#linuxcnc Logs
Jun 28 2023
#linuxcnc Calendar
12:41 AM hn[m] is now known as hn98610[m]
01:58 AM XXCoder: https://youtu.be/-yabzQ6kXWw
01:58 AM XXCoder: pretty cool
04:10 AM travis_farmer[m4: Morning ☕️
04:24 AM Tom_L: morning
04:43 AM JT-Cave: morning
05:32 AM JT-Cave: mmmm coffee better this morning with the burr grinder and new coffee maker
05:35 AM Loetmichel: whats a burr grinder?
05:37 AM JT-Cave: it has two wheels with grooves and the coffee beans are ground between them so they come out a consistent size
05:39 AM JT-Cave: https://www.mrcoffee.com/accessories/coffee-grinders/mr.-coffee-12-cup-automatic-burr-grinder/SAP_2141812.html
05:41 AM JT-Cave: rooster crowed
07:43 AM Tom_L: mmm 102°F today & tomorrow
07:46 AM travis_farmer[m4: 68F with a high of 71F, with thunder storms by noon...
07:47 AM JT-Cave: we got approximately 3 drops per square inch so far...
07:49 AM travis_farmer[m4: you can buy some Maine rain from Amazon ;-) https://www.amazon.com/Poland-Spring-Natural-1-gallon-plastic/dp/B00GRALGUK
07:49 AM JT-Cave: lol
07:50 AM travis_farmer[m4: :-)
07:54 AM JT-Cave: how can I measure DC current and record it?
07:55 AM travis_farmer[m4: i would guess you need a shunt resistor, and an analog to digital converter
07:55 AM travis_farmer[m4: at the very least, that is
07:56 AM travis_farmer[m4: how much current?
07:56 AM JT-Cave: < 25A
07:58 AM travis_farmer[m4: https://www.ebay.com/itm/292280741699 should get the analog signal, then you just need an analog to digital converter
07:59 AM JT-Cave: I need a split core dc current transducer to go around a battery cable
07:59 AM rmu: JT-Cave: look for Allegro ACS712
07:59 AM travis_farmer[m4: that's what i posted rmu
07:59 AM JT-Cave: https://aimdynamics.com/dct-0016-vdc-series-by-magnelab
08:00 AM JT-Cave: close
08:00 AM rmu: yes what travis said
08:03 AM travis_farmer[m4: could adapt one of these https://www.ebay.com/itm/322947258787
08:03 AM travis_farmer[m4: outputs 1mV per amp
08:03 AM JT-Cave: interesting
08:04 AM rmu: JT-Cave: what are you trying to do?
08:04 AM JT-Cave: measure parasitic draw on a vehicle
08:04 AM rmu: maybe even the battery leads can act as a shunt
08:05 AM JT-Cave: yup thinking about that now
08:05 AM rmu: hmm. vehicle. so the device needs to tolerate starting current. maybe a few hundred A
08:06 AM JT-Cave: no, just fully awake current to sleeping current then plot it over 24 hours
08:07 AM CloudEvil: 25A is quite light for a vehicle, even absent the starter
08:07 AM JT-Cave: usually the "awake" current it around 10A on a C8
08:07 AM travis_farmer[m4: the clamp i posted only outputs 0.650V at full amps (650A), so you would need a high resolution ADC, like 16-bit, i would think
08:08 AM JT-Cave: hmm time to start my chicken shit cleaning day
08:10 AM JT-Cave: oh and when it's fully 'asleep' it only uses 10-11mA
08:11 AM Tom_L: https://monarchinstrument.com/collections/track-it-dc-voltage-current-data-logger
08:14 AM Tom_L: current not high enough
08:15 AM rmu: DMM with DC current hall effect clamp and datalogger and/or webcam
08:15 AM Tom_L: https://www.fluke.com/en-us/product/electrical-testing/digital-multimeters/fluke-289
08:16 AM Tom_L: not sure what the ranges is on that
08:17 AM travis_farmer[m4: 500uA to 10A, Tom_L
08:18 AM Tom_L: i was too lazy to look
08:18 AM travis_farmer[m4: :-)
08:18 AM Tom_L: most meters are going to top out at 10A
08:19 AM Tom_L: and i think the clamp on only work with AC but i could be wrong
08:19 AM travis_farmer[m4: that clamp probe i posted, with the datalogger JT posted, set for reading 500mV, should work... kinda an expensive setup for what it is...
08:22 AM travis_farmer[m4: generally though, the higher range it has, the lower resolution it has for mA range testing...
08:22 AM Tom_L: 30A until that copper trace fuse blows on the bottom of the board
08:23 AM travis_farmer[m4: the clamp i posted was 650A...
08:24 AM Tom_L: i missed that i guess
08:26 AM travis_farmer[m4: i have one of those clamps, BTW, for my digital oscilloscope. works well, when the battery isn't dead... haven't tried mA current readings though
08:32 AM JT-Cave: hmm pondering the whole project I think the device travis_farmer[m4 posted with a rpi and some python to record the data into a csv file I will get the information I'm looking for
08:33 AM JT-Cave: I can use my lab power supply to test the device with
08:35 AM JT-Cave: I assume it's 5vdc analog output?
08:35 AM skunkworks[m]: JT-Cave: Pine hollow auto diagnostic has done a lot of car parasitic draw videos.. He is very good and has nome nice tricks..
08:35 AM skunkworks[m]: some
08:37 AM skunkworks[m]: like https://www.youtube.com/watch?v=LKBqRs2bdYU
08:38 AM Unterhausen: smoke finally got here again
08:45 AM travis_farmer[m4: JT, in high range mode (0 to 650A) it outputs 0V to 650mV, and in low range (0 to 160A) range mode it outputs 0V to 1.6V
08:45 AM travis_farmer[m4: or do you mean the 30A one
08:45 AM JT-Shop: the 30a one
09:02 AM travis_farmer[m4: it is a bidirectional current sensor, so 0A is at 1.65V, and is 44mV per 1A, so if the current is reverse, the output will be 1.65V to 0V for -0A to -30A, and 1.65V to 3.3V for +0A to +30A
09:02 AM travis_farmer[m4: it is 0V to 3.3V output, with 5V input
03:49 PM travis_farmer[m4: well heck... the house A/C just crapped out and died... :-( me and my father will have to grab another one from WalMart tomorrow when he gets home from work. first the WiFi router, now the A/C... what's next?
03:58 PM roguish[m]: travis_farmer: I have a couple of window ac's you can have, come by and get 'em.
03:58 PM travis_farmer[m4: um, i think the distance may be a hinderance... where are you again?
03:59 PM roguish[m]: SF
03:59 PM roguish[m]: bit of a hike...
03:59 PM travis_farmer[m4: from Maine? yeah, i don't think my old truck would make it that far... ;-)
04:01 PM roguish[m]: used to have a buddy up in Portland Maine. a tanker and container ship driver.
04:01 PM roguish[m]: very cool guy
04:02 PM travis_farmer[m4: i have an uncle that was in shipping. he was a capt. now he is a safety officer, or something, company-wide
04:03 PM roguish[m]: there is a maritime academy up there, I think. we have one here. too
04:03 PM travis_farmer[m4: yeah, MMA
04:03 PM roguish[m]: that's it
04:04 PM JT-Shop: an hour of thunder for a few drops of rain...
04:05 PM roguish[m]: anyone know anything about mqtt ??
04:06 PM travis_farmer[m4: i know a little (very little, as in enough to get in trouble)
04:07 PM roguish[m]: my home automation program (homeseer.com) is growing. it's now including Zigbee hardware, and mqtt stuff
04:10 PM travis_farmer[m4: looks fancy :-)
04:10 PM Tom_L: JT-Shop, you didn't squeeze hard enough
04:10 PM roguish[m]: I've been using it for almost 20 years. since version 1, now it s up to version 4
04:11 PM JT-Shop: I had my eyes closed...
04:12 PM Tom_L: at least it's been cycling here. one day wet, next couple are a bake off
04:13 PM travis_farmer[m4: ...now if only i had smart devices... ;-)
04:13 PM JT-Shop: we got back from town and the C8 was white in the back and I was only going 4-5mph
04:13 PM JT-Shop: talk about dry
04:14 PM Tom_L: doesn't take much
04:15 PM roguish[m]: put on some Freddy Fender tunes
04:16 PM Tom_L: we need a good rain before the 4th. they lifted a city wide ban on aerial fireworks this year
04:17 PM Tom_L: and there's enough stupid in this town to repeat the great chicago fire
04:17 PM roguish[m]: Tom_L: that was a cow kicking over a lantern
04:17 PM Tom_L: yeah i know
04:18 PM roguish[m]: do you live in a stockyard ?
04:18 PM Tom_L: not anymore but there used to be one here
04:18 PM Tom_L: now they go to Dodge City afik
04:19 PM Tom_L: we don't give them lanterns anymore
04:25 PM * travis_farmer[m4 wishes he could send his rain to Tom_L
04:25 PM Tom_L: send it to jt he needs it more than me
04:26 PM roycroft: that's progress, roguish!
04:26 PM roycroft: freecad has been around for just as long and it's only up to version 0.20
04:26 PM travis_farmer[m4: i already sent him a link to buy Maine rain on Amazon: https://www.amazon.com/Poland-Spring-Natural-1-gallon-plastic/dp/B00GRALGUK
04:26 PM roycroft: according to my calculations, your software is 20 times better than freecad
04:26 PM Tom_L: fun fact: the grain elevator we have here is big enough to feed everyone in the US for 6 weeks
04:26 PM roycroft: the rain in maine falls mainly on my plain
04:26 PM Tom_L: https://www.kansas.com/latest-news/vg51th/picture853322/alternates/FREE_1140/052310debruce
04:27 PM roycroft: er, on my plane
04:27 PM Tom_L: not a toy train :)
04:27 PM * roycroft sat in bangor for reueling during a torrential downpour once
04:28 PM * travis_farmer[m4 is sorry roycroft had to experience Bangor ;-)
04:29 PM roycroft: i experienced it from the inside of a tube
04:29 PM roycroft: a tube that was not part of a series of tubes
04:29 PM roycroft: it was a stand-alone tube
04:29 PM roycroft: it wasn't that bad
04:29 PM travis_farmer[m4: at least Bangor didn't touch you ;-) (i hate big cities)
04:31 PM roycroft: i just remember the deluge
04:31 PM roycroft: but that was before i moved to the pacific northwet
04:31 PM roycroft: so maybe i remember it as rainier than it actually was
04:32 PM Tom_L: the fish gets bigger the more you tell the story...
04:32 PM roycroft: i never saw the paul bunyan statue, or anything of bangor proper
04:32 PM roycroft: just a bit of the tarmac
04:33 PM travis_farmer[m4: lol, Ton_L
04:33 PM travis_farmer[m4: Tom_L even, ol
04:33 PM travis_farmer[m4: LOL
04:34 PM Tom_L: not to keep hashing on it but i wonder if that implosion affected the titanic any
04:34 PM Tom_L: 1500ft isn't that far
04:34 PM travis_farmer[m4: i hope not
04:34 PM Tom_L: 15-16
04:35 PM Tom_L: my mind is wandering today...
04:35 PM roycroft: it was a pretty tiny submarine-like thing
04:36 PM roycroft: i'm not sure it would have had much of an effect on the titanc
04:36 PM roycroft: other than stirring up some mu
04:36 PM roycroft: d
04:36 PM Tom_L: if the oxy blew too it mihgt
04:43 PM JT-Shop: a grain elevator in Destrahan La IIRC blew up years ago and made a big mess
04:43 PM JT-Shop: there was a school next to it and they moved the school a mile away
04:43 PM * JT-Shop goes to make chicken crack
04:44 PM Tom_L: a mile wouldn't have been enough for this one
04:46 PM JT-Shop: I bet they have better static control
04:50 PM Tom_L: i think they oil it now
04:51 PM Tom_L: i'm not sure
04:53 PM Unterhausen: I need a collapsible Corsi-Rosenthal box
04:56 PM Tom_L: Using a food-grade mineral spray on grain
04:56 PM Tom_L: one method
04:56 PM roycroft: just take a regular corsi-rosenthal box and send it down on a visit to the titanic
04:56 PM roycroft: it will collapse nicely for you
04:56 PM * roycroft hopes it's not too soon ...
04:57 PM Tom_L: they made a choice, how we remember it is up to us
04:58 PM roycroft: i need another calculator
04:58 PM Unterhausen: I think the fan would keep it from collapsing
04:58 PM roycroft: i'm trying to decide between an 11c, an 32sii, or something completely different
04:59 PM roycroft: i still don't have a 16c, but they're still way too expensive, and for my workshop i really don't need the base conversion functions
04:59 PM Unterhausen: I guess I could get rid of my light box and store the filter box there
05:01 PM Unterhausen: home depot is selling 20" filters at a noticeable pace, 12 today
05:01 PM roycroft: i don't have a 15c either
05:01 PM roycroft: i don't need complex math in the shop, but it would be nice to have that model
05:02 PM Unterhausen: I should put my calculator down in the shop
05:02 PM Unterhausen: there's all these pieces of paper down there with scribbles on them
05:03 PM roycroft: i have a 48g+ for my lathe and my mill
05:03 PM roycroft: each of which has a big drawer, so i don't mind a largeish calculator there
05:03 PM Unterhausen: I might have a 48, been a while since I looked at it
05:03 PM roycroft: but by my main wood bench i would need something pretty small
05:03 PM Unterhausen: still have my 41c
05:04 PM roycroft: are you familiar with the 32sii ?
05:05 PM Unterhausen: I do have a 48G, can see the manual
05:05 PM roycroft: the 32sii is from the early '90s, and is one of my all-time favorite hp calculators
05:05 PM roycroft: but i really like the footprint of the iic, and those other early '80s models
05:06 PM roycroft: 11c, rather
05:06 PM roycroft: the 41c is pretty big
05:06 PM Unterhausen: don't think I ever used a 32
05:07 PM roycroft: https://www.hpmuseum.org/hp32s.htm
05:08 PM JT-Shop: roycroft, have you looked at the new xcs software from xtool?
05:08 PM roycroft: no
05:08 PM roycroft: i haven't even heard of it
05:09 PM roycroft: unterhausen: the 32sii is similar to the 32s, but it adds algebraic math (worthless), and fractional math (useful in the woodshop)
05:10 PM Unterhausen: fractional math might be useful
05:10 PM roycroft: so i could do 1.3.4<enter>2.1.16+
05:10 PM roguish[m]: this was my college calc https://www.hpmuseum.org/hp25.htm
05:10 PM roycroft: and the result would be 3-13/16
05:12 PM Unterhausen: my friend had a 21 or something like that in high school
05:12 PM roycroft: that thing cost you a semester's tuition, roguish!
05:12 PM roycroft: unless you were in cali, where tuition was free at the time
05:12 PM Unterhausen: they have cheap calculators that do fractions pretty well
05:12 PM roycroft: i had a slide rule in high school
05:12 PM roguish[m]: wasn't cheap. but was necessary. engineering classes
05:12 PM JT-Shop: I've gotten a couple of emails about it
05:12 PM roycroft: the first hp calculators came out when i was a junior or senior
05:13 PM roycroft: and they were outrageously expensive
05:13 PM roguish[m]: tuition was not free. reasonable, but not free.
05:13 PM Unterhausen: I had a ti 67 as my first college calculator
05:13 PM roycroft: i was making 75 cents/hour at my part-time job
05:14 PM roguish[m]: a guy i used to work for and with, first job out of uni was at hp. his first project was to put the key labels on the 35 and 45
05:14 PM roguish[m]: I still have my older brother's hp45.
05:14 PM roycroft: that was back when they were running the ads that had a car run over an hp calculator
05:14 PM roycroft: and the calculator was undamaged
05:15 PM roguish[m]: RPN for ever.
05:15 PM roycroft: yeah, of course
05:15 PM roycroft: i am lazy
05:15 PM roycroft: and () keys are expensive
05:16 PM Unterhausen: tr 58 actually, couldn't afford the card reader
05:16 PM roycroft: so algebraic notation and the lisp programming language are both right out
05:16 PM Unterhausen: $125, which was significant, but not the same as tuition
05:17 PM Unterhausen: the going price on ebay for the hp41 wand is more than the calculator
05:19 PM roycroft: you know, after thinking about this for a while, i probably don't need a new calculator
05:19 PM roycroft: my 32sii would really be ideal for the hand tool bench, with its ability to do fractional math
05:19 PM roycroft: and i haven't touched that calculator since the before times
05:19 PM roycroft: it lives in my computer backpack that i used to take with me to work every day
05:20 PM roycroft: and since my commute is now from my bedroom to my office, i haven't touched that backpack in ages
05:20 PM * roycroft thinks he'll just relocate the 32sii to the shop for now
05:20 PM * roguish[m] uploaded an image: (81KiB) < https://libera.ems.host/_matrix/media/v3/download/matrix.org/APeBWjiAZOaJHhATSnJPvnon/image.png >
05:20 PM Unterhausen: 48g apparently has fractions
05:20 PM roycroft: it really is a nice calculator
05:21 PM roguish[m]: on every windows computer I have, for years.
05:21 PM Unterhausen: no fractions
05:22 PM roycroft: i have an rpn calculator app on my iphone
05:22 PM roycroft: but i'd rather pull out an actual calculator than use a phone app
05:22 PM roycroft: what's really fun is when i'm in a group and we're talking numbers and someone asks if they can borrow my calculator
05:23 PM roguish[m]: take this for your desktop
05:23 PM * roguish[m] posted a file: (188KiB) < https://libera.ems.host/_matrix/media/v3/download/matrix.org/wgJGKCfKJqiynfWvObSmbChB/excal32_200.zip >
05:23 PM roguish[m]: it's grea
05:23 PM roguish[m]: t
05:23 PM roycroft: they spent a bunch of time looking for the = key, and get an ever increasing look of bewilderment
05:24 PM roycroft: that's a windows app, isn't it?
05:24 PM roguish[m]: I bought a good HP graphing cal for my nephew during his senior high school year. his stupid math teacher couldn't run it and made him get a TI...........
05:24 PM roycroft: it looks pretty nice, generally
05:24 PM Unterhausen: I bought the 48C in the middle of the school year, but I didn't want to switch away from the tr58 because of rpn
05:25 PM roycroft: i used a 49g+ when i went back to school and took 3rd term calculus
05:25 PM Unterhausen: but then I immediately forgot how to use the equal button
05:25 PM roycroft: the professor specified a ti graphing calculator
05:26 PM roycroft: but when i generated the correct graph with the 49g+ he told me i could continue to use it as long as i never asked him a question about it
05:26 PM Unterhausen: I carried the hp41 and the tr58 to an exam and ended up putting the 58 away
05:26 PM Unterhausen: the schools around here require a particular model of ti graphing calculator
05:26 PM Unterhausen: which saved my hp48
05:27 PM Unterhausen: rpn really warps your mind
05:27 PM roycroft: that's because the students are mostly clueless and need their hands held by the professor
05:27 PM roycroft: rpn is bloody easy
05:27 PM roycroft: and fast and efficient
05:27 PM Unterhausen: you say that as someone whose mind has been warped
05:27 PM roycroft: was there ever any doubt that i'm warped?
05:28 PM Unterhausen: all your opinions have to be deconvoluted through that filter
05:28 PM Unterhausen: it probably would take me a minute to get used to rpn again. But it's so much easier than parentheses
05:29 PM roycroft: it really is
05:29 PM roycroft: especially when you realize you need to flip items on the stack
05:29 PM Unterhausen: I always struggle with calculators that use parentheses, but generally don't think about dragging my 48 out of the filing cabinet
05:30 PM roycroft: that's why i have a pile of calculators
05:30 PM roycroft: i keep one at every workstation where i need one
05:30 PM Unterhausen: don't think that plan would work for me
05:30 PM roycroft: except my woodworking bench, which i'm gong to deal with in a couple minutes
05:31 PM roycroft: and in my office, the cad workstation does not have its own dedicated calculator
05:31 PM * JT-Shop wonders what rpn we are talking about
05:31 PM roycroft: but my main desk, which has an 11c, is about 2 steps away from the cad workstation
05:31 PM roycroft: reverse polish notation
05:31 PM JT-Shop: ah
05:31 PM roycroft: the proper way to build a calculator
05:32 PM JT-Shop: that makes more sense than Risk Priority Number (RPN) is a calculation to sort the risks from highest to lowest.
05:32 PM roycroft: i have a 12c in my office as well, but i rarely use that
05:33 PM * roycroft heads out to the shop, and will have a new-to-the-shop calculator in hand
05:35 PM Unterhausen: I guess it would be worth building a filter box. Maybe I can use it in the shop later
05:37 PM Unterhausen: I vaguely remember that I have a squirrel cage fan somewhere
05:44 PM Unterhausen: anyone have a guide for building kernels on debian?
05:46 PM Unterhausen: google fails on this, maybe I should as an ai
05:50 PM Unterhausen: bard actually gave pretty good directions
05:50 PM Unterhausen: see if it works
05:51 PM JT-Shop: mine might be a bit dated... let me find it
05:51 PM JT-Shop: https://gnipsel.com/linuxcnc/kernel.html
05:55 PM * JT-Shop calls it a day
05:55 PM TurBoss: hello JT-Shop ran the latency test for some hours and gor -35 +35 but.... forgot tu put load 🤦
05:55 PM TurBoss: s/gor/got/
05:59 PM Unterhausen: you gots to watch 10 youtube videos at once or it's not a test
06:00 PM Unterhausen: somehow firefox realized I needed a long video an suggested a very long video about fish
06:00 PM Unterhausen: It was many hours long
06:01 PM TurBoss: :O great
06:02 PM roycroft: https://www.youtube.com/watch?v=sCNrK-n68CM
06:02 PM roycroft: there's a nice long one for you
06:02 PM roycroft: you can just watch/listen to it in the background - it's very relaxing
06:02 PM XXCoder: 10 hours. is it looped? lol
06:02 PM TurBoss: 🤣
06:02 PM roycroft: yes
06:03 PM roycroft: but it's better than a 10 hour loop of baby shark
06:03 PM roycroft: uyn\\\\\\\
06:03 PM roycroft: ack
06:03 PM roycroft: unless you have a toddler that you want to be rid of for 10 hours
06:05 PM roycroft: https://www.youtube.com/watch?v=Ogk4mw1pXnE
06:05 PM roycroft: there's the 10 hour loop of baby shark
06:06 PM roycroft: that may be the ultimate all-time earworm
06:06 PM roycroft: so you're welcome :)
06:07 PM Unterhausen: okay, why are there files named "patch" and also files named "patches"?
06:07 PM * XXCoder is glad to be immune to earworms
06:07 PM Unterhausen: there is a song I listen to that cures earworms because it's very sad
06:08 PM roycroft: patches?
06:08 PM roycroft: from the clarence carter song?
06:08 PM Unterhausen: patches sounds like it might be a sad song
06:08 PM roycroft: it is
06:08 PM Unterhausen: also, if I use the wrong file to patch my kernel, it might cause sadness
06:09 PM Unterhausen: the one that works for me is lucinda williams copenhagen
06:09 PM roycroft: https://www.youtube.com/watch?v=IvfsfS6NVUc
06:10 PM roycroft: lucinda is awesome
06:10 PM Unterhausen: she was here and hung out at a bar for a while
06:10 PM roycroft: i'll never understand how so much sound can come out of such a tiny person
06:10 PM roycroft: i've seen her perform many times
06:10 PM Unterhausen: I didn't know either thing happened until later
06:11 PM roycroft: i need to head back to woodcraft
06:11 PM roycroft: this will be the second trip to springtucky this week
06:13 PM roycroft: do any of you work with live edge wood much?
06:13 PM roycroft: i need to clean up the live edge, and i'm hoping i can find some kind of sanding mop to do it without wearing it down much
06:13 PM roycroft: i think a flap sending wheel would be too aggressive
06:13 PM roycroft: any suggestions?
06:14 PM * roycroft is in new territory with this live edge stuff
06:14 PM XXCoder: oh interesting. orginal or bark edhe
06:14 PM roycroft: no bark
06:14 PM roycroft: i removed it already
06:15 PM roycroft: like four years ago
06:15 PM XXCoder: well yeah like I said, orginal shape, or bark still on edge :)
06:15 PM roycroft: yeah
06:15 PM roycroft: so i'm keeping the original shape after debarking
06:16 PM roycroft: the slab is sanded to p1500 and is almost glossy without any finish on it
06:16 PM roycroft: the "live" edge is very rough right now
06:16 PM roycroft: i'm sure i'll find something that will work and i know i can do it by hand
06:17 PM Unterhausen: homemade flap wheel with fine sandpaper?
06:17 PM roycroft: i just want to employ technology if it will save me some time - i need to install this on sunday, and i haven't started applying finish to it yet
06:17 PM roycroft: t&t varnish oil takes a while to cure
06:17 PM roycroft: i may even have to use a different finish this time
06:18 PM roycroft: there's a 'river table expert' who works at the local woodcraft
06:18 PM roycroft: he may know a good way to clean up live edges quickly
06:18 PM XXCoder: I wonder if sander sponge world work
06:18 PM XXCoder: *would
06:18 PM roycroft: and i can bite my tongue and not express an opinion about "river" tabls
06:18 PM Unterhaus_: I only have walnut slabs, so it's pretty hard to wear it down too much
06:19 PM roycroft: the sanding sponges i have are too stiff
06:19 PM roycroft: but yeah, a thin, flexible sanding sponge might work
06:19 PM roycroft: it would not be as fast as something i mount in a drill or grinder, but it would get the job done
06:19 PM * roycroft heads off to explore options
06:22 PM Unterhaus_: this whole kernel build thing would have been easier if I followed JT's directions from the start
06:22 PM Tom_L: heh
06:22 PM Tom_L: i have some notes somewhere but not online
06:23 PM Tom_L: not something you do often enough to remember off the top of your head
06:24 PM Unterhaus_: does turning off spectulative execution mitigation help anything?
06:24 PM Tom_L: i never fiddled too much with the switches
06:24 PM Unterhaus_: fiddling is fun, until it crashes
06:25 PM Tom_L: all my fiddling gets done on a test pc
06:31 PM Unterhaus_: every pc is a test pc here
06:33 PM Unterhaus_: okay, had to change it to fully preemptable from might be preemptable
06:38 PM Unterhaus_ is now known as Unterhausen
06:38 PM Unterhausen: this might take a while
06:39 PM Unterhausen: crashed because it's out of memory, doesn't seem possible
06:42 PM Tom_L: i probably didn't need it but i bumped mine up to 32G
06:43 PM Unterhausen: 14g free isn't enough to build a kernel?
06:43 PM Tom_L: i would hope so
06:45 PM Unterhausen: doesn't seem right, people are complaining about much less memory than that
06:45 PM Tom_L: mine was more to get ram for the spare MB i have
06:45 PM Tom_L: but i stuck it in the main PC for now
06:46 PM Tom_L: one was getting flakey on the SATA buss
06:47 PM Unterhausen: I think it was the -j4 command
06:47 PM Tom_L: with one ssd it's fine but i had it full and it didn't like that
06:47 PM Tom_L: maybe
06:47 PM Tom_L: what's the rule on that? one less than what you have?
06:47 PM Tom_L: i forget
06:47 PM Tom_L: maybe no
06:47 PM Tom_L: not
06:48 PM Unterhausen: one less sounds like a good idea, I didn't know what it meant originally
06:48 PM Tom_L: cores
06:48 PM Unterhausen: I knew that, but Ididn't know it meant that's how many the build uses
06:49 PM Unterhausen: doesn't look good on just using 2
06:49 PM Unterhausen: yeah, it just crashed
06:49 PM Tom_L: i was looking into an i5 with 6 cores but it takes a different socket
06:49 PM Unterhausen: i was looking into a faster processor, but it costs more than the computer
06:50 PM Unterhausen: although the computer only cost $35
06:50 PM Tom_L: i found my i5 is faster than the i7
06:50 PM Unterhausen: I just did plain old make
06:50 PM Unterhausen: no asking for more cores
06:51 PM Tom_L: i got a heatsink coming for the i7 so i can put it in that old MB and see if i can use it for tests
06:52 PM Tom_L: i may have another psu i can use, i'll have to look
06:52 PM Tom_L: definitely could use a couple more boxes
06:54 PM Unterhausen: my main computer is still a dual xeon
06:55 PM Unterhausen: only 8 cores
06:55 PM Tom_L: i wish
06:56 PM Unterhausen: 13 years old
06:56 PM Tom_L: my stuff is all old
06:56 PM Tom_L: maybe not quite that old
06:56 PM XXCoder: 128 core cpu is coming out soon
06:56 PM Tom_L: yeah for a bazillion dollars
06:56 PM XXCoder: over $5,000 dollars for it lol
06:56 PM Unterhausen: when I bought it, it was still on the cpu benchmarks, about half as fast as the best
06:57 PM Unterhausen: I saw the new amd is $11k in quantity 1000
06:57 PM Unterhausen: old dell workstations are pretty good
06:57 PM Unterhausen: where as old optiplexes are junk
06:58 PM Unterhausen: of course, I'm currently compiling the kernel on an optiplex
06:59 PM Unterhausen: I should put a ssd in my backup xeon
06:59 PM Unterhausen: only single cpu, not sure how many cores
07:00 PM Tom_L: on those MB with multi cpu will they run with just one?
07:01 PM Unterhausen: yeah, the second cpu is actually on an add-in board
07:21 PM Unterhausen: I have to fix the screen timeout on this comp, it's annoyingly quick
08:01 PM CAKESLOB: ever since arcia posted his nutating head knimatics, ive been designing a mini one
08:02 PM CAKESLOB: https://forum.linuxcnc.org/show-your-stuff/49103-kinematic-model-for-a-5axis-mill-with-universal-45-nutating-head#274301
08:02 PM CAKESLOB: but holy shit its kinda hard
08:03 PM CAKESLOB: i have no idea how I will cam this
08:03 PM CAKESLOB: well, I know how I will cam it, but the post for it seems something out of my reach
08:07 PM CAKESLOB: and when I say mini nutating 5th axis
08:07 PM CAKESLOB: you can count on it being mini
08:07 PM * BIG_KEVIN420[m] uploaded an image: (2022KiB) < https://libera.ems.host/_matrix/media/v3/download/jauriarts.org/XhLXdSvXFHwYwWSmdDPbnOwv/20230628_2004051.jpg >
08:07 PM CAKESLOB: i have my mini harmonic gear steppers motors ready to go
08:13 PM CAKESLOB: looking at his instructions more.....i think the "easy" part will be making the 2 joints
08:13 PM CAKESLOB: the linuxcnc part looks 10 times harder than normal
08:24 PM liaoque: CAKESLOB:I've done 5th axes
08:27 PM skunkworks[m]: can anyone here anything?
08:27 PM skunkworks[m]: http://69.4.98.27:8000/test
08:28 PM CAKESLOB: i should start with 4th axes
08:28 PM CAKESLOB: also i am very uncomfortable clicking an ip link
08:29 PM liaoque: can play normally
08:30 PM skunkworks[m]: *hear
08:30 PM liaoque: yes
08:30 PM * skunkworks[m] uploaded an image: (892KiB) < https://libera.ems.host/_matrix/media/v3/download/jauriarts.org/lGLgeQmBQfXskZWjnWjUxoBq/PXL_20230629_012927513.jpg >
08:31 PM liaoque: what's this
08:32 PM skunkworks[m]: kinda a work in progress... The Ex wants to create a streaming radio station... I got roped into it. All linux.
08:33 PM liaoque: what‘s your job
08:33 PM skunkworks[m]: My real job is IT
08:33 PM skunkworks[m]: but - I do a little bit of everything.
08:34 PM liaoque: me too
08:35 PM liaoque: We develop CNC systems
08:35 PM CAKESLOB: I dont know why im suprised at how many people have IT/computer related jobs
08:35 PM CAKESLOB: i feel naive for assuming the majority would be cnc people
08:35 PM CAKESLOB: liaoque is both though it seems
08:36 PM skunkworks[m]: Lol - I bet most on here - their hobby is cnc...
08:36 PM liaoque: I am currently doing GUI
08:36 PM CAKESLOB: it feels so much harder when your day job is cnc and your hobby is computers
08:37 PM CAKESLOB: I guess thats why I shouldnt be suprised
08:38 PM skunkworks[m]: I have a college degree in electronics.. Got a job running a cnc laser - they found out I could do computer stuff..
08:38 PM CAKESLOB: thats pretty well rounded
08:38 PM skunkworks[m]: Dad started building a hobby machine shop...
08:39 PM liaoque: skunkworks[m]：which city do you work in
08:39 PM skunkworks[m]: Onalaska, WI
08:40 PM liaoque: oh
08:40 PM skunkworks[m]: liaoque: where are you?
08:41 PM liaoque: I'm in Shenzhen
08:41 PM liaoque: China
08:41 PM skunkworks[m]: wow - was it you asking about read-ahead yesterday?
08:41 PM liaoque: yes
08:42 PM liaoque: I already have some ideas
08:43 PM skunkworks[m]: Linuxcnc used to have only 1 segment read-ahead... Rob from tormach came along and wrote an x-segment circular arc blending trajectory planner.. It works pretty good - but no jerk control.
08:43 PM liaoque: yes
08:44 PM liaoque: Currently we are already using LINUXCNC
08:45 PM skunkworks[m]: One of the things linuxcnc has almost always had is path following tolerance.. you can specifiy how close you want the machine to follow the gcode path.. It is suprising how many controls don't have it.
08:45 PM skunkworks[m]: well - I am good at testing if you want to try some new things... 🙂
08:45 PM skunkworks[m]: (I am not a good programmer)
08:46 PM liaoque: What framework do you use for your gui
08:47 PM liaoque: Qt ？
08:47 PM skunkworks[m]: I am not a programmer. I use already build gui's like axis. I think the latest trend is Qt..
08:48 PM liaoque: i agree
08:48 PM skunkworks[m]: if you look at the channels - there is qtpyvcp
08:48 PM liaoque: I am a programmer.
08:49 PM XXCoder: skunk liao is on irc, so cannot do that. however there is qt irc side also. forgot name though
08:49 PM liaoque: I have done development based on Linuxcnc
08:49 PM XXCoder: probably #qtpyvcp
08:49 PM XXCoder: yah its correct
08:49 PM liaoque: use Qt
08:50 PM skunkworks[m]: oh - I forgot not all are on discord.
08:51 PM skunkworks[m]: liaoque: /join #qtpyvcp and look around
08:52 PM liaoque: shcom.cc
08:52 PM liaoque: api
08:53 PM CaptHindsight[m]: liaoque: how are things in Shenzhen recently? I haven't been there for a few years
08:54 PM liaoque: Very good, welcome to Shenzhen again
08:55 PM liaoque: I can receive you then
08:55 PM CaptHindsight[m]: liaoque: are you working on a CNC controller using LCNC?
08:55 PM liaoque: yes
08:55 PM CaptHindsight[m]: which processor?
08:56 PM liaoque: j1900
08:56 PM liaoque: cpu
08:56 PM CaptHindsight[m]: ah
08:56 PM CaptHindsight[m]: are you using an LPT port or something like a Mesa FPGA over Ethernet?
08:57 PM liaoque: Ethernet
08:57 PM liaoque: Ethercat
08:57 PM CaptHindsight[m]: oh ok
08:57 PM CaptHindsight[m]: Ethercat servos or steppers?
08:57 PM liaoque: servos
08:58 PM liaoque: io is designed by myself
08:58 PM CaptHindsight[m]: something similar to Leadshine?
08:59 PM CaptHindsight[m]: are you going to sell your EtherCAT IO and control?
08:59 PM CaptHindsight[m]: or is this just for your own machine?
09:00 PM liaoque: Currently using my own machine
09:01 PM liaoque: If you need, I can give you drawings and codes for free
09:01 PM CaptHindsight[m]: i am curious
09:01 PM liaoque: why
09:01 PM CaptHindsight[m]: do you have a github or similar?
09:01 PM liaoque: AX58100
09:01 PM CaptHindsight[m]: or you can post on the LCNC forums
09:02 PM liaoque: yes but not uploaded
09:02 PM CaptHindsight[m]: ah ok based on that, I see
09:02 PM CaptHindsight[m]: https://www.asix.com.tw/en/product/IndustrialEthernet/EtherCAT/AX58100
09:03 PM liaoque: I signed a non-disclosure agreement
09:03 PM skunkworks[m]: liaoque: did you post your project on the linuxcnc facebook page?
09:03 PM skunkworks[m]: I think I saw that...
09:04 PM liaoque: no
09:04 PM liaoque: on tiktok
09:05 PM liaoque: vido posted on tiktok
09:05 PM liaoque: video
09:07 PM liaoque: https://v.douyin.com/iRJYrL2/
09:07 PM liaoque: can you open it
09:09 PM liaoque: https://v.douyin.com/iR1ENsp/
09:09 PM liaoque: https://v.douyin.com/iRJjsdm/
09:11 PM CaptHindsight[m]: it plays
09:12 PM CaptHindsight[m]: ah Dental application
09:12 PM liaoque: yes
09:12 PM CaptHindsight[m]: just for you or will these be sold?
09:13 PM liaoque: sold
09:13 PM CaptHindsight[m]: similar dental 5-axis mills here are ~$30K
09:13 PM liaoque: oh
09:14 PM CaptHindsight[m]: https://www.pentamachine.com/machines is less
09:15 PM CaptHindsight[m]: but don't have the tool changers or flood cooling
09:15 PM liaoque: I am in charge of R&D and not in trade
09:15 PM liaoque: oh
09:16 PM CaptHindsight[m]: https://usdentaldepot.com/p53-smart-5-axis-milling-machine-up3d-p53
09:16 PM liaoque: desktop
09:16 PM CaptHindsight[m]: ~$18K USD
09:17 PM liaoque: Our equipment is 1.7 meters
09:19 PM liaoque: 4th axis same as this
09:20 PM CaptHindsight[m]: what is the work volume? ~10cm x 10 x 10?
09:21 PM liaoque: I will measure it
09:23 PM liaoque: about 1.7X0.8x0.8 m
09:23 PM Unterhausen: kernel still building
09:24 PM CaptHindsight[m]: liaoque: welcome to the channel, we rarely get anyone here from China
09:25 PM liaoque: thanks
09:25 PM liaoque: There are a lot of Chinese, they just rarely speak
09:26 PM CaptHindsight[m]: liaoque: how did you decide on LCNC vs the usually windows GRBL controls?
09:26 PM CaptHindsight[m]: usually/usual
09:27 PM liaoque: Many companies in China are using linuxcnc
09:27 PM CaptHindsight[m]: liaoque: oh is LCNC starting to get some use in China now?
09:27 PM CaptHindsight[m]: I have been looking
09:27 PM liaoque: or heavily modified
09:28 PM CaptHindsight[m]: it wasn't the case 5-10 years ago
09:28 PM XXCoder: I guess its been replacing ancient mach3
09:28 PM CaptHindsight[m]: most Chinese vendors are still advertising mach3 or GRBL type controls
09:28 PM liaoque: Several companies were using it back in EMC2
09:29 PM CaptHindsight[m]: well they kept that secret :)
09:30 PM liaoque: I know there are seven or eight companies using linuxcnc
09:30 PM liaoque: CaptHindsight[m]：yes
09:30 PM CaptHindsight[m]: liaoque: are there any suppliers there of Chinese made ballscrew positioners that have the quality you might find in Taiwan or Germany?
09:31 PM liaoque: At present, the quality of products in Taiwan is very good
09:31 PM CaptHindsight[m]: I see mostly low quality parts on ali and similar
09:31 PM liaoque: hiwin
09:32 PM liaoque: tbi
09:33 PM CaptHindsight[m]: how about any made in mainland China?
09:33 PM CaptHindsight[m]: https://www.automationtechnologiesinc.com/products-page/cnc-parts/z-axis-slider-7-travel is what we see in the USA from China
09:34 PM liaoque: At present, China's machine tools are developing rapidly
09:35 PM CaptHindsight[m]: I know they have them somewhere since you make things that launch into space and stay there :)
09:36 PM CaptHindsight[m]: if you have any Chinese brands, websites, links, etc I'd love to see them
09:37 PM liaoque: However, compared with Switzerland and Germany, it is still a stage behind.
09:38 PM liaoque: https://www.jingdiao.com/
09:38 PM liaoque: This company is the best I have seen at the show
09:43 PM -!- #linuxcnc mode set to +v by ChanServ
09:59 PM roycroft: so $woodcraftrivertableguy was there, and talked to me about live/natural edges
09:59 PM roycroft: he was trying to push me into spending several hundred dollars on edge treatment devices in several grits
10:00 PM roycroft: i ended up spending $50 on some more sanding sponges, in grits i did not have
10:00 PM roycroft: but starting with p60 it's going to take me about a week and a half to get the edge rough sanded
10:01 PM roycroft: so i am going to look for some other abrasive that can be mounted in a power tool to get the first bit done
10:01 PM roycroft: after initial sanding, i think the other grits should take about 10 minutes each
10:01 PM liaoque: (y)
10:02 PM * roycroft apprciates the affirmation
10:17 PM Unterhausen: I'm pretty sure I saw large Chinese machining centers at IMTS, don't think they were Taiwanese
10:18 PM Unterhausen: amusingly didn't want you to take pictures
10:21 PM liaoque: At present, many enterprises in Chinese Mainland will stick Taiwan's brand