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ghawkins
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Review: Graspinghand gooseneck camera mount

Mon Jun 17, 2019 7:12 pm

This camera mount is very simple so there's not much more to say than that I found it to be excellent and I'm surprised this kind of mount isn't more popular. This mount is made by Graspinghand, is called the Scorpi B+ and can be found here.

Image

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You can easily position your camera module to point exactly where you want, as shown above.

The mount comes nicely packed:

Image

There's a nut and two nylon washers for attaching your camera module. I always like nylon washers - especially as I've heard stories of people shorting certain camera modules via the mounting holes (nylon washers should minimize this risk).

I don't know how the gooseneck is made - I assumed it would just be something like a stiff piece of copper wire, but it's much nicer than that. It's very easy to flex into any position you want and (unlike many cheap gooseneck lamps) it really stays put in the position you choose.

Image

You plug one end into one of your spare USB ports - as you can see above, the end of the mount that plugs into the USB port isn't a full connector - it's essentially just the top of a connector.

If you look at a USB port you'll see there's a plastic chunk in the upper half of the port:

Image

So you just slide the "foot" of the mount in above this chunk:

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I.e. it just ends up where the top side of a full USB connector would end up:

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It's easiest to insert both the mount and the camera module and then bolt them together.

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Put on the first washer:

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And then the camera module followed by the second washer and the nut:

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Tightening the nut is much easier if you have a 4mm hex-socket driver (I got mine in a set like this from UnmannedTech or Banggood).

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I'm surprised this kind of mount isn't more popular - with most other mounts you have to come up with something to attach the mount to, and then work out how to angle it to point in the direction you want. I first searched for this kind of mount without knowing if anyone produced them. I actually found this cheaper model from ModMyPi first - but it's been out-of-stock ever since I came across it a few months ago, so I don't know if they'll ever restock.

There are various people selling something similar that plugs into the audio jack rather than a USB port - but this has the obvious issue that an audio plug is fairly free to rotate in the audio jack, which isn't what you want (and indeed various reviews I've seen complain about this happening).

The Scorpi B+ is surprisingly well made - sure it's very simple, but it looks like it might be hand made (and well hand made). At any rate, it's a nice change from the low production standards that are common for third-party Pi add-ons.
Last edited by ghawkins on Tue Jun 18, 2019 6:01 pm, edited 1 time in total.

jamesh
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Re: Review: Graspinghand gooseneck camera mount

Mon Jun 17, 2019 10:16 pm

Don't see many Pi's that old in the wild....that looks like one of the very very early ones.
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HermannSW
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Re: Review: Graspinghand gooseneck camera mount

Tue Jun 18, 2019 9:41 am

ghawkins wrote:
Mon Jun 17, 2019 7:12 pm
and I'm surprised this kind of mount isn't more popular.
I am surprised as well that I have never seen it mentioned on this forum (perhaps I just missed that) as that holder is avaibale for 5 years now. On German amazon it is currently unavailable.
It's very easy to flex into any position you want
I think that this is a plus for this (<20cm long) camera holder. I use 4×25cm arm realacc soldering 3rd hand with aluminum alloy stand, for less than double the price. I can bring the arms into any position, but fine adjustment for the last millimeters is not easy (but possible):
https://www.banggood.com/Realacc-Four-A ... 61215.html

The plastic around the crocodile clamps allows to just mount any electronics including PI camera boards:
viewtopic.php?f=43&t=241418&p=1481286#p1481286
Image
Last edited by HermannSW on Tue Jun 18, 2019 10:08 am, edited 3 times in total.
⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://gitlab.freedesktop.org/HermannSW/gst-template
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Re: Review: Graspinghand gooseneck camera mount

Tue Jun 18, 2019 9:55 am

jamesh wrote:
Mon Jun 17, 2019 10:16 pm
Don't see many Pi's that old in the wild....that looks like one of the very very early ones.
Looks like a B1 Rev 2 to me. It has the extra GPIO connector. I have one of those, as well as a couple of the earlier ones.

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Re: Review: Graspinghand gooseneck camera mount

Tue Jun 18, 2019 5:57 pm

I wondered if anyone would pick up on the ancient Raspberry Pi used to model the camera mount. It is indeed a Raspberry Pi 1 Model B, revision 2 (bought back in August 2013) - well spotted.

It still works perfectly - running the latest version of Raspbian. it's my spare that I use when I just to need to try out something quickly.

The Gorillapod style flexible arms with crocodile clips, that HermannSW mentions, looks good - but I do like that the Scorpi B+ mount is directly attached to the Pi itself. This is great if you want to move the Pi and the camera around together.

This is actually the real setup I have with the Scorpi B+ where the camera and SBC (a Jetson Nano) are moving around together on a small two-wheeled robot (a Pololu Romi).

Image

And yes - it seems to work out well enough, I thought the "arm" might bounce about too much when the thing is in motion but it seems to be OK.

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HermannSW
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Re: Review: Graspinghand gooseneck camera mount

Tue Jun 18, 2019 9:33 pm

ghawkins wrote:
Tue Jun 18, 2019 5:57 pm
And yes - it seems to work out well enough, I thought the "arm" might bounce about too much when the thing is in motion but it seems to be OK.
Nice, but usability depends of speed of robot (and whether running on flat surface, or off road outside).

For my first caterpillar robot platform I fixated the camera on tilt servo on top of a lego pieces bridge onto robot to avoid bouncing (view 4-115cm ahead of robot). That robot did run with maximally 2.5m/s, and can do already automatic tilt calibration via modified raspiraw code:
https://forum.arduino.cc/index.php?topi ... msg3450445
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New caterpillar T101 robot will run at up to 5.1m/s (18.36km/h). I think at least for these speeds a fixed mount of camera is needed (as well as high framerate capturing , 90fps video will give a frame only every 5.5cm which might be too slow for running curves coming).
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Caterpillar robots can run curves really fast, this is real speed video of full U-turn in less than 0.5s:
https://www.youtube.com/watch?v=O2TfISReN8k
Image

I will buy a Graspinghand gooseneck camera mount when it becomes available again on German amazon, but not for my caterpillar robots (I have 2-wheel circular robots as well).

P:S
ghawkins wrote:
Tue Jun 18, 2019 5:57 pm
I wondered if anyone would pick up on the ancient Raspberry Pi used to model the camera mount. It is indeed a Raspberry Pi 1 Model B, revision 2 (bought back in August 2013) - well spotted.
My first Pi was a Pi Zero, with 512× memory size and 1024× speed of my first Sinclair ZX81 computer (1KB memory, 1MHz) from 1982 ...
Last edited by HermannSW on Wed Jun 19, 2019 7:42 am, edited 1 time in total.
⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://gitlab.freedesktop.org/HermannSW/gst-template
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rpdom
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Re: Review: Graspinghand gooseneck camera mount

Wed Jun 19, 2019 5:03 am

HermannSW wrote:
Tue Jun 18, 2019 9:33 pm
My first Pi was a Pi Zero, with 512× memory size and 1024× speed of my first Sinclair ZX81 computer (1KB memory, 1MHz) from 1982 ...
That is 524288x memory size (the Pi Zero has 512MB, not 512KB), and although the CPU clock speed is 1000x it is a lot better at processing instructions so runs several times faster than that.

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ghawkins
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Re: Review: Graspinghand gooseneck camera mount

Wed Jun 19, 2019 7:54 am

HermannSW - those caterpillar robot images/videos look super impressive. I hope my robots will one day be performing like that. The GraspingHand mount works fine on my setup where the robot is just tootling around at low speeds. But of course I'd expect a thin long-arm mount, like the Scorpi B+, to wobble about in a more aggressive/speedy environment - but it's nice to get started with.

If you want one I don't think you need to wait for it to be available on Amazon.de again - I just ordered it direct from the GraspingHand website. It's an extremely minimal site but the shop aspect of things is handled by BigCartel (a maker-oriented sales platform).

I'm in Zurich and I ordered one some months ago and another a few weeks ago - both arrived within a week or so.

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Re: Review: Graspinghand gooseneck camera mount

Wed Jun 19, 2019 9:12 am

ghawkins wrote:
Wed Jun 19, 2019 7:54 am
I just ordered it direct from the GraspingHand website.
Thanks, just bought one (9.95€ plus €3.60 shipping).
⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://gitlab.freedesktop.org/HermannSW/gst-template
https://github.com/Hermann-SW/fork-raspiraw
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Re: Review: Graspinghand gooseneck camera mount

Fri Jul 05, 2019 12:06 pm

Today I got Scorpi B+ and tried it, with the first camera module I found and that was a v1 NoIR camera with 70mm lens:
Image


Scorpi B+ is really dangerous with v1 NoIR clone camera!
I first screwed the lower mounting whole and did not realize immediately that the Pi 3B did reboot.
I realized that when thinking "why is the gooseneck so warm".
Gooseneck mount seems to be connected to GND in USB port.
And v1 NoIR camera clones do put power on the mounting holes for directly connecting and powering NoIR leds.
I think to have read that Raspberry v1 camera never did so, and that is not recommended.
Anyway, connecting on the top GND mounting hole worked fine.

I think that adjustment works easier with "normal weight" cameras.
With the 70mm lens adjusting to some spot on 30m distant roof of house on other side of street was not that easy:
https://www.youtube.com/watch?v=3JUIatK ... e=youtu.be
Image


And even after adjustment the gooseneck was shaky a bit when just standing up.
But its good to have it, will try with more lightweight camera modules later.

P.S:
I made gooseneck camera mount with 70mm lens part of WoodenBoardPi for mobile operation:
https://www.raspberrypi.org/forums/view ... 9#p1550239
Image
Last edited by HermannSW on Fri Oct 11, 2019 10:29 am, edited 3 times in total.
⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://gitlab.freedesktop.org/HermannSW/gst-template
https://github.com/Hermann-SW/fork-raspiraw
https://twitter.com/HermannSW

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Re: Review: Graspinghand gooseneck camera mount

Fri Jul 05, 2019 1:31 pm

HermannSW wrote:
Fri Jul 05, 2019 12:06 pm
Scorpi B+ is really dangerous with v1 NoIR clone camera!
I first screwed the lower mounting whole and did not realize immediately that the Pi 3B did reboot.
I realized that when thinking "why is the gooseneck so warm".
Gooseneck mount seems to be connected to GND in USB port.
And v1 NoIR camera clones do put power on the mounting holes for directly connecting and powering NoIR leds.
I think to have read that Raspberry v1 camera never did so, and that is not recommended.
Anyway, connecting on the top GND mounting hole worked fine.
Those would be the clones that thought supporting IR LEDs attached through the mounting holes was a good idea then.
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