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I have flashed plenty of times with everything still connected ( but unpowered ). I think the issue might be that powering the board powers the Rx and some back current through M1. If your USB port is not up to the task the flash might fail or cause issues, if that is the case remove the wires and try again.
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1.5vQuote:
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New Quad
Hi
I have just completed my first quad using a KK2 LCD controller. It flies great with Emax 2822 motors and 20a HK Esc's. 8x 4.5 props . Presently using 2200ma 3s lipo's Can anyone tell me if it is possible to use larger Lipo's (3s) and if so,how large. Thanks |
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http://www.ecalc.ch/xcoptercalc_e.htm?ecalc |
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The larger capacity won't hurt anything. |
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I use 3000mAh (20C - good for around 60A) and 4000mAh (40C - used in a speedboat also, good for 160A) for my larger copters...
Check with the calc-tools how many Amperes your machine draws and align your battery to the needs.... (BTW: higher C-Rate = more weight as these cells have more density) Does this answer your question? |
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ATM I am more into larger quads - hey behave different compared to sport-quads... Hangar: WLToys V929 Miniquad XAircraft X450Pro (V1) + Compass&GPS X8-550 Quad(Octo) with Gimbal on AUX-Channel (KK2-Board) X-550 Hexa (KK2-Board) X-600 (KK2-Board) X-650 (DJI Naza+GPS) .... maybe more to come - Winter is cold in Austria ;-) |
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My son's KMAN Kopter used Emax CF2822 motors with 30A ESC and 3S 4000Mah LIPO with no problems. I do not think the emax CF2822 motors can handle 4 cells.
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Here is some specification about the Emax CF 2822.Quote:
EMAX CF 2822 Recommended props when using 3 cell Lipo batteries: The GWS EP9050 produces 30 ounces of thrust at 17 amps. Use with caution The GWS EP8040 produces about 24 ounces of thrust at 12 amps. Best all around prop for this motor. The APC 8x4E produces 25 ounces of thrust at 14 amps. The GWS HD8060 produces 22 ounces of thrust at 17 amps. Use with caution The GWS EP7035 produces 15 ounces of thrust at 7 amps. The APC 7x6E produces 19 ounces of thrust at 12 amps. Recommended props when using 2 cell Lipo batteries: The GWS EP1170 prop produces about 21 ounces of thrust at 15 amps The GWS EP1060 prop produces about 18 ounces of thrust at 12 amps. The GWS EP1047 prop produces about 19 ounces of thrust at 13 amps. The GWS EP9050 prop produces about 16 ounces of thrust at 10 amps. The GWS EP8040 prop produces about 12 ounces of thrust at 6.5 amps. Please be aware that the battery used can make a tremendous amount of difference in the performance of brushless motors. The above data was obtained using batteries in good condition that were fully charged. Thrust and amp draw may be less with the use of batteries rated at lower amp output, and slightly more using batteries rated for higher amp output. Other factors, such as ESC timing and variations in actual motor KV can affect the performance of brushless motors as well. We recommend the use of a Watt Meter to test the current draw of your particular power system, especially if you plan to use a prop that pushes the motor near it's maximum amp rating. EMAX CF2822 Specifications: Weight = 1.4 ounces (39 grams) Diameter = 1.1 inch (28mm) Length not including shaft = 1.2 inches (30mm) Shaft Length = 0.62 inches (15mm) Shaft Diameter = 3mm Bearing Size = 3mm x 8mm x 4mm Voltage = 7.2 to 12.6 KV = 1300 Current = 16 amp maximum for 60 seconds |
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Got my new ESC and the calibration went smooth. Like you said, it was operator error the first time.
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Hey, everyone.
I have a problem with my KK2.0. I am almost sure it is my fault, though. I have been flying my FPV quad for a few weeks now. I have had great luck with the KK2.0, except for the arming. I need to leave it on always armed as I can't get it to arm with rudder. I have made sure the rudder channel reads 100% in both directions on the RX test. But it still will not arm. This is on firmware 1.2. I have just updated to 1.5 to take advantage of autolevel, but there is no more always armed setting. Does anyone have any ideas how to arm the board? Thank you so much in advance. Will |
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