Hi,
Inspired by Forrest Frantz with his multicopter building techniques using glue only, no screws (see here) , helped by him and Jon on frame and motor aspects of the build, we achieved and built what I believe is a world's record : the lightest 2-axis brushless gimbal carrying a full HD camera.
I will post and share building details in the next few days here.
Cheers,
Hugues
Comments
Release changes that were done:
-Cutting unecessary carbon masts length on both pitch and roll axis
-Cutting unecessary servo cables length (keeping the standard end connectors)
-Cutting unecessary portions of the camera plate (was over-dimensioned)
I'm planning some more weight removal for an even lighter version 3. In the next release, will come:
-replace the servo wires (heavy wores) by lighter servo thinner servo wires
-replace the over-dimensioned 3D printed parts by lighter ones (size and infill ratio currently at 100% which is unecessarily (too) strong)
I closed comments as it becomes personal attacks from some people. Too bad.
This comment is not to distract from a very clever wood construction using scrap parts from other systems and turning it into a demonstration model. That feat alone is amazing and impressive. But I could similarly build a "gimbal" from a socket and ball using passive gravity to do what was demonstrated on the video. Would you call that a "gimbal"?
Hugues has clearly set the world record (weight wise and performance wise). But what is more important is that he did it in a way that does not take short-cuts and he did it in a way that is repeatable and durable for use on actual ships.
Would industry start cutting gimbals out of laminated basswood or parts from scrapped CD drives? I don't think so.
Will industry start using composite parts in a smarter fashion with motors specifically designed to handle the parallel moment of inertia of lighter weight cameras and gimbal builds? Absolutely. Hugues has not only set the world record, but he has shown industry how to improve technology.
Excellent. Well done. And thanks, Hugues, for showing the world a process that they will want to repeat.
Yes, I have helped this guy with advice in building this thing. So what?
YOU yourself have set the criteria for this world record! Not ME!
I cite you: "lightest 2-axis Brushless gimbal carrying a full HD camera".
By all means, the above build falls into your criteria. If this wasn't the category of your world record, don't blame me for your lazyness.
Oooh , OlliW you had to disclose everything and now we know you're not objective on this matter (and that probably explains your determination on proving me wrong). The truth is that you knew that the link you have posted is not a valid comparison : you knew these motors are not brushless gimbal motors and that the controller is not a standard brushless gimbla controller. The motors are those of a pS3 cd-rom player and were custom modified; they have a lack of torque to be used in real conditions and that it is a non standard custom controller for these non std non-brushless gimbal motors, because you were part of it ! Found here where OlliW is explicitly mentioned along with the proofs about the motors and controller : http://fpv-community.de/showthread.php?49560-Das-EagleEi-Gimbal-Pro...
I checked the weight of two standard 20cm servo cable (with only one plastic cap on one end) that I use in the build, and that weighs 6g (2x3g) ! That would put my build at 44g without them... So weight comparison requires indeed a very precise definition and I suppose I will be forced to give that precise scope in a record's application (for example : motor types : must be brushless gimbal motors, mjust be standard off-the-shelves components, must be full HD camera (any could do as long as it is at least 30 fps @1920x1080 pixels), must be 2-axis or more, must include camera attachment on gimbal, servo cables included, must be a standard controller (Alexmos or Martinez that anybody can get) if included in the build, etc.
@OlliW, I saw that too in my research. I discarded it as they made a laboratory build, not a build based on available off-the-shelves parts/commonents : custom manufactured motors, bare stripped without bell, no std servo cables, tiny bare wires that would rapidly break in real uses, ....
I continue to think, until otherwise proven that my build is the lightest based on commercially available and off-the-shelve standard components and parts that anybody can get a hold of and use.
@The Sun, everything is bonded either by glue (for example, the cf masts together, or the 3D printed motor mounts to thge cf masts, or by simple pressure, like the 3D printed motor bells). The controller is not part of the weight.
@Olliw
That gimbal design is really impressive. Seems much lighter than the one here judging by motors alone.
@hugues
whats all of it bonded together with? Is the controller inluded in your weight measurements?
@Hugues
you certainly have NOT done your homework ...
I missed the details in your post, thanks for mentioning, it clearly shows that the 50g includes only the arm, cam support and motors (https://api.ning.com/files/QxYZWE5p2qsX4T0Ieb88HGmpBgWvHLzy2jpvY8J74...*X6mDghLHGshmnefzq7JNL/weight1.jpg) ... no controller, no imu, no further cabling, etc.
now go with this video: https://www.youtube.com/watch?v=NtP7L5ZPwRU, took me 5 min to research
incl. controller
incl. IMU
incl. second arm
46 g without mobius
you want to continue to stand by your claims?
The stator of the roll motor has two pairs of screw holes, 12mm apart or 16 mm apart. These are used to fix the gimbal to anything that has the same screw holes spacing (2mm diameter screws). The aluminum frame of the video is just something I had available on the bench, it could be anything else that gets a good grip on the roll stator (except your fingers, too small of a motor)
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