#linuxcnc Logs
Jul 12 2023
#linuxcnc Calendar
12:31 AM Deejay: moin
01:14 AM -!- #linuxcnc mode set to +v by ChanServ
01:24 AM Centurion_Dan1 is now known as Centurion_Dan
02:46 AM -!- #linuxcnc mode set to +v by ChanServ
02:59 AM TurBoss: moning
03:09 AM Centurion_Dan1 is now known as Centurion_Dan
03:32 AM mrec: https://snipboard.io/mnHvZo.jpg
03:32 AM mrec: what a crap they're selling in TW...
03:32 AM mrec: AL .. looks like AI .. aluminum alloy..
03:54 AM travis_farmer[m4: Morning ☕️
04:31 AM Tom_L: morning
05:40 AM JT-Cave: morning
05:49 AM JT-Cave: rooster just crowed
06:10 AM -!- #linuxcnc mode set to +v by ChanServ
06:15 AM travis_farmer[m4: 64F high of 84F @ 100%rh
06:29 AM JT-Cave: same here but hotter
06:31 AM Tom_itx: 72 - 97
06:31 AM JT-Cave: ouch
06:31 AM travis_farmer[m4: :-(
06:32 AM Tom_itx is now known as Tom_L
06:32 AM XXCoder: week is going to be "fun"
06:32 AM JT-Cave: we have some 100+ heat indexes the next few days but the temps are in the low 90's
06:32 AM XXCoder: 80s f
06:32 AM XXCoder: thankfully low rh as usual. almost never gets high rh here outside rains
06:33 AM XXCoder: sometimes not even then
06:36 AM travis_farmer[m4: Y'all stay frosty! don't do anything dumb in the heat. i have some in-house projects to work on, so i won't be working in my furnace (shop). will wait for the coming rainy days.
07:37 AM JT-Cave: looked at the rear tire on the BlueWing yesterday and it's slick and the front is starting to cup...
08:02 AM * JT-Cave starts his chicken day
08:10 AM Alden[m]: The monitor o have is saying the input signal is out of range change settings to 1600 x 900 60Hz
08:10 AM Alden[m]: Though my display settings will not open
08:10 AM Alden[m]: Can I change that from terminal?
08:17 AM Alden[m]: Nvm
08:18 AM Alden[m]: xrandr -s 1600x900 -r 60
10:52 AM JT-Cave: Alden[m], is that only temporary?
11:01 AM Unterhausen: is the 7i76 due for a replacement any time soon?
11:06 AM pcw--home: 7I76s are available, Did you mean 7I76E?
11:07 AM Unterhaus_: yes, the 7i76E
11:09 AM Unterhaus_ is now known as Unterhausen
11:10 AM pcw--home: Working on it now (7I76EU), it will still be a while, I would suggest 7I96S in the interim
11:14 AM pcw--home: or 7I92TM and 7I76
11:16 AM Unterhausen: the person needs more I/O. I suggested a 7i96S plus some smart serial daughter cards
11:18 AM JT-Cave: pcw--home, how's the 7I95T coming along?
11:22 AM pcw--home: hoping we get them this week but looking more like next week
11:28 AM JT-Cave: thanks
11:28 AM JT-Cave: this week is about done for...
11:28 AM roycroft: mine is just beginning, since monday was part of my vacation
11:28 AM roycroft: if i'm lucky i'll be caught up by friday
11:31 AM Tom_L: ok yard done before it warms up
11:31 AM Tom_L: currently 87F
11:31 AM Tom_L: and about the same humidity
11:33 AM JT-Cave: it's not that hot or humid but muggy outside
11:33 AM JT-Cave: ah dewpoint is 70°F
11:33 AM Tom_L: once i stop dripping, i'll shower
11:33 AM JT-Cave: shake like a dog
11:34 AM Tom_L: i'm not that motivated
11:34 AM JT-Cave: lol
11:34 AM JT-Cave: I "think" I have the sd card sorted out finally using gparted
11:34 AM Tom_L: ok, shower, lunch, nap
11:34 AM Tom_L: ahh
11:34 AM Tom_L: why gparted?
11:35 AM JT-Cave: couldn't get anything to format it
11:35 AM Tom_L: you need to split it up?
11:35 AM JT-Cave: once I deleted the debian os
11:35 AM Tom_L: windows should
11:35 AM Tom_L: but it would be NTFS unless you tell it otherwise
11:35 AM JT-Cave: windblows said unknown size
11:36 AM JT-Cave: I used gnome disk to wipe debian off and got stuck after that
11:36 AM Tom_L: didn't you recently reinstall windows?
11:37 AM solarwind: Hmmm. If I weld 6061-T6 with ER4943 and age harden the whole part, would that mean the non-heat-affected 6061-T6 gets over aged?
11:37 AM JT-Cave: we'll see in a bit if the C8 can use it or not, seems neither the C8 or the Ridgeline can use a 64GB sd card for music
11:37 AM Tom_L: after swapping MB around i had to re'register it and found the easiest way to do it nowdays is by phone
11:37 AM JT-Cave: wow
11:38 AM Tom_L: you get a code off the pc, they send you a link and you enter the code and verify what they send back
11:40 AM Tom_L: the code on the disk doesn't seem to work now. maybe on a fresh install it might
11:40 AM JT-Cave: for windblows?
11:40 AM Tom_L: yes
11:40 AM Tom_L: 7
11:43 AM Tom_L: solarwind, anneal it all and then temper it
11:43 AM Tom_L: T6 isn't age hardened anyway. T651 is
11:44 AM solarwind: Tom_L yeah that's what I wanted to avoid, it's a thing of last resort. ER4943 is an excellent filler that has the properties of ER4043 but has 50% more yield strength. And you can age it to get another 2x yield strength.
11:44 AM solarwind: Tom_L Isn't T6 the artificial aging grade?
11:44 AM Tom_L: i'm not sure honestly but i know 651 _is_
11:45 AM Tom_L: i know it's the better of the two
11:45 AM solarwind: I'm building an air manifold so aiming for a T7x temper to greatly improve ductility and stress corrosion cracking resistance
11:45 AM solarwind: T6 is definitely age hardened
11:46 AM solarwind: aka tempered
11:46 AM Tom_L: The difference between T6 and T651 of the 6061 aluminum plate is that the internal stress of T6 will be relatively large, it is easy to deform in processing. -T6511 is a subset of the -T6 temper with eliminated internal stress, so it's more suitable for processing.
11:47 AM solarwind: https://www.cnclathing.com/guide/difference-between-t6-and-t651-aluminum-tempers-designation-system-explain-cnclathing
11:47 AM Tom_L: like i said, overall you're better off anealing it and then temper
11:47 AM solarwind: yeah
11:48 AM solarwind: well anneal -> solution heat treat -> quench -> temper
11:48 AM solarwind: can maybe skip the anneal part entirely
11:49 AM Tom_L: stick it in a kiln for a while
11:49 AM Tom_L: then temper it
11:49 AM solarwind: doesn't work like that
11:50 AM solarwind: you have to bring it fully up to the "solution heat treat" temperature to fully dissolve the magnesium
11:50 AM Tom_L: use rivets :)
11:50 AM solarwind: then water quench it
11:50 AM Tom_L: instead of welding
11:50 AM Tom_L: that's what airframes do
11:50 AM solarwind: then you can artificially age harden aka temper it
11:50 AM solarwind: I know, but I really love welding
11:51 AM * JT-Cave takes a nap
11:51 AM solarwind: also it's a pneumatic manifold (small pressure vessel) intended for ~15 bar working pressure
11:52 AM solarwind: obviously going to hydrostatic pressure test it to 10x working pressure
11:52 AM Tom_L: surely not making a sub :)
11:52 AM solarwind: mild steel is so much simpler. Its base strength in the as-welded condition has very high yield strength
11:54 AM solarwind: if I were building a submarine for 500 bar working pressure, I would double the plate thickness of the deep sea challenger
11:54 AM solarwind: like... carbon fibre is an incredibly stupid choice for compressive loads
11:55 AM solarwind: that guy is such an idiot and a criminal
11:55 AM solarwind: don't get me started
11:55 AM roycroft: s/is/was/
12:05 PM CaptHindsight[m]: solarwind: hey that dead CEO didn't get rich by living and dealing with reality in any rational way, he just loved collecting money and power, sheeesh
12:20 PM Tom_L: mebbe you could 3d print one
12:22 PM pcw--home: Carbon fiber in compression is kind of a rope handled shovel
12:22 PM travis_farmer[m4: LMAO
01:04 PM CaptHindsight[m]: devil.shadow: post your hal and ini on a pastebin
01:05 PM devilshadow[m]: Hi I'm new here I'm trying to setup LinuxCNC on an MPCNC, I succeeded in XYZ mode with one X limit switch and one Y limit switch (I don't want Z). But I'm trying to step up to go to XXYYZ control with X1 X2 Y1 Y2 Zmotor control and 4 limit switches so my machine can self square itself but I can't do it, if you want I have my .ini and .hal files. Those 2 files I have in XYZ mode working, but in XXYYZ mode not working
01:05 PM CaptHindsight[m]: CaptHindsight: https://paste.debian.net/ and post the links here
01:06 PM CaptHindsight[m]: devil.shadow: you should have two lines of joint info for the XX and YY axis
01:08 PM JT-Shop: devilshadow[m], are you using a Mesa card?
01:08 PM devilshadow[m]: yes
01:11 PM devilshadow[m]: i've sent them
01:11 PM devilshadow[m]: on pastebin
01:12 PM JT-Shop: you might want to use my Mesa Configuration Tool
01:12 PM JT-Shop: https://gnipsel.com/linuxcnc/mesact/index.html
01:13 PM CaptHindsight[m]: devil.shadow: post the links to them here so that we can see them
01:13 PM JT-Shop: then just make two joints the same axis and make the home sequence -n for the gantry joints
01:14 PM devilshadow[m]: paste.debian.net/1285723
01:14 PM devilshadow[m]: paste.debian.net/1285724
01:14 PM devilshadow[m]: paste.debian.net/1285726
01:14 PM devilshadow[m]: paste.debian.net/1285727
01:15 PM devilshadow[m]: i will take a look at it
01:15 PM roycroft: pretty soon devilshadow will have to post a pastbin of his pastebins :)
01:15 PM JT-Shop: stepconf does not make a configuration for Mesa cards
01:15 PM CaptHindsight[m]: the first link is using a LPT port
01:16 PM devilshadow[m]: i use this kind of borad https://s1.qwant.com/thumbr/0x380/0/6/11efa9ad6bc7f06671388f62ae5bead4c0c04949bd843d200939dd841beff4/Mach3%205%20Axis%20CNC%20Breakout%20Board%202-1000x1000.jpg?u=https%3A%2F%2Fwww.dynamic.me%2Fimage%2Fcache%2Fcatalog%2FCNC%2FMach3%25205%2520Axis%2520CNC%2520Breakout%2520Board%25202-1000x1000.jpg&q=0&b=1&p=0&a=0
01:17 PM CaptHindsight[m]: devil.shadow: are you using a parallel port card or a Mesa card?
01:17 PM CaptHindsight[m]: that is the BOB ^^^
01:17 PM devilshadow[m]: paraport
01:17 PM CaptHindsight[m]: ah ok, you said yest to using a Mesa card before
01:17 PM CaptHindsight[m]: yest/yes
01:18 PM devilshadow[m]: my bad i don't know the real name of mine
01:19 PM CaptHindsight[m]: are you attaching two stepper drives to each stepper output on the BOB?
01:19 PM devilshadow[m]: no i have one dir and one step for each motors 5 stepper driviers in total
01:20 PM CaptHindsight[m]: or just one stepper drive to each stepper output?
01:20 PM devilshadow[m]: one stepper driver to each output
01:23 PM CaptHindsight[m]: devil.shadow: what does or does not happen now?
01:23 PM CaptHindsight[m]: when you try XXYYZ?
01:23 PM devilshadow[m]: my motors are not getting power
01:23 PM CaptHindsight[m]: does any axis more?
01:24 PM CaptHindsight[m]: all 3 axis do not move?
01:24 PM CaptHindsight[m]: even Z?
01:24 PM devilshadow[m]: yes all 5 are not geting power
01:25 PM travis_farmer[m4: most stepper drivers, the Enable input is more of a disable input. power to it disables the drives
01:25 PM CaptHindsight[m]: travis_farmer: he said it works fine as XYZ
01:25 PM travis_farmer[m4: Hmmm...
01:25 PM devilshadow[m]: i have a XYZ config working with the same enable
01:25 PM CaptHindsight[m]: devil.shadow: I'd double check the wiring first
01:25 PM CaptHindsight[m]: Z should be working at least
01:26 PM CaptHindsight[m]: or have someone else look at the wiring, sometimes you miss your own mistakes
01:27 PM devilshadow[m]: and i should add that in my XYZ config i use 5 stepper drivers
01:28 PM CaptHindsight[m]: devil.shadow: in this config ^^, how did you parallel X and Y?
01:28 PM devilshadow[m]: net estop-out => parport.0.pin-01-out... (full message at <https://libera.ems.host/_matrix/media/v3/download/libera.chat/7a5652dd5ed715af7409a9d0f721b2f9a33419a2>)
01:29 PM CaptHindsight[m]: devil.shadow: is the enable signal active high or low?
01:30 PM CaptHindsight[m]: try hardwiring the enable to be active at all times to all the drives
01:30 PM devilshadow[m]: active high
01:31 PM devilshadow[m]: I don't think it's the issue, but I will try tomorrow
01:31 PM CaptHindsight[m]: well your Z isn't moving either
01:31 PM devilshadow[m]: yes
01:33 PM devilshadow[m]: i need to go, i will try that tomorrow and see...
01:33 PM JT-Shop: devilshadow[m], a long story short, make the homing sequence for the gantry negative so it will home properly and linuxcnc knows it's a gantry
01:33 PM CaptHindsight[m]: do you get any warnings or errors when you take the XXYYZ out of e-stop and try to home any axis?
01:33 PM devilshadow[m]: i will try that first
01:34 PM devilshadow[m]: no and i think the DRO is showing axis move
01:34 PM CaptHindsight[m]: which axis?
01:35 PM devilshadow[m]: i dont want to say lies but i would say all of'em
01:35 PM devilshadow[m]: but im not sure i need to check that
01:39 PM CaptHindsight[m]: devil.shadow: https://www.forum.linuxcnc.org/10-advanced-configuration/37554-dual-motor-gantry-settings
02:10 PM CaptHindsight[m]: https://www.amazon.com/dp/B0C9ZZKNL4 <$29ea
02:11 PM CaptHindsight[m]: another Rpi replacement
02:16 PM roycroft: is it going to last more than 29 minutes?
02:17 PM * roycroft thinks that, below a certain price point, $1/minute should be the life expectancy of the product
02:17 PM JT-Shop: guaranteed to last as long as a 3 year old attention span
02:17 PM CaptHindsight[m]: "After almost two years of studies and dedication, we have the ENG-E2 working with Linux cnc with ethernet communication, we have no latency warnings or connection losses. " https://forum.linuxcnc.org/media/kunena/attachments/25833/WhatsAppImage2023-07-05at2.45.14PM.jpeg
02:18 PM CaptHindsight[m]: " I got frequencies of 150khz, without the rmt I kept 100khz, more than enough for the vast majority of people who use router machines"
02:18 PM CaptHindsight[m]: https://forum.linuxcnc.org/18-computer/42414-linuxcnc-esp32-software-stepping-over-ethernet-using-esp32
02:18 PM roycroft: so i screwed up
02:19 PM roycroft: i was going to do my annual flattening of my workbench top and reapplying tried & true varnish oil to it right before the fair, so the varnish oil would cure while i'm gone, but i did not get to it
02:20 PM roycroft: it would be hard to be without the bench for a week
02:21 PM solarwind: I just received my (probably not actual hiwin) HGR rails today from amazon: 2 x 1m rails with 4 carriages for a total of $110 CAD
02:21 PM solarwind: absolutely amazing quality for what would probably get you the same amount of mild steel from an overpriced metal seller like metalsupermarkets
02:22 PM solarwind: they packed it very well and thoroughly coated it with corrosion inhibitor oil
02:22 PM solarwind: even included the grease nipples
02:23 PM solarwind: HGR series seems to be quite rigid. I think I'm going to upgrade my 6040 CNC router with a set of these things
02:23 PM solarwind: HGR20 specifically is the one I ordered: https://www.amazon.ca/gp/product/B09VC49DS9
02:24 PM CaptHindsight[m]: solarwind: do ju no? https://www.automation-overstock.com/index.asp
02:25 PM solarwind: CaptHindsight[m] I did not. Thanks
02:25 PM CaptHindsight[m]: https://www.automation4less.com/store/hiwinlegacy.asp
02:25 PM solarwind: I just went with amazon because I ordered last night after drugging myself with sleep meds and they show up this morning
02:26 PM CaptHindsight[m]: $1.50 https://linuxgizmos.com/the-nanoch32v003-is-a-risc-v-dev-board-available-for-1-50/
02:27 PM solarwind: I want something more like this: https://tinyfpga.com/ but with PCIe and more pins
02:27 PM solarwind: µC boards stopped being exciting like 5 years ago
02:28 PM solarwind: I have a box full of raspberry pi pico W and that has gotten me through everything. For anything more, I use an STM32H7 with Ethernet
02:29 PM solarwind: I use the Pico specifically for its PIO
02:29 PM solarwind: programmable logic is really important
02:29 PM CaptHindsight[m]: so like an ultrascale on a dime?
02:30 PM solarwind: doesn't have to be that crazy
02:30 PM CaptHindsight[m]: real men buy die and wirebond themselves
02:30 PM solarwind: tinyFPGA is a start once they're back in stock
02:30 PM CaptHindsight[m]: kids today
02:30 PM solarwind: but PCIe host would be great
02:30 PM solarwind: PCIe endpoint* I mean
02:31 PM CaptHindsight[m]: make up your mind, please
02:31 PM ZincBoy[CAON][m]: Bah, sputter on some aluminum and etch your own RDL 🙂
02:31 PM solarwind: Well they can do both, it's the same interface
02:32 PM solarwind: once you get into the gigahertz signalling rates, PCB design and impedance control become very important :(
02:32 PM ZincBoy[CAON][m]: I like the cypress PSOC that have FPGA like resources.
02:32 PM solarwind: Or Zynq is decent too
02:32 PM ZincBoy[CAON][m]: Working on 100+GHz boards now.
02:34 PM solarwind: no you're not, SFP224 standard hasn't even been drafted
02:34 PM CaptHindsight[m]: solarwind: they said the same thing about >100Mhz years ago
02:35 PM ZincBoy[CAON][m]: LOL. I am working on R&D silicon. (well GaAs and SiGe). We have a couple 110GHz VNAs 🙂
02:35 PM CaptHindsight[m]: 3 orders of magnitude later and look where we are
02:35 PM solarwind: ZincBoy[CAON][m] ah ok that makes sense then
02:36 PM CaptHindsight[m]: solarwind: $5 zynq devices would be great
02:37 PM CaptHindsight[m]: maybe Gowin will have them with risc-v in a few more years
04:08 PM solarwind: When would one use a power hacksaw as opposed to a bandsaw?
04:08 PM CaptHindsight[m]: space
04:08 PM roycroft: the final frontier
04:09 PM solarwind: CaptHindsight[m] as in, floor space?
04:09 PM ZincBoy[CAON][m]: When you don't have a bandsaw?
04:09 PM solarwind: Or space constrained cuts?
04:09 PM CaptHindsight[m]: to boldly go into a surface
04:09 PM XXCoder: roycroft: would week of raw wood surface be workable?
04:09 PM CaptHindsight[m]: isn't a bandsaw a power hacksaw?
04:09 PM roycroft: maybe you have a part that is too long to fit in the throat of the bandsaw
04:09 PM solarwind: ZincBoy[CAON][m] why would someone purchase a power hacksaw? I don't imagine they're much cheaper
04:09 PM roycroft: xxcoder: i'm not sure what you mean by that
04:10 PM roycroft: solarwind: they're pretty cool to watch
04:10 PM solarwind: CaptHindsight[m] a power hacksaw is a low speed reciprocating implement attached to a manual hacksaw
04:10 PM XXCoder: just use it without any coating for a weel
04:10 PM XXCoder: week
04:10 PM roycroft: oh
04:10 PM roycroft: well it depends on the wood, the environment it's in, and what it's being used for
04:10 PM ZincBoy[CAON][m]: I can't imagine why you would buy one these days. They take forever to cut compared to a bandsaw.
04:10 PM roycroft: but generally, yes
04:10 PM XXCoder: spray small amount of water, then sand it again to get rid of rised fibers and it should stay smooth
04:11 PM CaptHindsight[m]: https://youtu.be/i-8nIbAAzhw?t=671
04:11 PM XXCoder: it wont be great for long term but short term you has a counter
04:11 PM CaptHindsight[m]: bandsaws have infinite teeth
04:12 PM solarwind: CaptHindsight[m] yeah pretty much that, but a legitimate machine tool
04:12 PM solarwind: and they're generally operated at like one stroke per second
04:13 PM CaptHindsight[m]: use watcha got
04:13 PM CaptHindsight[m]: say there was a bandsaw blade shortage
04:13 PM CaptHindsight[m]: a power hacksaw can have teeth that face both directions
04:13 PM solarwind: https://youtu.be/z5ejhb1t8BY?t=530
04:13 PM solarwind: there we go, that's exactly what I'm talking about
04:14 PM roycroft: space contraints, i think, would be a good reason for using a power hack saw
04:14 PM roycroft: as far as cutting speed, neither a horizontal bandsaw nor a power hacksaw are manually operated
04:15 PM roycroft: i.e. with each of them, you set up the workpiece, turn it on, and walk away until it's finished
04:15 PM CaptHindsight[m]: machines should never run unsupervised
04:15 PM roycroft: so cutting speed is not as costly a factor as with a machine that must be manually tended
04:15 PM roycroft: i did not say unsupervised
04:15 PM roycroft: i said untended
04:16 PM CaptHindsight[m]: yes you didn't
04:16 PM roycroft: you can walk over to the mill or lathe and keep an eye on the hacksaw or bandsaw while you're doing something else
04:16 PM CaptHindsight[m]: unintended?
04:16 PM roycroft: unattended
04:17 PM CaptHindsight[m]: roycroft: hope your fair goes better tomorrow
04:17 PM roycroft: tomorrow?
04:17 PM CaptHindsight[m]: after todays fiasco
04:17 PM roycroft: the next time i'll be at fair (while it's open to the public) will be July 12 of next year
04:18 PM roycroft: it's a three day event that takes place once/year
04:18 PM solarwind: I really need to get myself a horizontal bandsaw. I have a big industrial grade vertical one. Need a forklift to move it around. It's solid.
04:18 PM roycroft: a 7x12 is pretty cheap, and will get you pretty far
04:19 PM solarwind: Yeah that's what I'm looking into
04:19 PM roycroft: i don't think it's worth getting a 4x6 unless you're extremely constrained on cash and/or real estate
04:19 PM roycroft: and i suspect you suffer from neither of those constraints
04:19 PM CaptHindsight[m]: https://www.youtube.com/watch?v=-hVw8mpt9N0
04:21 PM CaptHindsight[m]: https://www.youtube.com/watch?v=awkhVmcxgR0
04:24 PM ZincBoy[CAON][m]: Agreed. I had a 4x6 and it was okay if you babied it. I ran though tons of metal on that thing. Then I got one like this: https://www.busybeetools.com/products/metal-cutting-bandsaw-2hp.html and there is no comparison. The coolant and hydraulic down feed are 100% needed if you are cutting any significant amount of metal.
04:25 PM roycroft: exactly, zincboy
04:25 PM solarwind: ZincBoy[CAON][m] you said you got two heavy duty industrial ones at an auction and they threw in the lathe toolpost grinder!
04:25 PM roycroft: although the one you got is not necessarily what one needs - there's an entry level 7x12 that has the hydraulic downfeed and coolant for a lot less money
04:26 PM solarwind: which I messaged you about on discord coincidentally a couple of days ago
04:26 PM roycroft: the ease of setting up for angle cuts on the one you linked to is very useful
04:26 PM roycroft: but if one generally does 90 degree cutoffs, it's not necessary
04:26 PM XXCoder: oh fair is done already
04:27 PM solarwind: Ah yeah I remember now, you did say it was like the CX117
04:27 PM roycroft: https://www.grizzly.com/products/grizzly-7-x-12-1-hp-metal-cutting-bandsaw/g0561
04:27 PM roycroft: that is the ubiquitous 7x12, that just about everybody makes
04:27 PM ZincBoy[CAON][m]: Yup. I bought the one and the guy said he had another one that didn't work if I wanted it. So I grabbed it as well. It needed a few minor fixes and a new blade but was otherwise fine.
04:27 PM roycroft: yes, xxcoder - i got back late monday afternoon
04:27 PM XXCoder: besides from ex, hope it all went well
04:28 PM roycroft: yes
04:28 PM roycroft: and that happened after the fair, so it doesn't count :)
04:28 PM roycroft: the tripping and falling happened during fair
04:28 PM roycroft: but the real drama did not happen until after
04:28 PM ZincBoy[CAON][m]: Yes, I took that one apart as the when I looked at it the bearings were toast. Haven't had a chance to get new bearings or put it back together.
04:38 PM CaptHindsight[m]: roycroft: how many county fairs do you have there per year per county?
04:42 PM JT-Shop: country fair...
04:42 PM fdarling: ZincBoy[CAON][m]: you said that you have a laser that measures distance, right? Like an LDDM?
04:44 PM ZincBoy[CAON][m]: Yes, I have an interferometer. I currently have optics to do distance, squareness, and straightness. Still looking for the angular setup.
04:45 PM CaptHindsight[m]: like a protractor?
04:47 PM roycroft: there is usualy one county fair per county per year her, afaik
04:47 PM roycroft: but mine is the oregon country fair, not the lane county fair
04:47 PM roycroft: and there is only one of those in the known hippieverse
04:47 PM ZincBoy[CAON][m]: Polarizing beam splitter, angle prism, and two retroreflectors. Measures the distance difference between two parallel beams. The angle is calculated from that.
04:48 PM CaptHindsight[m]: oregon country
04:48 PM CaptHindsight[m]: ah
04:48 PM CaptHindsight[m]: sorry
04:49 PM CaptHindsight[m]: zincboy_ca_on: oh an anglemometer
04:50 PM CaptHindsight[m]: optics is what got me interested in Physics at an early age
04:50 PM * ZincBoy[CAON][m] uploaded an image: (172KiB) < https://libera.ems.host/_matrix/media/v3/download/jauriarts.org/jdyoSQjlmLBrCxssLpQUcnsQ/Lathe_horizontal_leveling.png >
04:50 PM ZincBoy[CAON][m]: https://i.imgur.com/3k2XSC1.jpg
04:50 PM ZincBoy[CAON][m]: ----
04:50 PM ZincBoy[CAON][m]: ##### [null](https://imgur.com/3k2XSC1)
04:51 PM ZincBoy[CAON][m]: I always wanted a laser when I was little 🙂
04:51 PM CaptHindsight[m]: https://imgur.com/gLwOHAg this had lasers and mometers on all 5 axis to compensate for thermal drift/creep
04:58 PM ZincBoy[CAON][m]: Very nice! Is that a CMM type system?
05:11 PM CaptHindsight[m]: 5-axis inkjet
05:12 PM ZincBoy[CAON][m]: For 3d printing or for printing on odd surfaces?
05:13 PM CaptHindsight[m]: non-planar surfaces but yeah it could also be used for additive manufacturing by changing the heads to a heated type for UV cure
05:14 PM ZincBoy[CAON][m]: Cool. I will keep that in mind when I next need to print on a sphere 🙂
05:15 PM CaptHindsight[m]: this one printed onto the cases of a i-device
05:16 PM CaptHindsight[m]: ~200mm xyz
05:17 PM CaptHindsight[m]: for some fruit company
05:18 PM ZincBoy[CAON][m]: Ah, yes. Good old "customer a".
05:21 PM CaptHindsight[m]: https://www.reddit.com/r/dataisbeautiful/comments/14uu3kf/oc_apple_market_value_over_the_years/
05:22 PM CaptHindsight[m]: what happened in 2019?
05:23 PM fdarling: ZincBoy[CAON][m]: I would love to have a laser setup like that... do you have any advice on buying used units off eBay?
05:30 PM JT-Shop: fb marketplace is crap now with the new interface
05:33 PM XXCoder: in least some stuff you can do now compared to before
05:34 PM JT-Shop: well the old interface just showed up
05:34 PM JT-Shop: so maybe they realized it was just crap
05:35 PM XXCoder: oh that recent
05:39 PM JT-Shop: didn't have any paper so I cut some 11x17 in half... seems to work
05:39 PM roycroft: did you cut it in half with your laser?
05:40 PM JT-Shop: paper cutter
05:49 PM roycroft: that's no fun
05:50 PM JT-Shop: effective thou
06:08 PM JT-Shop: night
06:09 PM XXCoder: wondered if it would be possible to make air cutter lol which is like waterjet but with air
06:09 PM XXCoder: I bet it would need massive air tank though
06:09 PM ZincBoy[CAON][m]: It is called a plasma cutter 🙂
06:10 PM XXCoder: lol I guess, but without heat :P
06:10 PM Unterhausen: I bought some wheels for my wood lathe. I wonder how much it weighs
06:12 PM Unterhausen: manual doesn't say
06:12 PM Tom_L: might have been good to know before you bought them
06:13 PM Unterhausen: maybe I should have bought more
06:14 PM CloudEvil: XXCoder: supersonic air doesn't really behave in any way like supersonic water
06:15 PM Unterhausen: only mention online is that it "weighs 550lb or so"
06:16 PM XXCoder: oh really always though air and liquid physics was alike, differences being at scale
06:16 PM XXCoder: I guess extremes break that
06:16 PM CloudEvil: The air jet won't be liquid
06:16 PM Unterhausen: how does supersonic water act?
06:16 PM CloudEvil: Waterjets are basically supersonic (in air)
06:17 PM CloudEvil: Waterjet cutters.
06:17 PM ZincBoy[CAON][m]: Your pressure is just too low then 🙂
06:17 PM CloudEvil: It's basically a very focussed beam of very fast water with abrasive entrained
06:19 PM Tom_L: i bet they wear tips out alot
06:20 PM CloudEvil: moderately, yes
06:33 PM LWK_ is now known as LWK
06:33 PM serp2 is now known as serp
06:38 PM roycroft: i wonder if there's a way to keep the water in a waterjet nozzle from touching the sides of the nozzle
06:39 PM roycroft: physics must know a way, because physics rules everything
06:40 PM roycroft: i know
06:40 PM roycroft: line the nozzles with cats
06:40 PM roycroft: because cats repel water
06:41 PM XXCoder: lol
06:42 PM XXCoder: well water is diamagetic
06:42 PM XXCoder: but to push it away from nozzle sides? more than people can do with current tech I bet
06:44 PM roycroft: yeah, i'm thinking that because water is polar there is some force that can repel/focus it, but it may be too expensive to be cost effective
06:44 PM roycroft: the better solution may be to make cheaper nozzles
06:44 PM XXCoder: whats they use for nozzle currently anyway
06:44 PM Tom_L: charged particles like powdercoat
06:45 PM Tom_L: teflon or ceramic lined nozzles
06:45 PM roycroft: it's not just the nozzle you'd have to be concerned with
06:46 PM roycroft: it's the entire path from where the abrasive is injected to the tip of the nozzle
06:46 PM roycroft: of course, the abrasive may be injected directly into the nozzle
06:46 PM XXCoder: wouldnt it be best to use tungsein
06:46 PM XXCoder: since its expensive, it'd be insert intp less expensive metal
06:47 PM andypugh_: Make the nozzle very hot with inductive heating, use the Leidenfrost effect.
06:47 PM andypugh_: Err, I probbaly should have kept that to myself, it might be a really good idea.
06:47 PM XXCoder: power expenses may be not worth it
06:47 PM roycroft: but i'm assuming it's some kind of venturi setup that's used to offer the abrasive to the water
06:47 PM XXCoder: it has very heavy coolant after all
06:48 PM andypugh_: The thing is, the steam barrier means that thre is surprisingly little heat transfer.
06:49 PM roycroft: yeah, that actually might work, andypugh_
06:50 PM roycroft: the nozzle tip is pretty small, though, and i wonder if things might get weird as it's exiting
06:51 PM roycroft: also, would the power required to keep the nozzle heated to ~200 degrees cost more than replacing the nozzle periodically
06:52 PM andypugh_: Wazer nozzles are relatively cheap at £200 each. And there would be process quality improvements.
07:22 PM ZincBoy[CAON][m]: Read https://www.repairfaq.org/sam/laserhst.htm I bought my laser from SiliconSam on ebay. He tests the lasers and is the source for much of the info on the web about them. I wouldn't buy a random ebay laser as the chances of it working well are low. The optics are easier to obtain and you just need to watch for the right things to come up.
07:31 PM CaptHindsight[m]: XXCoder: you have also described a sand blaster
07:31 PM XXCoder: but taken to cutting point ;)
07:31 PM XXCoder: but yeah
08:28 PM CaptHindsight[m]: for ebay lasers I have purchased from https://www.ebay.com/str/outbackequipmentcompany and
08:29 PM XXCoder: automated handwasher interesting
08:29 PM CaptHindsight[m]: mostly from https://www.ebay.com/str/nextdayautomation
08:35 PM CaptHindsight[m]: https://www.ebay.com/str/cloudraylaser has been OK for CO2 parts
08:36 PM XXCoder: whats the fog machine by the laser machine for
08:37 PM CaptHindsight[m]: dramatic effect unless it's smoke
08:37 PM XXCoder: its standing by laser marking machine
08:49 PM Tom_L: you know it's humid when you step outside and your glasses fog over
08:51 PM XXCoder: in least its not like you walked into wall of water ;)
08:51 PM XXCoder: glasses fog over only happens here if I enter from cold outside to warm inside
08:53 PM CaptHindsight[m]: we just had a tornado warning
08:53 PM CaptHindsight[m]: still feels like the tropics here
09:53 PM * roycroft remembers those days when he lived in chicago
09:54 PM * djdelorie remembers the day I slept in the Chicago airport baggage claim
09:55 PM * XXCoder have no good memories of chicago. probably because he never was there.
09:55 PM roycroft: i'm so worried about the baggage retrieval system they've got at heathrow
09:57 PM roycroft: https://www.youtube.com/watch?v=PvzCuJUqqvw
09:58 PM roycroft: i have lots of good memories about chicago
09:58 PM roycroft: tornados are not amongst them
09:59 PM * roycroft is enjoying both kinds of cookies - peanut butter and chocolate chip - at the same time
10:43 PM solarwind: Hmmm, everyone knows phillips head is complete garbage. But pozidriv seems to be ok
10:44 PM solarwind: square (robertson) / torx / hex still better though. I wish everything were just Torx.
10:45 PM solarwind: Hex cap screws are still easier to find on aliexpress though. Harder to find torx
10:47 PM roycroft: phillips head does exactly what it was designed to do
10:48 PM roycroft: i find robertson/torx to be ugly, and do not use them when aesthetics are part of the project
10:48 PM roycroft: i find socket head screws somewhat more aesthetically pleasing, and use them on metal projects
10:48 PM XXCoder: phillips work well when its made well
10:48 PM XXCoder: which is not 99% of tools
10:49 PM roycroft: but for my wood projects, i use phillips and slotted head fasteners almost all the time
10:49 PM roycroft: the phillips head was designed before we had pneumatic torque wrenches
10:49 PM roycroft: they were designed to cam out prior to shearing
10:50 PM roycroft: the very thing people complain about is the very feature they were designed for
10:52 PM XXCoder: interesting