Hey,




THNX

You quite often get that behaviour with whoops. Just increase the digital idle percentage value on the Configuration tab in BFC to something higher where all motors will spin without stuttering when armed.

Finally a simple solution, thanks. will do.

What is the recommended idle speed ?
I have set it to 9% and it still doesn't respond in every arming, and not all of the motors spin.
sometimes yes, sometimes not.
Also, a couple of weeks ago, before many crashes and repairs, the idle speed was 3% and everything worked fine.
Is there explanation why the whoops act like that ?

I've seen people using up to 12% before, especially with notchy motors, but if you yours used to be OK at 3% then it might be something else.

The first thing I would suspect is the motors. These tiny brushless motors don't have a particularly long life and if you've been flying them as much as it sounds like you have then it might be that the motors are starting to get worn out. This process is quicker with motors that use bushings instead of bearings. I'm not sure how the EMAX motors on the TinyHawk is constructed and whether it uses bearings or bushings. You would need to take one apart in order to find out.

One of the motors in particular seems to be struggling more than the others. Try swapping that motor to a different position and see if it behaves the same way. If it does then it's a worn or damaged motor.

Another thing to do is to spin up the motors using the Motors tab in BFC and see if any of them act or sound differently to the others.

I would also try taking the offending motors apart and cleaning them up in case some foreign debris are causing them to occasionally get caught up and stick. When you take them apart you will also immediately be able to see if they use proper bearing or brass bushings. Have a watch of the following video.

OK,
Looking into the motors, still not opened, I have discovered some reasons why they have difficulties to spin.
1. One of them has a hair in it. it spins, but I assume that in this tiny scale, everything has an effect.
2. One motor seems to have a circumference magnet that had slipped - probably my biggest problem right now - https://photos.app.goo.gl/VAagD8H1V5Dd2Sic8
3. One motor has something that looks like a black plastic piece that should not be there.
4. Thank god, one motor, seems without any weird thing.

I have watched the above mentioned video, It seems quite delicate project, to open up the motors and clean them, but I do not have any other options right now.
Do you have any tips on how to do it when you don't own a lab with any specialist equipment ?
Gluing the magnet - which glue ? Is it even possible to glue it to the right place ? any tips ?
It's so tiny....

waiting for your answers, and meanwhile I'll start searching videos in Youtube about taking apart these tiny motors.

THNX

You don't need any specialist lab equipment to open the motors. Just a tiny screwdriver to get the c-clip off and some tweezers. Make sure you don't let the c-clip ping off somewhere when taking it off or when trying to put it back on because they are tiny and I guess you probably won't have any spares, so if you lose it you will be in trouble.

I would try and use something like Loctite 480 or JB Weld to glue the magnet back on. The tolerance of the gap is critical so don't use too much or it will stick out too far and foul the stator.

THNX, I'll dive into it tomorrow.
BTW, I would like to show off that 2 days ago I had my first real FPV flight with my 5" real quad and it was a great experience after starting with the Tinyhawk S. It's much more stable than the THS, and it was just awesome experience.

Well done Yes, the larger quads tend to be easier to fly but they also come down harder in a crash and cost $$$ more to repair when they do