#linuxcnc Logs

Jun 06 2021

#linuxcnc Calendar

01:45 AM Deejay: moin
03:43 AM veegee: Deejay
03:44 AM Deejay: hey veegee
03:44 AM veegee: I'm going to run a text data visualization on all your messages and see what % of it is "moin"
03:45 AM Deejay: lol
03:45 AM veegee: Initially I thought you had it as an automatic function whenever your computer wakes up when you use it in the morning
03:45 AM veegee: Also thought you were a bot
03:45 AM veegee: But neither really made sense, you're definitely human
03:45 AM Deejay: nope, i type it by hand every time :/
03:46 AM veegee: And so the least I can do is reply with a genuine "good morning" in return
03:46 AM veegee: Good morning to you Deejay
03:46 AM Deejay: yay, good morning veegee :)
03:50 AM Deejay: i should propably leave this channel since i have nothing to say :/
03:54 AM veegee: No, don't leave
04:09 AM veegee: drdoc Yeah I agree, all things considered, A36 is great. Excellent price, excellent availability, excellent weldability, doesn't wear cutting tools, strong enough for anything structural. 1018 is a nice step up though. I think I'll go with 12L14 for anything I don't need to weld, like custom bolts, tool holders, etc.
04:11 AM veegee: https://accusizetools.com/products/turning-and-facing-holders?variant=35245885653146 $40 for this tool holder is fine if you only need one or two. But I'm not going to spend $400 on 10 of them. Time to machine them. Already have the dovetail cutters and everything
05:47 AM unterhaus: I buy these toolholders https://www.ebay.com/itm/131483468641?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
10:22 AM gloops: ive got a problem
10:23 AM gloops: linuxcnc install on wheezy, left PC on for a couple of days unused, now seems to gone into sleep mode and wont wake up
10:23 AM gloops: usb ports are dead
10:24 AM gloops: (so cant move mouse or press keys)
10:25 AM Tom_L: restart it?
10:27 AM gloops: tried it, powered off, restarted 90 times
10:28 AM gloops: had this about 3 months ago, faffed with everything no joy, eventually it just started one time without knowing what id done
11:43 AM drdoc: https://www.amazon.com/Model-Engineering-Peter-Wright/dp/1854861522
11:43 AM drdoc: click "See all formats and editions"
12:07 PM drdoc: golly gee
12:08 PM drdoc: Remind me to *not* buy any tools that take WW collets...
12:23 PM gloops: 'hibernation' issue fixed. seems to have been the graphics card causing problems
12:23 PM gloops: plugged monitor into onboard port - everything comes on
12:23 PM gloops: also seems linuxcnc is happy running on the onboard
12:23 PM jymmmm: https://imgur.com/gallery/awBpOBx
12:25 PM jymmmm: Has anyone seen that joint? Know it's name???
12:26 PM Tom_L: roycroft should
12:27 PM Tom_L: it's a dovetail variant
12:28 PM gloops: yeah he might know, its a dovetail obviously, might be some name for it
12:28 PM gloops: bitch to cut with cnc though
12:29 PM gloops: or maybe not, vertical table, dovetail cutter
12:29 PM Tom_L: cross between that and a mitered butt joint
12:29 PM Tom_L: https://www.thesprucecrafts.com/wood-joinery-types-3536631
12:29 PM Tom_L: i think somebody just had too much time on their hands
12:30 PM jymmmm: box joint ???
12:30 PM Tom_L: it's a hybrid
12:30 PM Tom_L: i bet
12:30 PM jymmmm: It's cool either way
12:30 PM gloops: seen similar fancy stuff for boxes
12:31 PM gloops: these artisans who set their pitch on being highly skilled and so on
12:31 PM gloops: make stuff like that to show themselves off
12:31 PM jymmmm: lol, hell I would =)
12:31 PM Tom_L: like i said, they just got too much time on their hands
12:32 PM jymmmm: haha, oh come on, gotta give em their due credit
12:32 PM Tom_L: i just did :)
12:32 PM jymmmm: ok :)
12:34 PM gloops: i had some vids of cnc cutting box joints and dovetails, must have deleted them from youtube
12:38 PM jymmmm: gloops: That happens a LOT, and why I download them if you like em. https://ytmp3.cc/youtube-to-mp3/ or https://www.y2mate.com/en68
12:39 PM gloops: i did draw these out and they run ok in cad, never actually made any though https://ibb.co/bPqCmDC https://ibb.co/hWsbtz9
12:40 PM gloops: heart dovetails, people might get the wrong idea
12:40 PM gloops: cheers jymmmm ill save the links
12:41 PM Tom_L: i've got a router jig for dovetails
12:41 PM jymmmm: gloops: very cool on the hearts
12:41 PM gloops: although those arent matching tails lol
12:41 PM jymmmm: gloops: Yeah, I actually have them on me toolbar
12:42 PM jymmmm: gloops: eh, so what, they'll work =)
12:42 PM jymmmm: https://imgur.com/gallery/ekjz0ch
12:47 PM jymmmm: I found my new home... https://imgur.com/gallery/fc70yTp
12:48 PM gloops: no wait, here i am - dovetails the easy and noisy way https://www.youtube.com/watch?v=XL18xJf0_Do
12:51 PM gloops: and slower box joints https://www.youtube.com/watch?v=J82ggHEGOt4
01:11 PM jymmmm: https://imgur.com/gallery/qJMx72n
01:24 PM Tom_L: wonder if that cost him a phone
01:30 PM jymmmm: https://www.tomsguide.com/best-picks/best-waterproof-and-water-resistant-phones
01:40 PM jymmmm: bbq mac and cheese burger anyone? https://imgur.com/gallery/X2Tk9pR
01:41 PM Tom_L: heart attack
01:46 PM jymmmm: https://imgur.com/gallery/i36wlNc
01:51 PM Tom_L: i'd like to know how they built those castles
01:51 PM Tom_L: had to take a long time
01:52 PM Tom_L: is that your 2nd home?
01:52 PM Tom_L: the prior one your 1st?
02:07 PM jymmmm: I wish =) it be cool
02:08 PM jymmmm: this is cool https://imgur.com/gallery/QpBxk9h
02:09 PM jymmmm: Tom_L: Whereever that camera is at, I'd have a table and chairs and be every sunset
02:26 PM jymmmm: Y'all need a rolex... https://imgur.com/gallery/QFy8oxp
02:26 PM jymmmm: especially cradek :)
02:32 PM jymmmm: https://imgur.com/gallery/Dg9T76K
02:33 PM Tom_L: meh, that's ok. i might have an itch halfway across
02:34 PM Tom_L: indiana jones would have used his belt
02:43 PM veegee: Wow there are very few videos on how to use a tool and cutter grinder
03:00 PM jymmmm: hahaha https://imgur.com/gallery/rclm5yg
03:04 PM veegee: Can anyone identify the make and model of this tool and cutter grinder: https://photos.app.goo.gl/4CFAcnbHSCYxepmt6
03:04 PM veegee: Sorry for the bad pic, was at friend's warehouse and he's moving out so he wants to get rid of it
03:04 PM veegee: I'm likely going to take the vertical mill and surface grinder too for the right price
03:05 PM veegee: It might be the dust covering it, but I wasn't able to find a nameplate
03:06 PM veegee: Also the fixture on it looks atypical for a tool and cutter grinder. Hopefully he has the original one
03:07 PM veegee: jymmmm I appreciate anyone with a sense of humour. Shows they're not a stuck up ass who takes everything too seriously and personall y
03:35 PM enleth: https://i.redd.it/k256ebnv1o371.jpg
03:37 PM enleth: veegee: isn't that a nameplate on the bottom of the second photo?
03:41 PM veegee: enleth that's a sticker for the repair company that likely has been out of business for 30 yeras
03:41 PM veegee: also it's unreadable or I would have taken a picture of it
03:42 PM veegee: I should have brought my A7R3. Cell phones have such shitty cameras
03:57 PM enleth: veegee: that's not strictly true anymore, although there's only so much you can do when your lens assembly needs to fit within 4mm of depth
03:57 PM veegee: enleth I have the latest iphone and it's still shit
03:58 PM veegee: It's shit compared to my 10 year old Nikon D90
03:58 PM veegee: and it's certainly shit compared to my $20,000 kit of Sony A7R3 and Sony GM lenses
03:59 PM enleth: can't argue with that
03:59 PM veegee: They do an insane amount of postprocessing
03:59 PM veegee: That's the only way to get semi decent photos where details don't matter
03:59 PM veegee: With my A7R3 and 200mm Sony GM telephoto, I can read the newspaper of the dude in the office building across the street
04:01 PM enleth: that rig won't quite fit into the pants pocket, though
04:01 PM enleth: but I get what you mean, if you're used to the capabilities of a pro setup
04:02 PM enleth: but I'd reserve "shit" to what cell phone cameras have been 10 years ago
04:03 PM enleth: now it's more like "meh, but actually usable for some things"
04:03 PM enleth: 10 years ago it was just shit and nothing more
05:03 PM Tom_L: i don't get why they need 3 camera chips on em now
05:24 PM roycroft: i ran out of clamps again
05:24 PM roycroft: and i've run out of money to buy more clamps, and i've run out of space to store more clamps
05:24 PM roycroft: 'tis the bane of the woodworker
06:24 PM enleth: Tom_L: compositing and/or different optics
06:26 PM enleth: Tom_L: regular camera, macro camera (often with a sensor more suited to low-light conditions than the regular one), and an IR-sensitive camera is a common combo now
06:26 PM enleth: and a pile of complex math to composite the three together
06:28 PM enleth: the low-light sensor is often inherently slower, so the other one is used for high speed video
06:30 PM enleth: (and I know almost all digital imaging sensors are IR-sensitive, but that's usually filtered out, deliberately leaving out the filter on one of the sensors is a thing though)
07:09 PM veegee: enleth I usually leave the 35mm pancake lens on my A7R3 which _almost_ fits in pockets
07:09 PM veegee: It definitely fits in the smallest compartment in my backpack
07:11 PM veegee: https://www.sony.ca/en/electronics/camera-lenses/sel35f28z this one has very good image quality and is very compact
07:11 PM veegee: also next to no focus breathing and good sharpness overall
07:12 PM veegee: This one https://www.sony.ca/en/electronics/camera-lenses/sel90m28g takes unreal macro shots. It's the sharpest lens among all camera systems at the moment
07:13 PM enleth: personally, I'm waiting for light field photography hardware to get more mainstream, it would be so cool to be able to use it on a whim
07:15 PM enleth: it's a legitimate photography technique, not just cheating in the post
07:21 PM enleth: it opens up similar possibilities toba tilt/shift setup
07:27 PM Connor: What's a good CAM program for a lathe?
07:34 PM Tom_L: paid or free?
07:34 PM Tom_L: doubtful if free includes the tool geometry
07:35 PM Tom_L: then there's the issue of a post that works
07:36 PM Tom_L: https://onecnc.com/en/products/products-overview/lathe
07:36 PM Tom_L: might be one to look at
09:55 PM veegee: What would be a good steel to use to make these tool holders? https://cdn.shopify.com/s/files/1/0427/8409/6410/products/678_source_1438806796_800x.jpg?v=1595014654
09:55 PM veegee: I'm thinking 12L14
09:55 PM Tom_L: maybe too soft
09:56 PM Tom_L: something you can harden a bit
10:01 PM veegee: Tom_L case harden or fully through harden?
10:02 PM Tom_L: something like that probably case harden is good enough
10:03 PM Tom_L: we used to make stamp dies for sheet metal and would only flame harden the cutting edge
10:05 PM roycroft: anderson cooper is interviewing sir david attenborough on 60 minutes tonight
10:05 PM roycroft: sir david is 95, and he looks more like he's 70
10:05 PM roycroft: i don't think i've ever seen a person in their 90s looking that young
10:07 PM veegee: Tom_L 4140 or 4340 is probably overkill eh
10:07 PM Tom_L: veegee, you are overkill!
10:08 PM Tom_L: i don't know my steels that well really
10:08 PM Tom_L: i knew 12L14 has alot of lead in it
10:09 PM veegee: Tom_L 12L14 has a yield strength of 60,000 psi
10:09 PM veegee: that's a lot more than I thought for an alloy designed for machinability above all else
10:09 PM veegee: no other steel comes close to the "machinability" rating
10:09 PM Tom_L: i didn't say it wouldn't work
10:10 PM Tom_L: i think my sherline tool holders are 12L14
10:10 PM veegee: I tend to get quite deep into whatever I'm doing. It would make me uncomfortable to just randomly pick a steel without at least knowing some stuff about it
10:11 PM veegee: I'm going through all the alloys here: http://www.carbidedepot.com/formulas-machinability.htm
10:11 PM Tom_L: but i have a couple the holes for unscrewing them are oblong
10:11 PM Tom_L: so it is a soft steel
10:11 PM veegee: 1144 is insanely strong in the "as rolled" condition, like 90,000 psi yield
10:11 PM Tom_L: find something with a little carbon in it so you can harden it
10:12 PM veegee: Just curious, why is hardness an important factor here?
10:12 PM Tom_L: wear resistance
10:12 PM veegee: It's not doing any cutting. It's holding tool holders
10:12 PM Tom_L: i've seen some pretty beat up tool holders
10:12 PM veegee: The wear would only be on the dovetail part and the screw thread if changing tools
10:13 PM veegee: But the goal here is to make like 10 of them to avoid changing the tool so I'm not worried about the screw thread
10:13 PM Tom_L: then use 12L14
10:13 PM veegee: The only part that matters here is the dovetail. I have the wedge type tool post, so there is some sliding action unlike the piston type
11:21 PM mrec: does anyone really use 3mm step down with a 3mm endmill?
11:22 PM mrec: because that's the default with freecad, according to some books they say yes the stepdown should not be bigger than the diameter but does that really apply in practice?
11:33 PM W1N9Zr0: https://niagaracutter.com/speedfeed says for cutter diameters <=1/8" slotting DOC should be .05-.25x diameter. for >1/8" cutters, .05-1.5x
11:35 PM W1N9Zr0: especially for cutters with more than 2 flutes, there's probably not enough chip evacuation at 1x DOC with 3mm cutter
11:36 PM roycroft: mrec: every machine behaves differently - your cam software may have some defaults, but it's up to the machine operator to configure the cam software to produce results that work well on the particular machine being used