#robotics Logs

May 24 2014

01:24 bubble_beam rue_more, ahoi
01:33 rue_more hey
01:34 rue_more so, 5 usb to ttl serial converts always detect in the same order when the hub they are plugged into is powered up
01:34 rue_more das cool ya
01:43 bubble_beam rue_more, how is this one man ?
01:43 bubble_beam http://www.ebay.in/itm/High-Quality-2-Linked-Trackbelt-4-wheel-set-Make-your-own-Robotic-Vehicle-/271425835584?pt=LH_DefaultDomain_203&hash=item3f323d9240
01:44 rue_more its better than most
01:45 rue_more large wheels and short tracks tho
01:47 bubble_beam thnks
01:48 rue_more http://www.ebay.ca/itm/Lego-RUBBER-Treads-WHEELS-technic-mindstorms-tank-track-hub-loader-robot-/271501315406
01:48 rue_more hmm
01:48 rue_more real image might be ncie
01:49 bubble_beam rue_more, i was wondering about mattracks
01:49 bubble_beam but cant find any
01:49 rue_more there are lego tracks too
01:49 bubble_beam okay
01:50 rue_more http://www.ebay.ca/itm/100-Lego-Black-Tread-Tracks-Tank-Crane-Excavator-Tractor-Robot-Technics-4-gear-/351069320093
01:50 rue_more I dont know your robot size
01:51 bubble_beam rue_more, i have only started gathering parts
01:52 bubble_beam i dont even know , what motors should i get
01:52 rue_more haha you could use synchro belts I suppose!
01:53 rue_more http://www.ebay.ca/itm/10-NEW-IND-ROBOT-TRACK-TRACKS-CRAWLER-TANK-TREADS-TEK-ROLL-840XH-275-399-/151172587835
01:53 bubble_beam :P
01:53 bubble_beam rue_more, what robots do you make/?
01:53 rue_more how big a robot do you want to make, what parts do you ahve so far?
01:53 bubble_beam rue_more, all i have is a rpi
01:54 rue_more http://ruemohr.org/~ircjunk/robots/robot_family2.jpg
01:55 rue_more thre are more, its an old picture
01:55 bubble_beam looks like terminator movie ^^
01:55 bubble_beam too many of em
01:55 rue_more ~$20 CAD or less ea
01:56 bubble_beam i am going to make my first robot
01:56 rue_more find stuff, make things
01:56 rue_more the more you do, the more you learn
01:57 rue_more you can make tracks
01:57 rue_more http://ruemohr.org/~ircjunk/tutorials/mech/wheel/wheel.html
01:57 rue_more just use a long gasket with them and you have a track
01:58 rue_more you can even drill them to screw right onto a servo
01:58 bubble_beam okay
01:58 rue_more dont cut your fingers off
01:58 bubble_beam lol
01:58 rue_more oh, and dont hammer towards your crotch!
01:59 bubble_beam in between have used an RPI for robots?
01:59 rue_more not me
01:59 rue_more I would just use a micro atx computer
02:00 bubble_beam okay
02:01 RifRaf heh been trying to get some mini itx going all day
02:01 RifRaf need one to control lathe
02:03 rue_more making lots of something?
02:03 RifRaf nah just an unfinished project
02:05 rue_more darn, I cant stay awake
02:09 rue_bed bad news on the septic system, 1st choice location would need to be raised about 2m to put it in
02:09 rue_bed there might not be a way of doing it without having a huge mound in the yard
02:27 theBear you don't want a septic tank way up in the air... 2 meters down is better for them :)
02:38 bubble_beam rue_more, i have to step down 9.6 volt to 5v
02:38 bubble_beam what wil be the easiest way?
02:42 RifRaf lm7805
02:43 bubble_beam RifRaf, me?
02:44 RifRaf yep
02:44 bubble_beam RifRaf, thanks. lemme see
02:44 bubble_beam RifRaf, one more thing , i want to use the same battery to power rpi (5V) as well as motors
02:45 RifRaf motors will typically draw too much for a 7805, thats just for your electronics
02:45 bubble_beam okay.
02:46 bubble_beam http://www.ebay.in/itm/ENVIE-4pcs-RECHARGEABLE-AA-1000-mAh-Ni-CD-BATTERY-CELL-/271466052527?pt=IN_Camera_Camcorder_Accessories&hash=item3f34a33baf
02:46 bubble_beam will that cells be enough for powering a robot with rpi?
02:46 bubble_beam ^^
02:47 RifRaf yep
02:47 bubble_beam but 4 of em would only be 4.8 volt right?
02:47 RifRaf 5 or 6 would be better
02:48 bubble_beam are they each 1000mah?
02:49 RifRaf yep, why not use a single 7.2V pack?
02:53 bubble_beam lipo?
02:53 bubble_beam RifRaf, but they are costly right
02:55 bubble_beam RifRaf, what motors should i use?
02:55 RifRaf lipo is 7.4, rc car packs are typically cheap and 7.2
02:56 RifRaf and will run motors and electronics for a small robot
02:57 bubble_beam okay
04:31 SquirrelCZECH_ RifRaf: more or less :)
04:31 RifRaf SquirrelCZECH_, what you want is called bitmap tracing
04:31 SquirrelCZECH_ oh..
04:31 RifRaf i use corel and aspire to do it at work, but inkscape does a fine job as well and is free
04:32 uirrelCZECH_ put it on background in "qcad" (2D Cad) and created the
04:32 RifRaf convert a bitmap into vectors that can be exported as dxf
04:34 SquirrelCZECH_ well, that was exactly what I needed for the shape of the part
04:34 SquirrelCZECH_ but for holes in it... I am happy with what I've did :D
05:29 SquirrelCZECH_ ok folks
05:29 SquirrelCZECH_ have anybody of you tried to make tripod head?
05:37 RifRaf like for a camera?
05:38 RifRaf automated?
05:38 RifRaf have made a few pan/tilt camera heads
06:18 SquirrelCZECH_ RifRaf: for DSLT
06:18 SquirrelCZECH_ not-automatic :D
06:19 SquirrelCZECH_ *non
11:10 GuShH Tom_itx: do you have the machinery handbook? which edition?
11:10 GuShH there's a 1918 edition for sale... and the newer 13th and 19th
11:10 GuShH I'm tempted to get the oldest, but also the newest... sigh
11:16 GuShH oh crap there's also the radio amateur's handbook from 1948
11:16 ShH w
11:17 GuShH haha it says $2 on the front cover... it costs me 40 bucks used.
11:17 GuShH inflation much
11:17 GuShH bah it's not as useful as the machinery's
11:33 Tom_itx yes
11:33 Tom_itx i have the book
11:33 Tom_itx 25 or 26 iirc
11:34 Tom_itx as well as the machinist ready reference
16:55 GargantuaSauce https://www.youtube.com/watch?v=EYMPdibttK8 holy shit he got it working
16:59 Skwint that's quite impressive to be fair
17:00 GargantuaSauce ya
18:25 MrCurious wow
18:25 MrCurious i see a future for that bot fixing high tension lines
19:09 SquirrelCZECH_ GargantuaSauce: are you motherfucking kidding me?
19:09 GargantuaSauce i didnt think he was going to pull off the twist
19:10 SquirrelCZECH_ yeah
19:10 SquirrelCZECH_ that's actually awesome
21:48 home so
21:48 home where do I go
21:48 home to find a motor like this: http://www.grainger.com/product/DAYTON-Gearmotor-4Z537
21:48 home locaclly
22:10 GuShH home: go home?
22:10 GuShH you should mention where "locally" is
22:11 home GuShH: uhm
22:11 home GuShH: in my city :D
22:13 GuShH yeah well nobody knows where your city is
22:13 GuShH so there's no way to help you
23:19 rue_shop2 why do all the computers always break down at once?
23:20 Tom_itx murphy owned them
23:24 Tom_itx rue_more, you want any of these motors etc i have?
23:34 MrCurious the FAIL packet is often transmitted as a broadcast message
23:51 RifRaf just got Z axis working with stepper on lathe, now for X