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HelicopterScale Model RC Helicopters › Another DJI Wookong scale project - assistance needed
10-29-2011 11:54 PM  6 years agoPost 21
ozghost1952

rrApprentice

Melbourne Australia

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Here are the Z settings +3 for GPS and + 7 for IMU

Will update and report back ....

Jeff

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10-30-2011 02:38 PM  6 years agoPost 22
UAVProducts

rrApprentice

Mchigan, USA

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From that picture you have your settings wrong.

The point you measure up is where the plum line crosses the mainshaft. That point is your True CG.

So measure up from that point to the middle of the IMU and GPS. They way you have it mounted they will be the same.

Keep ESC away from IMU if you can.

Robert
N.A. Dist for DJI
N.A. Dist. for PhotoHigher
Formerly DJIUSA

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11-02-2011 07:55 AM  6 years agoPost 23
ozghost1952

rrApprentice

Melbourne Australia

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Making progress!

Changed three things:
1 Corrected the Z settings
2 Moved the ESC lower to increase the distance from the IMU
3 Changed the motor to a 330KV to reduce the head speed to 1400 with 800mm blades

But still the white light continued to flash indicating vibration levels we still too high

So, back to the drawing boards .... installed a separate platform for the IMU and isolated it with four grommets / M3 capheads (see picture) and this solved the vibration problem – two further flights with not a single flash!

So now to get to learn to fly with ATTI mode. Initial experience is a little unnerving as the heli seems to be fighting my commands. My expectation is that if I put the heli into ATTI mode –once moving forward, feeding aileron / rudder will get it to bank -while maintain height and speed.

Is this correct?

What settings will give me more authority over the “mid stick position

Jeff

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11-03-2011 06:42 PM  6 years agoPost 24
Joel Rosenzweig

rrVeteran

Marlborough, MA - USA

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So now to get to learn to fly with ATTI mode. Initial experience is a little unnerving as the heli seems to be fighting my commands. My expectation is that if I put the heli into ATTI mode –once moving forward, feeding aileron / rudder will get it to bank -while maintain height and speed.
That's right.

If you want it to fight you less, then reduce the ATTI gain. It's best to put this on a slider or knob while you set it up so you can fine tune it while flying.

If you use ATTI mode, the controller will be trying to self level the helicopter. It does not want to keep the pitch or roll that you've input, because doing so, would keep the heli from reaching level. You're really flying by wire in this case, where the cyclic commands tell the controller what direction to go, but not how to get there.

If you want to fly normally, but with basic stabilization, use manual mode.

Joel

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11-04-2011 09:48 AM  6 years agoPost 25
ozghost1952

rrApprentice

Melbourne Australia

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If you want it to fight you less, then reduce the ATTI gain. It's best to put this on a slider or knob while you set it up so you can fine tune it while flying.
Thanks for this - please could you advise which settings to enable remote ATTI adjustment and how to connect to a channel controlled by a slider

I can see Front/Back Left/Right gains that have a remote adjust option with drop downs - but there is no indication of how this is connected to a "spare" channel

Jeff

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11-04-2011 04:03 PM  6 years agoPost 26
Joel Rosenzweig

rrVeteran

Marlborough, MA - USA

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Jeff,

I made a mistake. I've been playing with my WK-M (for Multirotor) so much recently, which does support remote gain adjust for the pitch/roll gains, that I forgot that the WK-S (for helicopter) does not support the same feature.

I don't know if it is DJI's intention to enable remote gain adjustment for pitch and roll on WK-S, or not. They only allow remote gain adjust for yaw at the moment.

You'll need to adjust the pitch and roll gains manually, through the setup software. Try lowering them in 10% increments to see how it feels.

Joel

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HelicopterScale Model RC Helicopters › Another DJI Wookong scale project - assistance needed
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