Back
[00:03:20] <rue_shop5> wow
[00:03:53] <rue_shop5> I wonder how many engies an engine can pull
[00:04:06] <katsmeow> big hunk of it is the coal industry collapse, the rest is them simply not competing with barges on rivers
[00:04:49] <rue_shop5> its like human energy consumption has dropped
[00:05:31] <katsmeow> no, the power plants have switched to natural gas because of fracking
[00:05:47] <katsmeow> it's cheaper, and doesn't involve trains
[00:07:47] <katsmeow> train outage ; see: snow
[00:08:12] <katsmeow> train outage ; see: truck/bus/car on track ; see: derailment
[00:13:52] <rue_shop5> can I lm393 operate within 0.6V of vcc?
[00:14:09] <rue_shop5> funny, cause the gas industry died here
[00:14:19] <rue_shop5> power plants?
[00:14:27] <rue_shop5> you mean the usa was still being run off coal?
[00:14:44] <katsmeow> yep
[00:14:51] <rue_shop5> oh god...
[00:15:27] <rue_shop5> damnit, vcc-1.5
[00:16:31] <rue_shop5> so,
[00:16:44] <katsmeow> so
[00:16:55] <rue_shop5> I need to drop vcc thru 3 diodes before I hit the current sense resistor
[00:17:12] <rue_shop5> er, drop the motor + supply
[00:17:23] <rue_shop5> maybe I can
[00:17:24] <rue_shop5> ..
[00:17:42] <rue_shop5> lets say I put the operating point at v+ -2V
[00:17:51] <rue_shop5> each coil runs 1.4A
[00:18:15] <rue_shop5> root@blackie2:/tmp# ohm -i 1.4 -v 2
[00:18:15] <rue_shop5> Wattage is: 2.800000
[00:18:15] <rue_shop5> Current is: 1.400000
[00:18:15] <rue_shop5> Voltage is: 2.000000
[00:18:15] <rue_shop5> Resistance is : 1.428571
[00:18:19] <rue_shop5> 3W!
[00:18:50] <katsmeow> sounds high for a lil stepper
[00:18:54] <rue_shop5> well, whats the diode drop
[00:19:08] <rue_shop5> root@blackie2:/tmp# ohm -i 1.4 -v 0.7
[00:19:09] <rue_shop5> Wattage is: 0.980000
[00:19:09] <rue_shop5> Current is: 1.400000
[00:19:09] <rue_shop5> Voltage is: 0.700000
[00:19:09] <rue_shop5> Resistance is : 0.500000
[00:19:11] <rue_shop5> 1W, ouch
[00:19:18] <rue_shop5> its not a little steper
[00:19:50] <rue_shop5> I dont have any 3W resistors,
[00:19:59] <rue_shop5> and I dont have any 1.5ohm 3W resistors
[00:20:04] <rue_shop5> ah wait
[00:20:07] <rue_shop5> I'm an idiot
[00:20:26] <rue_shop5> I dont need to drop the ACTUAL sense voltage at the current level
[00:20:35] <katsmeow> this is why i keep various electric heater cores from house furnaces
[00:20:39] <rue_shop5> I can use the 0.5Ohm and drop it between the sense and the amp
[00:21:06] <rue_shop5> so, I take the sense line from the resistor, and drop it thru a blue led
[00:21:30] <rue_shop5> or a 2.4V zener, but thats less cool
[00:21:38] <katsmeow> ah
[00:21:38] <rue_shop5> ok
[00:21:54] <rue_shop5> that means I have no idea what to set the vref to, but whatever
[00:22:32] <katsmeow> is the led votage stable during temperatire and aging?
[00:25:12] <katsmeow> i checked on cost to have some 2.5 inch thick steel plate cut to a Z shape, 12 x 6 x 2 , and 2.5 x 2.5 : $43
[00:26:38] <katsmeow> 2.5 x 2.5 can be cut down to fit those 20 huge bearings i just got, can you say steam engine?
[00:26:55] <katsmeow> 50mm = 2.34"
[00:28:39] <katsmeow> turn down the 2.5 to 2.34
[00:33:12] <rue_shop5> ok, when the current sensor was from ground, it would go above the vref when it needed to be turned off
[00:33:31] <rue_shop5> now its down from positive, so its gonna go lower than vref and I need to swap the comparitor inputs
[00:34:16] <rue_shop5> kat needs a BIG plasma cutter
[00:35:08] <rue_house> gee whiz, I was all looking forward to having a visitor, and its a no-show
[00:36:37] <katsmeow> humans are like that
[00:37:26] <katsmeow> got a site for entering crank throw and piston sizes and psi and rpm, to get hp?
[00:43:28] <rue_shop5> no
[00:43:36] <rue_shop5> havn't even written a calc for it
[00:43:38] <katsmeow> drat
[00:43:42] <rue_shop5> srry
[00:44:02] <rue_shop5> ok, so, the sense resistors are at about 0.7V at current
[00:44:06] <rue_shop5> the leds drop that 2.5V
[00:44:29] <rue_shop5> so, somewhere about the 3.2V mark from v+ I want the vref
[00:44:47] <rue_shop5> its 12V, if I pick a pot of...
[00:44:57] <katsmeow> marigolds!
[00:45:01] <katsmeow> poppies?
[00:45:06] <katsmeow> carnations!
[00:46:45] <rue_shop5> 5k
[00:47:05] <rue_shop5> and sinve I want about 3.2V, I'll go 6V across it
[00:47:48] <rue_shop5> root@blackie2:/files/programming/c/resistor# ./R1
[00:47:48] <rue_shop5> +V
[00:47:48] <rue_shop5> R2
[00:47:48] <rue_shop5> VR1
[00:47:48] <rue_shop5> R1
[00:47:48] <rue_shop5> GND
[00:47:50] <rue_shop5> Divider supply: 12
[00:47:52] <rue_shop5> top resistor: 5000
[00:47:54] <rue_shop5> divider output: 6
[00:47:58] <rue_shop5> R1 is :5000.000000
[00:48:00] <rue_shop5> R2 dissipates 0.007200w
[00:48:02] <rue_shop5> R1 dissipates 0.007200w
[00:48:04] <rue_shop5> I'm an idiot
[00:48:06] <rue_shop5> so I'll use 4.7k
[00:48:15] <rue_shop5> that should put the setpoint pretty close to the middle of the pots range
[00:50:09] <rue_shop5> I'll pull down the leds with 10k
[00:54:55] <katsmeow> If that constant 100 lb. tangential force applied to the 12" handle (100 lb-ft of torque) causes the shaft to rotate at 2000 RPM, then the power the shaft is transmitting to the generator behind the wall is 38 HP, calculated as follows:
[00:54:56] <katsmeow> 100 lb-ft of torque (100 lb. x 1 foot) times 2000 RPM divided by 5252 is 38 HP.
[01:03:33] <rue_shop5> sounds about right
[01:03:38] <rue_shop5> rpm is out
[01:03:49] <rue_shop5> for AC
[01:04:29] <rue_shop5> did they make the cylinders for steam engines from steel?
[01:04:45] <rue_shop5> did they copper line them or something?
[01:05:26] <katsmeow> it was an math example
[01:05:36] * rue_shop5 nods
[01:05:41] <katsmeow> http://www.epi-eng.com/mechanical_engineering_basics/power_and_torque.htm
[01:18:36] <rue_shop5> I want to start at 8.8V
[01:29:57] <rue_shop5> oops, 8 from ground, not v+
[01:30:08] * rue_shop5 sets a fan to clear the smoke
[01:32:32] <katsmeow> hey! clear smoke?
[01:32:40] <katsmeow> that's a breakthru!
[01:34:09] <katsmeow> http://www.epi-eng.com/images/Engine/engine_technology_crankshaft_billet.jpg
[01:34:21] <katsmeow> milling on a lathe , porn for machinists
[01:36:03] <katsmeow> i figue i'll faceplant in 15 minutes
[01:36:13] <katsmeow> gnites
[02:00:51] <rue_shop5> AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAARRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
[20:45:56] * kat-soused *was* hurting
[20:52:24] <kat-soused> search youtube:
[20:52:28] <kat-soused> The CNC Build Part 2.mp4
[20:52:35] <kat-soused> The CNC Build Part 3.mp4
[20:52:46] <kat-soused> total = 341 MB
[20:58:33] <kat-soused> so if i use 200psi in a 8" cylinder with a 8inch stroke, 2 double-acting pistons at 90 degrees to each other, i can make 5000 ft lbs of torqe at 100 rpm which = 100 hp
[20:59:24] <kat-soused> put one in each corner of the boat
[21:09:04] <Tom_itx> huh?
[21:09:21] <kat-soused> what part?
[21:09:47] <Tom_itx> hydraulic motor?
[21:09:56] <kat-soused> "steam" engine
[21:10:02] <Tom_itx> oh
[21:10:29] <kat-soused> the cnc refs are for a 6x10 cnc table
[21:10:33] <kat-soused> not me
[21:10:40] <Tom_itx> oh
[21:11:17] <Tom_itx> good graphic cards are sure power hungry
[21:11:30] <kat-soused> fast ones are
[21:11:51] <kat-soused> you can make dumb hdmi with 1/4 watt
[21:11:51] <Tom_itx> are gigabit ones good?
[21:12:01] <Tom_itx> gigabyte
[21:12:03] <kat-soused> i dunno, i am not into graphics so much
[21:12:06] <Tom_itx> ok
[21:12:08] <Tom_itx> me either
[21:12:15] <Tom_itx> i just wanted 2 monitors
[21:12:23] <Tom_itx> went with a cheapo one for now
[21:12:29] <Tom_itx> no extra psu required
[21:12:57] <Tom_itx> i have no fancy monitors anyway
[21:13:00] <kat-soused> $30 19" lcd specials ?
[21:13:12] <Tom_itx> something like htat
[21:13:26] <Tom_itx> all analog
[21:13:32] <kat-soused> me too, tho atm i am using the 17"
[21:13:37] <kat-soused> svga
[21:14:07] <Tom_itx> although one is wide
[21:14:17] <Tom_itx> and it's my favorite atm
[21:14:25] <Tom_itx> the others are all square
[21:15:18] <kat-soused> the laptop is rectangular, i use the desktop mostly, the laptop is for watching youtubes or playing musis, things i removed fromo the desptops fo Tiggr
[21:15:55] <Tom_itx> i jsut recently updated my main one a bit
[21:16:04] <Tom_itx> it was getting pretty sloppy slow
[21:16:26] <Tom_itx> i like the improvements
[21:16:38] <Tom_itx> i5 finally
[21:17:14] <Tom_itx> ssd
[21:17:25] <Tom_itx> that was the best improvement hands down
[21:17:35] <kat-soused> will you get better life from the ssd than rue did?
[21:17:56] <Tom_itx> it had good reviews, i hope so
[21:17:58] <Tom_itx> samsung
[21:18:03] <Tom_itx> evo?
[21:18:20] <Tom_itx> got a tb and half tb ones
[21:19:11] <Tom_itx> i didn't really read much on them aforehand
[21:20:18] <kat-soused> i think rue's lasted a few months
[21:20:24] <kat-soused> i dunno details
[21:20:30] <Tom_itx> yeah me either
[21:20:35] <Tom_itx> guess time'll tell
[21:22:06] <Tom_itx> works good with cad stuff
[21:23:23] <kat-soused> the guy that did those 2 urls i first gave, lathed a large starwars Death Star of wood, which shows why you need a lathe with a 2ft faceplate
[21:26:38] <kat-soused> http://www.slate.com/blogs/the_slatest/2016/05/07/passenger_delays_flight_after_mistaking_professor_s_math_equations_for_terrorist.html
[21:30:34] <Tom_itx> sad what the world has become
[21:31:22] <kat-soused> imagine carrying 4 or 6 bottles of different color soft drinks, some shampoo and conditioner, asprin and pylenol and ibuprofen, some physics notes, a copy f the constitupid, and a tour guide book of usa monuments
[22:02:30] <rue_house> I'm back
[22:03:23] <kat-soused> i'm leaning a lil
[22:14:14] <rue_house> listing?
[22:16:09] <kat-soused> yeas
[22:16:55] <kat-soused> ever hear of the movie "Robot world" ?
[22:17:03] <kat-soused> 2016
