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Old Feb 01, 2013, 11:06 AM
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marcin.gala's Avatar
Joined Jun 2010
428 Posts
read what I write lol...I need motors to work this out.
No worry will be balanced ,can't do this without motors in hands.
If possible shorten tilt arms or drill wholes.
For left/right roll just fit engine in proper place behind U shape frame part..

If you get it here is what I will do after fitting motors ,finsd balance point and drill wholes. EASY ..
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Last edited by marcin.gala; Feb 01, 2013 at 11:11 AM.
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Old Feb 01, 2013, 11:11 AM
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Joined Aug 2005
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One point here that seems to have been overlooked unless it was covered some time ago, and that is the gimbal balancing method. Unless we use something like a dummy Bell then the magnets will influence the process quite dramatically.
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Old Feb 01, 2013, 11:13 AM
Make UAVs, not drones! ;-)
jazzboy's Avatar
Vancouver, BC Canada...eh!
Joined Feb 2010
643 Posts
Quote:
Originally Posted by marcin.gala View Post
read what I write lol...I need motors to work this out.
No worry will be balanced ,can't do this without motors in hands.
If possible shorten tilt arms or drill wholes.
For left/right roll just fit engine in proper place behind U shape frame part..

If you get it here is what I will do after fitting motors ,finsd balance point and drill wholes. EASY ..
Drilling holes to balance will be a nightmare. The gimbal design is good, just make a slot to slide on each axis and it will be fine.
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Old Feb 01, 2013, 11:23 AM
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Denmark, Capital Region of Denmark, CPH
Joined Mar 2006
2,410 Posts
I like it!

Simplicity at it's best.

However, you want your camera tray to be perfectly balanced on the tilt axis, lift the camera tray with the camera on it using two thumbtacks or similar, find the sweet spot where the tray spins freely, this is where you drill your holes.
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Old Feb 01, 2013, 11:27 AM
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Denmark, Capital Region of Denmark, CPH
Joined Mar 2006
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Quote:
Originally Posted by dennyrowland@mac View Post
One point here that seems to have been overlooked unless it was covered some time ago, and that is the gimbal balancing method. Unless we use something like a dummy Bell then the magnets will influence the process quite dramatically.
That's another reason for us wanting to use the least cogging motors as possible.

You should be able to balance it, even with a little cogging, I did.
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Old Feb 01, 2013, 11:45 AM
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[QUOTE=kinderkram;23981449]Woah! Can it get any better?

Most amazing imo is the smooth transition when he tilts the gimbal - before he throws the MWC into the bush.

Can it get better? not much but start working on an auto object tracker and really blow some minds.
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Old Feb 01, 2013, 01:00 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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Originally Posted by Breezemont View Post
A heat gun will melt the epoxy on the windings. I usually clamp a shaft in the vise, put the motor on the shaft, heat the windings until the epoxy is soft, and then it unravels fairly evenly.
The trick is to start with the top layer obviously, and when it gets too hard to pull the wires out hit it with the gun again.
If you break the wires it becomes a bit trickier.
I use the micro torch in the photo, pull the bearings and direct the flame inside the bearing tube with the "X" mount on and clamped in a vise. When the heat softens the epoxy from inside and the stator moves I pull it off with a gloved hand. Sometimes I screw the "X" mount to board or piece of metal with a hole in it.

And you can use the pinpoint flame, direct it at the point where the strands enter the epoxy and milk the strand bundle up a little at a time. The strands in the photo were lightly epoxied and were removed by momentary heating at the points of adhesion. That was on a D4023-850 motor.

This entire thread is about stripping epoxy coated windings....

Removing old windings? - http://www.rcgroups.com/forums/showthread.php?t=1709338

Do all you can to avoid damaging the original insulation coating on the stator, that insulation is hard to patch up and even harder to replace. With a bare stator you can get four shorts (one on each corner) with each turn of the wire...

Hot air guns, hot air plastic welders, micro torches, all kinds of things have been tried and/or used...

Jack
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Old Feb 01, 2013, 01:14 PM
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Germany, NRW, Dusseldorf
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Originally Posted by dennyrowland@mac View Post
Can it get better? not much but start working on an auto object tracker and really blow some minds.
Our coders are working hard on it. First code bits are ready for testing, combining the AQ's POI feature with the SBGC.

Stay tuned!
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Old Feb 01, 2013, 01:15 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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Here is a winding technique that might help. I use a home made device I call my 3rd Hand Accessory when winding motors. I put a snug fitting dowel through the bearing tube (bearings removed) to make handles on the stator, run the wire through the gasket material lined jaws of the 3rd Hand to apply some drag to the wire, and then pull a little wire out and roll the stator up the wire to get the turns on.

The tension lets you see and control the placement better and on the larger wire it is critical to getting the wire to lay flat and make snug turns. Keep the tension light enough that you do not stretch or break the wire.

On the light wire you are using here, you can use a book to tension the wire, just run the wire between the pages and maybe lay more weight on the book to control it.

I have posted tons of images on motors and motor windings. If you go to my (it is still bare) blog page and scroll down you can choose to see all the attachments as thumbnails and you can also see a list of the threads I've started.

Jack
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Old Feb 01, 2013, 01:18 PM
DiaLFonZo - UAV/Drone
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Canada, QC
Joined Oct 2007
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-- I want to wind a motor now --
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Old Feb 01, 2013, 01:40 PM
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Moscow, Russia
Joined Jun 2006
308 Posts
Quote:
Originally Posted by dennyrowland@mac View Post
The 4008 was a little more difficult .
Hi Denny, i think that 4008 is not a good choice! It has wery strong magnets and cogg a lot! At the same time 4006 has less cogging!
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Old Feb 01, 2013, 01:48 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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Originally Posted by Dialfonzo View Post
-- I want to wind a motor now --
Watch out! It is a mildly addictive pastime.

I want to build a multi copter... I'm thinking I should start with a tricopter so I can use the same props on all three motors. And I have three DAT-750 motors.
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Old Feb 01, 2013, 01:50 PM
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JussiH's Avatar
3rd stone from the sun
Joined May 2007
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Originally Posted by jackerbes View Post
I want to build a multi copter...
Watch out, multis are addictive....
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Old Feb 01, 2013, 01:50 PM
DiaLFonZo - UAV/Drone
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Canada, QC
Joined Oct 2007
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Originally Posted by JussiH View Post
Watch out, multis are addictive....



Damn... somebody should have told me that 2 years ago..
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Old Feb 01, 2013, 02:15 PM
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United States, CO, Gilcrest
Joined Feb 2009
807 Posts
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Originally Posted by Dialfonzo View Post

Damn... somebody should have told me that 2 years ago..
Would you have listened?
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