#robotics Logs
Sep 26 2018
#robotics Calendar
12:57 AM flav0r: just working on changing the part for some components in eagle
01:01 AM flav0r: so i can finish this board design off
01:01 AM flav0r: and also writing a bit of code for my parts organiser
01:06 AM rue_mohr: http://www.jst-mfg.com/product/pdf/eng/eZH.pdf
01:06 AM rue_mohr: <rue_mohr> flav0r, its just a zh connector set, what is confusing you?
01:06 AM rue_mohr: <rue_mohr> the #P is the number of wires in it
01:06 AM rue_mohr: <rue_mohr> whats to know?
01:06 AM rue_mohr: <rue_mohr> http://www.jst-mfg.com/product/pdf/eng/eZH.pdf
01:06 AM flav0r: dude
01:06 AM flav0r: thats old news
01:06 AM flav0r: AND
01:06 AM flav0r: there was differences !
01:06 AM rue_mohr: yea, why you harassing those poor chineese
01:06 AM rue_mohr: I just grabbed a random datasheet
01:07 AM flav0r: i always get suckered into trusting the chinaman
01:07 AM rue_mohr: you weren't replying I didn't look for the matching one
01:07 AM flav0r: well the thing was … in the listing there was a cut away from a datasheet
01:07 AM flav0r: then they supplied me with the datasheet
01:07 AM flav0r: (after 3 tries with WRONG datasheets)
01:07 AM flav0r: and those 2 were slightly different
01:07 AM flav0r: so i thought .. hmm .. maybe im just miussing something here!
01:08 AM flav0r: the main issue is i dont have the part (they are SLOOOW)
01:08 AM flav0r: and i want to send the board to get made
01:08 AM flav0r: sooooooooo
01:08 AM flav0r: better safe than sorry!
01:08 AM flav0r: AND
01:08 AM rue_mohr: there will be all sorts of errors anyhow
01:08 AM flav0r: i already made that part
01:08 AM flav0r: im doing a different one now
01:08 AM rue_mohr: always in-house the first board
01:08 AM flav0r: well yeah
01:08 AM flav0r: nah
01:08 AM flav0r: its all good
01:08 AM flav0r: this is building upon others that i have made
01:09 AM flav0r: so i know the configurations “work"
01:09 AM rue_mohr: ok, computer is re-rendering the new exhaust manifold
01:09 AM flav0r: my “in house” boards are masterpieces tho !
01:09 AM rue_mohr: bed time is 9:45, currently 11:00, I think I can go to bed now
01:10 AM flav0r: 11pm is weak
01:10 AM rue_mohr: yes, its a weakday
01:10 AM flav0r: weekends are weakdays for you too!
01:10 AM flav0r: lol
01:11 AM flav0r: my pcbs can beat up your robot
01:11 AM rue_mohr: no, fri-sat I stay up all night
01:11 AM flav0r: nice
01:11 AM flav0r: https://www.youtube.com/watch?v=hGpBnB-jYa8
01:11 AM rue_mohr: I wonder dare I start a print of the new exhaust header...
01:12 AM flav0r: who dares wins
01:12 AM rue_mohr: or I can start it later
01:12 AM rue_mohr: I don't know how to cast it right now anyhow
01:12 AM rue_mohr: I want to build the wax printer
01:12 AM rue_mohr: suppose I should get on that
01:12 AM rue_mohr: it'll be abel to print chocolate tooo
01:12 AM rue_mohr: mmmmmm
01:13 AM rue_mohr: I have a lid for the coffeemaker to print too
01:13 AM flav0r: print cheese too
01:14 AM flav0r: oh
01:14 AM flav0r: reminds me
01:14 AM rue_mohr: I'm getting good at complex objects
01:14 AM orlock: lost PLA casting
01:14 AM flav0r: i put a project on the backburner
01:14 AM rue_mohr: kinda
01:14 AM flav0r: to wifi enable a coffee grinder and put a load cell in to weigh the ground coffee
01:14 AM flav0r: and a oled
01:15 AM flav0r: i need to figure a good way to detect what position its in
01:15 AM flav0r: you spin the thing to select coarseness
01:16 AM flav0r: fucking ZH connectors
01:16 AM flav0r: and chinese people
01:16 AM flav0r: bad combo
01:16 AM rue_mohr: http://ruemohr.org/~ircjunk/images/cover1.png
01:17 AM rue_mohr: that was mostly designed this morning
01:18 AM rue_mohr: http://ruemohr.org/~ircjunk/robots/sparrow1/pan4.png
01:18 AM rue_mohr: just finished opening up that exhaust port to 1"
01:18 AM flav0r: i dont do much 3d printing
01:18 AM flav0r: i use designspark mechanical
01:18 AM flav0r: well i suppose i do print a bit … but not a LOT
01:18 AM flav0r: is the point i was making
01:19 AM rue_mohr: I only print small plastic things
01:25 AM flav0r: https://www.thingiverse.com/thing:3073737
01:25 AM flav0r: print that
01:25 AM flav0r: its small
01:25 AM flav0r: its plastic
01:39 AM rue_bed: no, stilly pointless, how about a really innovative robot part
01:39 AM rue_bed: see any split "anti backlash" gears?
01:39 AM rue_bed: need to mod my 3d printer gearboxes with them
01:40 AM rue_bed: zhanx, its comming
02:04 AM flav0r: dude
02:04 AM flav0r: that one is anything but silly and pointless
02:04 AM flav0r: depending on CONTEXT
02:04 AM flav0r: you see
02:04 AM flav0r: i do some work for a company and im at their office one day
02:05 AM flav0r: i had that puzzle … and its pretty clear after a few minutes how it needs to go together .. it just requires the right dexterity and what not
02:05 AM flav0r: anyway some fucker puts it together … but it appears it doesnt really want to come apart again … maybe need to be PRIED A LOT
02:05 AM flav0r: anyway
02:05 AM flav0r: heres the part thats NOT pointless
02:06 AM flav0r: i’m gonna print another one and show it around like HEY I GOT THE DAMNED THING APART
02:06 AM flav0r: and show the guy .. and gloat
02:06 AM flav0r: THEN
02:06 AM flav0r: a few mins later ill go back to him with the assembled one
02:06 AM flav0r: and say ok may you get it apart too !
02:06 AM flav0r: that cunt will spend all day on it .. GUARANTEED !
02:06 AM flav0r: i mean ok man
05:31 AM Jak_o_Shadows: Nice veverak
05:31 AM Jak_o_Shadows: what is it
05:34 AM veverak: ship in progress
05:34 AM veverak: look: side wheel paddle steamer
05:34 AM veverak: reality: autonomous ship
05:48 AM Jak_o_Shadows: how is it powered?
05:48 AM Jak_o_Shadows: i mean, through the water
06:05 AM veverak: the wheels
06:05 AM veverak: I want to use rc servos for that (with hacked control, so it's like geared DC motor)
06:37 AM Jak_o_Shadows: yup yup
06:39 AM veverak: but have to calculate the speed
06:39 AM veverak: I am not yet sure if they are fast enough
06:39 AM Jak_o_Shadows: hmm. Bigger wheels?
07:37 AM veverak: I can scale the wheels a bit, but not much space for it
07:37 AM veverak: :)
09:13 AM rue_mohr: I dont think paddlers were designed to go fast
09:42 AM veverak: I don't need it to go fast
09:42 AM veverak: I just do not want it to go too slow
09:50 AM polprog: i was thinking abut making an autonomous/remote controller boat/floating thingy and came up with an idea of a rudder and a PC fan, like the florida swamp boats
09:50 AM polprog: because last thing i wanna do is to have to swim somewhere to clean the propeller from weeds
10:21 AM SpeedEvil: PC fan class thrust is ~0
10:21 AM SpeedEvil: you want quite a lot more power.
10:21 AM veverak: polprog: the wheels should be less painfull than the propeller in this manner
10:21 AM SpeedEvil: https://www.google.com/search?q=RC+airboat
10:21 AM veverak: but, I suppose making some "shelter" for the propeller should be enough
10:21 AM polprog: PC fan is about the form factor
10:22 AM polprog: ive got a compaq server fan that can move itself, the skateboard and the battery at full thrust
10:22 AM veverak: polprog: "air" propulsion is much less effecient I believe
10:22 AM polprog: yes it is
10:23 AM polprog: i havent done much about this project.. i wish i had more mechanical knowledge and tools
10:23 AM polprog: this is still in the theoretical phase
10:24 AM polprog: ive had sheltered propeller on a boat, those shelters mostly help against rocks and sea/lakebed
10:24 AM polprog: if you get it into weeds, its dead...
10:25 AM polprog: especially lethal for water cooled engines, where the dirt and stuff clogs the water conduits
10:25 AM veverak: I see
10:27 AM polprog: maybe im thinking too low level, instead of making the airboat i should just buy an RC one and slap some computers and micros on the deck :P
10:35 AM SpeedEvil: hovercraft are also a thing
10:36 AM polprog: i think thse might be more difficult to build
10:36 AM polprog: those*
10:36 AM SpeedEvil: Sure.
10:37 AM polprog: im not sure how would i balance it, probably some control theory stuff that i have no idea about
12:30 PM grazzolini is now known as Guest99291
02:27 PM veverak: step by step
02:27 PM veverak: https://imgur.com/a/zJBcfl5
02:42 PM flav0r: well fuck me .. the 2 shipments fromt he chinese i have been waiting quite some time for are apparently finally in the country
02:42 PM flav0r: i paid for faster shipping
02:42 PM flav0r: what are the chances they sent it regular speed and pocketed the difference
02:42 PM flav0r: 100% !!!
02:43 PM flav0r: 12-20 day shipping
02:43 PM flav0r: one ordered August 13
02:44 PM flav0r: the other august 20
02:44 PM flav0r: DEVIOUS !
02:45 PM vampirewings: sometimes with free shipping i get shit in 7 days
02:45 PM vampirewings: sometimes with fancy expensive shipping it takes 2 months to arrive
02:46 PM flav0r: well i just file disputes on all of it
02:46 PM flav0r: :)
02:46 PM flav0r: some stuff arrives int he country after 8 or 9 days
02:46 PM flav0r: its all good
02:46 PM flav0r: ive been waiting for one of them tho to verify it before i send a pcb out to be made
02:47 PM flav0r: so that was somewhat frustrating
02:47 PM flav0r: was gonna send today … but now i might aswell wait since it will be here very soon
02:47 PM flav0r: blah blah blah
02:51 PM veverak: hmm
02:51 PM veverak: let's say I have one motor
02:51 PM veverak: and I would like to have two outputs, and one servo setting the ratio of RPM between the outputs
02:51 PM veverak: I suppose there should be differential-like mechanism for this?
07:03 PM Fear is now known as Guest27852
07:44 PM rue_mohr: easy, but I cant help ya
07:44 PM rue_mohr: Tom_L, no packages from china today :(
07:44 PM rue_mohr: but I got a package from the usa!
07:45 PM rue_mohr: oooo
07:45 PM rue_mohr: :) and only one has an index slot
07:46 PM rue_mohr: thankyou
07:48 PM Tom_L: oh really?
07:49 PM Tom_L: hope those work better
07:49 PM rue_mohr: did that arrive faster?
07:49 PM Tom_L: i wasn't really paying attention
07:49 PM rue_mohr: me either
07:49 PM Tom_L: 18th shipped
07:49 PM rue_mohr: 8 days?
07:49 PM Tom_L: i made a note this time cause i knew i'd forget
07:49 PM rue_mohr: sounds quick
07:50 PM Tom_L: did i send the screwed up one too?
07:50 PM Tom_L: i couldn't remember
07:50 PM rue_mohr: screwed up? or indexed?
07:50 PM Tom_L: i started running the wrong program and caught it
07:51 PM rue_mohr: a screwup is only a screwup if your being too specific about the goal
07:51 PM Tom_L: the slot is in the middle of the others right?
07:51 PM rue_mohr: y
07:51 PM Tom_L: yeah that was an accident
07:52 PM Tom_L: gonna get me a couple single point thread mills to play with i think
07:52 PM rue_mohr: the thought went thru my head to make a cnc lathe to make the neck peices
07:54 PM Tom_L: i'm sure some of those need debur'd
08:20 PM flav0r: noobs
08:34 PM flav0r: https://seattle.craigslist.org/d/free-stuff/search/zip
08:35 PM flav0r: check that out a free cat
08:35 PM flav0r: can you imagine if someone claimed that cat
08:35 PM flav0r: then sent the original owners a video of them shooting the cat