I'm having trouble with my brushless senton

[alex16]

Hi, i have an arrma senton with a cheap hobby fans Brushless motor and a BLX100 ESC brand new,the problem is when i turn it on it run for a few seconds normal, but then it goes slow until it stops, i can only steer. But if i turn it oof and on again, the same happens,runs good, slows down, stops and oly steer. I dont know what wrong with it, the batteries are new and fully charged, i think it migth be the motor, but i dont know

 

[DavidB1126]

What's the kv and size of the motor? Maybe it's too much for the esc. Or can be the battery with voltage drop tricking the LVC.

 

[332_RC]

I've had the same issue with my Senton & the BLX100 ESC. They have a high LVC & also 'brown out' easily. Seems there was a number of people reporting the exact issue. Mine did what you described. Good battery. Good motor. All looks right, cuts out. I ended up swapping to a different ESC, fixed it.
Oh--- Welcome to RCT!

 

[DavidB1126]

They have a high LVC & also 'brown out' easily.

Didn't think about that.
OP could set it lower or disable it, if the esc is programmable

Or yes a new esc should fix that issue. Hobbywing 10BL120 G2 (sensorless version) would be my recommendation. Personally I'd get the 3660 combo and keep the HW motor as backup.

 

[alex16]

Hi, i have an arrma senton with a cheap hobby fans Brushless motor and a BLX100 ESC brand new,the problem is when i turn it on it run for a few seconds normal, but then it goes slow until it stops, i can only steer. But if i turn it oof and on again, the same happens,runs good, slows down, stops and oly steer. I dont know what wrong with it, the batteries are new and fully charged, i think it migth be the motor, but i dont know

I forgot to mention, when it happens it starts to blink red

What's the kv and size of the motor? Maybe it's too much for the esc. Or can be the battery with voltage drop tricking the LVC.

It 3900kv

 

[Tunedfrog]

Is it Lipo or Nimh battery? Double check your esc and make sure it is set to the battery you are using.

 

[alex16]

I use a 3s lipo battery how do i check that?

 

[332_RC]

I forgot to mention, when it happens it starts to blink red


It 3900kv

Mine did that. It's a 3200kv but 3900kv is still fine. And I don't believe they are programmable & are discontinued from Arrma. Probably because of that reason.

OP could set it lower or disable it, if the esc is programmable
Or yes a new esc should fix that issue. Hobbywing 10BL120 G2 (sensorless version)

That's a great choice. Amain coupon LABOR20 shown. Great ESC

 

[alex16]

ill post a video of the issue

ill post a video of the issue

 

[332_RC]

Have you tried plugging the battery back into the charger & checking the volts per cell & balance per cell & battery %

 

[alex16]

Have you tried plugging the battery back into the charger & checking the volts per cell & balance per cell & battery %

Yea it fully charged

 

[Tunedfrog]

I use a 3s lipo battery how do i check that?

Your esc manual will show you.

 

[alex16]

Your esc manual will show you.

I checked is on lipo mode

 

[Tunedfrog]

Have you tried re-bind and re-calibrate?

 

[alex16]

Yeah

 

[tntpoof]

3900 kv on 3 cell hmmmm
and the quality of battery? how many runs? ir #s

I dont run any 540 > motor on 3 cells over 3300kv..I can gear a 3000kv to match a 3900 kv all day long and my takeoff speed will be greater than higher kv
Do you people do any type of research on motors esc batteries?

 

[332_RC]

I guess Arrma didn't research it either when they put a 100a / 3900kv in a RTR 3s Infraction. I've had one for years, no problems, still stock.

 

[alex16]

Mine was brushes and i made it brushless using the blx100 esc and a cheap hobbyfans motor

 

[332_RC]

Mine was brushes and i made it brushless using the blx100 esc and a cheap hobbyfans motor

Nothing wrong with that. 3900kv can handle 3s. I have those motors in other rigs, too, no issues. I think the BLX100 is probably the issue. They are hit or miss. Where did you get the ESC from?

 

[alex16]

I bougth it brand new from ebay

Nothing wrong with that. 3900kv can handle 3s. I have those motors in other rigs, too, no issues. I think the BLX100 is probably the issue. They are hit or miss. Where did you get the ESC from?