Took a bump flying in the basement and the two front motors of my fractal65 stopped spinning. They feel 'gummed up' like I can spin them with my finger but they're harder to spin. No feeling of grit and they look clean. Thoughts on the issue?

Disassembled the motor and it seemed to turn smoothly until I put the bottom clip back on then the gummy sluggish turning returned.

Bent shaft?

I read that smaller motors are notoriously fragile in comparison to the bigger stuff. Maybe the shaft is no longer straight.

Failing that you could whack some wd-40 in them if you have any around and see if it's a bearing issue, if they have bearings.

What motors? Emax Tinyhawk freestyle motors have 2 shafts fitted together and sometimes they will slip/bind.. I have some 1408 flow motors doing the same.. if I tighten the prop nut to tight it will start to “bind”..so I loosen the nut, give it a slight “rap” and snug the nut (lightly) and it’s good

They're happymodel 0802 26000kv
I was wondering if it was bent shaft or damaged bell. Just so small I can't see any damage to either. Not sure if that sticky slow sluggish feeling of me rotating the motors with my finger is indicative of anything. Planning to replace the motors as soon as I get home, but wish it was as simple as cleaning them or something. Oh well. Will save them for spare parts.

im not able to understand enough.
does it need more force to spin the motor by hand?!

if yes, unplug the motor and try to spin again by hand, i it spins freely as tve others than, it would be a sign for a damaged esc.

The two effected motors will not spin when 'armed'. There is some movement and an attempt to spin. With no battery attached, moving the motor with my finger there is resistance. I have had sand or grit in a motor before that expresses some grinding or crunching symptom, but the feeling here is different, its as if there is a tacky substance in the motor that makes it feel like the motor is sluggish as rotate it with my finger. I am guessing damaged bell, but not sure.

You said, "The two effected motors will not spin when 'armed'. There is some movement and an attempt to spin."

I had exactly this same problem with two different brand-new AcroBee65s, never crashed. The problem was the plugs on the motor pigtails.

So, on one AcroBee65 I clipped off the plugs and soldered the wires directly to the FC pads. That solved the problem.

Then, on the other AcroBee65 I clipped off the stock plugs and soldered non-NBD JST 1.0 plugs to the wires. That solved the problem as well.

You need clean, full voltage to the motors.

Your problem could be the same, but could be other things. In ESC Configurator the startup power could be too low.

All that said, since you said it happened after a crash, I would suspect something physically bent or damaged. Probably best to scrap the motors and replace with new ones. It is really hard to spot physical damage on these tiny motors.

(26-Dec-2023, 04:35 PM)segler999 Wrote: You said, "The two effected motors will not spin when 'armed'. There is some movement and an attempt to spin."

I had exactly this same problem with two different brand-new AcroBee65s, never crashed. The problem was the plugs on the motor pigtails.

So, on one AcroBee65 I clipped off the plugs and soldered the wires directly to the FC pads. That solved the problem.

Then, on the other AcroBee65 I clipped off the stock plugs and soldered non-NBD JST 1.0 plugs to the wires. That solved the problem as well.

You need clean, full voltage to the motors.

Your problem could be the same, but could be other things. In ESC Configurator the startup power could be too low.

All that said, since you said it happened after a crash, I would suspect something physically bent or damaged. Probably best to scrap the motors and replace with new ones. It is really hard to spot physical damage on these tiny motors.

A lot of older Emax tinyhawks had the same issue when arming… direct soldered the motors fixed the issue..
Don’t think it the issue here..(could be), but after a crash.. I’m guessing either damaged or trash in the motors

if you unplug the motor and "resistance" isnt there anymore, its a sign for a dead esc.
a bad plug could be an issue either, but like you described it, it sounds line two dead escs and a board to sortout therefor sadly hopefully im wrong, and both motors resistance is still there after deattached to the esc