#linuxcnc Logs

Apr 05 2021

#linuxcnc Calendar

12:07 AM veegee: Whatever. I'm an armoured cable fan for life, especially for long sections
12:15 AM veegee: Conduit and RW90/T90 are expensive, but look nice
12:15 AM veegee: I guess it makes sense for smaller sections
12:16 AM drdoc_ is now known as drdoc
12:16 AM veegee: But yeah T90 has more options for stranded at thicker sizes. They don't seem to carry stranded RW90 in anything thicker than 14 AWG
12:17 AM drdoc: nylon is crazy hygroscopic unless it's coated
12:17 AM veegee: yeah that's what it says on the spool of nylon for my 3D printer haha
12:18 AM veegee: The insulation might also be higher leakage than XLPE, especially at 600VAC
12:18 AM drdoc: I have a 5lb spool of weedwhacker line that's great for prototype printing, and cheap
12:19 AM drdoc: but if I print with it as shipped, it's so wet the printed part looks fuzzy
12:19 AM drdoc: snap-crackle-pop
12:19 AM veegee: I like 3D printing as a concept, but it's just so fiddly
12:19 AM drdoc: it really is
12:20 AM XXCoder: depends on precision needs but yeah
12:20 AM veegee: These days I just machine it from wood if I have to
12:20 AM veegee: WAAAAAAYYY cheaper
12:20 AM veegee: and faster
12:21 AM XXCoder: sigh I need a shop for that
12:21 AM veegee: don't you work as a machinist?
12:21 AM XXCoder: yeah but they arent wood shop[ ;)
12:29 AM XXCoder: i want my own to work with wood, not metal
12:29 AM veegee: They won't let you use the machine for food after work?
12:29 AM veegee: for wood*
12:29 AM veegee: not food
12:29 AM XXCoder: i wouldnt do it
12:29 AM XXCoder: machines is not compitable to wood
12:29 AM XXCoder: when it was at peak, nearly all machines are busy or has setup
12:29 AM veegee: How can it not be? I practice with wood before I go to metal
12:29 AM veegee: Machine doesn't care at all
12:29 AM XXCoder: i suppose, but im respible for any wear and tear on machines, and i dont want to
12:29 AM veegee: Also easier to keep clean if you mount a vacuum cleaner hose next to the cutter
12:29 AM XXCoder: for nearlt all machines, that isnt really possible :)
01:56 AM Deejay: moin
01:57 AM veek: man buying copper wire is a total ripoff.. there's absolutely no connection between /kg copper and the pathetic amount of grams they sell us
03:19 AM veek: 7 strand 36AWG wire - the cost of copper is 0.236$/30m Someone please tell me I'm wrong.. ???
03:19 AM veek: 3.41gm/30m strand
04:21 AM Tom_L: morning
05:43 AM HexaCube: hey folks, yet again I suppose this is the best place to ask: How risky is it to buy a used surface plate? Do those wear out to signficiant amounts, assuming I don't do any high precision stuff anyways, where a few ┬Ám make a difference?
06:33 AM JT-Cave: morning
06:41 AM Loetmichel: *sigh*... drove 10 min to the next fuel station for cigs... forgot the wallet. Sometimes i feel like i am getting old. At least i still remember to put on pants before leaving the house. :P
06:45 AM miss0r: HexaCube: Then you should be fine
06:45 AM miss0r: Loetmichel: On behalf of your local community, I thank you :D
06:46 AM Loetmichel: for not forgetting pants?
06:46 AM Loetmichel: :)
06:47 AM miss0r: yeah :]
06:47 AM miss0r: We just had a 30 minut snowstorm roll in
06:48 AM miss0r: 17m/s wind and ALOT of snow in the air. yesterday we had 15degrees c and sunny weather. lol. now everything is covered with a few centimeters of snow
06:52 AM sensille: Loetmichel: google pay on the phone is quite convenient
06:53 AM Loetmichel: sensille: dont really know how many shops in germany accept that though
06:53 AM sensille: all that accepts wireless cards
06:53 AM sensille: so nearly all
06:56 AM Loetmichel: oh? interesting. I thought they't still need a seperate reader for that. doubt the app would still run on android 5.0 though.
06:57 AM sensille: that might be a problem. you also need NFC in your phone
06:57 AM Loetmichel: note3, it has NFC (never used it before though)
06:58 AM sensille: it's even much faster than with rfid credit cards, payment takes <2s
06:59 AM Loetmichel: i do that with my debit card. but recently it stutters.. should not use the back pocket for the wallet. thats the third card in 2 years that i destroy that way ;)
07:00 AM Loetmichel: <- fat ass :)
07:01 AM sensille: i guess because the phone is self powered it can complete the calculations much faster than a passively powered card
09:00 AM enleth: sensille: it's because the NFC radio in the phone is active and self-powered, so it starts the exchange with the terminal earlier and it's more reliable
09:01 AM enleth: crypto processing time in NFC cards is negligible, but they appear slow when used witg crappier terminals
09:02 AM enleth: BTW, the cards aren't RFID, that's a completely separate technology
09:03 AM enleth: (source: worked at MasterCard, did card personalization and backend systems for contactless and phone payments)
09:03 AM sensille: interesting
09:06 AM enleth: basically, the power-on distance for a passive card is less than the actual maximum communication distance for NFC, so the phone starts talking to the terminal earlier, as you're still moving it towards the antenna
09:10 AM enleth: sensille: for crypto computation itself, the cards have dedicated RSA hardware, so they're reasonably quick to sign the transaction even though the main CPU is usually something like an 8051 derivative clocked at no more than a few MHz
09:10 AM sensille: sounds like the chips i've seen 20 years ago
09:10 AM enleth: pretty much
09:11 AM enleth: more like 30, to be honest
09:12 AM enleth: NXP uses a weirdo custom 8051 with a MMU tacked on to get hardware process memory isolation
09:13 AM enleth: and hardware acceleration for Java, as that's what the payment app is written in
09:14 AM sensille: ouch
09:14 AM enleth: the JVM that runs on it is even weirder, no garbage collector, no dynamic allocation, no String at all
09:15 AM enleth: this is pretty much the standard for all payment cards and SIM cards nowadays, they all run Java
09:17 AM enleth: (side note: the only difference between a payment card and SIM card is the shape plastic is cut into around the chip, and the Java apps loaded onto it, it's otherwiae the same hardware from the same vendors, that's why first phone-based payment systems used the SIM)
10:57 AM JT-Shop: UPS driver just told me they are working more hours now than at Xmas
11:05 AM bjorkintosh: Despite Amazon's incursion. that's good.
11:59 AM veegee: This new push for "sustainable, walkable, high density" cities is such bullshit
11:59 AM veegee: who wants to walk in the winter when it's cold and snowing?
11:59 AM veegee: or walk while carrying a load of groceries
12:00 PM veegee: People with things to do don't walk
12:00 PM veegee: And condos/apartments are disgusting. Filled with filthy humans packed as tight as possible. Incredibly suffocating
12:02 PM veegee: People pushing for banning cars and stuff like that clearly live in a place where it's warm and sunny all day every day in the year. The rest of the world doesn't like that. We invented houses and cars for a reason.
12:02 PM veegee: And public transportation is the fucking worst. Slower than a car even in rush hour, all the while being packed like cattle around filthy people
12:10 PM roycroft: people need to stop all the excessive breeding
12:10 PM veegee: roycroft EXACTLY!!
12:10 PM veegee: I was reading about addling goose eggs for some reason because I saw a goose incubating her eggs in the parking lot
12:10 PM veegee: I wish I could do that to humans
12:10 PM veegee: For goose eggs, it's as easy as dunking them in corn oil to clog the pores in the shell so oxygen can't get in
12:10 PM veegee: I guess that'll work for humans too but they'll put up a fight :(
12:10 PM roycroft: fun morning so far - i had a birch tree come down late last summer that i hadn't dealt with yet, so i got out the chainsaw, cut it up, and hauled it away
12:10 PM roycroft: now i can cut the grass in that part of the property
12:11 PM roycroft: i'll never do away with all of it, but most if it will go
12:22 PM veegee: I don't mind the traffic levels during lockdown
12:22 PM veegee: Keeps all the idiots at home and hey look at that, turns out non essential activities are actually non essential and frees up the streets and highways for the rest of us to get real work done
12:23 PM veegee: god damn I fucking hate people
12:38 PM * Bleepshop notices that veegee reminds him of someone else...
12:39 PM Bleepshop: veegee: What are your thoughts on... Canada ?
12:39 PM veegee: lol! In what sense?
12:39 PM NoGodDamnIdea: hey guys
12:40 PM veegee: Way better than the USA for so many reasons but that's a very general sense
12:41 PM Bleepshop: veegee: NM. The lack of a screamed response tells me you aren't him. LOL
12:41 PM veegee: Bleepshop who are you referring to?
12:42 PM veegee: NoGodDamnIdea herro
12:42 PM Bleepshop: veegee: flyback... LOL
12:44 PM veegee: NoGodDamnIdea oh
12:44 PM veegee: whoops
12:44 PM veegee: sorry
12:44 PM NoGodDamnIdea: sorry for saying hi?
12:44 PM NoGodDamnIdea: :<
12:47 PM miss0r: :]
01:40 PM * roycroft suspects veegee is really ferengi
01:40 PM * roycroft can hear him express his disdain for hue-mans
01:54 PM drdoc: zowie
01:55 PM drdoc: ordered chinese bakelite 28 March, it's gonna deliver tomorrow
02:35 PM JT-Shop: wow this greenlee 4 1/8" hole saw has a bit too much hook on the teeth but it cuts through wood fast after you get past the chattering start
02:52 PM JT-Shop: UPS has driven past my house 3 time today with my laptop on the truck...
02:52 PM drdoc: sounds infuriating
02:56 PM drdoc: you know what's fun? Straightening pins after you drop a PC/104 module
03:01 PM JT-Shop: I've heard of PC104 but have no clue what one looks like
03:02 PM drdoc: the entire ISA bus is broken out as 1/2" pins
03:02 PM drdoc: 4 rows
03:04 PM drdoc: https://www.curtisswrightds.com/content/documents/PRV-1059-21640.jpg
03:15 PM JT-Shop: ouch that's a lot of pins
03:19 PM drdoc: yup, and they bend easy
03:48 PM roycroft: so i have the test results from my jointer, and while i did not get as much sound reduction as i'd like, i'm fairly pleased anyway
03:48 PM roycroft: unfortunately i did not record the sound, because it sounded a lot different (and less annoying) after the dynamat
03:49 PM roycroft: i first meausred the ambient sound level at 1m from the jointer - 34.1dB(A)
03:49 PM roycroft: then the running jointer on the built-in mobile base - 73.8dB(A)
03:49 PM roycroft: then i put it on the new mobile base i built
03:50 PM roycroft: ambient: 35.3dB(A), running: 72.4dB(A)
03:50 PM roycroft: then i added the dynamat
03:50 PM JT-Shop: hmm the Honda dealer just informed me it might take 6 months to locate the Ridgeline I want
03:50 PM roycroft: ambient: 35.9dB(A), running: 71.2dB(A)
03:51 PM roycroft: so i brought the sound level down by about 50% from the original built-in mobile base to the new mobile base + dynamat
03:52 PM roycroft: while the ambient sound level increased by about 50% (1.8dB(A)) during the test period
03:52 PM roycroft: it's too bad i do not have a sound isolation booth
03:53 PM roycroft: i was hoping for more of sound decrease with the dynamat, but it's still pretty nice, because before the dynamat there was an annoying low-pitched rumble that all but went away after i installed it
03:53 PM roycroft: i actually expected it to dampen the higher frequencies better than the lower ones, but perhaps that is because i'm not an acoustic engineer
03:54 PM roycroft: i did expect the new mobile base to make it more quiet, and i was correct there
03:54 PM roycroft: because i raised it 4" off the floor
03:55 PM roycroft: i paid ~$30 for the sound dampening material (not dynamat brand - i forget the brand offhand), and i got 9 sheets of it
03:56 PM roycroft: i used 2 sheets on the jointer, so it cost me ~$6.75 to apply it
03:57 PM roycroft: noico is the stuff - their 8mm butyl rubber dampening material
03:57 PM roycroft: er, 80mil
03:57 PM roycroft: not 8mm
03:59 PM * roycroft calls it a definite win, and would definitely do it again
03:59 PM roycroft: i may put some on my thicknesser when i install the new gasket and o-rings
04:19 PM JT-Shop: 7/16" 4x8 OSB is down to $35.60 a sheet
04:31 PM roycroft: i haven't priced sheet goods lately, but dimensional lumber has gone way way up over the past year
04:56 PM Tom_L: JT-Shop, pc104: http://tom-itx.no-ip.biz:81/~webpage/SBC/server/DSC_0003.JPG
04:57 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/SBC/server/DSC_0007.JPG
04:59 PM Tom_L: i got 4-5 you can have if you come get them
07:39 PM Bleepshop: Tom_L: What kind of PC104 board am I drooling over pictures of ? LOL
07:52 PM Tom_L: it's old
09:15 PM -!- #linuxcnc mode set to +v by ChanServ
09:26 PM -!- #linuxcnc mode set to +v by ChanServ
09:34 PM -!- #linuxcnc mode set to +v by ChanServ
10:01 PM Bleepshop: Tom_L: It's new to me. 90% of what I end up with is either old and obsolete, broken or both so I'm all for checking out odd boards. LOL
10:02 PM * Bleepshop hauled 35lbs of greenboard to the scrapyard this afternoon after heatgunning off some connectors and other parts.
10:04 PM Tom_L: it was part of a vehicle tracking system
10:04 PM Tom_L: gps etc on board
10:04 PM Tom_L: in the case anyway
10:05 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/SBC/inside_control.jpg
10:10 PM flyback: eeblog is *canucked*
10:10 PM * flyback drags rue_mohrs corpse against it
10:10 PM flyback: As of approimately 2021-04-04 21:13:00 UTC there was a major outage at the datacenter in Odgen Utah where the EEVBlog servers are hosted. This outage was caused by a fire as a result of performing regular load testing of the emergency generators.
10:10 PM flyback: Unfortuantly due to the nature of the failure it may be some time before the EEVBlog website and forums are restored to normal operation. Thankfully we maintain several off-site backups of the entire EEVBlog infrastructure, as a result there is no need to worry about any loss of data.
10:13 PM Tom_L: uh huh
10:17 PM flyback: https://free-pdk.github.io/
10:18 PM * flyback rubs veegee against eeblog forum servers
10:18 PM flyback: *CANUCKED*
11:19 PM SpiritHorse: hot