I am fairly new to software development and want to get started. I am building a 3D scanner as a project. I want to write a plugin that will allow the use of two cameras for faster scanning to challenge myself. Does anyone have any pointers to resources that may help?

Thanks

I connected MO from the board to MI from the ring.
Someone would have any idea ?
Thanks in advance.

Very new to this forum so forgive if this is the wrong place to ask this question. 

I am trying to figure out the maths / code on how a point cloud in generated when a 3d laser line scanner is scanning a part on a rotary table?

So my main questions are

1. Assume the laser and the camera are calibrated to each other, how do you take into account the angle of the rotary table with respect to the 3D sensor for each scan acquisition?  It is just a rotation around z for the camera by the angle that the rotary moves for each scan taken?
2. Do you need to know the rotary center?
3. Do you need to calibrate the rotary rotation and translation matrix with respect to the camera?

Thanks in advance

Before I start trawling is "Das 3d-Scanner-praxisbuch" available in English? or in a format that can be translated? my German is awful I'm afraid and it looks like it could be really useful.

Cheers

In short i do not know the angle the camera takes pictures - i would point it directly towards the rotary table.

Now of course a scan takes way longer then - but that's not a problem at all.

Is there a simple way to get this working?

Please note - not as important as the nema34 motor for a larger rotary table - as the objects we want to scan (friend of mine has made a few objects - he is a talented artist/painter - and he likes to scan them) do not fit on the current rotary table. The linear movement i would do with a nema23 that rotates a simplistic cheap chinese C7 ballscrew which i have left. All this is overkill to move a lightweight camera and lightning board yet i happen to have it here so why not use it. 

Driving the nema34 and nema23 then would be done by linuxcnc preferably as it steers those motors so nice.

Note i also have other electronics that can do the job like smoothieboards and similar yet price of that parallel breakout board is dirt cheap. Like 5 dollar or so on ebay including shipment and old computers are for free. Whereas those other electronics boards i have are ranging in price from 120 to 200 dollar/euro. Too much in case someone else also wants to build something similar.

What would be needed for adding a nema34 for rotary board and build tad larger rotary board?

i have some options here to run a nema34. yet what would be simplest to work in fabscan software?

idea here is: PC computer ==> parallel port (same manner i run cnc milling machines) ==> nema34 motordriver (with its 60 volts psu @ 350 watt) ==> nema34

for the r-pi same PC computer <==> network cable <==> r-pi ==> hat

Is there simpler manner or other manner that would be software wise easier or cheaper?

Suggestions?

Kind Regards,

Vincent Diepeveen

I download version 0.92, my other configs are Raspberry 3 and PICAM 5mp. First step sd Image done, boot, ok.. 

I modify default.config.json like ciclop.config.json.. Well.. With original Bq Bt328 mainboard, baudrate 14400 or 115200 didn't work (correct "baudrate": 19200 and "flash_baudrate": 19200) with this changes fabscan start.. But..................... Last problem...

Lasers and base don't move with firmware 0.92... I put ("autoflash": "False") and I try "https://github.com/mariolukas/FabScanPi-Firmware", I modify "boards.h" with board (" #define MOTHERBOARD BOARD_CYCLOP") I upload file, but nothing..

It's possible that no one has tested the original Bq Ciclop and something it's wrong with this board?? fabscan version 0,92 have some bug?? Or maybe I'm doing something wrong??

Thanks for all! and forgive a noob! ? 

I have source for version 20200305 (from github: https://github.com/mariolukas/FabScanPi-Firmware/blob/master/FabScanArduinoFirmware/Version.h)

, but the hex version included with the raspbian lite image is 20200624.

Where can I find the source for 20200624 ?

Development would be easier if we have a dummy driver for the camera device and the serial connection. Such drivers would allow to run the FabScanPi-Server without the hardware. 

https://github.com/mariolukas/FabScanPi-Server/tree/develop/src/fabscan/scanner/laserscanner/driver

What i have in my mind is:

Dummy cam driver: 

A camera class which is implemented such as the one for the picamera, but it should grab the images from a folder instead of a camera. This folder should keep different plain pictures which i will make with the fabscan hardware. One set during a scan and one set during the settings window is opened.

Serial dummy driver:

The serial driver is quite easy, it should be a the serial driver as it is now but only as a stub/mock which will do nothing expect to confirm that the message was send.

Both dummy drivers should be encapsulated in a way that you can set the driver in the config. There is already something like that for the camera driver, because in an early stage of implementing that i experimented to write a driver for usb cams (parts of this code are still there).

I think that might be an excellent entry point for you and it will help us all and especially the guy who is developing the current frontend version because he does not own a working hardware setup at the moment. I would appreciate that.

By the way we are the only core developers by now :)