.com/s/fq71aq0mm5x9oxn/20190212_212107.mp4?dl=0
yes. no. not today. I just tore it down on Sunday and cleaned bearings, changed diff fluids, grease etc.... but I did have the diffs in my hand they sound great. did you hear the one in the video?? quiet as can beHave you opened the diffs to see whats in there?
He’s right. Especially if the windings got overheated and have a partial short they’ll make the motor spin in reverse.Some brushless motors start to do the excessive cogging when they are somewhat damaged and about to die. If there is some loss of power w it then the motor is not thay healthy, possibly will run backwards at times. (on some occasions)
I sent Arrma(horizon) a email about the cogging. I just replied back to the same guy that sent me out the other 2 motors. ???He replied back with "
Hi Chris
That cogging means that there is something wrong with the motor, I have placed an order for a replacement motor and pinion gear. They will ship out on order M9*.
Have great day
??????I think this guy might be a robot. That's the third motor!!
I replied again and said that the car randomly stops and the ESC starts beeping but steering still works... He replied again
Chris
That is possibly due to the motor cogging causing the esc to go into thermal protection. Let see if the new motor will take care of that.
Thank you
I'm done!!!!!
Not super knowledgeable on this, but our motors don't have a lot of high tech circuitry in them. no boards etc. just wrapped wire and leads.....as far as I know. I could be wrong thoughFor what it's worth, I swapped in a BLX 185 with the BLX 100 motor and it still cogged. So maybe it does have to do with the motor
well for fun I swapped motors. I put in the 3800kv that Horizon sent me for warranty (bad bearing). Runs smooth as butter. I got to run it for about 5 minutes before I had to get back to work. but it did not have any cogging issues. I need to drill out a couple of holes on the motor mount so I can change to different gearing. when I get home this evening I will be able to run it a lot longer and see how it goes.All my dead motors died from just wearing out. Never had one actually have a can issue, always been the rotor.
6 minutes!? Even my dirt cheap floureon 3s 5500 lasts for 20-25 in my Granite BLX, stock of course. How is your ESC draining them so fast. That's just weird. I know these ESCs are junk. Maybe I haven't ran the 3 I have enough for them to screw up. My Typhon doesn't have 10 runs yet because of this stupid weather. But I've put both the Granite & Senton through the ringer & I've only replaced the shocks on both.well the car runs fine as far as power/torque but.... it burns through battt like crazy. I swapped the fuze 3800kv in just to test the cogging issues. ESC is fine though, so that's a good thing. So both batteries lasted just about the same amount of time. Roughly 6 minutes. Usually my larger battery will last over 20 minutes if I don't do a lot of speed runs. I received the Dynamite 2800kv in the mail today. I'll try it out tomorrow. Since the granite doesn't come with adjustable motor mount I was forced to use the 15t with the 3800kv today. I'm sure that played a role in battery usage. Well here's a video of today's abuse. I imagine this big hill is a huge stress for the motor. it sure does break parts pretty quick too.
video of my poopy/abusive driving on a big hill
6 minutes!? Even my dirt cheap floureon 3s 5500 lasts for 20-25 in my Granite BLX, stock of course. How is your ESC draining them so fast. That's just weird. I know these ESCs are junk. Maybe I haven't ran the 3 I have enough for them to screw up. My Typhon doesn't have 10 runs yet because of this stupid weather. But I've put both the Granite & Senton through the ringer & I've only replaced the shocks on both.
The heatsink is definitely doing its job. The 6s cars need a huge heatsink like that. Those cans can reach 170 on 6s & constantly thermal out the ESC. I never had a problem with ESC temps. Most ESC problems are with voltage regulation, mosfets making the caps turn fireworks, & the damn thing getting wet & shorting out.not sure.veven climbing that hill in the video my batteries lasted a lot longer. you think it's the 3800kv with the 15t pinion that burned through them so fast. did you see the motor/ESC temps at the end of the video
what temp is considered to high on ESC? what's the thermal cutoff point. got home and put the battery on the charger, charger said it was dead. So I guess the ESC didn't go out on thermal like I thoughtThe heatsink is definitely doing its job. The 6s cars need a huge heatsink like that. Those cans can reach 170 on 6s & constantly thermal out the ESC. I never had a problem with ESC temps. Most ESC problems are with voltage regulation, mosfets making the caps turn fireworks, & the damn thing getting wet & shorting out.
The thermal point of the ESC is the motor (180-212). The motor will make the ESC thermal out. Most ESCs don't even need fans. The wiring from the motor can also get as hot as the can itself. That's how the ESC monitors the motor tempswhat temp is considered to high on ESC? what's the thermal cutoff point. got home and put the battery on the charger, charger said it was dead. So I guess the ESC didn't go out on thermal like I thought
Register and gain access to Discussions, Reviews, Tech Tips, How to Articles, and much more - on the largest Arrma RC community for RC enthusiasts that covers all aspects of the Arrma-RC brand!
Register Today It's free! This box will disappear once registered!