3 Motors Not Spooling Up On Quad

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spudman49

Member
Fellas, building a 600mm quad, new motors, esc's, kk2 board, wiring. Problem is, when first making sure motors all start at the same time, 3 of the 4 just sit there and kind of vibrate and hardly do nothing, while 1 works perfectly. This is my 5th quad build from a 380mm, 3-450mm and this 600mm. All the other quads have worked just fine with just some minor tuning problems but nothing like this. Has anyone run into this problem and if you have, what is the fix. Any info would be appreciated. Thank you The Spudman
 
Hi mate what Jackson said is the first thing to try , if its not that make sure the solder joints are ok as brushless motors are 3 phase so all the 3 main leads have to be soldered right
 
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