Build KapteinKUKs Simple and Low Part Count Quad, Hex and Tricopter Flight Controller - Page 50 - RC Groups
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Apr 27, 2010, 07:32 PM
Quad Whisperer
Hands off hovering!

Quad Hands Off Hover And Some Flying (6 min 21 sec)
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Apr 27, 2010, 08:01 PM
The Drones are Coming!!!
cyborgcnc's Avatar
Quote:
Originally Posted by kapteinkuk


VERY VERY NICE!!! I also like the high speed passes...you are a VERY GOOD pilot!

I noticed in your latest version of code, that you increased the PWM frequency from 160 to 180Hz....what effect did this have on your Quad? is it more stable now as a result of that?

Any effects on the Speed Controllers, using this higher frequency? Just wondering...
Apr 27, 2010, 08:21 PM
Registered User
Quote:
Originally Posted by kapteinkuk
Hands off hovering!
Amazing, and brilliant. I'm very impressed.
Apr 27, 2010, 08:41 PM
Registered User
Excellent flying indeed!

KapteinKuk thank you for putting the gyro reversing feature in the software. I did not think I was going to need it but sure enough the +CCW sensing was not true for one of the axis on the gyro module and that feature made it an easy fix. I have another question for you. Are you still using a 35hz lpf on the gyro output on that quad in the video?
Last edited by pug398; Apr 27, 2010 at 09:06 PM. Reason: used wrong values for calculating cutoff frequency
Apr 27, 2010, 09:08 PM
Registered User
outsider787's Avatar
Quote:
Originally Posted by frank48
Hi

The original design needs 2 cw rotating props and 2 ccw, however on his latest mini quad the front and rear motors are tilted to the right. All props are the same and rotate in the same direction.

Cheers
Frank
What is the angle of tilt for the motors?
Apr 27, 2010, 11:04 PM
That tree again!!!!
thanhTran's Avatar
Quote:
Originally Posted by kapteinkuk
So AWESOME. Thanks for the vid Kaptein
Apr 28, 2010, 04:47 AM
Went to mow a meadow
frank48's Avatar
Quote:
Originally Posted by outsider787
What is the angle of tilt for the motors?
About 3 degrees, see here -

https://www.rcgroups.com/forums/show...1#post14843821

Cheers
Frank
Apr 28, 2010, 04:49 AM
Went to mow a meadow
frank48's Avatar
Quote:
Originally Posted by kapteinkuk
Hands off hovering!

]
Absolutely fantastic!

What are the flashing LEDs at the centre of the quad?

Cheers
Frank
Apr 28, 2010, 03:58 PM
Registered User
kapteinkuk - could you please have a quick peek at the Eagle files I posted? Just a cursory glance to make sure there's nothing majorly faulty about the schematic or layout.

I'm getting twitchy with the etching materials lying around and I'm probably going to give it a go soon anyway

Awesome video by the way!
Apr 28, 2010, 04:38 PM
Quad Whisperer
Quote:
Originally Posted by cyborgcnc
VERY VERY NICE!!! I also like the high speed passes...you are a VERY GOOD pilot!

I noticed in your latest version of code, that you increased the PWM frequency from 160 to 180Hz....what effect did this have on your Quad? is it more stable now as a result of that?

Any effects on the Speed Controllers, using this higher frequency? Just wondering...
Thanks

I did not see any change with 160 th 180 Hz.

Using high PPM frequency lowers the ESC's response time.

See attached scope screenshots. It shows a turnigy plush 30a ESC's response to a instaneous increase in throttle from low to full.

Red trace: motor current.
Yellow trace: PPM signal

A doubling in PPM frequency halves the ESC's response time, thus makes it possible to use higher gain, and therefore making the quad more stable.

This ESC and other I have tested uses a finite response low pass filter on the throttle.

The filter has 7 steps at the biggest difference in the throttle, less at smaller differences.
Last edited by kapteinkuk; Apr 28, 2010 at 04:48 PM.
Apr 28, 2010, 04:39 PM
Quad Whisperer
Quote:
Originally Posted by quaddynamics
VTOL RC AVATAR SCORPION Prototype model


please watch the above line .. amazing stable with 2 motors and 2 sevos ..

i think this would be very easy for master kapteinkuk.. may be he can pipe line this project too..
I will add this last in the pipe
Apr 28, 2010, 04:42 PM
Quad Whisperer
Quote:
Originally Posted by pug398
Excellent flying indeed!

KapteinKuk thank you for putting the gyro reversing feature in the software. I did not think I was going to need it but sure enough the +CCW sensing was not true for one of the axis on the gyro module and that feature made it an easy fix. I have another question for you. Are you still using a 35hz lpf on the gyro output on that quad in the video?
Yes, it is still a 6.8kOhm resistor with a 0.68uF capacitor.
Apr 28, 2010, 04:44 PM
Quad Whisperer
Quote:
Originally Posted by frank48
Absolutely fantastic!

What are the flashing LEDs at the centre of the quad?

Cheers
Frank
It is a hobbycity lipo alarm.
It is a must instead of waiting for one of the ESC's LVC to kick in
Apr 28, 2010, 04:45 PM
Quad Whisperer
Quote:
Originally Posted by ben123
kapteinkuk - could you please have a quick peek at the Eagle files I posted? Just a cursory glance to make sure there's nothing majorly faulty about the schematic or layout.

I'm getting twitchy with the etching materials lying around and I'm probably going to give it a go soon anyway

Awesome video by the way!
I will do that tomorrow, now I am tired, have been making a SMD PCB layout.
Apr 28, 2010, 04:53 PM
Multicopter Addict
braindead4554's Avatar
Quote:
Originally Posted by kapteinkuk
I will do that tomorrow, now I am tired, have been making a SMD PCB layout.
Sweet!! Can't wait to see how it turns out. I'm interested in making one myself.


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