#robotics Logs

Dec 29 2012

01:13 rue_house I put sensors on my reprap
01:13 rue_house !assist projects/reprap
01:13 tobbor Possibly http://eds.dyndns.org/~ircjunk/projects/reprap
01:14 rue_house http://eds.dyndns.org/~ircjunk/projects/reprap/p1040802.jpg
01:14 rue_house http://eds.dyndns.org/~ircjunk/projects/reprap/p1040804.jpg
01:14 rue_house ^^ Y
01:14 rue_house http://eds.dyndns.org/~ircjunk/projects/reprap/p1040805.jpg
01:14 rue_house http://eds.dyndns.org/~ircjunk/projects/reprap/p1040806.jpg
01:15 rue_house ^^ X
01:15 rue_house er, thats Z
01:15 rue_house hah
01:15 rue_house http://eds.dyndns.org/~ircjunk/projects/reprap/p1040809.jpg
01:15 rue_house ^^ X
03:48 Tom_itx rue_house, you're closer than me to getting one
03:56 rue_bed :0
03:56 rue_bed so, the 3 jaw is out by 7 thou
03:57 rue_bed _7_
03:57 rue_bed wtf?
04:04 Tom_itx so loosen the backplate bolts and center it
04:04 Tom_itx use a 'last word' indicator for that
04:05 Tom_itx i've always said you can get closer with a 4 jaw anyway
04:06 rue_bed yes, but I expect the 3 to be closer than that
04:07 Tom_itx the 3 jaw may be off by different ammounts too, depending on how 'open' it is and how well they machined the spiral gears
04:07 rue_bed mmm
04:08 rue_bed 7 thou is a lot of lopsidednesss
04:08 Tom_itx it is
04:08 rue_bed the backplate is good to 2 thou
04:09 rue_bed the 7 thou comes in between that and the chuck body
04:09 Tom_itx you could also turn it on the backplate and reposition it to see if that helps
04:09 rue_bed and the backplate isn't fine finish, so most of that 2 is just noise
04:10 rue_bed I dont see why I couldn't make a small (3"x4" or so) mill
04:10 Tom_itx you can't do alot with 3 x 4"
04:11 rue_bed mmmm
04:12 rue_bed if its steel you can do...
04:13 rue_bed I keep having little cutout jobs I do by hand
04:13 Tom_itx how did you cut the flats on that air fitting?
04:13 rue_bed file
04:13 rue_bed :)
04:14 Tom_itx the holding fixture would take up most of your space
04:14 rue_bed nono, I meant usable workspace
04:14 Tom_itx i barely get by with 7 x 9
04:14 rue_bed it'd be bigger table than that with all the clampdown space
04:15 rue_bed I can do 11x5.5 in foam/wood
04:15 rue_bed or drilling
04:16 rue_bed the new cnc is supposed to be better but still not really rated for milling metal
04:17 Tom_itx it's hard to build a rigid home built machine
04:17 rue_bed what rpm ranges you make most use of?
04:17 rue_bed yea, I have some ideas
04:17 Tom_itx my spindle goes to 5k and i use the upper end of it mostly
04:17 Tom_itx between 2500 and up usually
04:17 rue_bed ok
04:18 Tom_itx but i got small bits
04:18 rue_bed do steel often?
04:18 Tom_itx smaller the bits the faster you need to spin em
04:18 Tom_itx not much
04:18 rue_bed hmm
04:20 Tom_itx i can get more done with alumnium
04:20 Tom_itx i generally am limited on project time
04:21 Tom_itx aluminum surplus is more readily available to me too
04:29 theBear anyone know how to say say $1 through $(number of cmdline options/spaced data) in a bash script, rather than just typing a bunch of $blah and hoping it doesn't go above that ?
04:30 theBear ie. for a wrapper that say, just adds one cmdline option to a command, so the number of cmdline options to the original cmd via the wrapper doesn't matter, they all get passed
04:32 Triffid_Hunter theBear: "$@"
04:32 Triffid_Hunter with the quotes, those are very important.. without the quotes, any escaping of spaces that user has done is undone
04:40 theBear ahh yes, not that i'm an expert now, but when i first messed with more than basic bash stuff i had quite some adventures getting used to quoting and layers of escaping/quoting etc etc
04:40 theBear and as usual, i forgot it this time round
04:40 theBear hard to learn new languages when you never get a chance to practice
04:42 Triffid_Hunter I got well acquainted with mirc script back in the day, bash was a very easy step from there
04:47 theBear thanks btw
04:47 theBear yeah, it's certainly not a tricky language, just that these days i might program a couple times a month, usually on some 'random' language i've got minimal experience with, usually out of desperation, the finer points blend together in my head
04:49 moriarty http://www.telegraph.co.uk/technology/microsoft/9739108/Microsoft-expands-Surface-into-third-party-stores-after-flagging-sales.html
04:49 moriarty <3
05:17 rue_house hahaha
05:17 rue_house how long before linux is running on them?
05:29 Triffid_Hunter rue_house: same amount of time until the sales pick up a bit
05:29 rue_house :)
05:30 rue_house I bet they can be rooted via a webpage with a custom font that contains a virus
05:30 Triffid_Hunter well sure, that's true of every microsoft product, just a matter of finding it
05:30 rue_house :)
05:31 rue_house WHY IS THE PERFERATION ALWAYS THE STRONGEST PART OF THE PAGE!!!!!
05:34 rue_house if I send a letter to the international space station, do you think they will get it?
05:35 rue_house whats to stop me?
05:36 rue_house what happens if I write "ok" in the box that says "do not use this area"
06:14 rue_house ok I found what I think is a valid enough address for the international space station, wrote them a letter
06:19 rue_house I can use the hall switch from a muffin fan to make a switch for turning the light on and off for the canopy of my truck
06:19 rue_house they are latching switches
06:19 rue_house I can put a magnet in a pipe
06:20 rue_house boost it with a fet
07:04 rue_house and thats how you take over the world
07:05 rue_house ok I have a few ideas for force sensors
08:06 rue_house hmm "colours.c" should be "console.c"
09:39 Nrk9t1x New Quadrocopter by Secom: http://x0z3n.livejournal.com/1084788.html ;)
11:16 ace4016 i may be the only one who thinks this, but quadcopters seem like one of the most impractical ideas for what they are intended for 90% of the time
11:37 rue_house I found how to recieve arrow keys on linux console apps, you have to set , or for that matter clear raw.c_lflag &= ~(ICANON | ECHO | ISIG | ECHOE); those attributes for stdio
11:37 rue_house doing so will cause you to lose ctrl-c etc codes for the console, so if your program crashes you hooched
11:37 rue_house tcgetattr(STDIN_FILENO,&raw);
11:37 rue_house raw.c_lflag &= ~(ICANON | ECHO | ISIG | ECHOE);
11:37 rue_house raw.c_cc[VMIN]=1;
11:37 rue_house raw.c_cc[VTIME]=0;
11:37 rue_house tcsetattr(STDIN_FILENO,TCSAFLUSH,&raw);
11:38 dunz0r rue_house: Sounds "hacky". There's probably a better way.
11:38 dunz0r Otherwise no console apps that uses arrow keys would accept C-c, and they do
11:39 rue_house the curses library, but it would be a LOT more lines of code, and when they change curses, your program wont work
11:39 rue_house the program recieves is directly, as 0x03
11:39 rue_house while (c != 3) {
11:39 rue_house c = getchar();
11:39 rue_house printf("recieved %c (%X)\n", c, c);
11:39 rue_house }
11:46 rue_house now I can write the libreadline replacement
14:41 rue_house dunz0r, but there are a lot of people who say it cant be done at all, so if you have some ideas then by all means do tell
20:20 barriers :3