Camera configuration

try this in a terminal:
qtvcp -d -o camnumber=14 cam_align

(Purposely setting a wrong camera number)
Will display lots of info, but the last few lines should show working/nonworking camera numbers.

Smart people.

Looks like all the cameras are listed twice.

The ls /dev/video* showed.
0 1 6 7

So knowing the config was right, I tried them all and 6 it is.

Without this forum I'd be have given up years ago on LinuxCNC.

Just want to say all those of us who read everything on these forums appreciate your time and effort - even if we get lost with the most basics like 'the config folder', it seems obvious but an actual folder called 'config' exist so guess were my file was for a while .

I think, "/cncuser/linuxcnc/configs/mymill" would be fine.

Also the use of quotes, helps. For example I was not sure if the filename had leading dot or if it was just the end of sentence.

In the end its fine, but all the documentation assume these things are known to folks. So you read it and you go, yep I want that tab on. And then, no idea how to turn it on.

Another one of these, My camera is not centred on the lens / sensor.

If I spin the camera in the spindle it turns a beautiful arc just above the centre line.

I wonder how many cheap USBs have something similar.

So I changed the file. "/usr/lib/python3/dist-packages/qtvcp/widgets/camview_widget.py". look for the line "# draw red circles" and two lines below change the centre point from w//2 to what I needed.

The cheap camera is also flexible in its housing. I shoved it full of hot glue and that helped somewhat.

I can get the webcam focused about 1mm above the object which is great, However the focusing ring is also not centred so that was also glued.

I can now push the camera and still get about 0.3mm movement, so if I dont push it its kinda ok, But the cable can pull on the camera.

I hope these learnings help folks.

My question now is does anyone have a webcam that is more solid and centred. Or do I need to remove the hot glue and make a metal housing?

I've used a Logitech C270 and removed the clip and refocused it (see youtube). Made a 3D-printed holder attached to the bold hole that opens the spindle holder. I used hot glue to fix it, but I would be nicer to have printed holes to put screws in to tighten the cam. I can make a picture if you want.

Next thing, because of this nice compact construction my cam-output is flipt, on the X and Y axis. Can I just put a minus sign before the scale options to correct this? Of is there another way?

unfortunately no. but I'll add it into master branch.

Hello,

my Andostar squints like crazy.
But I can live with it, I put a flat mirror on the machine bed for alignment. The principle of angle of incidence equals angle of reflection makes it easy to find the right position.
I fixed everything on my camera that could be fixed, because the alignment fluctuates when I adjust the focus.
Cable was also specified accordingly.

Greetings Frank.