#robotics Logs

Feb 28 2017

12:55 AM rue_house: I'm not sure how I want to do sliders for the next cnc machine
12:58 AM rue_house: maybe I should stick with gradual mutations of what i have
02:44 AM Jak_o_Shadows: Nah, I got the rod-end type ones rue. Not the magnetic.
02:44 AM Jak_o_Shadows: I figured the magnetic ones probably wouldn't handle shearing type loads too well
02:45 AM Jak_o_Shadows: Go for gradual modifications of the stuff that moves.
02:45 AM Jak_o_Shadows: Go with drastic for the static stuff
05:24 AM Tomahawk_Zidane: is C the standard language for working with robotics nowadays?
05:24 AM Tomahawk_Zidane: probably weaponry too huh?
05:25 AM veverak: C in weaponry
05:25 AM veverak: RUUUUUN
05:29 AM Jak_o_Shadows: What, you'd prefer APL or Ada?
05:44 AM deshipu: ada is the standard in military uses
05:45 AM deshipu: Tomahawk_Zidane: C is the standard language practically anywhere
05:45 AM deshipu: Tomahawk_Zidane: because it's so portable
06:04 AM Tomahawk_Zidane: i see.
06:04 AM Tomahawk_Zidane: but why ADA?
06:05 AM Tomahawk_Zidane: in mechanical engineering, it's C programming right?
06:08 AM deshipu: ada has a very specific type system that really matches with the military mindset
06:48 AM deshipu: veverak: so I ordered a chinese quadruped kit very similar to Tote
06:48 AM deshipu: veverak: and it just arrived, and I'm really impressed
06:54 AM veverak: link? :)
06:58 AM deshipu: veverak: https://www.aliexpress.com/item/SunFounder-Wireless-Telecontrol-Crawling-Quadruped-Robot-Kit-for-Arduino-DIY/32384309919.html
07:37 AM veverak: wow
07:37 AM veverak: sweet
07:37 AM veverak: deshipu: how does it walk?
07:42 AM deshipu: veverak: I didn't assemble it yet, I just received the box
07:42 AM deshipu: veverak: I will put it together this evening and test
07:43 AM veverak: cool
07:43 AM deshipu: it uses huge batteries
07:43 AM * veverak is moving tomorrow
07:43 AM deshipu: to Brno?
07:43 AM veverak: hope last time for next 2 years at least
07:43 AM veverak: deshipu: within Brno
07:43 AM deshipu: ah, that's not bad
07:43 AM veverak: still messes up with everything
07:43 AM veverak: but, finally from student dormitory to decent flat
07:43 AM deshipu: woo, adult life :)
07:44 AM veverak: nope, just shared living with other people :D
07:44 AM veverak: but let's say that quality of student dormitory of my uni
07:44 AM veverak: well
07:44 AM veverak: ...
07:44 AM veverak: :)
07:44 AM deshipu: yeah, but then you get all sorts of perks
07:47 AM veverak: anyway
07:47 AM veverak: my robotic life is now fully submerged in C++ coding
07:52 AM deshipu: yeah, that's what happens with anything more advanced
07:52 AM deshipu: especially if you want to use existing libraries
08:04 AM veverak: :)))
08:04 AM veverak: but hey
08:04 AM veverak: got full json serialization of main internal data strcuture (algorithm launches group fo algorithms against one central data structure)
08:04 AM veverak: and got several tools to visualize it/debug it
08:05 AM veverak: that costs something but seems worth it for now
08:11 AM veverak: deshipu: btw: that idea with stickers on pin headers is amazing
08:13 AM deshipu: veverak: yeah, arduino now prints that stuff on the headers
08:18 AM Snert: http://gizmodo.com/boston-dynamics-newest-robot-moves-like-a-donkey-on-rol-1792795672
02:17 PM rue_house: 3 lunch options
02:17 PM rue_house: option 1: a small potato soup
02:17 PM rue_house: option 2: a large potato soup
02:17 PM rue_house: option 3: a medium potato soup
02:19 PM deshipu: and an extra potato on the side
02:19 PM deshipu: do you want fries with it?
02:45 PM rue_house: hashbrowns and perogies?
02:50 PM rue_house: hmm
02:50 PM rue_house: I'm trying to grasp, realistically, speeds and feed rates for routing bits
02:50 PM Tom_L: being a bum today?
02:50 PM rue_house: part of the realistic is limiting the power exterted to what the motor can do
02:51 PM rue_house: no, the mechanic shop can NOT diagnose the hydraulics on the lift truck
02:51 PM Tom_L: i have some slide rules that figure feed/speed ->hp
02:51 PM rue_house: SO I had to step in, bring the truck home and rebuild a valve block
02:51 PM Tom_L: for a particular size cutter iirc
02:51 PM rue_house: does it go down to like, 50W?
02:51 PM rue_house: 1/8" aluminum
02:52 PM rue_house: (1/8 cutter)
02:52 PM Tom_L: i'd have to dig em out and look
02:52 PM Tom_L: i seldom ever used them
02:52 PM rue_house: right now I'm using 5krpm, with a 1mm bit at 10mm/min
02:52 PM rue_house: but I think its in wear, not cut mode
02:52 PM anniepoo_: 8cP have had no time for fun snailing
02:53 PM rue_house: the other dimension is the side load on the bit
02:53 PM rue_house: anniepoo_, workworkwork?
02:53 PM rue_house: nothing I'v seen yet mentions how much side load you can put on a 1mm dia, 10mm long carbide butting bit
02:54 PM rue_house: cutting
02:54 PM rue_house: I have the lift truck here, and I have a light I want to put up, and I'll be damened if I can find the bracket for it
02:54 PM rue_house: :(
02:55 PM rue_house: I pulled two bits of plastic out of a check valve, I'm gonna go test it now
02:56 PM Tom_L: you better find your bracket firs
02:56 PM Tom_L: t
02:56 PM Tom_L: i wouldn't officially be fixed until you used it to mount somthing up high
05:44 PM anniepoo_: yah, rue, it's workworkwork
11:25 PM rue_house: thaaaaaats intersting...
11:25 PM rue_house: the sherline motor is rated for 60W
11:26 PM rue_house: the RC motor I just got from aliepxress is "100W"
11:26 PM rue_house: and its smaller than the motor I used in the machien I just made
11:26 PM orlock: brushed/brushless?
11:26 PM rue_house: (the motor I bought is a '540' the motor in the one I just made is a "775"
11:26 PM rue_house: brushed
11:26 PM rue_house: cause brushed is waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay cheaper
11:27 PM rue_house: I'm exaggerating, they are cheaper than that
11:27 PM orlock: heh interesting though obvious thought would be they lie
11:27 PM orlock: i just got a pile of t-slot extrusion
11:27 PM orlock: not the good-good stuff though
11:28 PM rue_house: well, china numbers are always smaller, for example, a chinese amp is, from what I can figure, about 3/4 of a north american amp
11:28 PM orlock: it's maybe 1" square or 2cm square and only has channels on a few sides
11:28 PM rue_house: power etc follow
11:29 PM rue_house: I think even their volt is smaller, I hooked something up to a supply that was the "maximum input voltage" and it blew up
11:29 PM rue_house: *sigh*
11:29 PM rue_house: (it wasn't unexpected)
11:29 PM rue_house: I was mostly curious
11:33 PM orlock: rue_house: http://en.crypt.net.au/Assorted/IMG_1466.JPG
11:33 PM orlock: http://en.crypt.net.au/Assorted/IMG_1465.JPG might be better actually
11:34 PM orlock: the header sockets don't have any plastic housing
11:34 PM orlock: and the pins didn't go in
11:34 PM orlock: Good thing i decided to check it out before plugging it in
11:34 PM orlock: its a 12v elcheapo media player
11:44 PM rue_house: heh
11:45 PM rue_house: I wonder why there is no shroud on the clips
11:45 PM rue_house: the current motor, when I load it, runs about 4V at 21A
11:45 PM rue_house: so ~84W
11:46 PM rue_house: if the 540 motor is rated at 100w, the 775 must be pretty high