#linuxcnc Logs

May 14 2020

#linuxcnc Calendar

12:02 AM zipper is now known as Guest41655
12:16 AM CatTuner_PhD is now known as FruitFlavored
01:20 AM Loetmichel: dirty_d: you dont want to though if you want to stay owner of your IP.
01:21 AM Loetmichel: That said, Freecad is indeed well known for bugs and quirky UI that is inconstent between modules
01:21 AM Loetmichel: at Thorhian
01:39 AM Deejay: moin
03:37 AM Loetmichel: Deejay: did you get that i have a new toy? -> https://www.youtube.com/watch?v=CcXoe3QBUzA
04:43 AM JT-Cave: morning
04:46 AM XXCoder: hey jt of the cave
04:47 AM JT-Cave: I put a heating pad under the germination tray and it seems to work two Cherokee Purple tomato seeds have sprouted over night
04:48 AM XXCoder: nice!
06:31 AM Tom_L: morning
06:37 AM JT-Cave: morning from soggy Swamp East Missouri
06:47 AM Tom_L: no rain rightnow
06:47 AM Tom_L: 64°, Hi 81
06:47 AM Tom_L: looks like more headed your way
07:37 AM Tom_L: nice
09:12 AM p0g0: JT-Cave, re that chainsaw mill- you have all the requisite parts? Ripping chain, 36" bar, Really Big Saw, a decent chain grinder, & someone sane and strong to work the far end of the saw? Are you expecting to mill boards or just square off logs?
09:39 AM dirty_d: JT-Cave, I was thinking about building one of those
09:40 AM dirty_d: I should just buy one though since it's so cheap compared to a chainsaw
09:41 AM norias: hmmm
09:41 AM norias: what's cheap compared to a chainsaw?
09:43 AM dirty_d: Strongway 36in. Portable Sawmill
09:44 AM dirty_d: JT-Cave, have you seen this? https://www.youtube.com/watch?v=8qz64ELkxdA
09:45 AM norias: hmm, yeah
09:45 AM norias: sawmills
09:45 AM norias: i wish i had the time
09:46 AM FinboySlick: dirty_d: I love his scooter timberjack ;)
09:55 AM dirty_d: yea, haha
10:07 AM JT-Cave: p0g0, I just need to square up and half a 36" red oak from there we cut it on the bandsaw mill
10:09 AM JT-Cave: I'll use my MS391 which is a bit small for 36" but you don't ever have 36" of bar cutting, I think the max is 32" and yes I have a proper ripping chain and yes I have a Oregon sharpener
10:23 AM JT-Shop: and SolidWorks tells me my biggest cut is under the 25" max bar for the MS391 so I think I'm good
10:34 AM jymmmm: god morning
10:34 AM jymmmm: good*
10:48 AM p0g0: JT-Shop, That sounds very doable.
10:51 AM JT-Shop: yea and there will be 2 of us to break it down and load the cants on the trailer
11:00 AM * JT-Cave looked at the video briefly and filed it in the too amazing to be true bin
11:22 AM Deejay: re
11:53 AM t4nk_freenode: WELCOME BACK Deejay!
11:54 AM Deejay: thanks
01:50 PM FruitFlavored is now known as CaptHindsight
02:59 PM jymmmm: hola
03:06 PM Tom_L: salut
03:21 PM jymmmm: I keep disconnecting, did anyone reply to my Q ?
03:22 PM XXCoder: you just said hola
03:22 PM jymmmm: REPLAY:
03:22 PM jymmmm: (12:59:05 PM) Jymm: hola
03:22 PM jymmmm: (01:03:16 PM) Jymm: Does anyone have a jumppack or mess with Li batteries?
03:22 PM jymmmm: (01:09:52 PM) Jymm: https://www.ebay.com/itm/2pcs-HRB-22-2V-6S-5000mAh-LiPo-Battery-50C-100C-EC5-for-RC-Helicopter-Airplane/263398159585 They list that as 100C Burst (500A), but what is typically defined as "burst rate" (in seconds)?
03:26 PM jymmmm: XXCoder: This guy did a GREAT review of jumppacks... https://www.youtube.com/watch?v=JN8A2nIMUWA
03:27 PM XXCoder: cool
03:27 PM jymmmm: https://www.amazon.com/dp/B07GR17R3X/ Is what I'm looking at getting
03:29 PM jymmmm: I'm guessing they are stepping down the voltage from 14.8V (4S) ?
03:30 PM XXCoder: https://pbs.twimg.com/media/EX9yLmCXsAA40RV?format=jpg&name=900x900
03:30 PM XXCoder: accurate?
03:46 PM likevinyl is now known as Guest47619
03:51 PM Deejay: gn8
03:56 PM Thorhian: When it comes to running LinuxCNC on RPi4, is there a specific OS image I should use to get Debian Buster and RT-Preempt?
03:56 PM jymmmm: XXCoder: that be totally cool, but need a chair
05:14 PM _unreal_: soo much beter
05:18 PM infornography: what did you do?
08:28 PM Thorhian: Got all of my Mesa cards and my Raspberry Pi4 + accesories today!
08:29 PM Tom_L: nice, i got my pi today
08:31 PM Thorhian: Nice Tom, are you trying it out as a controller as well?
08:31 PM Tom_L: i got it for testing yes
08:32 PM Thorhian: I'm currently downloading Raspbian Lite.
08:32 PM Tom_L: you didn't get a sd with it?
08:33 PM Tom_L: i loaded jeplers image
08:35 PM Thorhian: I got an SD, you need one. Also, who is Jepler?
08:35 PM Thorhian: And where can I find it lol?
08:35 PM Tom_L: naw, i got a couple
08:36 PM Tom_L: jepler is a linuxcnc developer
08:36 PM Tom_L: the image hasn't been released yet
08:36 PM Thorhian: Oh.... So I can't use it?
08:36 PM Tom_L: you'd have to ask him
08:37 PM Tom_L: since it's on his bandwidth presently
08:37 PM Thorhian: :/ Ah, I see. Do you have the image?
08:39 PM Tom_L: yeah
08:40 PM Thorhian: Well, I'll try configuring my own for now I guess. I don't think jepler is online, unless he has a different username on here?
08:41 PM Tom_L: did you get the plugin mesa card for the pi?
08:41 PM Thorhian: Yes, the 7C81 along with the 7i76.
08:53 PM Thorhian: Tom_L: What is jepler's IRC username?
08:54 PM Tom_L: jepler
08:54 PM Tom_L: he's in the devel channel
08:55 PM Thorhian: Thank you.
08:56 PM norias: wait
08:56 PM norias: there's a different channel for linuxcnc development?
08:57 PM Thorhian: Yes, many projects do usually, for development purposes rather than general and support discussion.
08:59 PM Tom_L: norias, yes, it's reserved for developement discussions
09:01 PM norias: neat
09:01 PM norias: what is it?
09:01 PM Thorhian: It's pretty easy to guess ;)
09:02 PM Tom_L: #linuxcnc-devel
09:02 PM norias: linux-devel ?
09:02 PM norias: oops
09:02 PM norias: can't type tonight
09:10 PM CaptHindsight is now known as FlightlessKite
09:47 PM FlightlessKite is now known as LotsaRastaPasta
10:21 PM _unreal_: getting my motor control box futher allong
10:22 PM _unreal_: most of it done just have a few parts left to hook up
10:22 PM _unreal_: then I can start linking the psu supply box to the motor control box. and the relay box ETC..
10:24 PM norias: *sigh*
10:24 PM norias: i wish i had a machine to play with
10:25 PM norias: i had this idea of a machine simulator box
10:25 PM Tom_L: build one
10:25 PM norias: like a rpi
10:25 PM norias: that lies to the controller cards
10:25 PM norias: simulates feedback and what not from motors
10:25 PM norias: i wonder if you could just run linuxcnc in a VM
10:26 PM norias: and simulate the whole thing
10:33 PM _unreal_: norias?
10:33 PM _unreal_: so you dont have a CNC machine?
10:33 PM norias: no
10:33 PM _unreal_: SO BUILD one
10:33 PM norias: eh.
10:33 PM norias: maybe.
10:33 PM _unreal_: dude you could build a heavy duty one for $50
10:34 PM _unreal_: its called a pipe dream I'M NOT Kidding.
10:34 PM norias: yeah, i'm not certain what the benefit of that would be
10:35 PM _unreal_: what size machine would be ideal for you for a starter?
10:35 PM _unreal_: what do you plan to do
10:36 PM _unreal_: ?
10:36 PM norias: uh. I'm not sure how to answer that
10:36 PM norias: on what time scale?
10:36 PM norias: a vf-2 would be a good starter. ha
10:37 PM _unreal_: https://drive.google.com/open?id=1EzVANFGFA96IZYhtiRTWMElxfJVwtkb5 http://www.angelfire.com/ego/stevenmanzer/CNC_PipeDream.html
10:37 PM _unreal_: the first link is the back of my machine
10:37 PM _unreal_: old picture but you can see how I mounted my axis
10:37 PM norias: yeah
10:37 PM _unreal_: angle iron with ball bearings. and ubolt
10:37 PM _unreal_: with a bearing
10:37 PM _unreal_: the second link is the pipedream.
10:37 PM norias: i think the mechanical issues would be a distraction
10:38 PM _unreal_: My bearying method with the ubolt and some for of the pipe dream would be VERY easy and cheap
10:38 PM _unreal_: ?
10:38 PM norias: i'm fairly uninterested in the mechanical details of cnc machines at this point
10:38 PM _unreal_: mechanical?
10:38 PM _unreal_: I have no idea what you are seeking then?
10:38 PM norias: they... are machines
10:39 PM _unreal_: ether you can afford to buy one. so just buy one. IF not then build one.
10:39 PM norias: well, a simple thing i'm interested in is automatic chatter detection and avoidance
10:39 PM norias: in milling
10:39 PM norias: there's some internal feedback i'm interested in working on
10:40 PM norias: i _think_ we can infer part geometry from tool path
10:40 PM norias: and define the inferred geometry as the target of the process
10:41 PM norias: and allow the machine to do internal optimization so long as it achieves target geometry
10:41 PM _unreal_: o,O
10:41 PM _unreal_: feeds and speeds
10:41 PM _unreal_: also every machine is different
10:41 PM norias: right, and width and depth of cut
10:41 PM norias: my initial thought is you don't want to change speeds
10:41 PM _unreal_: different designs have different pro's and cons
10:41 PM norias: unless it's to avoid chatter
10:42 PM _unreal_: sensing chatter is not likely to happen because its more a product of over stresing the machine
10:42 PM norias: uh, no, that's not true
10:42 PM norias: it's a function of the natural harmonics of the structural loop of the machining process
10:43 PM norias: if you have one speed at which chatter emerges, you can pretty much map out all the speeds
10:43 PM norias: that would generate chatter with that tool, tool holder and machine combination
10:44 PM _unreal_: good luck to ya
10:44 PM norias: yeah, i mean, that's why it might make more sense to simulate
10:44 PM norias: until some algorithms are worked out, etc