Archived: the OG noob question thread! 😀

[PixelatedPolyeurthan]

Can you inspect the jst connector. look at the wires going inside it and see if anything is loose, maybe a wire got pulled slightly.

[MarkOneBoards]

I even resoldered all connectors to be 100% sure.
I really dont get it, you guys are my last hope

[BillGordon]

We need a Rick. I’m just a Morty.

@mmaner
@Dareno

[PixelatedPolyeurthan]

We are just Morty’s*

[MarkOneBoards]

Im even thinking of taking the motor apart, but i really dont want to if i dont have to.

Btw updated vesc tool to latest version aswell, and was actin weird a bit yesterday.

[BillGordon]

I have had motors detect better in Ack than official Tool, and vice versa.

[mmaner]

Did you swap motors and see if the problem follows the motor or ESC?

[ZachTetra]

Just ran motor kv calculations 29540 ERPM / (36.4V * 7 pole pairs) = 119kv…but the motor is supposed to be 140kv, is that okay and did I get a free +18% torque?

[Mainflow]

looks like 5 pin JST XH or JST PH

It’s rather like a PA.

[b264]

Im even thinking of taking the motor apart,

What happens when you hand-test the motors while not connected to any ESC?

How to hand-test a BLDC motor

Sometimes if you’re buying used, or troubleshooting, and need a quick way to see if anything might be wrong, you can test a BLDC motor with only your hands. It’s not the most accurate test in the world, but catches most problems. [f5c1e17e62e9f244432bf763be93746978c88931%20(copy)] Verify the motor spins without grinding or rubbing. Put a tad of sideways stress on the shaft and push it and pull it (while turning) to verify it feels smooth. connect phase A to phase B and verify by hand-spinni…

I recently had a motor that consistently fails step 6 and which was smoking ESCs, but otherwise appeared normal.

[mmaner]

Do it without wheels for a truer calculation.

[ZachTetra]

How much should it go up if I do? I takes about 10 minutes to get the wheels on or off so I’d rather not

[PixelatedPolyeurthan]

It’s rather like a PA.

Thanks. i knew it wasn’t an XH or PH so i have been trying to google for the last 30 min
Danke!

[PixelatedPolyeurthan]

Did you swap motors and see if the problem follows the motor or ESC?

swap the left motor phase wires with the controlers right phase wires and same with the other motor and tell me the result

All done, its not the fsesc.
Still doesnt work when connected to the second esc.

Is that what you meant @mmaner

[mmaner]

I don’t know, depends on the battery, wheels, gearing, etc.

[mmaner]

Yes, if I’m understanding and the issue happens on multiple motors and a single ESC, then logically the ESC is the issue.

[MarkOneBoards]

I did your whole test method and nothing out of the ordinary.

And @mmaner it follows the motors.
Motor 1 on esc 1 = perfect
Motor 2 on esc 2 = problem
Motor 1 on esc 2 = perfect
Motor 2 on esc 1= problem

Tried with and without sensor, also did all manual checks.

On FOC the motor spins but on BLDC nothing happens.
When doing the setup for BLDC the motor spins up.
After setup = no reaction

I did the whole same procedure on the other motor and no issues.

[mmaner]

Ok, the the motor is the issue. Have you disassemble it? It could be a filled bearing offering too much resistance, a displaced or broken magnet, a partially disconnected phase wire, etc.

[PixelatedPolyeurthan]

Conclusion?
Faulty motor

[b264]

Try manually entering the detection results from motor 1 and driving motor 2 with those values. Assuming both motors are the same make and model and Kv