MCPX Brushless - works for 30 seconds then cuts out?

[Delarado]

As title really.

Finished my HP05 conversion this afternoon. Works great for about 30 seconds then cuts out completely. Needs unplugging and replugging to make it work again!

Im using the motor positive as the takeoff for the steve as i coudlnt find any info on where to solder the V2 board.

Anyone else had this issue?

[Delarado]

the pitch etc continues to work, just no motor output at all.

[Delarado]

Ps this is what happens when a brushless mcpx hits a kitchen chair! Crazy power!

[n00by]

hmm sounds a bit strange that, what cuts out, the 3in1, the ESC, what happens, maybe something overheating, hows the power wired up?

is that on the bench, have u had it in the air yet, what size of pinion are u running, i'd like to know if u get that setup and running fine if your using a 9t pinion. ah i see u had it in the air, ouch poor heli

you'll find the solder point in link below

Solderpoints different for the V1 and V2 board! - HeliFreak

edit:

ah i see u had it in the air, ouch poor heli

ok so no motor output, the ESC is it maybe overheating, what are u using?

[Delarado]

Its an XP-7a i think with an HP05 motor.... bought from this thread http://www.rcheliaddict.co.uk/sale/7...etup-mcpx.html

P.s I had to reverse the motor using the ESC program card. This wont of affected it will it?

I Also enabled soft start which seems to have done nothing!

[Delarado]

also whats the difference between soldering the yellow wire and plugging it into the motor output?

P.s its not 30 seconds its about 5!

[n00by]

it gives u better throttle resolution, hmm not quite sure what u mean by reversing the motor via the programming of the ESC but that doesn't sound quite right and is something i've not heard of being used before. if the motor was turning in the wrong direction you'd usually swap 2 of the 3 motor wires around.

is that a 9 tooth pinion cos its probably going to be a bit of a hassle to get that running correctly, even once u get this problem sorted out.

[ronny p]

Reversing the motor direction is fine, as i have done this on my spin conversion. However i had no luck using the Steve converter as my motor would not run although i was getting a signal. I am now using bobs servo signal output chip available from him at www.bobsworkshop.co.uk thus chip does not convert the signal but takes it direct from the receiver as a normal servo signal, so its just like pluging it in to a receiver. You can also run two leds for night flying one set flashing by using the gear channel travel adjustment i think?

How does your tail behave with the hp05?

My spin conversion sucks sometimes it fly ok other times it has the 90° tail kick.

My c05m gets loads of fights as its spot on.

Have you checked all your solder joints?
Sent from my GT-I9100 using Tapatalk

[Delarado]

Yeah its 9t, whats wrong with that? I thought i'd give it a go, im no pro so it cant be that bad?

Yeah motor was turning wrong direction, didnt know you could just swap wires around. The ESC has a motor reverse function so i used that. Maybe i'll unreverse it and re-solder the motor.

Dont really care about throttle resolution, I only ever fly at 200% anyway :P haha

thanks for help!

[n00by]

with a 9 tooth your headspeed is going to be rather high and the V2 3in1 seems to be very senstive to higher headspeeds, 8 tooth you'd probably get away with at 100% but 9 tooth i doubt it.

i say at around 75-80%+ throttle the servos well start to play up and the heli will became very unstable, if it doesn't your damn lucky because this is the case for most V2 brushless owners that put anything stronger than a C05 in

[Delarado]

Mine flies stable enough and the throttle curve seems to be flat. Not sure if its 100% but it seems to be really fast. But flies nice, until it dies.

I have dampened the 3 in 1 using silicone o rings though.

[Zeeflyboy]

My spin conversion sucks sometimes it fly ok other times it has the 90° tail kick.

This is vibration related. It always comes down to replacing either the main gear, main shaft or tail boom as far as I can tell. For me personally, replacing the main shaft with a mH solid carbon shaft fixed it. You may have a split shaft under the head - if you hold the main gear and twist lightly at the head is it really quite flexy? If so you need a new shaft... It can even come down to something as simple as a loose fitting head.


Delarado - weird problem... The motor reversing is no problem at all, that's not an issue. You only need to swap wires if the ESC doesn't support reversing the direction. Using the motor point also shouldn't be an issue since its obviously getting signal.

I would check all solder points, and also check your LVC settings in the ESC (if they are rpogrammable). What batteries are you currently using?

My guess is that you have the LVC cut off set too high and Perhaps combined with packs that aren't quite up to the job.

[miskin]

I would check all solder points, and also check your LVC settings in the ESC (if they are rpogrammable). What batteries are you currently using?

My guess is that you have the LVC cut off set too high and Perhaps combined with packs that aren't quite up to the job.

Thats what i was thinking.. Can you upload a picture of the wiring so people could take a look.

Here's mine but with the converter from RCdesignes converter

Also anything above 60% throttle is flat out 100%

Anthony

[n00by]

Mine flies stable enough and the throttle curve seems to be flat. Not sure if its 100% but it seems to be really fast. But flies nice, until it dies.

I have dampened the 3 in 1 using silicone o rings though.

nice one lucky u, hope u get this other problem sorted out.