#robotics Logs
Sep 10 2017
#robotics Calendar
01:22 AM exit70: hi, what are some robotics projects one could do at home. i know how to program and (almost) finished https://www.udacity.com/course/artificial-intelligence-for-robotics--cs373
01:29 AM mrdata: exit70, what part of robotics would you be interested to focus on?
01:29 AM mrdata: eg: locomotion, object recognition, manipulation?
01:30 AM mrdata: mapping?
01:31 AM mrdata: to name a few
01:32 AM exit70: haven't thought much about that. manipulation you mean something like a 3d printer or a robot that cuts a chicken into 9 pieces?
01:33 AM mrdata: manipulation entails picking up objects, usually; sometimes orienting them; sometimes joining parts maybe
01:34 AM mrdata: and objects may be relatively ideal or non-ideal
01:34 AM mrdata: such as a soccer ball, or a coffee cup
01:34 AM mrdata: or a plate of jello
01:34 AM mrdata: etc
01:34 AM exit70: that makes sense
01:35 AM mrdata: knife-wielding is kind of advanced
01:35 AM mrdata: i get scared when i see that on video
01:39 AM mrdata: https://www.youtube.com/watch?v=-jdAsT0ZB-M
01:43 AM Jak_o_Shadows: I should make one of those tentacle things
01:53 AM mrdata: lol
01:54 AM mrdata: it's so ridiculously dangerous
01:54 AM Jak_o_Shadows: not to put a knife on lol
01:54 AM mrdata: i hope you can figure out how to have it pick up the knife, chop a carrot, and put the knife down
01:55 AM mrdata: and not chop your finger
02:05 AM Jak_o_Shadows: It's sorta that it gives you enough motion to sorta pretend to have more DOF than you actually do
02:12 AM exit70: it continues to amaze me that many "low-skill" jobs are very hard for robots, e.g., packing grocery
02:25 AM synja: the cost of a machine is greater than a worker, for a long time; it's not a viable short-term switch
02:25 AM synja: are there ary robot grocery baggers?
02:26 AM synja: alic1a?
02:27 AM alic1a: synja: How can i help you?
02:30 AM Jak_o_Shadows: well, it took 3 goes, bt i'ts printing properly now
02:44 AM exit70: https://youtu.be/CqE89V29WjQ
02:44 AM exit70: (spoiler alert: it's "cheating")
02:46 AM exit70: https://venturebeat.com/2017/01/31/grocery-giant-demos-robotic-arm-that-can-pick-and-pack-delicate-items-such-as-fruit/ way clumsier than human
03:22 AM eruditass: the world is just so unstructured, and it's hard to get enough data / simulate enough of those situations accurately. the jobs / parts of jobs that can be well constrained / formulated are what are ripe for robotics, for now.
03:28 AM eruditass: that also means that many jobs would have partial automation, so either trying to break the process into separate human and robot areas, or "co-robots" where people work alongside robots. The latter can be expensive (e.g. locators on every person) or requires reliable safety perception, which is also hard
04:37 AM rue_bed: see its all about pneumatics
05:04 AM Jak_o_Shadows: ok. The slider bit is done.
05:04 AM Jak_o_Shadows: Now to see if it can stand on it's own legs
05:04 AM Jak_o_Shadows: and when I sy done, I mean half done
05:13 AM Jak_o_Shadows: Perhaps not
05:13 AM Jak_o_Shadows: Will have to look in more detail
05:25 AM Jak_o_Shadows: I was always somewaht concerned about this. I am using rather tiny servos
05:32 AM Jak_o_Shadows: It can stand mind.
05:33 AM Jak_o_Shadows: Just not lift itself
05:33 AM Jak_o_Shadows: which may be the feet slipping
11:40 AM rue_bed: ditto
11:40 AM rue_bed: so far
11:40 AM rue_bed: havnt' tried a unified stand movement
11:40 AM rue_bed: but my robot was absconded with for an art show
11:40 AM rue_bed: ...
11:41 AM rue_bed: my IR light controller works nice so far
11:41 AM rue_bed: need to finish the lights
11:41 AM rue_bed: but, distractions
01:03 PM rue_shop3: WTF
01:03 PM rue_shop3: + rotation in my 2d library is counterclockwise?
01:03 PM veverak: hmm
01:03 PM veverak: distance of point from line defined by two points
01:04 PM veverak: I should be able to get formula for that
01:04 PM rue_shop3: double dist2d(point2d_t *this, point2d_t *that) {
01:04 PM rue_shop3: return sqrt(SQR((this->x)-(that->x)) + SQR((this->y)-(that->y)) );
01:04 PM rue_shop3: }
01:04 PM rue_shop3: like that
01:12 PM veverak: "find all points that are 'n' distance from line segment going from 'A' to 'B'"
01:20 PM rue_shop3: ouch, simotanious equation
01:20 PM rue_shop3: its waaaaay too early in the morning for one of those
01:20 PM rue_shop3: want me to give you the subproblem?
01:21 PM rue_shop3: I'v done this problem like a million times and I cant remmeber how it goes
01:25 PM veverak: I am using dot product now
01:25 PM rue_shop3: does it work?
01:26 PM veverak: on paper it seems yes
01:26 PM rue_shop3: aha
01:26 PM rue_shop3: I think its easy
01:27 PM veverak: I define p = A + Bt
01:27 PM veverak: as the line defining the segment
01:27 PM rue_shop3: do you have a few solved example points?
01:27 PM veverak: where segment is any point on that line with 0 < t < 1
01:27 PM veverak: then I say, there exists D = A + Bk
01:28 PM veverak: where D is closest point to point 'C' that is not on the line
01:28 PM veverak: there should be exactly one solution to this
01:28 PM veverak: and, vector A->B should be perpendicular to vector D->C
01:28 PM veverak: meaning their dot product is '0'
01:28 PM rue_shop3: hah, I need the acute angle function I was trying to debug before you asked!
01:29 PM veverak: if put it together, I've got formula with known constants and one unknown: 'k'
01:29 PM veverak: I solve that, I am done
01:31 PM rue_shop3: "parallel line thru point" :)
01:31 PM rue_shop3: another method I'm ignoring
01:32 PM rue_shop3: I dont have general form 3d line fn's
01:33 PM rue_shop3: my 3d library sucks so far
01:37 PM rue_shop3: (x - x1)/a = (y - y1)/b = (z - z1)/c ?
01:38 PM rue_shop3: A*x + B*y = C
01:38 PM rue_shop3: so, should be A*x+B*y+C*z = D
01:40 PM rue_shop3: right, which is a plane
01:40 PM rue_shop3: you sound fine, I'm gonna concentrate on my other problem
01:41 PM rue_shop3: and why the hell is + rotation in my library counterclockwise?
01:49 PM rue_shop3: well I find that concerning, I wonder how many programs are tailored to a rotate that goes the wrong way
01:53 PM rue_shop3: oooh, yea, a little SDL shows that my function is on acid
02:04 PM rue_shop3: I think the rotation directions of my two functions conflict
02:07 PM rue_shop3: uuuuugh
02:19 PM rue_shop3: my Z rotationa and cartesian2polar fn's results dont match
03:01 PM rue_shop3: ok, now all thats dealt with
03:03 PM rue_shop3: :) the motor on the pipe bender still works
03:03 PM rue_shop3: getting closer...
03:04 PM polprog: pipe bender?
03:04 PM rue_shop3: part of making my 12' mecha
03:04 PM polprog: are you building Bender from Futurama?
03:04 PM rue_shop3: no
03:04 PM polprog: shame
03:04 PM rue_shop3: mine dosn't have a university degree in bending
03:04 PM rue_shop3: (even if only a 1 min upload)
03:06 PM SpeedEvil: rue_shop3: do you mean to manufacture, or as one axes
03:08 PM rue_shop3: so far my goal is to just make one
03:09 PM rue_shop3: arg, this acute() fn is being a pain in the ass
03:20 PM thepacket: alright
03:20 PM thepacket: how do i start?
03:20 PM thepacket: with robotics i mean
03:20 PM thepacket: any pointers?
03:20 PM rue_shop3: do you have $20 and an arduino?
03:20 PM ace4016: you buy some things and put them together
03:20 PM rue_shop3: and 3 years of patience
03:21 PM polprog: https://xkcd.com/138/
03:21 PM rue_shop3: thepacket, do you know any programming?
03:21 PM polprog: that's pointers
03:21 PM thepacket: i used to code x86 till pentium pro
03:21 PM rue_shop3: Secure Connection Failed
03:21 PM ace4016: thepacket, depends on how involved you want to get, but pick up some robot kits and have fun to start. I'm a weirdo and was opposed to buying kits and building everything from scratch
03:21 PM polprog: thepacket: asm or C?
03:21 PM rue_shop3: apparently I do not have sufficient securrity to view xkcd
03:21 PM thepacket: asm
03:22 PM polprog: that's a good start...
03:22 PM thepacket: ya i am no stranger to that stuff
03:22 PM thepacket: i have some background in electronics too
03:23 PM thepacket: built an amplifier, bassline, lab power supply, etc
03:23 PM thepacket: mechanics too
03:23 PM thepacket: but not without a manual :p
03:23 PM polprog: well, what do you wanna build?
03:23 PM ace4016: in that case, look up simple robotic ideas and try to make them. line followers are a common beginner robot and you only need a few things
03:23 PM thepacket: a dildo
03:24 PM thepacket: (lol)
03:24 PM ace4016: teledildonics?
03:24 PM thepacket: yea with built in sensors
03:24 PM ace4016: there's a market for that >_>
03:24 PM thepacket: and a camera
03:24 PM polprog: iirc there's an emacs script for dildo support
03:24 PM thepacket: so ppl can be their own discovery channel
03:24 PM rue_shop3: oh crap, I cant email till I get X going
03:25 PM polprog: rue_shop3: if you use webmail, try elinks
03:25 PM thepacket: something like a robotic arm
03:25 PM rue_shop3: I dont use webmail
03:25 PM rue_shop3: I use real pop mail
03:25 PM polprog: then you're screwed with mutt
03:25 PM rue_shop3: thepacket,
03:25 PM rue_shop3: do you have $20 and an arduino?
03:25 PM thepacket: arduino?
03:25 PM polprog: it's an AVR micro in a fancy board with a fancy HAL
03:25 PM thepacket: i thought arduino is not that tough
03:26 PM rue_shop3: yea, its an atmega328 on a carrier board with support circuitry for less than the controller chip itself costs
03:26 PM rue_shop3: ok, do you have $23 and patience?
03:26 PM rue_shop3: I hear a no
03:27 PM thepacket: i have 23$ and raging anger between long silences while making robotics :D
03:28 PM rue_shop3: ?
03:28 PM thepacket: bad joke
03:28 PM rue_shop3: ok, so, first, arduino ok?
03:28 PM thepacket: yeah those i have
03:28 PM rue_shop3: ...
03:28 PM rue_shop3: ok let me start again
03:28 PM rue_shop3: (I'm getting to old for this)
03:28 PM rue_shop3: do you have $20 and an arduino?
03:29 PM polprog: [loop detected]
03:29 PM thepacket: you think its a bot?
03:29 PM rue_shop3: I could be, it would be easier for me
03:29 PM rue_shop3: "what do you want for supper?" "I WANT TO BE A ROBOT"
03:29 PM thepacket: ofcourse ! ! ! ! #robotics is full of bots
03:29 PM thepacket: :p
03:30 PM rue_shop3: if there is nothing I hate more than cooking, its having to eat the food I cook
03:30 PM polprog: you seem to have pretty much the needed background in electronics... just get some mechanical kit and experiment.. as somebody said here a line follower if a good start anywa
03:30 PM polprog: y
03:30 PM rue_shop3: I might not be the only one, when I ask my fiends if they would like something to eat, they tend to do that "no, no, no, its ok, I'm fine"
03:31 PM rue_shop3: polprog, you can start from the top down or the bottom up
03:31 PM thepacket: and then they remember they left their oven on?
03:31 PM polprog: rue_shop3: what do you mean? s
03:31 PM thepacket: ok ok
03:31 PM Tom_itx: rue_shop3, cook better food
03:32 PM thepacket: i want to build a butter bot
03:32 PM thepacket: like the one in rick and morty
03:32 PM rue_shop3: thepacket, so you have an arduino?
03:32 PM rue_shop3: this is a test for a quick, straight forward answer
03:32 PM thepacket: and ask "what is my purpose"
03:32 PM thepacket: and i say "you pass butter"
03:32 PM rue_shop3: FAIL
03:32 PM Tom_itx: rue_shop3, got your PC back in order then ehh?
03:32 PM rue_shop3: no
03:33 PM thepacket: and then build a huge robotic arm
03:33 PM rue_shop3: no X yet, I recompiled the kernel so I have the source I need to make the video driver
03:33 PM thepacket: i am not talking about a wooden arm
03:33 PM thepacket: i talking about a huge gorilla arm
03:33 PM rue_shop3: Tom_itx, I'm putting thepacket at about... between 12 and 18
03:33 PM rue_shop3: you?
03:33 PM polprog: rue_shop3: are you setting up linux from the kernel up (i mean nt using a distro)
03:34 PM Tom_itx: that much?
03:34 PM thepacket: who won? :D
03:34 PM polprog: i say 12-16
03:34 PM rue_shop3: I dont think you can type that fast on a tablet
03:34 PM thepacket: lies
03:34 PM thepacket: i can
03:34 PM thepacket: aw wait
03:34 PM thepacket: the other thing
03:34 PM thepacket: no i cant
03:35 PM thepacket: ehm
03:35 PM thepacket: if i was old enough to write asm on pentium ->PRO<-
03:35 PM rue_shop3: I cant convict him for things I do....
03:35 PM thepacket: how old would that make me?
03:36 PM rue_shop3: thepacket, you will like links
03:36 PM thepacket: the text browser?
03:36 PM rue_shop3: http://ruemohr.org/
03:36 PM rue_shop3: http://ruemohr.org/~ircjunk/robots/
03:37 PM thepacket: "At the click of this link, you will be a hacker."
03:37 PM thepacket: oh boy
03:37 PM rue_shop3: I'm gonna guess he clicked the first one so quick that he disn't miss anything
03:37 PM thepacket: ima bout to click
03:37 PM thepacket: ima clickin
03:37 PM rue_shop3: Tom_itx, can an attention span be measured in nm?
03:37 PM thepacket: crap
03:37 PM thepacket: i clicked
03:37 PM thepacket: i was expecting the meatspin
03:37 PM thepacket: and all i got is a bunch of directories
03:37 PM Tom_itx: rue_shop3, is he giving you grief or bringing back memories of when you cared about noobs
03:38 PM polprog: well youre a hacker, sit down while the FBI is coming, make some tea for them
03:38 PM thepacket: i dont have a big pot
03:38 PM thepacket: haha i made my first hacker joke
03:38 PM thepacket: envy me!
03:38 PM rue_shop3: I dont mind eagerness, short posts are annoying, how often did I do that? 4 years? maybe I still am
03:38 PM thepacket: oh ffs
03:39 PM thepacket: come on
03:39 PM Tom_itx: depends if you're talking to yourself or not
03:39 PM rue_shop3: http://ruemohr.org/%7Eircjunk/robots/arm9/slide.htm
03:39 PM rue_shop3: http://ruemohr.org/%7Eircjunk/robots/arm9/slide.htm
03:39 PM thepacket: i am nuts not a noob
03:39 PM Tom_itx: they get pretty short then
03:39 PM * rue_shop3 looks at the floor and say "yea..."
03:39 PM Tom_itx: you are a noob to robotics or you wouldn't be asking anything
03:40 PM thepacket: ok that i am
03:40 PM Tom_itx: and i'm too old to be wiping snot and changing diapers anymore
03:40 PM thepacket: ok just how old are you?
03:41 PM rue_shop3: thepacket, did you get that last link?
03:41 PM thepacket: yap
03:41 PM thepacket: i am looking at the arm porn
03:41 PM rue_shop3: oh god, I lost count...
03:41 PM Tom_itx: http://tom-itx.no-ip.biz:81/~webpage/index.php
03:41 PM Tom_itx: i am better organized than rue though
03:41 PM rue_shop3: thepacket, as your a hacker now, you can edit the URL and look for other robots
03:41 PM thepacket: waaaaaaaait wait wait
03:41 PM rue_shop3: Tom_itx, too busy building robots to make fancy webpages
03:42 PM thepacket: rue
03:42 PM thepacket: ruemohr
03:42 PM thepacket: and
03:42 PM thepacket: rue_shop
03:42 PM rue_shop3: hahah
03:42 PM thepacket: OGM
03:42 PM thepacket: OMG!!!
03:42 PM thepacket: you got your name from someones site?
03:42 PM thepacket: lame
03:42 PM Tom_itx: rue_shop3, pre-teens
03:42 PM thepacket: haahaha
03:42 PM thepacket: ok ok
03:43 PM thepacket: i kid i kid
03:43 PM rue_shop3: rlly? no, they dont know how to spell that well anymore
03:43 PM thepacket: arm10
03:43 PM thepacket: interesting
03:43 PM thepacket: looks nice and strong
03:43 PM thepacket: but really
03:44 PM thepacket: are plastic sprockets up to the job?
03:44 PM thepacket: i thought something like huge actuators would do the trick
03:44 PM rue_shop3: some of those arms have over 30 hours on them
03:44 PM rue_shop3: some with no breakdowns at all
03:45 PM polprog: http://ruemohr.org/~ircjunk/robots/arm10/p1080873.jpg nice keyboard
03:45 PM rue_shop3: Tom_itx, I was impressed when I made that hour counter and ran it for 188 hours
03:45 PM thepacket: are the breakdowns result of bad material?
03:45 PM Tom_itx: accurate?
03:45 PM rue_shop3: thepacket, usually missing screws, designed it with them, should have put them in when I built it
03:45 PM veverak: nah
03:46 PM rue_shop3: Tom_itx, PC rtc
03:46 PM veverak: code block
03:46 PM veverak: can't focus
03:46 PM thepacket: happens all the time :p
03:46 PM veverak: maybe I should try to design paddle wheels for my paddle wheel boat
03:46 PM thepacket: arm10 looks sweet tho
03:46 PM Tom_itx: rue_shop3, at least it's not dead here
03:47 PM exit70: Rue what you doing with SDL?
03:47 PM rue_shop3: testing my blooming acute fn
03:47 PM rue_shop3: its giving me answers like -235*
03:47 PM rue_shop3: thats NOT the acute angle...
03:48 PM thepacket: hah
03:48 PM exit70: what is the definition of your FB
03:48 PM thepacket: arm6 : is that a bicycle sprocket?
03:48 PM exit70: fn
03:48 PM rue_shop3: exit70,
03:49 PM rue_shop3: https://paste.debian.net/985455/
03:49 PM Tom_itx: thepacket, what sort of bot do you wanna build?
03:50 PM rue_shop3: he threw 4 examples...
03:50 PM Tom_itx: i wasn't paying attention to him
03:50 PM rue_shop3: but coulnd't answer even 1 question I posted to him
03:50 PM thepacket: a huge arm with fingers and everything that can hold a dildo
03:50 PM Tom_itx: ahh so he's a troll
03:50 PM thepacket: aw come on
03:50 PM rue_shop3: dosn't he remind you of...
03:50 PM thepacket: that was the summary
03:50 PM rue_shop3: that guy with the server farm
03:50 PM rue_shop3: back in like 2004?
03:51 PM Tom_itx: don't remember him
03:51 PM rue_shop3: meh
03:51 PM thepacket: rue
03:51 PM thepacket: did you canibalize a voip phone?
03:51 PM rue_shop3: prolly
03:51 PM rue_shop3: prolyl a few
03:51 PM thepacket: did you want et to phone home or smth?
03:52 PM thepacket: how many of those have you made??
03:53 PM Tom_itx: what sort of psu did you build?
03:53 PM rue_shop3: me?
03:53 PM Tom_itx: no
03:53 PM thepacket: me?
03:53 PM thepacket: dc
03:53 PM thepacket: up to 30v 5a
03:53 PM Tom_itx: mine's 48v 18A so i win :)
03:54 PM thepacket: size doesnt count
03:54 PM thepacket: :p
03:54 PM thepacket: neither rms
03:54 PM Tom_itx: not what she said
03:54 PM thepacket: lol
03:55 PM thepacket: alright frankenhex is from that inet library
03:55 PM rue_shop3: no
03:56 PM Tom_itx: http://tom-itx.no-ip.biz:81/~webpage/cnc/psu/control8.jpg
03:56 PM rue_shop3: 1 leg is from thingiverse, had to design the rest myself
03:56 PM Tom_itx: it's changed since then
03:57 PM Tom_itx: oh i know.. i put them in rue's directory
03:57 PM Tom_itx: http://tom-itx.no-ip.biz:81/~webpage/rue/Control2.jpg
03:58 PM thepacket: well the thing is
03:58 PM Tom_itx: http://tom-itx.no-ip.biz:81/~webpage/rue/Control1.jpg
03:58 PM thepacket: i have a buttload of batteries
03:58 PM thepacket: from 2 year old ups
03:58 PM thepacket: and i was thinking to do anything
03:59 PM thepacket: obviously ups batteries cant fit in a dildo
03:59 PM veverak: hmm
03:59 PM thepacket: thats about over 500v od dc
03:59 PM veverak: I thought there should be design for differential drive with one motor and servo dividing the output
03:59 PM thepacket: *of
03:59 PM veverak: seems like ... no
04:00 PM thepacket: but arduino?
04:00 PM thepacket: really?
04:01 PM thepacket: i played around with raspberry for a bit and i was not impressed by gpio
04:01 PM thepacket: everytime i needed to run constant checks the cpu went 100%
04:02 PM polprog: that's how constant checks work lol
04:02 PM polprog: and yo're telling me you programmed pentiums, i dont think so
04:03 PM thepacket: you don't get 100% cpu by checking rs232 on x86
04:03 PM thepacket: why should that happen on gpio?
04:03 PM thepacket: and why should that be a cpu problem rather than a bus problem?
04:05 PM * thepacket throws ball at raspberry robot arm
04:05 PM thepacket: *balls hits arm*
04:05 PM thepacket: *arm tries to catch the ball after 2 secs"
04:06 PM polprog: goodnight guys, we're dealing with an idiot here
04:06 PM thepacket: haha nice one polprog
04:07 PM thepacket: i mean everyone here showed some nice stuff
04:07 PM thepacket: except you
04:07 PM thepacket: you were such a help
04:09 PM thepacket: when i build my robotic arm i know where i am handing over my robotic dildo
04:14 PM thepacket: quiet all the sudden
04:59 PM rue_shop3: my morals are to high to build and sell that stuff
05:30 PM rue_shop3: hmmm
05:31 PM rue_shop3: if I have 3 points, for a triangle
05:31 PM rue_shop3: and I want to know if they are in clockwise or counterclockwise order
05:31 PM rue_shop3: I only have to test the order of 2 of them?
05:34 PM Tom_itx is now known as Tom_L
05:38 PM rue_shop3: if you look at the order of the points of a triangle from the centroid and their clockwise, its not possable to look at any of the other points and get a different answer
05:38 PM rue_shop3: didn't think on that, but it makes sense now
05:38 PM rue_shop3: thats a 2/3 optimization
08:08 PM rue_shop3: well on my way
08:09 PM Tom_L: to where?
08:09 PM rue_shop3: matching triangles
08:09 PM Tom_L: should i prepare a cot?
08:09 PM rue_shop3: this is something I thought of a long time ago
08:10 PM rue_shop3: for drilling pcb's but will also have other uses
08:10 PM rue_shop3: you have a drill file with points in it
08:10 PM rue_shop3: you pick 3,
08:10 PM rue_shop3: you put your pcb down on the driller and tell it where the 3 points are
08:10 PM rue_shop3: it works out the offset, scale, and rotation
08:10 PM rue_shop3: and does all the corrections to drill all the holes
08:10 PM rue_shop3: :)
08:11 PM Tom_L: sorta like touchoff works on linuxcnc
08:11 PM rue_shop3: but with rotation and scale?
08:11 PM Tom_L: if it's not perfectly square to the table
08:11 PM rue_shop3: yea
08:11 PM rue_shop3: with mine, it can be not-even-close
08:11 PM Tom_L: heh
08:11 PM rue_shop3: just throw the board down and it works it all out
08:12 PM Tom_L: damn i wish all these old pc supplies had the right connectors on em
08:12 PM Tom_L: i'd fix up another box tonight
08:13 PM Tom_L: i think my pc166 is just about served it's life
08:13 PM rue_shop3: I have a bunch of pc's all over the place, I apparently value the hardware too much
08:13 PM Tom_L: p166
08:13 PM Tom_L: same here
08:13 PM rue_shop3: yea, I retired mine, tho, the P2 that replaced it has been less reliable
08:13 PM Tom_L: i have hardware i know good and wel i'll never use again
08:13 PM rue_shop3: ditto the P100 jukebox
08:13 PM Tom_L: just can't seem to part with it
08:13 PM rue_shop3: the micro-itx machine repalced it has locked a few times now
08:14 PM rue_shop3: the p100 never ever locked up
08:14 PM rue_shop3: or crashed
08:14 PM rue_shop3: I think once it ran for 3 years straight
08:14 PM Tom_L: i've got an asrock board up and running to replace it, dual boot dos 6.22 & win7
08:14 PM rue_shop3: but it did stutter if you uploaded a long while it was playing
08:15 PM Tom_L: just can't quite put myself up to do it
08:15 PM rue_shop3: or if you clicked the volume adjust too fast
09:34 PM rue_shop3: :( I'm insane, the whole day I'v been hearing music almost unpercievably playing in the background of the shop, I just wrote it off as the jukebox, with the volume dialed all the way down, ... but the jukebox wasn't playing anything....
09:35 PM rue_shop3: didn't like the nonexistant music much anyhow,
09:35 PM rue_shop3: :-S
09:36 PM rue_shop3: nobody here dude
09:36 PM rue_shop3: but...
09:36 PM rue_shop3: nobody here...
09:36 PM rue_shop3: :( am I the only one who exists
09:37 PM rue_shop3: if so, your insanity is MUCH worse than your worrying about
09:37 PM rue_shop3: bugger
09:38 PM rue_shop3: I need an fn that gives me the angle of a line between two points
09:38 PM rue_shop3: you already did that
10:57 PM Tom_L: rue_shop3, the angle of a line between 2 points would be 180 deg
10:57 PM Tom_L: period.
10:57 PM Tom_L: now if you add a 3rd point that sheds a whole new light on it
10:57 PM rue_shop3: what if its drawn on the surface of a 3d obect?
10:57 PM Tom_L: it's not a line then
10:57 PM Tom_L: it's an arc or such
10:58 PM rue_shop3: it things it is
10:58 PM Tom_L: or line projection
10:58 PM johnflux: http://i.imgur.com/JGbsAAV.jpg
10:59 PM Tom_L: it could be wrapped or projected and the distance between the endpoints of those wouldn't be the same
10:59 PM johnflux: This is my robot
10:59 PM Tom_L: cool
10:59 PM johnflux: I want to make a nice body for it though, out of aluminium or stainless steel
10:59 PM johnflux: any suggestions on how I could do this though?
11:00 PM johnflux: I want the body to look like: https://mars.nasa.gov/msl/images/learnaboutme_homepage-hpfeat.jpg
11:00 PM Tom_L: rue_shop3, that looks like your cut n nut stuff
11:00 PM johnflux: I was thinking of making a prototype body out of paper, then get the body laser cut or something
11:01 PM Tom_L: i think their 'body' is pure function
11:01 PM rue_shop3: yea, it was a good idea
11:01 PM rue_shop3: nobody else thought so
11:02 PM Tom_L: johnflux that would add alot of unnecessary weight to it
11:03 PM johnflux: Tom_L: Well it's a rover - it only needs to crawl along slowly :-)
11:03 PM Tom_L: mock up a fiberglass mold or vacuum form something
11:04 PM johnflux: I don't have any machine to do that
11:04 PM Tom_L: make one
11:04 PM Tom_L: that's the type of stuff we do around here :)
11:05 PM Tom_L: or 3d print one, although i doubt you'd find a printer big enough within a hobbyists budget
11:05 PM johnflux: I thought about 3D printing it.. but the material cost would add up quite quickly
11:06 PM Tom_L: so would laser / waterjet cutting one
11:06 PM johnflux: I'm thinking of using like 0.8mm aluminium sheets
11:06 PM johnflux: and laser cutting that
11:06 PM johnflux: I could maybe cut with tin snips for a prototype first
11:06 PM johnflux: I'm just worried that it would look shite :-D
11:08 PM Tom_L: http://www.buildlog.net/blog/wp-content/uploads/2010/07/soj_deff_0062.jpg
11:09 PM johnflux: Tom_L: oh god that is so sexy
11:09 PM johnflux: all CNC'd, right?
11:09 PM Tom_L: it's a shame his page has been down a while
11:09 PM Tom_L: yes
11:09 PM Tom_L: http://robots.net/robomenu/1005675984.html
11:09 PM johnflux: Tom_L: that must cost a fortune, no>
11:10 PM Tom_L: you should see his shop
11:10 PM johnflux: " Currently I'd guess it's <6K "
11:16 PM Tom_L: http://www.seattlerobotics.org/encoder/200610/Article1/
11:16 PM Tom_L: that's about the best i can do for finding his work