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Quad motors make unusual sound on the bench
#1
To New Pilots:

If your quadcopter/drone/multirotor is on your workbench with the propellers not installed, you will experience unusual sounds/shaking/movement and your motors will look broken.

DO NOT WORRY!

This is common and the reason for why this happens is because the motors and flight controller are expecting the propellers to be on. When you arm the drone without propellers installed, the drone thinks it is in the air with propellers installed. The drone does not know that it is sitting on a table so the motors begin to wind up as the drone is expecting the motors to be spinning at a certain rpm. This effect is amplified if you have AIR MODE enabled.

&tldr Install propellers and your drone should fly fine, if it does not. then you may proceed to post questions about troubleshooting the issue.
[-] The following 1 user Likes DragonFly's post:
  • voodoo614
#2
Just to add, it's also possible that the quad, while sitting on a hard surface, might receive additional vibration feedback or resonance which can especially result in motors stuttering.

Also be aware that all those symptoms (PID / noise effects) should not be present when testing motors via configurator motor tab only (not using the transmitter to arm/throttle up).
[-] The following 1 user Likes fftunes's post:
  • unseen
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#3
It's a fairly useful rule to say: Don't arm your quad on the bench.

The only time you arm your quad is when you are about to take off and fly. You don't need to test arming; it's a software function. If you have everything set correctly and have checked channel assignments and ranges in the receiver and modes tabs, then arming will work.

The Receiver tab is for testing the receiver, the Motors tab is for testing the motors (and ESCs). If the motors work fine in the motors tab, and your receiver works, that's all the bench testing that is needed which involves the radio and the ESCs/motors.

Maybe you might need to arm to test telemetry as it may not be active until the quad is armed, but if that's so then the only thing you should be testing is the telemetry function and not your motors.
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#4
You should add that if you are using an analog ESC protocol (oneshot, multishot) , ESCs calibration is needed. If digital (Dshot), just put on props and fly. Is there any way to make this a Sticky? This question gets asked just about everyday.
[-] The following 1 user Likes voodoo614's post:
  • unseen
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#5
(03-Nov-2017, 07:36 PM)voodoo614 Wrote: You should add that if you are using an analog ESC protocol (oneshot, multishot) , ESCs calibration is needed. If digital (Dshot), just put on props and fly. Is there any way to make this a Sticky? This question gets asked just about everyday.

While I agree with the sentiment, I doubt the sticky would make any difference. First, you have to know how to search for the information you need. Not everyone knows how to search the Internet effectively and if you don't really know the question, it's hard to search for the answer. Some people are just plain lazy and ask questions without thinking that they may have been asked and answered before. A sticky won't change that.

The only thing a sticky or FAQ tends to be useful for is so that people can post: "Did you read the FAQ?".

Stickies and FAQs are like pets. If you make one, you'd better be prepared to keep it fed with updates and clean out the stable from time to time. Smile
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#6
i will stick all the useful posts for now so I can maybe make an index of FAQ later Smile
i think there is already one, and we can build on it.
Don't be a LOS'er, be an FPV'er :) -- Blog - Facebook - Instagram - Twitter - Google Plus
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