#robotics | Logs for 2016-01-02

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[00:21:37] <anonnumberanon> what size gears do you have?
[00:21:40] <anonnumberanon> brb ramen
[00:38:05] <rue_shop3> I think I did a library of everything from 5 to 35 teeth
[00:51:46] <rue_shop3> ok, the board electrically checks out
[00:52:52] <rue_shop3> now I just have to flash it with the firmware
[00:52:59] <rue_shop3> that I havn't written yet
[01:23:03] <rue_shop3> ok, that took too long
[01:23:10] <rue_shop3> now to test
[01:53:18] <rue_shop3> ok the baord is programmed
[01:53:24] <rue_shop3> hmm, how to test...
[01:54:31] <Jak_o_Shadows> I wish we had harbor freight in australia
[01:54:54] <rue_shop3> you moved from new york to australia!?
[01:55:20] <Jak_o_Shadows> ?
[01:55:26] <Jak_o_Shadows> New York?
[01:55:32] <RyanS> Jak_o_Shadows or cheaper prices ....
[01:55:39] <zhanx> Jak_o_Shadows I was there today
[01:55:52] <Jak_o_Shadows> Yeah RyanS, either
[01:55:59] <rue_shop3> if (((position / 8) % 2) == 0) {
[01:56:08] <rue_shop3> that should come on for a while
[01:56:25] <RyanS> we'll have To satisfy ourselves with Bunnings or Masters
[01:56:43] <Jak_o_Shadows> I often say that bunnings is useless.
[01:57:11] <RyanS> i hate supercheap auto, I feel like a bogan going there
[01:57:50] <Jak_o_Shadows> I got a 108 piece toolkit from supercheap, so they're pretty useless to me now.
[01:57:59] <Jak_o_Shadows> I have all the power tools I can afford
[01:58:18] <rue_shop3> but, unlike canada, you can go to the corner store and buy metric drill bits
[01:58:39] <rue_shop3> one of my buddies went to FRANCE to get me a metric drill bit kit
[01:58:40] <RyanS> screw and bolt shopping is a painful experience at masters
[01:59:20] <Jak_o_Shadows> haha, that is true rue.
[01:59:33] <Jak_o_Shadows> RyanS, I just order a whole bunch from the local bolt-shop
[01:59:42] <RyanS> hey, we use metric in australia! we're not american
[01:59:55] <Jak_o_Shadows> $8 postage, or I can drive there and get it
[02:00:00] <Jak_o_Shadows> Much much cheaper and pleasant
[02:00:27] <RyanS> imperial should be outlawed
[02:00:29] <rue_shop3> hahah I forgot to enable interrupts
[02:00:43] <rue_shop3> hahah, I forgot what the function is called
[02:00:52] <rue_shop3> sei();?
[02:01:45] <RyanS> This would make a nice robot drive motor :P https://www.motiondynamics.com.au/brushless-gear-motor-60v-2000w-600-700-rpm-85nm-controller-accessories.html
[02:03:49] <Jak_o_Shadows> Ha. This is practically my vice: http://www.ebay.com.au/itm/Vintage-Dawn-Vice-Jaw-10-cm-/121852302868?hash=item1c5ef69614:g:W~MAAOSwCQNWg73C
[02:04:40] <RyanS> we have one of them
[02:04:54] <Jak_o_Shadows> Mine is about that vintage
[02:05:13] <RyanS> Although I would hardly consider it 'vintage'
[02:05:38] <Jak_o_Shadows> Probably 60 years old
[02:06:26] <rue_shop3> IT WORKS!
[02:06:30] <rue_shop3> with one glitch
[02:06:34] <anonnumberanon> cbi(); sei(); turn off turn on
[02:06:59] <anonnumberanon> or was it cli();?
[02:07:03] <rue_shop3> not having tested the circuit before assembling it, I didn't notice that the IR led that transmitts the serial data is normally on
[02:07:17] <rue_shop3> sei() enables the interrupts
[02:07:31] <rue_shop3> so its only sorta a glitch
[02:07:50] <Jak_o_Shadows> Why "sei" ?
[02:07:51] <rue_shop3> not sure if I shoudl change it or not
[02:07:55] <Jak_o_Shadows> Set enable interupts?
[02:07:59] <rue_shop3> set enable interrupts
[02:25:31] <rue_shop3> <rue_shop3> a) source a DIP 74LS04
[02:25:31] <rue_shop3> <rue_shop3> b) cut off pins 2, 8, 9, 10, 11, 12, 13
[02:25:31] <rue_shop3> <rue_shop3> c) fold back pin 14 over the bottom of the chip
[02:25:31] <rue_shop3> <rue_shop3> d) straighten pins 1, 3, 4, 5, 6, 7
[02:25:31] <rue_shop3> <rue_shop3> e) solder a wire strap from pin 14 to pin 1
[02:25:32] <rue_shop3> <rue_shop3> -- TADA a SIP 74LS2G04 --
[02:25:34] <rue_shop3> :)
[02:31:15] <rue_shop3> its funny tho, the 7404 is larger than the mega328
[02:31:28] <rue_shop3> correction worked
[02:31:32] <rue_shop3> led is normally off
[02:35:01] <Jak_o_Shadows> fiiine, I probably don't need a woodworking vice & bench dogs
[02:35:23] <rue_shop3> !?
[02:35:28] <rue_shop3> hows that help build robots?
[02:35:36] <RyanS> woof
[02:35:47] <Jak_o_Shadows> Well, I just like clamping things
[02:36:11] <Jak_o_Shadows> I mean, you're right, it's overkill
[02:36:45] <rue_shop3> vise
[02:36:53] <rue_shop3> with the anvil on the back
[02:36:55] <RyanS> i need more welding clamps, and a table with slots
[02:37:03] <RyanS> *vice
[02:38:11] <Jak_o_Shadows> I didn't even known avil vice's existed, but that seems like it would be handy
[02:41:07] <RyanS> you can get anvillos too! http://www.blacksmithsdepot.com/vise-anvil-combo.html
[02:41:49] <Jak_o_Shadows> Yeah. Handy. I probably do too much hammering on my vice
[02:42:08] <Jak_o_Shadows> I need to secure it better, it currently wobbles
[02:42:38] <rue_shop3> oops its tommorow
[02:56:15] <rue_house> well feel sgood to get that encoder finished
[02:56:29] <rue_house> now I'll need to work out the direction encoder system for it
[02:57:06] <Jak_o_Shadows> What are you making?
[02:57:06] <rue_house> and find my math do to poision tracking of a robot using the rotation and heading information from its caster
[02:57:13] <rue_house> lawm mowing robot
[02:57:21] <rue_house> (a bigger, badder one)
[02:58:01] <Jak_o_Shadows> oh, cool.
[02:59:08] <Jak_o_Shadows> I'm considering building dust/fume collection into the workbench
[02:59:28] <Jak_o_Shadows> I mean, I have a 3d printer, so I can do valves/grates/etc
[02:59:59] <rue_house> oo downdraft soldering table
[03:00:00] <rue_house> hmmmm
[03:00:04] * rue_house thinks about that
[03:00:30] <rue_house> have to be fine enough that I wouldn't lose 0203 resistors
[03:01:58] <Jak_o_Shadows> I was thinking box along the back of the workbench, with grates for general collection, as well as valves (to close grates) and ports (to connect accessories)
[03:11:41] <Jak_o_Shadows> rue_ for downdraft table, what about just something with a wire mesh over it
[03:39:24] <rue_bed> needs to be a stable surface tho
[03:40:01] <rue_bed> the fan I have shows that the intake needs to be between 2 to 6 inches from where your soldering
[04:02:01] <Jak_o_Shadows> I was thinking something like a vacuum former table with mesh over it
[04:07:12] <Jak_o_Shadows> Also, I am now thinking to have screwdriver/other tool holders at the back
[04:07:19] <Jak_o_Shadows> of the thingy bench
[04:07:32] <Jak_o_Shadows> vacuum tube*
[04:10:28] <Jak_o_Shadows> (mocking it up now)
[04:39:14] <Jak_o_Shadows> Sorta like http://www.pasteall.org/pic/show.php?id=97175, but also with attachment points for hoses
[04:40:05] <rue_bed> I suppose tight stainless mesh would work
[04:42:42] <Jak_o_Shadows> Just trying to decide what a good size would be
[04:43:05] <rue_bed> about 2"x20" would prolly work
[04:45:00] <Jak_o_Shadows> I was thinking moving up to a 80x80 with a bit of a shelf on top. Higher so you can do the tool storage (screwdrivers mostly) along the back, and wider to store things on top in boxes.
[04:48:28] <rue_bed> aha!
[04:48:31] <rue_bed> aha aha ha
[04:48:33] <rue_bed> aha!
[04:48:36] <rue_bed> ok ok ok o
[04:48:37] <rue_bed> ok
[04:48:44] <rue_bed> how to make spools with a 3d printer
[04:48:56] <rue_bed> make spool ends that fit onto plastic pipe
[04:49:23] <rue_bed> print two ends and push/glue them onto a short section of pipe
[04:51:20] <rue_bed> if only I could make hole saws on the lathe
[04:51:41] <rue_bed> maybe if I made a tooth cutting jig
[05:03:18] <Jak_o_Shadows> Hmm. What's a good size for the vacuum attachment ports. These are the ones for spot vacuuming and for attaching to tools
[05:03:36] <Jak_o_Shadows> 'spose I could just 3D print an attachment to the tools
[05:08:40] <Jak_o_Shadows> Damn I wish I had a table saw sometimes
[05:39:24] <psYbR> good use for a robot: https://onedrive.live.com/redir?resid=DB52FFED3913D2A4!27428&authkey=!AIBuiKNHt5q4uNA&ithint=video%2cmp4
[08:06:49] <veverak> any tips for good thermal isolation?
[08:06:52] <veverak> 120C +-
[08:07:10] * veverak was thinking about cork
[08:09:01] <deshipu> vacuum
[08:41:37] <veverak> a bit unpractical :/
[08:57:08] <robopal> silicon?
[08:59:06] <SpeedEvil> veverak: well - you say that - maybe not
[08:59:34] <SpeedEvil> veverak: http://www.ebay.co.uk/itm/5L-LITRE-AIRPOT-PUMP-ACTION-STAINLESS-STEEL-HOT-COLD-TEA-COFFEE-JUG-VACUUM-FLASK-/221945283297?hash=item33acf842e1:g:4eMAAOSw7NNUBu4j - for example provides 4W heat-leak at 80C delta for 5l
[09:02:18] <SpeedEvil> veverak: where are you? and what's it for?
[09:02:36] <SpeedEvil> common insulation is readily available that does .02W/m/K
[09:02:41] <SpeedEvil> common insulation is readily available that does .02W/m^2/K
[09:02:42] <deshipu> you just need to use high-pressure compressed vacuum
[09:03:26] <SpeedEvil> expanded polystyrene up to .04 (which is twice as bad)
[09:03:35] <veverak> under heated bed for reprap
[09:03:38] <veverak> :)
[09:03:56] <SpeedEvil> fibreglass/mineral wool is probably best
[09:03:58] <SpeedEvil> Or
[09:05:34] <SpeedEvil> http://www.ebay.co.uk/itm/Fire-Brick-Heat-Protection-Board-Narrowboat-Home-Stove-/272077938858?hash=item3f591be0aa:g:Sb4AAMXQwwlSC3-W
[09:05:58] <SpeedEvil> http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR3.TRC1.A0.H0.Xfirebrick.TRS0&_nkw=firebrick&_sacat=0
[09:06:11] <SpeedEvil> There are all sorts of useful blocks up to quite large for this
[11:17:55] <rue_bed> aerogel
[11:41:49] <rue_house> see nobody can come up with anything bad about earogel
[11:42:47] <ace4016> ?
[11:43:16] <rue_house> maybe if you turned off the join/parts you would know! :/
[11:43:26] <rue_house> zlog
[11:43:58] <rue_house> oh spools, cool
[11:44:41] <rue_house> suppose I could make a setup for a router table to cut the outter ring of disks for spools
[11:44:53] <rue_house> hmm, use a dremel and a bench clamp
[15:37:29] <rue_shop3> this same formula keep comming up
[15:39:11] <rue_shop3> for tractor mixing
[15:39:18] <rue_shop3> and for 3 to 4 pint conversion
[15:39:41] <rue_shop3> and for balancing the tension versus position of two counteracting actuators
[16:25:47] <rue_shop3> is that rumble the end of the world?
[16:26:00] <rue_shop3> where is the eject workpeice button on my lathe?
[16:54:34] <rue_shop3> ok I finished the motor for the electric 'upgrade' of the power wheelbarrow
[16:54:46] <rue_shop3> gonna need to find a speed controller for it
[16:56:32] <robotustra_> https://www.youtube.com/watch?v=A3iP0NGDDao
[17:02:26] <robotustra_> listen to the sounds https://www.youtube.com/watch?v=wpQyvufTswQ
[17:22:34] <SpeedEvil> rue_shop3: you mean a stock powered barrow, swapping out IC?
[19:21:22] <rue_shop3> no I made the power wheel barrow
[19:21:26] <rue_shop3> dont be silly
[19:26:37] <rue_shop3> swapping out the motor for the one I made
[19:32:26] <SpeedEvil> Well, I'm powering my unpowered barrow (or intend to)
[19:32:32] <SpeedEvil> so the question is reelvant
[19:35:06] <Jak_o_Shadows> I ruin wheelbarrows too quickly to worry about making them fancy
[19:41:53] <rue_shop3> this is not a standard wheelbarrow
[19:42:12] <rue_shop3> its a old garden tractor thats been converted
[19:43:31] <Jak_o_Shadows> rue, you ust have a much bigger backyard than I do
[19:43:34] <SpeedEvil> ah
[19:43:38] <rue_shop3> 1/2 acre
[19:43:47] <Jak_o_Shadows> ah. Yes, much bigger
[19:44:01] <rue_shop3> http://ruemohr.org/~ircjunk/images/dscn9671_tractor.jpg
[19:44:09] <rue_shop3> http://ruemohr.org/~ircjunk/images/dscn9672_tractor.jpg
[19:44:16] <rue_shop3> mid 1960's from what I could tell
[19:44:20] <SpeedEvil> I've only got a quarter of that
[19:44:32] <SpeedEvil> ^half
[19:44:32] <rue_shop3> its got a bucket with tipper on it now
[19:44:37] <rue_shop3> and front wheels
[19:45:20] <rue_shop3> http://ruemohr.org/~ircjunk/images/dscn0826_handtractor.jpg
[19:45:22] <rue_shop3> thats getting there
[19:45:34] <rue_shop3> that just about what it looks like today
[19:46:07] <rue_shop3> http://ruemohr.org/~ircjunk/images/dscn0875_handtractor.jpg
[19:46:08] <rue_shop3> it dumps
[19:46:58] <rue_shop3> the 3/4hp motor on it now can spin the tires
[19:57:53] <veverak> :)
[21:32:03] <rue_house> yay, all my ebay items have arrived, now I can never buy anything from ebay again
[21:33:03] <Jak_o_Shadows> What'd you get?
[21:33:19] <rue_house> almost shafted by their BROKEN system
[21:33:40] <rue_house> EVERY time their site screws up is a hastle to get sorted out
[21:34:02] <rue_house> its not sellers, its every time they screw up their database
[21:35:17] <rue_house> you cannot report a problem with ebay
[21:35:27] <rue_house> you can report a seller or a buyer
[21:35:31] <rue_house> not their system
[21:43:02] <rue_house> ok, hmm what to work on next
[21:43:08] <rue_house> feeling sleepy
[22:00:55] <Hyratel> rue_house, oh neat refit witht he motor
[22:03:36] <rue_shop3> thanks
[22:04:17] <rue_shop3> it has literally carried tonnes of bricks up the hill in my yard
[22:04:28] <rue_shop3> about 3 tones I'd guess
[22:05:01] <rue_shop3> and lots of dirt, its good for pulling out roots and sticks
[22:05:13] <rue_shop3> or just dragging things around
[22:05:22] <rue_shop3> it'll carry about 300lbs at a time
[22:05:38] <rue_shop3> but I'd never had anything heavy enough to fill it up with to try more
[22:05:47] <Hyratel> nice
[22:06:06] <Hyratel> how much reduction from the v belt to the wheels
[22:06:13] <Hyratel> and do you have speed control
[22:06:14] <rue_shop3> its crazy
[22:06:43] <rue_shop3> the origional had a high and low off the engine, there is a 3 speed transmission with a reverse, and another high and low on the wheels
[22:06:59] <rue_shop3> so, origionally the blooming thing was a 12 speed
[22:07:34] <rue_shop3> that motor is backwards, so I almost always use reverse
[22:08:23] <Hyratel> how much do you think it'd cost to homebrew a handtractro like that?
[22:08:53] <rue_shop3> its locked axle, so that makes it easier
[22:09:03] <rue_shop3> dont know how you would do the gearing
[22:09:51] <rue_shop3> Im gonna guess $500 in misc from a good auto wrecker
[22:10:03] <Hyratel> WAIT A MINUTE
[22:10:15] <Hyratel> I could make one with the rear end of a lawn tractro
[22:10:27] <rue_shop3> prolly
[22:10:34] <rue_shop3> oh sorry, minute wasn't up yet
[22:10:44] <Hyratel> hurr
[22:10:58] <Hyratel> five speed lawn trac
[22:11:14] <rue_shop3> yup
[22:11:28] <Hyratel> are you familiar with the concept of an E-clutch?
[22:11:31] <Hyratel> er
[22:11:39] <Hyratel> electrological clutch
[22:11:49] <Hyratel> put the motor in a coast state
[22:11:58] <rue_shop3> why
[22:12:01] <rue_shop3> electric motor
[22:12:02] <Hyratel> to avoid the need for a mechanical clutch
[22:12:10] <rue_shop3> quiet, easy to start
[22:12:24] <rue_shop3> screw clutch
[22:12:33] <rue_shop3> direct drive
[22:12:38] <Hyratel> the only problem is the yard I want to use it in is 100 yards, 30% slope
[22:12:50] <Hyratel> so power cord would be a PITA
[22:12:56] <rue_shop3> sounds like mine
[22:13:02] <rue_shop3> I have a good long cord
[22:13:45] <Tom_itx> rue did you see this? https://www.youtube.com/watch?v=JIlZsuRc9jQ
[22:14:09] <rue_shop3> cant here, disabled the stupid video stuffs
[22:14:12] <rue_shop3> whats it?
[22:14:30] <Tom_itx> metal pouring
[22:14:44] <Tom_itx> DIY carbon arc furnace
[22:14:57] <Tom_itx> pretty cool idea really
[22:15:03] <Tom_itx> shitty molds though
[22:15:05] <rue_shop3> :)
[22:15:32] <Hyratel> rue, what kind of wire do you use? just several extension cords chained up?
[22:15:48] <Tom_itx> you should watch it if you get a chance
[22:17:11] <Hyratel> http://www.homedepot.com/p/Husky-100-ft-12-3-SJTW-Extension-Cord-with-Standard-Plug-747-123100H31/205377755
[22:31:24] <Hyratel> rue_shop3, I'm not sure AC electric would be suitable for the yard I have in mind
[22:31:50] <Hyratel> the driveway zigzags across the yard it has like 4 terraced levels
[22:33:00] <Hyratel> so it'd need at least 400 feet of extension cord
[22:33:36] <robotustra_> Hyratel: use Tesla coil
[22:33:42] <Hyratel> robotustra, haha no
[22:41:00] <robotustra_> why?
[22:41:16] <robotustra_> what power do you need to transfer?
[22:41:59] <Hyratel> 3/4HP AC motor, negotiating about 450 feet of unimproved gravel driveway
[22:42:41] <Hyratel> I'm actually thinking small gass, or battery though
[22:47:50] <Hyratel> rue_shop3, I have intermittent access to a lawn tractor with a transaxle with sheared off splines on the input shaft
[22:47:59] <Hyratel> at least I think that's what happened
[22:48:27] <Hyratel> I think that would make a good donor for a DIY hand tractor
[22:57:03] <dpg_> sup Hyratel