Hi,

I am using DYS 30A ESCs with SimonK firmware for my APM based F450 quad. Two days ago all of a sudden one of the ESC started beeping continuously. I couldn't able to calibrate it by any means. Tried to calibrate with APM all-at-once method and individual calibration but no use. I have upgraded the firmware (TGY.hex) to the latest version but no use so I reverted back the old firmware on ESC. Is this due to faulty FETs? Is there any way to check them?

check your battery ,is this the esc you are using

Yes! This is the thing I'm using. Battery voltage is good. I have tried with 3 different batteries, same result.

Same happened here hold the ESC upside down and find the ic it is square in shape .press it . then the beeping will stop. Happens bcoz of loosening of the ic legs from the PCB tracks

Try it same happened with me several times b4 .and if you have some knowledge about opening it then cut the rubber remove the heat sink and solder the loose leg on the right track downside .I repeat if u have knowledge about electronics present inside then only open it.

Press the small  block of the ESC gently and if beeps pressure a bit harder

Did you use connectors between motor and esc? If then, check the connectors. Sometimes the connections may be loose.

If the IC is loose then there is no way I could have reflashed the firmware. I will check for any other loose components on the pcb. The connectors between motor & esc are fine.

Its is possible....  the mcu has several pins and not all are used for flashing purposes.

Ok. I've verified the entire PCB, there is no loose chip on the board. I think replacing faulty with new one is the only option left.

upload a video ,maybe anybody can help you!!

try replacing 3wire signal cable, may that will be the prob

As per the suggestions given below I have checked the cables (end to end continuity check with multimeter) & loose ICs on the pcb, but everything seems OK. Here is a short video.

http://youtu.be/cYJe2RDXjfc?list=UUf5IRxNFyCM4F7rn2LWttfA

try connecting it to the receiver of a tx and then try it if it doesnt work ,you have a faulty ESC but if it does work something wrong with the board.
p.s-if you dont have a tx you can use an arduino(if u have one)
regards
rohan

I have already tried to calibrate by connecting to ch3 of the receiver. Still it doesn't work.

faulty ESC then,buy a new one and if dont get one pm me
regards
rohan

Thanks. Temporarily I'm using my old Turnigy Plush 40A ESC on my quad along with other 3 DYS SimonK ESCs (mixed SimonK & non SimonK) & reduced ESC refresh rate in mission planner. Tested the quad indoors, so far it is OK.

good but using a different ESC may cause problems to the battery(ask somebody first if it is ok to use it like that).which motor are you using??what is the max. amps of the motor??

Each motor draws max 15A. The motors are purchased locally (non branded) 2212/15 930KV. I have programmed Plush ESC for battery type: NiMh, Low voltage cutoff: soft etc...

you should not even use a 30 amp esc forget about the 40amp(the 30 amp is meant for a 26 amp drawing motor(DYS 1400kv brushless motor)) ,it will harm the motor ,maybe you'll not notice it now but after some time your motor will get super hot and stop working (happened to me while flying a friend's plane) see this video :
you should use an ESC with rating 10-20% more than your motor's max. amp rating ,in your case use a 20 amp (if you want to use a 30amp ,ask somebody else first)
Because you have invested money in your project take all precautions as possible and maybe this is the reason that your ESC failed!!!
regards
rohan

I thought using a 30A ESC and drawing 15A from it is safe. Pls correct me if I am wrong.

Seriously, I have never heard about motor damage by using high amp rated ESCs. Anyways thanks for the info. I'll search over the internet regarding this.

This aint true. you can comfortably use a 40A esc if your budget allows even though your motor just uses less than 10A. its like having a 500liters water can in your backpack even if you drink like 2 liters a day. have used a 30A ESC on a motor that just uses 10A!!!. never heats up/buzz. its actually safer to avoid ESC burn outs.

Mixing simonk and non-simonk is seriously bad. even mixing simonk escs of same Amp capacity from two brands are not  recommended. same brand , same model, same Amps capacity, same batch is preferred.

Ashok.P

it only applies when you use a different prop or change some settings but everybody knows that these things are unpredictable so it is better to stay on the safe side ,i told you my experience and even when we went to the seller and told him your motor stopped in middle of the flight, he said "the motor and ESC you bought were not in a combo and were of different brands so you should have rather bought the one ESC given by the company " and after that i bought this motor with the ESC that was made for it...

So its the seller who played trick on you. any brushless ESC of higher capacity than the motor should work on any brushless motor on lower capacity. there isnt any combos in Ideal world. and there is some other reason for motor stopping in mid flight.

Ashok.P

sir the motor we used had 12amp or so max rating but as there was a shortage of a 20 amp esc we bought a 45 amp esc and after the plane crashed we took all the parts that were working including the esc ,which my friend used in his next project with a motor of max. rating around 35amps and it worked fine ,i dont know it was the seller or the esc that caused it but after seeing the video(which i mentioned above) we used an esc close to the max. amp rating of the motor and since then we havent experienced a problem ,and about the combo companies make combos after alot of R&D and are made for specific products ,every 30amp esc might not be same but it is safer to use an esc close enough to your motor's max amp rating as it doenst harm the motor plus has a greater capacity than the motor
i advised him because it is his money on the line ,if the quadcopter or what he is making crashes it will be his loss not ours
i know you are an experienced member of this forum but im commenting using my experience
regards
rohan