#robotics Logs
Feb 14 2015
#robotics Calendar
00:23 rue_more movie?
00:24 tsmeow-afk nods sl
00:36 slidercrank British
00:36 slidercrank The film was released in the United Kingdom on 21 January 2015
00:36 katsmeow-afk it's way up on my wishlist anyhow
00:36 slidercrank it got a high rating
00:37 katsmeow-afk what is the movie called in UK ?
00:37 slidercrank http://en.wikipedia.org/wiki/Ex_Machina_(film)
00:38 katsmeow-afk yeas, what's it called in UK ?
00:38 slidercrank So it's called
00:39 slidercrank it was released under this name
00:40 tsmeow-afk s
00:40 slidercrank katsmeow-afk, what do you mean? I don't understand you
00:41 katsmeow-afk it's been released, but i see no flood of responce to it anywhere
00:42 katsmeow-afk i can see is : it's great, and there;s one cgi error in it
00:48 slidercrank katsmeow-afk, I'm still waiting for Interstellar to appear in a good quality
00:48 Loshki slidercrank: me too...
00:48 katsmeow-afk that's a wierd movie
00:51 katsmeow-afk how do you launch into space, get lost, and reappear 4 inches tall in a book shelf back on earth?
01:02 mrdata by becoming merch
01:11 rue_more sounds like an infinite improbability drive thats slightly out of phase alignment
01:13 katsmeow-afk https://diafygi.github.io/webrtc-ips/ <<== using chrome, even on a vpn, reveals your machine ip on your lan, your hub ip, your isp addy, and you vpn ip
01:14 rue_more I guess I have no stun servers
01:14 rue_more it comes up blank
01:14 katsmeow-afk k
01:15 rue_more oh chrome, I guess my browser is too old
01:15 Jak_o_Shadows I only have public IP and LAN Ip.
01:15 katsmeow-afk FF didn't reply with any ip
01:15 Jak_o_Shadows But that's the same in FF and Chrome
01:16 katsmeow-afk Chrome gave up every ip that could dentify me and the machine in use
01:16 Jak_o_Shadows and same with Opera
01:16 katsmeow-afk even thru the vpn
01:16 rue_more kat, your using windows
01:16 rue_more I'm using linux
01:16 katsmeow-afk Those warnings also say that the issue only appears to affect Windows users, but that's not necessarily the case—many comments (and our own testing) note that depending on your VPN and how it's configured, your IP address may be leaked even if you use a Mac or Linux system.
01:17 rue_more ideas on what I should have for supper?
01:18 katsmeow-afk bacon
01:18 rue_more I have one piece left and its about 4 weeks old
01:18 Jak_o_Shadows What's a Hub IP anyway
01:18 rue_more its a switch that repeats everything to every port
01:19 tsmeow-afk has telco - modem - hub - switch - pu
01:19 Jak_o_Shadows oh, righto. I don't have one. I have telco-modem-router-computer
01:19 rue_more fiber - modem - router - switch - switch - computer
01:19 katsmeow-afk the hub (or router) hands out ip, the switch doesn't, so ic an plug n anything to the hub, but havetomanually assign ip on the gigabit lan behind the switch
01:20 Jak_o_Shadows It didn't give the modem IP
01:20 rue_more I had nothing
01:20 rue_more iirc the local ip is a variable in the browser too
01:20 katsmeow-afk not evenbacon!
01:20 rue_more so that shouldn't even be a challange
01:20 rue_more icecream
01:21 katsmeow-afk Firefox and Chrome have implemented WebRTC that allow requests to STUN servers be made that will return the local and public IP addresses for the user. These request results are available to javascript, so you can now obtain a users local and public IP addresses in javascript.
01:21 rue_more can I have icecream for supper?
01:21 katsmeow-afk Additionally, these STUN requests are made outside of the normal XMLHttpRequest procedure, so they are not visible in the developer console or able to be blocked by plugins such as AdBlockPlus or Ghostery.
01:21 katsmeow-afk yeas
01:21 rue_more how much icecream do I need to consume to get my daily intake of stuff?
01:22 katsmeow-afk 1/2 cup
01:22 rue_more I have reason to belive I only have 20 years left to make myself mechanical
01:22 rue_more how do I map all the neurons of a brain?
01:22 katsmeow-afk that's because you are in Canadia
01:23 rue_more I thinkt he background noise is the biggest problem
01:24 rue_more with 4 probes at different locations, the 3d position of every impulse should be mappable
01:25 rue_more 3 would only do 1 plane
01:25 rue_more 4 billion neurons? or 40, I forgot
01:25 rue_more ironic, I think
01:26 rue_more sentience cant be hard, almost everyone does it
01:27 katsmeow-afk i don't agree
01:27 rue_more I said almost
01:27 katsmeow-afk i see humans all the time wheever i go out among them,and many are running around with no lights on inside
01:28 rue_more keep in mind, your also in a bad area
01:28 tsmeow-afk
01:28 rue_more I sure th heck dont have evergy to do anything, and making supper is on the todo list
01:29 rue_more I have 7 old computers from work, they might have goodies in them
01:29 rue_more need to strip them down
01:29 rue_more along with some of the 6-10 printers on the deck
01:29 rue_more not including the 8 impact printers I just got
01:29 rue_more .... oh dear
01:30 rue_more and I have to finish a wiring harness I started at work today
01:30 rue_more and finish a ... ar
01:30 rue_more g
01:32 rue_more I have to list cables on ebay
01:32 rue_more I dont want to cook supper, but more than that I dont want to eat
10:06 codepython777 has anyone ever lifted 400lbs using a motor here? I'm looking to build a height adjustable desk for work.
10:07 codepython777 any ideas what kind of linear actuator am i looking for?
10:08 codepython777 http://www.amazon.com/WINDYNATION-Actuator-Maximum-Mounting-Brackets/dp/B00P4UG4PG ?
10:14 Tom_itx use a tiny motor and leverage
10:25 ace4016 fast motor + lots of gears :P
10:26 ace4016 or a pulley system
10:57 codepython777 I was hoping someone had made something like that already. Can't find anything except commercial 2 legged solutions.
11:13 rue_more I have a bunch from hospital beds rated 400kg
11:13 rue_more hospital bed actuators
11:28 SquirrelCZECH hmm
11:29 uirrelCZECH wanted such desk too, but nah, price for electronic acutators seem
11:29 SquirrelCZECH rue_more: was it hard to get them?
11:32 rue_more no, the patience thought I was working there
11:32 rue_more jk
11:32 rue_more they got rid of a bunch of electric beds
11:33 codepython777 SquirrelCZECH: Seems like $70 can buy 225 lb actuators?
11:33 e_more sh
11:34 rue_more there is...
11:34 SquirrelCZECH I hoped to spent 150$ at most on his table
11:34 SquirrelCZECH better under 100
11:34 SquirrelCZECH :/
11:34 codepython777 rue_more: What is?
11:35 SquirrelCZECH I suppose I could be OK with 100lb actuators?
11:35 SquirrelCZECH two per table
11:35 rue_more http://ruemohr.org/~ircjunk/tutorials/mech/actuator/
11:35 rue_more there is that, but I didn't take an overall image
11:36 SquirrelCZECH yeah
11:36 uirrelCZECH is thinking about building proper sitting desk and proper extension for standing on top o
11:37 rue_more your gonna stand on your sitting desk?
11:38 codepython777 rue_more: I've a bunch of equipment to keep on them. So i need 400lb weight. - 100lb is for the wooden plank itself
11:40 rue_more did you look at the images?
11:40 rue_more can you udnerstand hwo it works?
11:40 rue_more shall I put a slideshow on that page?
11:44 SquirrelCZECH wat?
11:45 SquirrelCZECH rue_more: "proper extension, for standing, on top of it"
11:46 codepython777 we need 4 legs to go up and down and take equal weight :)
11:46 SquirrelCZECH yeah
11:46 SquirrelCZECH but I though that you can go with 2 acutators if it's strong enough for you
11:47 SquirrelCZECH :)
11:47 SquirrelCZECH and 4 legs
11:50 SquirrelCZECH codepython777: where did you find that actuator?
11:53 codepython777 amazon. http://www.amazon.com/WINDYNATION-Actuator-Maximum-Mounting-Brackets/dp/B00P4UG4PG
11:53 codepython777 SquirrelCZECH: You are right, 2 will do for my application + some simple mechanical stuff for stability.
11:57 SquirrelCZECH yeah
11:57 SquirrelCZECH nah
11:58 uirrelCZECH would go with 250lb for entire t
11:58 codepython777 k how do we design a stable table with that?
12:00 SquirrelCZECH four legs
12:00 SquirrelCZECH with rails
12:01 codepython777 show me a picture?
12:01 SquirrelCZECH acutator on both sides
12:01 SquirrelCZECH :)
12:01 SquirrelCZECH nah
12:01 uirrelCZECH will try to design somet
12:02 codepython777 I think i'd be more comfortable with 2 actuators. 4 would be awesome, but then if they are not in sync, the table slants.
12:03 SquirrelCZECH yeah
12:03 uirrelCZECH have to use 2
12:03 SquirrelCZECH 1 would be too much hassle
12:04 codepython777 SquirrelCZECH: one can do this - http://www.geekdesk.com/geekdesk-v3-frame-only
12:04 codepython777 but this is very very crappy - no stability whatsoever
12:04 SquirrelCZECH that price range...
12:05 SquirrelCZECH hmm
12:05 SquirrelCZECH I am thinking about U-shape
12:05 codepython777 I do plan to spend $500 on my build
12:05 SquirrelCZECH I mean, U-Shape from the front view
12:05 SquirrelCZECH and table moving inside the U-shape
12:05 SquirrelCZECH while the u-shape sides would be at height of the "stand desk"
12:11 codepython777 https://www.youtube.com/watch?v=IMeA9tJc2G4 - metal !
12:15 codepython777 SquirrelCZECH: Maybe it will be easier to buy a table, and just convert it to height adjustable. :)
12:15 SquirrelCZECH well
12:15 SquirrelCZECH I wanted to build table from the beginning :D
12:18 codepython777 then make it easy to build ;)
14:01 rue_shop3 Tom_itx, whats your new top speed on the shoreline?
15:15 Tom_itx ?
15:15 Tom_itx the axis or the spindle?
15:16 Tom_itx axis is ~80ipm rapid but i don't cut that fast
15:16 Tom_itx spindle is ~5krpm
15:39 e10byagrue Does anyone see a problem with powering a DC motor over USB? I have a USB Battery Pack, and was wondering if I could use it to power small 5v motors
15:39 Tom_itx < 400ma
15:39 Tom_itx i think it's a bad idea personally
15:40 e10byagrue I was wondering if it would drop the lifetime of my battery.
15:41 e10byagrue It seemed too good to be true for some reason. I will probably pick up some NiMH AA's to power them.
15:41 e10byagrue Unless that is also a bad idea.
15:41 Hyratel1 well what kind of draw do you expect from this?
15:41 SquirrelCZECH nah
15:41 SquirrelCZECH NAH
15:41 Hyratel1 what kind of runtime do you need out of the system
15:41 SquirrelCZECH NAH NAH
15:41 SquirrelCZECH I am twisted
15:41 SquirrelCZECH :)
15:42 Hyratel1 e10byagrue,
15:42 e10byagrue Let me check the motor spec real quick.
15:44 e10byagrue 4.7v 160mA
15:45 e10byagrue Would that run the risk of damaging the battery pack?
15:45 SquirrelCZECH so
15:46 e10byagrue I would be controlling it with a L293D with GPIO (5v) RPi for logic control
15:46 SquirrelCZECH can somebody give me a guess
15:46 SquirrelCZECH how much power can arduino nano consume
15:46 SquirrelCZECH ?
15:46 SquirrelCZECH :D
15:46 ace4016 it's in the datasheet of the AVR chip it uses
15:46 ace4016 actually, the regulator on the nano would more likely be its limits
15:47 uirrelCZECH needs to design battery for r
15:48 0byagrue is in the same b
15:48 ace4016 interesting; it doesn't state max power draw
15:48 SquirrelCZECH fuuu
15:48 SquirrelCZECH my WM wen crazy
15:49 e10byagrue according to http://arduino.stackexchange.com/questions/926/what-is-the-max-power-consumption-of-arduino-nano-3-0 around 2.4mA @ 5V
15:49 e10byagrue actualy 280 mA @ 5V
15:49 e10byagrue derp
15:50 ace4016 500mA is what the voltage regulator can supply
15:50 SquirrelCZECH ok
15:50 SquirrelCZECH and what I can calc for https://www.servocity.com/html/hsr-1425cr__continuous_rotatio.html#.VN--Nbv5JhE ?
15:50 SquirrelCZECH given that they will be at 5V
15:50 SquirrelCZECH two of them
15:52 ace4016 not enought info
15:55 SquirrelCZECH given that they will be running at full power for entire time
15:55 SquirrelCZECH :)
15:56 Hyratel1 e10byagrue, that's a weird spec for a mote
15:56 Hyratel1 motor
15:58 e10byagrue Hyratel1 it's a little guy. Has a small gearbox attached already. 40RPMs and high torque.
15:58 e10byagrue (relatively speaking)
15:59 Hyratel1 well 12v@30A is 1HP
15:59 Hyratel1 er
15:59 Hyratel1 @60A
16:00 e10byagrue Do you think it would be a bad idea to use the USB Battery I have? Outputs at 5v 2.1A
16:00 Hyratel1 that's not tuhe metric i need
16:00 Hyratel1 what kind of amperage will the motors pull
16:01 e10byagrue 160mA
16:01 Hyratel1 you're fine
16:01 Hyratel1 two motors, Left/Right for a skid steer?
16:01 e10byagrue Sweet. Should I throw anything else in to protect the battery?
16:02 Hyratel1 flyback diode on each motor driver
16:02 e10byagrue I was going to start with one motor for right now, maybe two later on unless that seems like a bad idea.
16:02 Hyratel1 you're using H-bridge drive, correct?
16:02 Hyratel1 robot or just a Widget
16:02 Hyratel1 ?
16:02 e10byagrue l293D
16:02 Hyratel1 not answering the question
16:02 e10byagrue Sorry. Complete newbie to the hardware side of things.
16:02 Hyratel1 robot or just a Widget?
16:03 e10byagrue Just a widget for right now, but it will probably be a robot later on.
16:04 Hyratel1 use a different chip
16:04 Hyratel1 that one has no Coast mode
16:04 Hyratel1 you need a coast mode if you want to do PWM drive
16:05 Hyratel1 otherwise you're uselessly burning power
16:05 e10byagrue Crud. I read last night that PWM with that chip was okay.
16:06 Hyratel1 it has "Run" "brake"
16:06 e10byagrue Back to researching. Any suggestions?
16:08 e10byagrue SN754410NE H Bridge IC?
16:09 e10byagrue There is even a Motor Controller Board Kit I can pick up.
16:10 Hyratel1 it does the same thing
16:11 e10byagrue No bueno. Thank you.
16:12 Hyratel1 how much manufacture can you do
16:13 e10byagrue Not sure I know what you mean?
16:14 Hyratel1 can you make your own circuitboard
16:15 e10byagrue I could pick up a PCB Etching kit, I suppose.
16:16 e10byagrue g2g. Thanks guys!
16:28 codepython777 SquirrelCZECH: Did you get your table design ready yet? :)
16:28 SquirrelCZECH nope
16:28 SquirrelCZECH working on my cad lib and creating dark magic
16:28 codepython777 CAD library? Which one?
16:29 SquirrelCZECH python -> openscad
16:29 SquirrelCZECH mine
16:29 SquirrelCZECH <3
16:29 codepython777 SquirrelCZECH: python -> blender or maya as well. Not sure about autocad
16:32 SquirrelCZECH maybe?
16:32 SquirrelCZECH I suppose blender got some "joystick" support ?
16:32 SquirrelCZECH possible
16:32 uirrelCZECH tried to make it non-scad depe
16:32 SquirrelCZECH but I found out that scad is great for calculations
16:32 SquirrelCZECH you render into stl and than do calc :)
16:32 SquirrelCZECH codepython777: I can detect volume/weight/mass center on anything
16:39 codepython777 SquirrelCZECH: can it do collision detection?
16:39 SquirrelCZECH yep
16:40 SquirrelCZECH but ehm
16:40 SquirrelCZECH in really I just get things you want to "collision detect" into intersection()
16:40 SquirrelCZECH and then render stl()
16:40 SquirrelCZECH if it's empty -> no collision :)
16:41 SquirrelCZECH codepython777: point: it can get heavy on calculations if you do it with complex things
16:41 codepython777 SquirrelCZECH: what engine does it use to do collision detection? center of gravity simulation etc?
16:42 SquirrelCZECH wat?
16:42 SquirrelCZECH like I said
16:42 SquirrelCZECH just scads intersection of things you want to collision detect
16:42 SquirrelCZECH yeah, it's static...
16:43 SquirrelCZECH btw: center of mass is simple algorithm ... yet again it needs the "stl" of that thing to work
16:47 codepython777 SquirrelCZECH: I was looking to move things around in simulation - remember - moving table :)
16:48 SquirrelCZECH codepython777: yeahh
16:48 SquirrelCZECH only thing that scad got is $T
16:48 SquirrelCZECH *$t
16:48 SquirrelCZECH and it's not easy to work with :D
17:12 SquirrelCZECH naaah nah nah
17:12 SquirrelCZECH dark magic finished
17:24 katsmeow-afk robot attacks human, eats her hair for lunch : http://www.cbsnews.com/news/south-korea-woman-hair-stuck-in-robotic-vacuum-cleaner/
17:24 SquirrelCZECH :D
18:09 rue_shop3 the revolt has begun
18:20 slidercrank katsmeow-afk, heh. I posted it a week ago with the comment: <slidercrank> A robot attacks a human! The war has started http://kotaku.com/robot-vacuum-attempts-to-chew-owners-head-off-1684171465 (you're gonna lose it, stupid humans)
19:05 codepython777 SquirrelCZECH: http://www.windynation.com/Linear-Actuators/Windy-Nation-Inc/Solar-Tracker-Linear-Actuator-HD-24-12V-1250-lbs/-/247?p=YzE9Mjg= - 1250lbs :)
19:05 SquirrelCZECH wow
19:05 SquirrelCZECH lib changes finally done!
19:05 SquirrelCZECH ouch
19:05 SquirrelCZECH codepython777: I need weaker than the ones before
19:06 SquirrelCZECH :D
19:06 uirrelCZECH should be ok with around 160lbs for the t
19:06 codepython777 putting 4? or 2?
19:06 SquirrelCZECH *150 together
19:06 SquirrelCZECH wait
19:07 SquirrelCZECH 100kgs
19:07 SquirrelCZECH sooooo 220 lbs, yeah
19:07 codepython777 SquirrelCZECH: 220lbs requirement = 300lbs spec ;)
19:08 SquirrelCZECH hmm
19:08 SquirrelCZECH btw: maybe buy one 225 and try some pulley magic? :)
19:09 codepython777 SquirrelCZECH: the main problem is balance and sturdiness. I think even using 2 makes the balance problematic
19:09 SquirrelCZECH well
19:09 SquirrelCZECH with proper tracks for the table, I don't think so
19:09 SquirrelCZECH :D
19:09 codepython777 SquirrelCZECH: show me a design :)
19:09 codepython777 The ones i've seen with 2 are lame
19:09 SquirrelCZECH nah
19:09 SquirrelCZECH give me some time :D
19:11 tsmeow-afk offers 1" steel cable from elevator (the elevator is now no longer in serv
19:12 SquirrelCZECH hmm
19:12 katsmeow-afk ok, the #60 roller chain?
19:12 SquirrelCZECH ?
19:13 katsmeow-afk [18:48] <SquirrelCZECH> btw: maybe buy one 225 and try some pulley magic? :)
19:13 SquirrelCZECH i don't know what #60 roller chain is
19:14 katsmeow-afk i sync'd my bridge crane with fixed roller chain on each long rail mounted on the building, and a shaft with matching sprockets on the bridge
19:14 katsmeow-afk it's really heavy chain, like bike chain, but much larger
19:15 katsmeow-afk said method of sync'ing the bridge would work to keep your table level as you elevated/lowered it
19:16 katsmeow-afk then sturdyness is a simple matter of tension
20:00 rue_shop3 I think I killed my oven
20:00 rue_shop3 at just 150c
20:03 rue_shop3 I got 8 peices of plastic flattened tho
20:04 uirrelCZECH killed his syncing t
20:04 SquirrelCZECH owncloud sux
20:04 SquirrelCZECH really
20:05 SquirrelCZECH nah
20:05 SquirrelCZECH got servo->wheel adapter
20:05 SquirrelCZECH aaand I would like the robot to be water resistant if possible
20:05 SquirrelCZECH so...
20:05 SquirrelCZECH how would you make "hole" for shaft that rotates ... so the hole whole thing is water-resistant?
20:06 SquirrelCZECH https://cloud.veverak.org/public.php?service=files&t=4913d61c926bfe4fd3782b5a949f66af
20:07 SquirrelCZECH I am thinking about making grooves around the adapter and adding some lubricant or something into that grooves
20:22 SquirrelCZECH watertight axe!
20:22 SquirrelCZECH *shaft
20:22 SquirrelCZECH that's what I am looking for
20:41 rue_more hmm
20:41 SquirrelCZECH nah, got some tips!
20:41 SquirrelCZECH :D
20:41 SquirrelCZECH labyrinth seal looks interesting
20:42 rue_more you gonna spend $5000 on your first robot?
20:42 SquirrelCZECH why?
20:43 rue_more because I want your $5000
20:43 rue_more it looks like you have the drives hooked directly off the servos
20:43 rue_more do you know how weak those servo shafts are for side load?
20:45 uirrelCZECH doesn't have $
20:46 SquirrelCZECH rue_more: hmm
20:49 uirrelCZECH will find proper bearing with sensible ... cover and will be h
20:53 rue_more are you putting wheels directly on servos and then putting a robot on it?
20:55 SquirrelCZECH this wheels should be in air and pulling the tracts
20:55 SquirrelCZECH buuuut, I will add bearing on the adapter anyway
22:23 codepython777 SquirrelCZECH: http://www.nextdesks.com/img/lifting-column.jpg - I think this is too complicated :)
22:24 codepython777 $600 for that leg :)
22:55 rue_shop2 how about I sell you a 400kg actuator for only $50+shiping
22:55 codepython777 rue_shop2: show me the part please :)
22:59 rue_shop2 ok, later
22:59 rue_shop2 kat, did I ever tell you about the truck that was powered by a barking dog?
23:00 rue_shop2 the dog would start barking and the truck would go
23:00 rue_shop2 I tripped the thermal fuse in the oven :/
23:02 rue_shop2 you could hear the truck comming from quite a ways
23:20 katsmeow-afk no
23:21 katsmeow-afk i pull actuators off scrapped hospital beds too, sometimes
23:21 katsmeow-afk they aren't very accurate
23:21 katsmeow-afk just about any motor-gearbox-chain drive is better
23:23 codepython777 katsmeow-afk: I was thinking of making myself a 4 legged table with actuators
23:23 katsmeow-afk ok
23:23 mrdata a walking table?
23:23 tsmeow-afk watches the table follow codepython777 around the
23:24 codepython777 just wanted the table to go up and down :)
23:24 codepython777 height adjustment
23:25 Jak_o_Shadows Do you really need 4 then?
23:25 katsmeow-afk no, just one
23:25 Jak_o_Shadows Unless you want to make it tilt as well, which could be cool.
23:26 codepython777 Jak_o_Shadows: All the designs I've seen with 2 are kind of flimsy- balance problems.
23:32 Loshki SquirrelCZECH: still there...
23:44 rue_shop3 reflow oven does a great job softnign plexiglass
23:44 Tom_itx but have you done any reflow with it yet?
23:44 Jak_o_Shadows I wish I had a good, cheap, easy source of plastic.
23:45 rue_shop3 no
23:45 rue_shop3 the thermal fuse went internally at 150c
23:45 rue_shop3 for now I'v bypassed it
23:45 rue_shop3 obviously it'll need cooling in the control part
23:47 rue_shop3 heh
23:47 rue_shop3 interesting point
23:48 rue_shop3 I just flattened about 1.5 kg of pipe
23:49 rue_shop3 thats more than 1 spool of rerap plastic
23:52 Jak_o_Shadows I wish I had a use for all my failed prints.