Hi guys, I've got a question about a brushless micro quad I'm in the process of building.  I'm using a Raceflight Spark 4 and 1 ESC connected to a Piko BLX flight controller.  It's all connected correctly and the problem is that motor 1 (right-rear) won't spin up, motors 2-4 are fine.

All 4 ESCs are recognized and have been reflashed in BLHeli configurator, and I've done the following to try and identify the problem:

I've swapped motors 1 & 2 and problem remains unchanged, so I know that the motors are fine.

I've swapped ESC signal wires 1 & 2 on both ESC board out and flight controller in, and in both tests motor 1 now spins up and motor 2 doesn't.

So to me it appears to be an obvious issue with ESC 1 but before I contact Raceflight I thought I'd ask if anyone has had this issue and if it's definitely a hardware problem, or if it's possible that this could be caused by anything else such as a firmware issue?

I only ask this because the Piko BLX came flashed with Betaflight 3.2 which as far as I know is not a stable release yet?

Sorry if I misunderstood but if motor 1 works on ESC 1 when you swap the signal wire then wouldn't the FC's signal out be the fault?

(25-Jul-2017, 04:09 AM)Snuffypot11 Wrote: Sorry if I misunderstood but if motor 1 works on ESC 1 when you swap the signal wire then wouldn't the FC's signal out be the fault?

No, you probably didn't misunderstand, it's most likely my lack of knowledge lol.  My description was based on my thinking that the ESC signal wire was sending a signal TO the flight controller when in fact the opposite is true.  So thanks for the reply Snuffy, maybe I'll be able to figure this out after all.

could you swap the ESC as well to see if it's the FC or ESC?

(27-Jul-2017, 01:34 PM)Oscar Wrote: could you swap the ESC as well to see if it's the FC or ESC?

That's what I've done.  Actually, I've switched out both for a Lumenier 4 in 1 ESCs and Micro Lux V2 FC.  Hoping to finish soldering everything up tonight, so fingers crossed.