#linuxcnc Logs

Apr 24 2023

12:16 AM Deejay: moin
12:06 AM CaptHindsight[m]: G4 Severe geomag strom
12:17 AM CaptHindsight[m]: https://www.swpc.noaa.gov/
12:17 AM CaptHindsight[m]: too hazy here to see auroras
12:21 AM JoseIgnacioRomer: too many clouds and light pollution here :(
01:39 AM randy: morning
04:28 AM Tom_L: morning
05:30 AM JT-Cave: morning
06:11 AM travis_farmer[m]: Morning ☕️ (i got up at 1am, but got tired and went back to bed...)
06:21 AM JT-Cave: that doesen't count then
06:22 AM travis_farmer[m]: well i was up enough to make coffee and watch YouTube until 3:30am
06:33 AM travis_farmer[m]: 42F with a high of 43F, and rain all day
07:56 AM * JT-Cave starts his chicken day
08:45 AM * travis_farmer[m] starts his nothing day
09:23 AM JT-Shop: Lcvette[m], current TPW is 5/15
09:35 AM roycroft: it looks like we're done with rain until the 3rd of next month
09:35 AM roycroft: and after day, warmth and sunshine every day for at least a week
09:35 AM JT-Shop: it's about time
09:38 AM Scopeuk: 6 out of hte next 10 days here are forcast rain
09:43 AM hn9861[m]: What acceleration settings are used during homing?
09:45 AM Lcvette[m]: <JT-Shop> "Lcvette, current TPW is 5/15" <- Man that's right around the corner.. that's exciting!!!!
09:48 AM JT-Shop: it's subject to change... but yep that's good news
09:51 AM * JT-Shop attempts to clean his desk off...
10:05 AM roycroft: rpi4s exist again
10:05 AM roycroft: sb-components.co.uk have a limited supply for sale
10:07 AM JT-Shop: what kind of price?
10:08 AM roycroft: i haven't checked
10:08 AM roycroft: i don't need any at the moment
10:08 AM roycroft: but i know they've been impossible to get for some time now
02:13 PM -!- #linuxcnc mode set to +v by ChanServ
02:47 PM CaptHindsight[m]: andypugh_: have you left the colonies yet?
02:49 PM CaptHindsight[m]: I checked the Zoom feed from the fest this past weekend, no sound
03:18 PM markusbec: hi
03:19 PM markusbec: i have a problem with my setup of a 7i92 with a 7i77 and a 7i74
03:20 PM markusbec: i have connected a 7i71 the 7i77 but it is not recognize
03:20 PM markusbec: the 7i74 is for stmbls and a 7i70 but i am waiting for it
03:21 PM markusbec: https://forum.linuxcnc.org/27-driver-boards/48924-problem-with-setup-of-ah-7i92-with-7i77-7i71-7-70-and-7i74-with-missing-smarts
03:22 PM markusbec: any idea pcw--home
03:37 PM JT-Shop: do you have the sserial port enabled?
03:39 PM markusbec: with this loadrt hm2_eth board_ip="10.10.10.10" config="num_encoders=6 num_pwmgens=0 num_stepgens=0 sserial_port_0=000 sserial_port_1=00000" only the internel 7i77 ports work
03:40 PM markusbec: with this loadrt hm2_eth board_ip="10.10.10.10" config="num_encoders=6 num_pwmgens=0 num_stepgens=0 sserial_port_0=000" the internal and the ports at the 7i74 work
03:40 PM JT-Shop: hmm that should work I think
03:41 PM markusbec: for my understanding sserial_port_0=000 sserial_port_1=0000 should enabel ss0.0 ss0.1 ss0.2 and ss1.0 ss1.1 ss1.2 ss1.3 ss1.4 and ss1.5 but it does not
03:41 PM markusbec: SSerial 0 TXData2 is never enabled
03:42 PM markusbec: rx #linuxcnc txen
04:15 PM Tom_L: i never quite understood the numbers on the sserial config
04:15 PM Tom_L: sserial_port_0=20xxxxxx was what i had on mine
04:17 PM JT-Shop: me neither
04:17 PM JT-Shop: https://forum.linuxcnc.org/27-driver-boards/47858-7i96s-with-7i76-sserial-device?start=10#269487
04:53 PM travis_farmer[m]: as i understand the numbers for SSERIAL, it is the software mode for the card on each port.
04:53 PM JT-Shop: http://linuxcnc.org/docs/html/man/man9/sserial.9.html
04:53 PM JT-Shop: depends on the card
04:53 PM travis_farmer[m]: exactly
04:54 PM JT-Shop: seems I've made the Liberty Bowl... found a crack in the rim
04:55 PM travis_farmer[m]: oh no...
05:03 PM Tom_L: doc says i may make it a bit longer
05:03 PM Tom_L: i said.. i knew that.. you still gonna charge for things i knew?
05:05 PM JT-Shop: what are you talking about?
05:05 PM Tom_L: just ramblin really
05:05 PM JT-Shop: lol
05:05 PM Tom_L: went in for my allergies...
05:08 PM JT-Shop: up to EP122
05:09 PM Tom_L: what's that?
05:09 PM JT-Shop: Leo
05:09 PM Tom_L: oh..
05:09 PM Tom_L: you got too many things with numbers lately
05:09 PM JT-Shop: lol
05:10 PM Tom_L: wonder how things are going at tormach
05:11 PM JT-Shop: I assume everyone has gone home
05:12 PM Tom_L: yeah, i didn't know how long it was supposed to last
05:13 PM CaptHindsight[m]: just Saturday and Sunday I believe
05:13 PM Tom_L: oh
05:14 PM CaptHindsight[m]: the Zoom feed was down by Sunday evening, I forget when
05:14 PM CaptHindsight[m]: this was for the open LCNC meetup
05:14 PM CaptHindsight[m]: I think that Tormach has the LCNC devs they hire in for the week to discuss business
05:15 PM CaptHindsight[m]: any overlap was on the weekend
05:19 PM CaptHindsight[m]: JT-Shop: fill the crack with epoxy but don't tell roycroft
05:19 PM JT-Shop: lol
05:20 PM roycroft: i'm fine with epoxy repairs
05:20 PM roycroft: as i've discussed many times
05:20 PM roycroft: it's when epoxy becomes the dominant design element that things have gotten out of hand
05:21 PM JT-Shop: the separation is very small... dunno how I might get some glue in there
05:21 PM roycroft: try some really thin ca glue
05:21 PM roycroft: that stuff pretty much just soaks into the wood
05:22 PM roycroft: but ca glue has no real strength
05:22 PM roycroft: if you need strength then use epoxy
05:22 PM JT-Shop: I was thinking of using a syringe to force some tightbond 3 into the separation then pulling it tight
05:23 PM roycroft: maybe that will work
05:23 PM XXCoder: you probably want to make custom wood clamp
05:23 PM XXCoder: use plastic brown tape to line it so it dont stick too much
05:27 PM roycroft: i'd mix up some epoxy with the slowest hardener i could get, heat it in a hide glue pot so it's nice and warm, then pour it in the void or inject it with a syringe
05:28 PM JT-Shop: nearest hide glue pot I know of is in Eugene...
05:28 PM roycroft: the slow hardener so that it doesn't kick off while it's still heating
05:28 PM roycroft: i think tom_l used to use hide glue
05:28 PM roycroft: he probably has a glue pot around
05:28 PM roycroft: but you could use a crock pot if you want
05:29 PM JT-Shop: Wichita would be much closer
05:30 PM roycroft: the heating method is unimportant
05:30 PM roycroft: although i'd recommend not using open flame
05:30 PM roycroft: but getting it warm to thin it out a bit is the important part
05:31 PM roycroft: i would never add a solvent or any other thinner to epoxy
05:31 PM CaptHindsight[m]: use an epoxy thinner
05:31 PM roycroft: i know some folks say it's ok to thin with acetone, but they are wrong
05:32 PM CaptHindsight[m]: typical non-reactive solvents will just get trapped or form bubbles at the surface while curing
05:32 PM CloudEvil: If the acetone can evaporate/migrate fully from the solvent, then great
05:32 PM CloudEvil: fully from the glue, before setting, rather
05:32 PM roycroft: but some of it will get trapped in the epoxy
05:33 PM CloudEvil: It's a decent way to do thin films
05:33 PM CloudEvil: (which are then pressed together)
05:33 PM roycroft: especially when filling crevices
05:33 PM CaptHindsight[m]: we use reactive solvents to thin epoxies
05:34 PM CaptHindsight[m]: they become part of the polymerization
05:34 PM roycroft: that would be fine
05:34 PM CloudEvil: If you're OK with the epoxy being a fair bit weaker, that's also another case
05:34 PM CaptHindsight[m]: but I don't know where a layman can get them, let me check
05:34 PM Tom_L: i've probably tossed the animal glue by now
05:34 PM roycroft: acetone is not a reactive solvent in this context
05:35 PM Tom_L: i boiled it in a pot of water
05:35 PM roycroft: but you've hit on the crux of the misunderstanding, i think
05:35 PM Tom_L: and the water kept it pliable a while longer
05:35 PM roycroft: most people, i would guess, think that epoxy hardener is a catalyst
05:35 PM roycroft: and that the resin will react on its own
05:36 PM roycroft: i assume this is the case because so many people think that the proportion of resin to hardnener is not important, and that they can adjust the cure rate by adjusting the ratio of resin to hardener
05:37 PM roycroft: those would be the same people who think thinning with acetone is fine
05:39 PM Tom_L: or sniffing it
05:41 PM CaptHindsight[m]: another option is water based epoxy, they are low viscosity
05:42 PM CaptHindsight[m]: but i only know how to get the raw materials in bulk, not small cans
05:44 PM roycroft: common epoxies like the offerings from west systems or totalboat, with a slow hardener, and heated to 60c before pouring should do fine
05:46 PM CloudEvil: Remembering that the cure time will be some 16+ times faster at hiogh temps
05:48 PM CaptHindsight[m]: or use a 2k urethane, it will also hold up much better in sunlight
05:49 PM roycroft: that's why i said to use the slowest cure hardener possible
05:49 PM roycroft: this is a simple repair job - mix it up, heat it up, squirt it in the crack
05:50 PM CaptHindsight[m]: just be cautious around isocyanates
05:50 PM roycroft: it shouldn't need a pot life of more than a couple minutes once it's heated up
05:50 PM CaptHindsight[m]: and don't tell roycroft :)
05:50 PM roycroft: who suggested it :)
06:05 PM Tom_L: mmm house down the street just burned down
06:08 PM JT-Shop: that ain't good
06:08 PM JT-Shop: actually I think the only glue that will get into that crack is thin ca
06:09 PM JT-Shop: I do have a couple of spots that need some epoxy... so close
06:10 PM CloudEvil: Also, depending on what it is, just drilling a 2mm hole into the crack and using a syringe with tape over the crack can work real well
06:14 PM JT-Shop: mostly wenge
06:14 PM * JT-Shop calls it a day
06:16 PM * Tom_L finished the yard just before the rain
06:26 PM CaptHindsight[m]: Tom_L: still smoking burned down?
06:30 PM Tom_L: it's out but far enough they cut holes in the roof
06:35 PM -!- #linuxcnc mode set to +v by ChanServ
07:34 PM -!- #linuxcnc mode set to +v by ChanServ