#garfield Logs
Apr 25 2020
#garfield Calendar
12:06 AM zhanx: ok circuit is working for the servo's on the breadboard.
12:11 AM zhanx: but its simple so...
12:11 AM rue_mohr: ?
12:11 AM rue_mohr: I need to test my buddies computer
12:11 AM zhanx: test it
12:11 AM zhanx: i updated to ubuntu 20.4 today
12:11 AM rue_mohr: yea I need to know why my 5.4.1 kernel is corrupting nfs4
12:11 AM zhanx: i noticed after updating my kernel panic's on the wifi stopped completely
12:11 AM zhanx: so i should have a more stable connection
12:11 AM rue_mohr: hmm
12:11 AM rue_mohr: your not using a wifi appliance
12:23 AM zhanx: rue_mohr, gonna start printing the robot tomorrow
12:25 AM rue_mohr: k
12:25 AM rue_mohr: did you see the cable joint?
12:25 AM rue_mohr: the reducing one?
12:26 AM zhanx: ?
12:26 AM zhanx: no
12:27 AM rue_mohr: https://twitter.com/nixie_guy/status/1253818467289124871
12:27 AM rue_mohr: his tweets about it are disjointed
12:27 AM rue_mohr: but its a reducing drive
12:28 AM zhanx: k
03:11 AM zhanx: well that code complies
03:12 AM Tom_L: rue_mohr, what is that guy making?
03:12 AM zhanx: Tom_L, its gear reduction servo thing
03:12 AM zhanx: i say thing as the end goal i missed
03:15 AM rue_mohr: reduction using cable
03:15 AM rue_mohr: he's following an idea he got
03:15 AM rue_mohr: I dont think he has an application
03:16 AM Tom_L: can't quite visualize how it works
03:41 AM rue_mohr: its complex
03:41 AM rue_mohr: and quite elegant
03:42 AM zhanx: it is really
04:08 AM rue_mohr: but he changed something, he's recycling the cable now and I dont quite get how
04:13 AM zhanx: ok printer is printing
04:13 AM rue_mohr: yaay
04:14 AM zhanx: looks good so far
04:15 AM rue_mohr: ah, ok, I see a missing pulley
04:15 AM rue_mohr: ok
04:16 AM rue_mohr: he has one extra bearing in there
04:18 AM zhanx: ok temp is now high for this spool
04:18 AM zhanx: hate that
04:20 AM rue_mohr: https://twitter.com/nixie_guy/status/1253958755731083264
04:20 AM rue_mohr: the threading is bothering me
04:20 AM rue_mohr: I'm sure there is a point where it goes slak
04:21 AM rue_mohr: https://twitter.com/nixie_guy/status/1253234215342288896/photo/1
04:22 AM zhanx: a/c kicked on
04:22 AM zhanx: fail but win for me, vent hits the printer saved the print
04:30 AM rue_mohr: oh man, ok I'm NOT rebooting into a test kernel at 2:30am
04:46 AM polprog: having fun i see
04:46 AM rue_mohr: the problem is in the network card driver
04:47 AM rue_mohr: seems that the rtl (amd) 8111 is infamous for all sorts of issues
04:47 AM polprog: onboard?
04:47 AM rue_mohr: yea
04:47 AM rue_mohr: I'd not been using it cause there was a problem
04:47 AM rue_mohr: then, with one of the newer kernels, I switched back to it
04:47 AM polprog: so, no onboard graphics, thats an AMD board isnt it
04:48 AM polprog: im just curious
04:48 AM rue_mohr: its a ...
04:48 AM polprog: my amd motherboard needed USB3.0 drivers to get USB3.0 ports working at all in windows
04:51 AM rue_mohr: Asus M4A77T/USB3
04:51 AM rue_mohr: the board model number is the only thing not silk screened on the board
05:38 AM polprog: that looks pretty newish
05:38 AM polprog: nice
10:53 AM rue_mohr: ok, I gotta hurry now
11:50 AM rue_mohr: I think
11:50 AM rue_mohr: something doesn't add up here
11:51 AM rue_mohr: if (tt < 4000.0) { // use cycle count over 250ms period really high freqs (1.1khz - 40khz)
11:51 AM rue_mohr: DIV256(); div = 0;
11:51 AM rue_mohr: t = 0;
11:51 AM rue_mohr: if (CH0High()) { smv = 1; }
11:51 AM rue_mohr: else { smv = 0; }
11:51 AM rue_mohr:
11:51 AM rue_mohr: TCNT1 = 65536-15625; // 250ms
11:51 AM rue_mohr: while(TCNT1 != 0) { // no, its ok, we have 100 cycles per input clock (at 40kHz)
11:51 AM rue_mohr: if (0) {
11:51 AM rue_mohr: } else if (smv && CH0Low()) { // high to low transition
11:51 AM rue_mohr: smv = 0;
11:51 AM rue_mohr: } else if ((!smv) && CH0High()) { // low to high transition
11:51 AM rue_mohr: t++; // that was one more cycle
11:51 AM rue_mohr: smv++;
11:51 AM rue_mohr: }
11:51 AM rue_mohr: }
11:51 AM rue_mohr:
11:51 AM rue_mohr: freq = 4.0 * t;
11:51 AM rue_mohr: }
11:52 AM rue_mohr: heh, on my filter profiler, when the freq is too high for the period measurement, I switch to cycle counting, but I didn't use the hardware counter for some reason....
11:52 AM rue_mohr: I wonder why
12:13 PM Tom_L: what's that for?
12:16 PM rue_shop3: freq counter
01:41 PM Tom_L: https://www.amazon.com/MOONS-Stepper-Stepping-Extruder-MS17HD2P4100/dp/B071F163WT
01:41 PM Tom_L: didn't know moon made steppers :)
03:06 PM aandrew: Tom_L: :-)
03:25 PM polprog: https://i.ibb.co/Qf7Ny6Z/obraz.png
06:10 PM rue_mohr: polprog, ?
06:11 PM polprog: just messing with solaris
06:11 PM rue_mohr: ah
07:17 PM aandrew: That’s the third time today someone’s mentioned Solaris. Why?
07:24 PM polprog: heh, dont ask me
07:24 PM polprog: imagine the anticlimax of building boost on solaris for 3h just to find out boost threads arent supported on this platform
07:24 PM polprog: and no i cant use posix threads, this is an uni assignment
07:25 PM polprog: if it was my own id probably lob the whole libboost part out of the window
07:25 PM rue_mohr: wow, the speaker pressure sensor thing worked 8/
07:25 PM polprog: nice
07:25 PM rue_mohr: I expected to fight with it for a while
07:25 PM polprog: ive done a physics assignment, faster than i expected
07:25 PM rue_mohr: and I didn't expect 1Mhz?!?
07:26 PM rue_mohr: so I wonder if the inductance is changing or the saturation characteristic
07:26 PM polprog: ill be trying feeedback oscillators next thing
07:26 PM polprog: nighters
07:26 PM rue_mohr: gnight
08:35 PM aandrew: so now that your fun project was done so early what are you doing the rst of the night rue_mohr
09:59 PM rue_shop1: I'm working on downconverting it
09:59 PM rue_shop1: I got it working
09:59 PM rue_shop1: BUT
09:59 PM rue_shop1: I require a WHOLE 74hc86 for ONE GATE
10:00 PM rue_shop1: its driving me crazy
10:00 PM rue_shop1: and I cant find another xor route for less than 14 holes
10:00 PM rue_shop1: (I meansure "smaller" by required pin allocation)
10:01 PM rue_shop1: I got a huge signal range
10:02 PM rue_shop1: 10kHz-100kHz
10:05 PM Tom_L: grabcad has a shitload of respirators now
10:09 PM rue_shop1: got it!
10:09 PM rue_shop1: I'm not trying to do a ventilator with this
10:10 PM rue_shop1: its a pressure sensing techniquie thats really cooo
10:10 PM rue_shop1: l
10:26 PM zhanx: i stopped printing the bot
10:26 PM zhanx: I realized, I better test fit before I keep going
10:31 PM rue_shop1: yup
10:33 PM zhanx: i am thinking
10:33 PM zhanx: Should I train my bot with a neural network to move instead of programming it