#robotics | Logs for 2016-08-24

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[00:00:46] <Casper> your fault! you shouln't have rolled on a spider! poor spider...
[00:02:13] * rue_shop4 rubs his ass *arg*
[00:02:35] <mrdata> rue_shop4, be thankful it isnt hogweed
[00:02:47] <mrdata> that can give you a rash for seven years
[00:03:05] <rue_shop4> I got distracted from my project, I'm trying to print a 5mmled to GE344 adapter
[00:04:21] <rue_shop4> cause apparently china dosn't do that yet
[00:04:23] <mrdata> go for it
[00:04:48] <rue_shop4> nor thingiverse
[00:06:14] <rue_shop4> I'm on the 7th version, the 10cm of filament that was in the printer is almost used up, I only have about 2cm left on it
[00:08:00] <mrdata> not much. time to feed a new spool
[00:15:09] <rue_shop4> IT WORKS!
[00:15:26] <rue_shop4> its the where the peice broke off from the spool
[00:15:28] <rue_shop4> brittle
[00:16:06] <rue_shop4> I wonder if I should sell GE344 leds on ebay for a while
[05:04:56] <rue_bed> cant sleep, coded and tested the isp to serial for the mega8, its working now
[05:05:20] <rue_bed> had issues with timing on the 'get my byte ready' part
[05:05:38] <Jak_o_Shadows> I was dealing with a friends i2C IMU today
[05:05:55] <Jak_o_Shadows> The interface board they had had made had diodes for protection - which stuffed up the i2c
[05:06:10] <rue_bed> heh, too much capacitance?
[05:06:53] <Jak_o_Shadows> Dunno. We handed it off to the guy who made the interface board
[05:07:02] <Jak_o_Shadows> "We think it's this, good luck"
[05:08:09] <rue_bed> my brain is failing
[05:08:37] <rue_bed> I have this bit packing alg, and there is an unpacking state machine for it, but I dont remmeber what code its in
[05:10:18] <rue_bed> I keep using it for 10 bit data streams
[05:10:24] <rue_bed> multichannel
[05:11:27] <Jak_o_Shadows> I'm still fighting with my camera
[05:13:10] <rue_bed> aha
[05:13:21] <rue_bed> if (state == 0) {
[05:13:21] <rue_bed> if ((data & 0x80) == 0) {
[05:13:21] <rue_bed> state = 1;
[05:13:21] <rue_bed> command = (data >> 3);
[05:13:21] <rue_bed> argument = (argument & 0xFFF8) | (data & 0x07); // glue in its 0 through 2
[05:13:21] <rue_bed> }
[05:13:23] <rue_bed> } else {
[05:13:25] <rue_bed> state = 0;
[05:13:27] <rue_bed> if ((data & 0x80) != 0) {
[05:13:31] <rue_bed> argument = (argument & 0x0007) | ((data & 0x7F) << 3); //glue in bits 3 through 9
[05:13:33] <rue_bed> return servoCmd(command, argument);
[05:13:35] <rue_bed> }
[05:15:18] <rue_bed> it assures proper framing
[05:15:50] <rue_bed> I get 14 bits in 2 bytes, 10 for values and 4 for channel
[07:41:12] <SpeedEvil> Fun.
[07:41:20] <SpeedEvil> Today I learned that you can hear flies walk.
[07:41:36] <SpeedEvil> I had a sheet of paper lying on top of a bowl.
[07:41:59] <SpeedEvil> The steps (of the bluebottle) are quite audible as clicks at ~10hz.
[07:44:33] <deshipu> human hearing is very sensitive
[07:44:49] <deshipu> that's how foxhole radio can work just powered by the radio waves
[08:07:35] <z64555> well, at least it begins as very sensitive
[08:08:05] <z64555> then you have asshole drummers trying to make each other deaf
[08:09:55] <deshipu> asshole drummers sounds painful
[08:11:51] <joga> quite
[08:12:31] <deshipu> especially a rim shot
[13:00:15] <z64555> anybody happen to know how to figure out the strength of a fastener? doing a patch job on a collapsing roof and I want to make sure I don't put too few in
[13:10:10] <deshipu> tug at it?
[13:18:36] <z64555> yeah, I supposed I can do a field test with some scrap wood
[20:43:35] <Casper> z64555: there is some charts here and there, but screws may be an issue as the wood is quite variable...
[20:44:20] <Casper> mathias wandell did some tests on #8 screws and found quite a big difference in the same piece of wood from the "left" and "right" side of the plank...
[21:21:50] <z64555> Casper: Yeah, that's where statistics comes into play
[21:23:59] <Casper> I think one screw he got 180lb and the other side was 225lbs
[21:24:11] <Casper> just because the wood grain was denser on one side
[21:25:29] <z64555> If one screw holds at least 180lbs, then I'd say that'd be good enough
[21:26:38] <z64555> it's not a high-load structure, just enough to keep the roof up and a person or two
[21:39:20] <rue_shop3> yay, the state machine works, its decoding the data just fine.
[21:40:38] <rue_shop3> 04=03FF
[21:40:38] <rue_shop3> 05=03FF
[21:40:38] <rue_shop3> 06=03FF
[21:40:38] <rue_shop3> 07=03FF
[21:40:38] <rue_shop3> 08=03FF
[21:40:39] <rue_shop3> 09=0039
[21:40:40] <rue_shop3> 00=0228
[21:40:42] <rue_shop3> 01=03FF
[21:40:44] <rue_shop3> 02=03FF
[21:40:47] <rue_shop3> 03=03FF
[21:41:14] <rue_shop3> it would be nice if I could just ISP over 16 bits
[21:43:46] <rue_shop3> as soon as I ditch the rs232 serial, I can find out what kinda transfer rate I can get happening
[21:45:07] <Tom_itx> mesa has gone to using ethernet cards as well
[22:52:29] <rue_shop3> mesa?
[22:52:33] <rue_shop3> cnc?
[22:52:49] <rue_shop3> ethernet isn't low or fixed latency
[22:53:57] <rue_shop3> I got more work done on the new boiler
[22:54:27] <Casper> big kettle?
[22:54:58] <rue_shop3> no, forced downdraft hybrid conversion reactor
[22:55:22] <rue_shop3> fer heatin water that makes the house warm in winter for cheap
[22:55:42] <rue_shop3> and, if I get things togethor, the shop too
[22:56:15] <rue_shop3> so, my tiny26 slave adc works
[22:56:29] <rue_shop3> which means I'm just into doing up the servo loop controller
[22:56:56] <z64555> forced downdraft? hm. similar to a helsh tube?
[22:56:59] <rue_shop3> I suppose next I should pull in the pwm controller chip code, maybe just have it shuttle 16 adc values to the pwm chip
[22:57:08] <rue_shop3> dunno a helsh
[22:58:00] <z64555> it's a tube with a cone on one end. a blower blasts air into the tube at one end perpendicular to the tube's axis
[22:58:03] <Casper> father replaced his oil fired boiler (home heating for an electric one
[22:58:12] <Casper> so kinda a big kettle
[22:58:23] <Casper> must have a pic somewhere...
[22:58:25] <z64555> *Hilsh
[22:58:33] <z64555> **Hilsch
[22:58:37] <rue_shop3> fires burn better under low pressure, so I pull the exhaust out
[22:58:41] <z64555> https://en.wikipedia.org/wiki/Vortex_tube
[22:58:57] <rue_shop3> no
[23:00:32] <rue_shop3> so, with 10 channels from the tiny26, I need to get 6 channels from the atmega8,
[23:00:44] <rue_shop3> and then I have the 16 channels to send to the pwm chip
[23:00:50] <rue_shop3> hey I wonder
[23:00:58] <rue_shop3> a differential servo amp
[23:01:34] <rue_shop3> one side would be the control, the other side would be the feedback, there would be gain
[23:02:41] <rue_shop3> need to design a board for the generic adc system
[23:03:13] <Casper> http://i.imgur.com/AxsMe3J.jpg <=== father's boiler, that I installed...
[23:03:43] <rue_shop3> verry commercial
[23:03:51] <Casper> 15kW
[23:04:29] <Casper> and no, that is not commercial at all, residential grade
[23:04:50] <orlock> But it was made by a company, right? :)
[23:05:23] <Casper> http://i.imgur.com/IKfzvaf.jpg
[23:05:58] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1030521-heatplantwhole.jpg
[23:06:00] <rue_shop3> OLD image
[23:06:15] <rue_shop3> apparently I'v not taken anything other than a closeup in years
[23:06:42] <Casper> I added 2 relays inside the unit, to turn on each pump
[23:07:10] <rue_shop3> I made mine from hot water tanks and 54 pieces of 1.25" tube
[23:07:13] <rue_shop3> and plate steel
[23:07:25] <orlock> rue_shop3: http://gason.com.au/index.php/jindara-wood-heaters-paramount/pilbara-small-freestanding-detail
[23:07:28] <orlock> Thats what we have
[23:07:30] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1060874.jpg
[23:07:37] <Casper> what welding process?
[23:07:38] <rue_shop3> I cast my own pulllies for the motor
[23:07:48] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1060889.jpg
[23:07:52] <orlock> There's a 24v fan with decent CFM in there as well to pump air through it to be heated
[23:08:17] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1060890.jpg
[23:08:23] <rue_shop3> its a disability chair motor
[23:08:42] <rue_shop3> its run from a multitap transformer, I have 8 speeds under computer control
[23:09:02] <orlock> That's feeding in chips?
[23:09:03] <orlock> or for vent/flue control?
[23:09:14] <rue_shop3> (the crosses on the shed are form alightment marks incase anyone is wondering)
[23:09:23] <rue_shop3> no chips, FIREWOOD
[23:09:35] <rue_shop3> the draft fan IS the vent and flue
[23:09:43] <rue_shop3> the fire goes out if the fan is left off
[23:10:20] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/tempsens.jpg
[23:10:30] <rue_shop3> i2c temp sensors monitor all the water temps
[23:10:49] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1050604.jpg
[23:10:55] <rue_shop3> it runs HOT, eats steel
[23:11:02] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1050605.jpg
[23:11:08] <rue_shop3> breakfast, lunch and supper
[23:11:34] <rue_shop3> every 2 yeras I need to do a moderate rebuild, this year, its a complete reconstruction
[23:12:00] <orlock> oh wow - why does that happen?
[23:12:09] <orlock> It's not rust?
[23:12:22] <rue_shop3> no, its FeO3
[23:12:50] <orlock> ...
[23:12:57] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1020826.jpg
[23:13:00] <rue_shop3> speed controller
[23:13:57] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1020582.jpg
[23:14:06] <rue_shop3> there were some big fail ideas
[23:14:23] <Casper> sadly, the city would forbid it
[23:14:30] <Casper> because it run on wood
[23:14:37] <rue_shop3> my house leaks heat like crazy
[23:14:47] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1020548.jpg
[23:14:54] <rue_shop3> there is that ring when it was new
[23:15:12] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1010839.jpg
[23:15:17] <rue_shop3> that really didn't work
[23:15:34] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1010833.jpg
[23:15:40] <rue_shop3> heated the shed great tho
[23:16:34] <rue_shop3> http://ruemohr.org/~ircjunk/projects/heatplant/p1010743.jpg
[23:16:58] <rue_shop3> THAT thing puts out more than enough heat to do the whole house, but needs to be fed dry wood chips, which become impractical
[23:17:32] <orlock> Ahh
[23:17:44] <Casper> rue_shop3: have you checked around you for saw dust?
[23:17:59] <Casper> many compagny would pay to get rid of it
[23:18:01] <rue_shop3> I can get wood chips, I cant dry them
[23:18:41] <Casper> then, take the chemney, feed it to a drum, put wet wood chip there?
[23:19:26] <The_Jester> greets to all
[23:22:32] <Casper> all but one not greets you back
[23:23:28] <The_Jester> Yeah im really feeling the love!
[23:23:55] <The_Jester> great sense of community
[23:26:26] <Casper> but you got an answer!
[23:26:36] <Casper> and it was a positive one!
[23:27:18] <Casper> could have been a full place yelling "get the f* out as****e!!"
[23:30:00] <orlock> http://www.fluke.com/fluke/auen/digital-multimeters/wireless-testers/fluke-279-fc.htm?pid=80929
[23:34:25] <Casper> is there an inexpensive material that could be used to cover the walls of a welding booth that is more like plywood?
[23:35:07] <rue_house> hardyboard
[23:36:46] <Casper> any other common name?
[23:39:51] <anonnumberanon> rue_house, hi how do you paste code line by line into irc?
[23:46:00] <rue_house> its a rate limiter built into the client
[23:46:10] <rue_house> I just paste a block and it does traffic control