Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

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by TomHorsley
29 Mar 2011, 18:13
Forum: Help with this site
Topic: Please vote on new forum area: Build Logs
Replies: 5
Views: 9782

Re: Please vote on new forum area: Build Logs

I think the problem isn't which forums exists, the problem is a purely tree structured forum in the first place. Anyone make forum software like gmail with "labels" that can be assigned to posts (by authors or readers) so they can be in multiple areas at the same time and new labels can be added at ...
by TomHorsley
16 Mar 2011, 18:59
Forum: Scan Tailor
Topic: Scan Tailor doesn't compile with Qt 4.5?
Replies: 2
Views: 2365

Re: Scan Tailor doesn't compile with Qt 4.5?

From the Qt docs:

QPolygonF QPolygonF::translated ( const QPointF & offset ) const
Returns a copy of the polygon that is translated by the given offset.
This function was introduced in Qt 4.6.

I suspect that means it ain't gonna compile in anything earlier than 4.5 :-).
by TomHorsley
15 Mar 2011, 17:23
Forum: Cameras and Electronics
Topic: Camera Triggering
Replies: 42
Views: 68982

Re: Camera Triggering

Here's another possibility (that still needs SDM or CHDK): This test script can detect changes in light level by querying the Bv property (whatever that is): @title Bv test :loop press "shoot_half" sleep 500 get_prop 34 a print "Bv is", a release "shoot_half" sleep 500 goto "loop" end So, if you hav...
by TomHorsley
13 Mar 2011, 20:52
Forum: Software
Topic: My linux automation code is making progress
Replies: 8
Views: 6629

Re: My linux automation code is making progress

I haven't done much experimenting yet. I'm sure there are things I can poke and prod, but I'm wondering if this sounds familiar to anyone? I have just looked at the metadata in the image files, and the one taken by SDM has a much higher exposure time and ISO than the one taken manually, so that wou...
by TomHorsley
13 Mar 2011, 20:36
Forum: Software
Topic: My linux automation code is making progress
Replies: 8
Views: 6629

Re: My linux automation code is making progress

I've been updating the software as I go along, and I've actually gotten a config GUI dialog plugged in now (though I still need to make more stuff configurable). I have used the software to run my scanner, and everything functioned as expected, except for one little glitch I need to figure out. For ...
by TomHorsley
13 Mar 2011, 20:22
Forum: Scanners and Build Threads
Topic: Not exactly a build yet, but a start on one.
Replies: 27
Views: 9312

Re: Not exactly a build yet, but a start on one.

jck57 wrote:Dig the use of the multi-gang plastic box. Filing that idea for future use.
Plastic was essential: I had to cut all kinds of holes in it (but it is moderately soft and drills and files pretty easily).
by TomHorsley
12 Mar 2011, 20:23
Forum: Scanners and Build Threads
Topic: Not exactly a build yet, but a start on one.
Replies: 27
Views: 9312

Re: Not exactly a build yet, but a start on one.

I forgot I actually already had the ideal almost cart laying around. Adding some casters I had on hand made it a real cart, and now I have a finished product I was able to wheel next to the computer and test: http://home.comcast.net/~tomhorsley/hardware/scanner/pics/on-cart.jpg For some reason it re...
by TomHorsley
12 Mar 2011, 18:00
Forum: Scanners and Build Threads
Topic: Not exactly a build yet, but a start on one.
Replies: 27
Views: 9312

Re: Not exactly a build yet, but a start on one.

Well, I have achieved the milestone of getting finished with the scanner construction, but now I have the minor detail of figuring out how to get the scanner near enough to the computer to plug in the USB hub all the controls go through. Here's what the rats nest of wires looks like in the finished ...
by TomHorsley
11 Mar 2011, 23:02
Forum: Scanners and Build Threads
Topic: Not exactly a build yet, but a start on one.
Replies: 27
Views: 9312

Re: Not exactly a build yet, but a start on one.

And here's what most of the wiring looks like crammed into a blue plastic electrical box:

Image

I was relieved to find everything still working after all the man handling to get it fitted in the box :-).
by TomHorsley
10 Mar 2011, 12:53
Forum: Scanners and Build Threads
Topic: Semiportable build, and other beginner questions
Replies: 25
Views: 15980

Re: Semiportable build, and other beginner questions

I did parts of my build using 3/4" conduit and ground wire clamps for a "tinker toy" like effect: http://home.comcast.net/~tomhorsley/hardware/scanner/scanner.html It occurs to me that lots more parts of the scanner could be built the same way, and lots of pieces of conduit and clamps to hold it tog...