Kaideng K70C SkyWarrior Replacement Motor Issue

Hello All,

This is my first post so if I could do something better next time please let me know. I'm having trouble with my Kaideng K70C. It worked great out of the box, even when replacing the stock camera with a Xiaomi Yi Action Camera, which is noticeably heavier than the stock camera.

Eventually the K70 started having trouble staying airborne, and I had to manually pull it back and to the left, as it was naturally drifting to the front and right. After checking the resistance of each of the motors, I noticed that the front right motor had noticeably more resistance and made more noise when spinning than the other three motors. This led me to believe the front right motor had gone bad.

Since this copter is relatively new, I couldn't find any replacement parts for it, but saw that many people said X8C parts could be used in it, so I order these motors. I initially only replaced the one that was causing trouble, and after letting the motor warm up a bit, I took it out for a test flight. For awhile it was working perfectly, with as good a control as it had before the issue.

Then the quadcopter started drifting to the back and left, as if the new motor was more powerful than the others. After awhile I couldn't even get it to take off, so I hypothesized that either the new motor had been broken in and was more powerful than the others, or the back left motor was starting to go bad. Either way my next step was to replace all of the motors with the new motors.

The replacement motors came in two different types, A (black and red wire), and B (red and blue wire). I noticed in the comments of the motors that some people received one motor that was not spinning in the expected direction, and consequently had to solder the two wires in the opposite configuration. I seem to have experienced something similar.

Currently the two type A motors are on the front 2 arms, and they are spinning in the correct (opposite directions). The type B motors are on the back 2 arms, and they are spinning in the incorrect direction, but still spinning in opposite directions. I thought perhaps I could correct this by switching the back two (type B) motors, because if I could get them both to spin in the opposite direction that they were, everything would be correct.

Switching the motors, however, gave me the same result as before. So currently my situation is:

Front Left: Type A motor spinning CW
Front Right: Type A motor spinning CCW
Back Left: Type B motor spinning CW
Back Right: Type B motor spinning CCW

Any help getting this solved would be very much appreciated.

Hi mate back 2 motors are wrong it should be back left CCW back right CW just swap motors over

holtneil said:

Hi mate back 2 motors are wrong it should be back left CCW back right CW just swap motors over

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Thank you for the reply holtneil. I am aware that is the way it should be, but as I mentioned in the post, I have already swapped the two back motors, and it produced the same results. Any other suggestions?

The motors normally are colour coded on the wires to what side they fit maybe you have 2 for the same side you can try and swap wires over to get the motor to spin in reverse

I would prefer not to have to solder anything, as I don't have a kit for that as of now. However I do understand if that is the only thing that can solve my problem. The biggest thing I'm wondering is why swapping the back two motors didn't give me the desired result, if each motor spins in one specified direction dependent upon the configuration of the wires. It's possible I took them apart and mistakenly put the same motor back into the same motor housing, but I highly doubt that I was that careless. Can anyone shed some light on this for me?

The motors came from a different quad so the power to the motor from the quad may be reversed ,but not on yours

Well, my k70c fried a few days after I got it. At least yours still turns on. Great quad, though.

ultralight01 said:

Well, my k70c fried a few days after I got it. At least yours still turns on. Great quad, though.

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Yeah when it flies, it flies well. I have ordered some motors that are supposed to be specifically for the k70, so I'll see if those work. Did you ever find out what happened to yours?

No, I didn't. It simply stopped turning on one day, and I even ordered another battery to try. Nothing happened. I think my last option is to cut and twist together the switch wires and see if the power witch is broken.

ultralight01 said:

No, I didn't. It simply stopped turning on one day, and I even ordered another battery to try. Nothing happened. I think my last option is to cut and twist together the switch wires and see if the power witch is broken.

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A cheap multimeter can be very useful in determining your problems instead of just going out and buying new parts, batteries that you might not even need.

hello all , i have the same quadcopter. after it got twisted in my garden gate ( one prop guard got stuck on the top of the wooden gate ) i now have the problem where the front right propeller does not stop even when i press the on off button , the only way to stop it is to pull the battery off , the other 3 work ok when i use the controller , but the front right has a mind of its own , any ideas what can be causing this problem ? i have ordered 4 replacement motors as at first only the front right motor was running. the quad has from what i can see no damage so have no idea why the motor does not switch off like the rest do , the motor itself has no speed control and is a contant speed , the remote makes no difference at all to that right motor

We also had problems with the motor not working anymore and a replacement motor keeps going like Jer has also. It just keeps turning. I had already bought other parts which were not in the box when we first opened it and have bought the motors. The quad copter has cost me more money than the time we could use it.

I was thinking of throwing it away. We used it just 4 times. If the motor can't be fixed, it's useless.

Rogers said:

I was thinking of throwing it away.

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These quads have proved to be nothing but a money pit.

Yes I agree!