#linuxcnc Logs
Jan 11 2020
#linuxcnc Calendar
12:34 AM ve7it: ho
12:39 AM ve7it: I get too distracted with projects and ignore IRC for hours! oh the shame!
02:25 AM Deejay: moin
06:14 AM jthornton: morning
06:14 AM jthornton: we got 3" of rain between midnight and 3am
06:21 AM XXCoder: fun
06:23 AM jthornton: we are under a flash flood watch, wind advisory and flash flood warning
06:24 AM XXCoder: here thats quite rare even what with rainforest biome and all
06:24 AM XXCoder: we have pretty good water system
06:47 AM Tom_L: morning
06:47 AM jthornton: yo
06:48 AM Tom_L: 16°F and snow
06:48 AM Tom_L: Hi 32
06:48 AM jthornton: 52°F and rain
06:49 AM Tom_L: good that 3" wasn't frozen
06:59 AM jthornton: took my van to the shop Monday to get the intermediate shaft in the steering column replaced and they found a leaking quick connect for the rear heater and metal on metal on the right rear brake
07:00 AM jthornton: picked it up yesterday and one of the U joints on the new intermediate shaft is bad
07:00 AM jthornton: so it goes back Monday for another one
07:01 AM jthornton: steering is weird and binds up every 1/2 turn... you think the mechanic would have noticed that...
07:02 AM XXCoder: yeah unless test drive simply didnt turn that far?
07:03 AM jthornton: impossible to not notice if you turned the wheel at all
07:03 AM Tom_L: if he was a mechanic he would have.
07:03 AM XXCoder: so that includes zero angle
07:03 AM XXCoder: jeez
07:04 AM jthornton: in the center to turn either way it is very hard then very easy
07:04 AM Tom_L: friend took his truck to the GM dealer for timing gears. got it back with the gears rubbing the front housing
07:04 AM Tom_L: they must have put them on backwards or something
07:05 AM jthornton: GM and Chevy dealers are the worst, they have all new mechanics usually that know nothing
07:05 AM jthornton: Honda seems to have the best mechanics
07:05 AM SpeedEvil: This is why I only ride in cars I machine from a single block of billet aluminium.
07:05 AM Tom_L: good to know. the mrs is looking at hondas
07:06 AM jthornton: we really like the Insight
07:06 AM Tom_L: and so are the boys
07:06 AM Tom_L: may end up getting 3
07:07 AM Tom_L: however spirit just layed off 2800 workers because of the 737
07:08 AM Tom_L: so that affects all the machine shops in town
07:11 AM Tom_L: may wait til March or later to decide
07:12 AM XXCoder: another 737 recently crashed, but not max
07:12 AM XXCoder: same number is assocated though so it still stings for boeing im pretty sure
07:12 AM Tom_L: spirit was boeing here until they pulled out and went west
07:13 AM Tom_L: they recovered well though, and still do boeing work along with airbus and others
07:14 AM Tom_L: they still build the tubes here
07:18 AM Loetmichel: *giggle* $me just bought an $120 air compressor from the local home improvement shop... 220l/min, 24l pressure vessel, 10 bar max, 1100W, no oil, 97dBa... my neighbors in this 4 family house will LOVE me when that thing starts in the middle of the night... I am wondering how long it will last though.
07:19 AM XXCoder: soundproof it
07:33 AM miss0r: syyl: I ended up finishing the oil filter console "last night"...
07:34 AM miss0r: syyl: Well.. it ended up being 5 in the morning.. but you know how it is when you get a good vipe :D
08:34 AM _unreal_: jymmmm, finally
08:35 AM _unreal_: Tom_L, its close to 80F
08:35 AM _unreal_: herhe
08:35 AM _unreal_: here
08:40 AM Loetmichel: *WOAH!* just tested the new 99eur air compessor... MAN they did not lie with the 97dBa on the box. That thing is LOUD!... But it fills the 24 liter pressure vessel to 8 bar in less than 20 sec... good enough for me ;)
08:59 AM sensille: Loetmichel: same here, but i haven't seen the 97dB :(
08:59 AM sensille: but yes, at least they don't lie about it
09:37 AM dirty_d36 is now known as dirty_d
09:40 AM dirty_d: sweet, I got this working https://imgur.com/a/izTkIAk
09:41 AM dirty_d: I need to make some kind of end cap to protect this https://i.imgur.com/JgudxGl.jpg
10:12 AM _unreal_: Loetmichel, sounds like its designed for short runs
10:16 AM skunkworks: dirty_d: How is that running?
10:16 AM gregcnc: What kind of pump on that compressor? the numbers sound optimistic
10:17 AM gregcnc: xxcoder that 737 was shot down
10:22 AM dirty_d: skunkworks, pretty well as far as I can tell
10:37 AM gregcnc: robots in unemployment lines....https://www.yahoo.com/news/robots-automated-businesses-close-bay-213931574.html
10:47 AM dirty_d: I guess this will work as an end cap https://i.imgur.com/RhJjGCe.jpg
11:02 AM dirty_d: that's better https://i.imgur.com/No4Dr6p.png?1
11:53 AM dirty_d: now we're talkin https://i.imgur.com/dKp6GXL.png
12:18 PM _unreal_: hello
01:13 PM cerna: Zume Pizza was so underthinked and hype-marketed that one would cry.
01:28 PM fjungclaus1 is now known as fjungclaus
01:29 PM miss0r: That was a long run :) i started at 8 last night and finished at 5 this morning. https://imgur.com/a/9FcuIRV
01:49 PM BitEvil is now known as SpeedEvil
02:23 PM JT-Shop: miss0r, very nice!
02:59 PM Jymmm: miss0r: That's a 10 mnute job, what were you doing the rest of the time?
03:16 PM SpeedEvil: :)
04:07 PM _unreal_: hi
04:17 PM DaViruz: drinking beer of course, he is danish after all
04:19 PM syyl_: very nice miss0r
04:19 PM syyl_: did the wheelcutter work out in the end?
04:20 PM XXCoder: miss0r: nice indeed
04:22 PM XXCoder: Jymmm: looks exrremely hard metal, 10 miutes is great way to kill tools
04:27 PM JT-Shop: dust looks like cast maybe
04:28 PM XXCoder: hmm first image it has that lead-like dull look so yeah maybe cast?
04:28 PM XXCoder: never run any cast metal at work
04:28 PM XXCoder: wheel cutter big one picture chips is like dust almost like its cutting graphite, so yeah
04:31 PM JT-Shop: I've machined a bit of cast and it's a nasty mess
04:32 PM jdh: I've done a few cuts. messy, but cuts great
04:32 PM JT-Shop: yea machines like butter
04:33 PM XXCoder: guess its not reason he took all day :)
04:33 PM XXCoder: maybe that includes planning, designing, etc
04:33 PM jdh: might take all day to clean all that stuff up
04:33 PM XXCoder: that too
04:36 PM Deejay: gn8
04:48 PM _unreal_: miss0r, OH milling, I thought you ment REAL running
04:49 PM XXCoder: real running?
04:58 PM _unreal_: as in JOGGING
04:58 PM _unreal_: I was like WT....F............ why would someone jog at night time for hours
04:58 PM Tom_L: exercise?
04:58 PM _unreal_: heh
04:58 PM _unreal_: I have yet to contact Jymmm sigh
04:59 PM XXCoder: ah lol
04:59 PM _unreal_: I just want to ask him if he got anything in regards to that welder
04:59 PM _unreal_: like a ring
05:02 PM Jymmm: nope
05:02 PM Jymmm: I got a refund a long time ago
05:13 PM _unreal_: you did?
05:13 PM _unreal_: I thought you saidyou were still waiting on it
05:13 PM _unreal_: I just got some FAKE cartier ring in the mail
05:15 PM _unreal_: i'm 90% sure its from the fake welder
05:22 PM _unreal_: ve7it, trying to find a source for DS275
05:33 PM _unreal_: ve7it, you live?
06:07 PM ve7it: yup hmmm ds275 now shows as obsolete and digikey doesnt have any... you can always leave it off and use a usb to ttl serial dongle to set up the devices
06:08 PM ve7it: put pins in the ds275 holes so you can plug the cable from the serial dongle onto the pins
06:08 PM ve7it: pwr,gnd,rx,tx is all thats needed
07:57 PM _unreal_: ve7it, looks like aliexpress has them ish..
08:00 PM _unreal_: same with ebay ISH. all china
08:06 PM _unreal_: ve7it, I just ordered the motor controllers
08:06 PM _unreal_: found some on ebay
08:06 PM _unreal_: $7 each
08:06 PM _unreal_: got 3
08:06 PM _unreal_: same with the dspic got from ebay from US sellers, $2.50 each aprox got a lot of 5 for $10
08:12 PM _unreal_: ve7it, I just orderd some from china. they are likely knock offs but I'd be SHOCKED if they dont work
08:12 PM _unreal_: wont see them for some time
08:12 PM _unreal_: ok so parts are now orderd
08:12 PM _unreal_: I have not ordered resistors/caps and all of that crap
09:02 PM dirty_d: what kind of motor controllers?
09:20 PM _unreal_: http://ve7it.cowlug.org/dspic-servo.html
09:20 PM _unreal_: dirty_d, are you asking me?
09:21 PM ve7it: glad you found some.... they are nice chips for serial to ttl conversion.... not used much now that most serial is done with USB dongles
09:22 PM _unreal_: ya..
09:22 PM _unreal_: ve7it, do you have a BOM anywhere for all of the smd parts?
09:23 PM _unreal_: ve7it, its killing me I'm working on my daughters machine, I'd rather be working on mine but her @#R$@# project is comming up so I have to finish it
09:23 PM _unreal_: I'm close though
09:25 PM _unreal_: all of the hardware on her machine is done. the only items left are getting the last of the wiring done. I orderd a db25 breakout arriving tomorrow. and some other Item I forget arriving tomorrow. parts for her machine.
09:25 PM _unreal_: OH a db25 female, All I have to do is wire everything up
09:26 PM _unreal_: I just finished mounting all the major parts for her motor controller bo
09:26 PM _unreal_: box
09:26 PM ve7it: I never did a bom.... I think eagle can output one, but I never bothered. all the surface mount resistors and caps will be 1206 size... thats kind of what I stocked my junk box with. If you are waiting for stuff from china, I would suggest ordering a resistor and a capacitor assortment in 1206 size
09:27 PM _unreal_: I dont know much about SMD parts in regards to size to name or designated number system.
09:30 PM _unreal_: ve7it, in your pcb photo. the yellow lines are wire jumps yes?
09:32 PM ve7it: https://www.ebay.ca/itm/1250pcs-lot-50-Value-1206-Smd-Resistor-Kit-0r-10mr-5-100/253904693083
09:33 PM _unreal_: from china LOL
09:33 PM ve7it: something like that is great for the junk box... same with caps yes, yellow unrouted traces are jumpers put on the top side of the 1 sided board
09:35 PM _unreal_: ya looking for some $10 kits on amazon
09:40 PM ve7it: that should be faster.... most of these are cut from rolls that are just about used up in production machines... I got a lot of mine when they changed over from lead to lead free.... they dumped thousands of rolls of parts onto ebay... I have some complete rolls of like 4000 capacitors... dont have to worry about running out!
09:40 PM ve7it: my eye sight will be gone far before the parts
09:41 PM _unreal_: ?
09:41 PM _unreal_: heh
09:41 PM _unreal_: https://www.amazon.com/McIgIcM-16values20pcs-Electronic-Multiplayer-Capacitors/dp/B06XDHC93D/ref=sr_1_5?keywords=1206+Smd+capacitor+Kit&qid=1578799981&sr=8-5
09:42 PM _unreal_: does that have all the values I need?
09:42 PM _unreal_: https://www.amazon.com/Resistor-Ltvystore-Fixed-Assortment-0-25W/dp/B07G4YJCNC/ref=sr_1_10?keywords=1206+Smd+Resistor+capacitor+Kit&qid=1578799640&sr=8-10
09:42 PM _unreal_: those two?
09:43 PM ve7it: those look like good assortments
09:45 PM _unreal_: off the top of my head I just dont know the conversions
09:45 PM _unreal_: .001 to pf what ever
09:45 PM ve7it: If you end up building a bunch of surface mount stuff there are certain values that you tend to use up, but its easy to buy like a 100 of a single needed value. Even new from digikey, the parts are really cheap
09:45 PM _unreal_: ya..
09:46 PM _unreal_: tomorrow I'm going to see if I can mill a bit of wood to make a nice work bed so I can mill out the PCBs
09:46 PM _unreal_: My current pcb platform is for the smaller pcb's I have on hand
09:47 PM ve7it: you have a vacuum table milled out? that should work great
09:47 PM _unreal_: its only 2x2"
09:47 PM _unreal_: ! though thats not a bad idea
09:47 PM ve7it: ah ok
09:48 PM _unreal_: make a larger one
09:48 PM _unreal_: but the moment I punch a hole its useless
09:49 PM ve7it: I sometimes use double sided carpet tape to hold the boards down, but it is usually too strong... pain in the ass to get the board off the fixture
09:49 PM ve7it: a couple of narrow strips usually is enough
09:51 PM _unreal_: dbl sided tape is something I believe I'm lite on..
09:51 PM _unreal_: THEN again I think I have some foam dbl sided tape
09:51 PM _unreal_: hehe
09:54 PM _unreal_: ve7it, I am thinking about gettong one of these for the servo psu https://www.ebay.com/itm/500VA-24V-20A-48V-CT-DIY-Servo-Motor-Power-Transformer-Antek-p-n-AN-5224/252435799458
09:54 PM _unreal_: well the 24v version
09:56 PM ve7it: nice transformer
09:56 PM ve7it: 2 24v windings
09:57 PM ve7it: It should give you about 33V unloaded after a bridge rectifier
09:57 PM nvz: is linuxcnc aware of these hid relay things they got out there?
09:58 PM ve7it: might be a little high... maybe they have something with a few less turns
09:58 PM _unreal_: ve7it, if you can find one that would be great
09:58 PM ve7it: 2 18 or 2 20V windings would be ideal...
10:00 PM _unreal_: https://www.ebay.com/itm/500VA-20V-25A-40V-CT-DIY-Servo-Motor-Power-Transformer-Antek-p-n-AN-5220-/252434922086?hash=item3ac64b3a66
10:02 PM _unreal_: ve7it, any idea how many amps those motor controllers could draw
10:02 PM _unreal_: ?
10:02 PM _unreal_: with the servos that I have which are the same as the gray one in your photo?
10:03 PM ve7it: the circuit limits at 4.7A from the +24V supply or 4.7A from the -24V supply.... (you need 2 supplies)
10:03 PM _unreal_: so that transformer would be idea?
10:04 PM _unreal_: ideal
10:04 PM ve7it: https://www.ebay.com/itm/500VA-20V-12-5A-20V-12-5A-40V-CT-Power-Transformer-Antek-AN-5220/371662652156?hash=item5688d202fc:g:GaMAAOSwI3RW8fS-
10:04 PM ve7it: would be better
10:05 PM ve7it: that should easily power at least 3 servos like you have
10:06 PM _unreal_: ok. ordering unless that guy that I linked to has the same thing. he tends to be a bit cheaper both on price and shipping
10:07 PM _unreal_: nope I dont think he has anything close
10:07 PM ve7it: you can always send the seller a message asking if he can supply a transformer with 20V/12.5A windings
10:08 PM ve7it: two 20V/12.5A windings
10:08 PM _unreal_: oh that link IS the same seller
10:08 PM _unreal_: https://www.ebay.com/itm/500VA-20V-12-5A-20V-12-5A-40V-CT-Power-Transformer-Antek-AN-5220/371662652156?hash=item5688d202fc:g:GaMAAOSwI3RW8fS-
10:08 PM _unreal_: ok so I'm ordering this now
10:09 PM _unreal_: adding the 2yr service plan for $6
10:09 PM _unreal_: $75 for the PSU but hay its got the balls I need :)
10:09 PM ve7it: you will also need a couple of big bridge rectifiers and a couple of big filter capacitors
10:10 PM _unreal_: got that
10:11 PM _unreal_: I'd have to take a photo but I have a nice PCB I built with big ass bridge rec's and caps on. but I dont know about the cap volt values I'd have to check
10:11 PM ve7it: great... you can probably use that for welding (just kidding... but dont short the output!)
10:12 PM _unreal_: Ya I have a board with 3 big bridge recs on it
10:12 PM _unreal_: each one has a 1200uF cap, says 71wv
10:12 PM _unreal_: not sure what that means
10:13 PM _unreal_: one has two 5600uF with 86v value
10:14 PM ve7it: have you got anything that looks like this? https://www.ebay.com/itm/1PCS-PHILIPS-75V-25000UF-Screw-fever-ELECTROLYTIC-CAPACITOR-50X144mm-E346-YX/172970023137
10:16 PM ve7it: you dont need 75V, but something with screw terminals is nice for bulk power supplies... boats might have these stashed on some equipment
10:16 PM ve7it: maybe in invertors
10:17 PM _unreal_: I use to have tons of stuff dont know how much I have left
10:17 PM _unreal_: as far as caps go but the thing I made i'm sure is ok
10:18 PM _unreal_: dont know if I have any with screw terminals any more :/
10:19 PM ve7it: https://www.ebay.com/itm/50V25000UF-2-Parallel-Dual-Power-Filter-Rectifier-Board-Low-ESR-Large-Dynamic/312696746707 never seen anybody do this before...
10:19 PM _unreal_: good lord
10:19 PM _unreal_: hehe
10:19 PM _unreal_: I have a bunch of BIG caps
10:20 PM _unreal_: just I dont know if I have anything left with screw terminals
10:20 PM _unreal_: and I have a big board I built with big caps on it
10:20 PM _unreal_: 12000uF
10:21 PM ve7it: not real critical... a little ripple wont hurt the servos... but 35V ratings or higher is needed
10:22 PM _unreal_: the one's I'm not sure of say 12000uF 71wv
10:22 PM _unreal_: I'll have a nice smoothing setup setup.
10:23 PM ve7it: 71 working votage... kind of odd... any chance you know where they came from?
10:35 PM _unreal_: not a clue
10:36 PM _unreal_: I dug them out of electronics years ago
10:37 PM _unreal_: could be anything
10:38 PM dirty_d: that capacitor board is funny
10:38 PM dirty_d: reminds me of one of those awful frogs
10:38 PM _unreal_: puled a computer out of the dumpster yesterday at work
10:39 PM _unreal_: i3-i7 socket but has a :p celery cpu instead :p
10:39 PM _unreal_: HD still in it hehe
10:39 PM _unreal_: BUT the psu is a euro. 240v 50hz
10:39 PM _unreal_: got to swap out the PSU
10:40 PM _unreal_: that is likely going to become my cnc pc
10:40 PM _unreal_: Hate free stuff :0
10:40 PM _unreal_: :)
10:42 PM dirty_d: It's kinda weird how fusion360 doesn't let you use parameters in some places
10:43 PM nvz: _unreal_: you figure a Core2Duo 3ghz w/4GB ram is enough to run the design side of things on win 8/10 as you suggested windows was easier on the design side of things?
10:44 PM nvz: I'm thinkin I can just put both the Opti 780 SFF and Opti 780 USFF both in my machine's base with a kvm switch and be able to do design and implementation on the same machine
10:45 PM nvz: the SFF machine should be here monday for the linuxcnc, I already have the USFF machine and got no use for it :P
10:47 PM nvz: also considering buying a drawing tablet..
10:47 PM dirty_d: when I'm on linux, and I need to do windows stuff, I RDP to my pc at home
10:47 PM dirty_d: RDP is really nice, even over the internet
10:48 PM nvz: yeah well I already have this Dell Opti 780 USFF it has an Intel E8400 (3ghz) w/ 4GB ram, but no parport.. I ordered the same model in SFF which has a parport and an radeon 3470 HD dual dp video card for it it has the E7500 (2.79ghz I think) w/4GB ram to run linuxcnc
10:49 PM dirty_d: I'm trying my luck with a laptop and ethernet mesa card
10:49 PM nvz: I got 16 cavities in the base of my cnc machine that are about 14x14x6 inches (LxWxH) so..
10:49 PM dirty_d: that is large
10:50 PM nvz: I figure I can put a long hdmi cable coming out of the machine to a 21in or so 1080p monitor and a kvm switch in there to switch the keyboard/mouse/display between the two machines.. one running the machine on linux and the other doing design on windows
10:50 PM nvz: https://www.amazon.com/gp/product/B07QM6ND7R/
10:50 PM nvz: thats pretty cheap, has a remote switch to toggle the kvm
10:51 PM dirty_d: that would work, but what if you want to do the same design work when you're not in the shop?
10:51 PM nvz: I have no use for the USFF machine right now.. I was just gonna add the ram and swap the CPU with the SFF one for linuxcnc
10:51 PM nvz: dirty_d: I can just do as you said and access it remotely :P
10:52 PM dirty_d: true
10:52 PM nvz: I had already considered setting the machine up for remote access at some point in case someone wanted to rent time on the machine
10:53 PM nvz: was thinkin I could put cameras on it and allow people to use it.. and we'd man the shop and just be the monkeys putting the material in and delivering the product
10:55 PM dirty_d: hmmm interesting
10:56 PM nvz: I wanna work on getting this all working on a modern system though.. like buster with a recent kernel and such before I do that
10:57 PM nvz: so far I see some obvious python issues in the UI and I'll have to test the RT in 4.x/5.x kernels
10:57 PM nvz: shouldn't be that hard to get that crap straightened out
10:57 PM dirty_d: I tried the latest arch RT kernel on this machine just for the hell of it, no bueno
10:58 PM nvz: yeah just need to find the problems, and the right wheels to grease :P
10:58 PM nvz: I been on freenode supporting debian for nearly 20 years so.. I figure we can make progress on it
10:58 PM dirty_d: yea, I have so much more to build so I just said screw it and used the linuxcnc live image
10:59 PM nvz: wheezy is still supported by ELTS but thats only certain bits
10:59 PM nvz: when you get into remote acess of the machine I'd like to be running more recent software
10:59 PM dirty_d: yea
10:59 PM nvz: thats a down the road thing though
11:00 PM nvz: we gotta improve my cousin's network first for that and get a firm grasp on the machine itself
11:00 PM nvz: he's got so much shit on his network its all congested.. probably got 3 alexas, several phones, game consoles, smart tvs.. etc
11:00 PM nvz: well 3 alexas not including those build into smart tvs :D
11:01 PM dirty_d: it would be cool if linuxcnc turned into a half open hardware project
11:01 PM XXCoder: you can now
11:01 PM dirty_d: with all the realtime stuff handled on the hardware
11:01 PM XXCoder: it can run on rpi4
11:01 PM dirty_d: I saw that
11:01 PM dirty_d: I read that thread
11:02 PM nvz: yeah I'm less interested in traditional projects than the tech side of things I can do with our new venture like building more machines to sell and renting out our machine either for remote access or for custom stuff
11:02 PM nvz: my cousin and his wife however are gonna be making shit like crazy :P
11:03 PM nvz: she already has a crafts business and a cricut.. she's rather excited about the possibility of a large-scale router/engraver
11:03 PM nvz: we're just working with a 500W spindle and 7w laser to start with, our workable area is like 4x4x0.5ft
11:04 PM dirty_d: I'm building a router with my dad a the same time I'm getting my mill running again. not sure what I'm going to do with it, lol
11:04 PM dirty_d: It's 4x3
11:04 PM nvz: I originally thought of putting an extruder on, but now I think we'll just buy a small 3d printer and scanner at a later point..
11:05 PM nvz: working 3d printing onto this machine would be more headache and cost than its worth
11:05 PM dirty_d: yea
11:05 PM nvz: this is gonna stay a router/engraver will just probably upgrade the tools and add various bells and whistles
11:07 PM dirty_d: I should have got a 3d printer a long time ago. I'm counting on a friend to print the motor covers to protect the encoders on these steppers
11:07 PM nvz: the gantry is large enough I could probably put a plastic spool on the back of the tool assembly and put a heated plate if need be and/or UV lights depending on the material used.. but there is a reason why 3d printers its usually the table that moves :P
11:07 PM dirty_d: I kind of feel like I should have just bought the sets of drivers and stepper with the encoder built in
11:08 PM nvz: it'd just be rather annoying turning this into a combination laser etcher, router, and extruder.. but I could do it I'm sure
11:08 PM dirty_d: It's kind of a pain adding encoders to normal steppers, and I can't even find any more of the drivers for cheap
11:08 PM dirty_d: I found one for $36
11:09 PM nvz: all we really accomplished today was drilling some holes between the internal cavities for wiring and coating the whole base in PU
11:10 PM nvz: I also bought all the nuts/bolts/washers and assembled all the rail bearings and belt tensioners
11:10 PM dirty_d: is this a wooden router table?
11:10 PM nvz: yeah its made out of furniture grade baltic birch 3/4" plywood
11:11 PM nvz: not sure what I'll put on top of that yet.. but I will probably make mdf and aluminim work areas to go on top
11:11 PM dirty_d: we're just using 10-ply, pine core
11:12 PM nvz: the mdf would be good for when routing, to avoid needless damage to the table surface, the expensive 5x5ft baltic birch..
11:12 PM nvz: and the aluminum would provide some thermal insulation for the laser to avoid damage to the table itself
11:12 PM dirty_d: yea ill add a sacrificial sheet on top
11:12 PM dirty_d: I'm kind of worried about how not square and flat this is going to end up
11:14 PM nvz: our machine top is 5x5 but our workable area is only gonna be 4x4 so I'm fine with losing maybe 1/2in z-axis to prevent damage to the table.. cause those 5x5x0.75in furniture grade baltic birch were custom ordered and weren't cheap.. like $57/ea or so I think
11:14 PM nvz: can just put a 4x4 work surface over top
11:14 PM dirty_d: yea that stuff is expensive af
11:15 PM nvz: and we're liable to mess it up.. heh.. cause we got nfc what we're doing
11:16 PM dirty_d: I'm kind of winging it with no plan, table built, ordered rails. Once those are on, built the gantry
11:16 PM dirty_d: still not sure if ballscrews or belts
11:16 PM dirty_d: it'll get worked in either way
11:16 PM nvz: yeah we based ours off free plans, but been learning from them and adapting them a bit
11:17 PM dirty_d: I just looked at a bunch of different ones and have a rough idea
11:18 PM nvz: https://www.youtube.com/watch?v=jjdXpp77MdU I looked at several and ultimately went with this guys plans.. he had full schematics, 3d drawings, parts lists..etc
11:19 PM nvz: so far we've only made small changes
11:20 PM nvz: our table is out of 2x4s not the birch, we're not gonna use it for anything but storage, all the electronics are gonna go in the cnc base itself.. plenty of room in there and in the gantry beam for stuff.
11:20 PM nvz: he used 270os-in nema 23 motors with 1/16 steppers I got 425oz-in with 1/4-1/128 microstep steppers
11:21 PM nvz: he used a cheap $20 hand router like a dremel, and added a 5w laser as an afterthought, we got a 500w spindle with variable speed controlling PSU, and 7w laser
11:22 PM nvz: but for the most part I liked his design, simple yet leaves plenty of room to add crap easily
11:22 PM nvz: when he decided later to add the laser, that video shows how easy this machine is to modify
11:24 PM nvz: so far I got 4 PSUs to put in there, two 36v ~10A for the motors, a 0-100v for the spindle, a 12V, so far just for the laser.. and thinkin of cramming two core2duo machines in there now :P
11:24 PM dirty_d: Oh, I watched that video before
11:25 PM nvz: I was thinking of adding 4x digital ammeters to show the amps pulled on all 4 psus, and a digital tach I can put a sensor on the fan on the back of the spindle and glue a magnet.. and get a good rpm readout
11:25 PM dirty_d: I'm not sure why he used those rails, it seems like he spent more than just buying SBR20 rails,and it was way more work
11:26 PM nvz: idk cost me $60 for 4x 6ft din rails and I could get em locally
11:26 PM nvz: when I looked at flat and round rails that long, it was pretty pricey due to the weight and dimensions to ship
11:26 PM nvz: and couldnt get em locally
11:26 PM dirty_d: but you need toget all the stuff to make the bearings
11:27 PM dirty_d: and you need to rely on accurately drilled holes in wood to get hte preload right
11:28 PM nvz: yeah its a solid and easily serviced system though that can be changed as needed easily
11:28 PM nvz: I got right now 4 spare grove bearings should any need replaced
11:28 PM dirty_d: I just went with 1200mm SBR20s $50 for two rails and 4 bearing blocks
11:29 PM dirty_d: I wanted to use "real" linear rails, but they're a lot more
11:30 PM dirty_d: like HGR20 rails
11:31 PM nvz: I watched a video on flat vs round rails trying to decide.. though the guy was in aeronautics I think and had some fancy equipment I discounted most his findings cause he was putting load on the rails upside down and the flat rail was all scuffed with tool marks so his measurment of force required to move them was rather usless corrupt data
11:31 PM dirty_d: but there isn't really a point since the machine as a whole wont be that straight and flat etc
11:31 PM nvz: then I saw that guy's use of din rail.. and said.. well shit.. I can get those less than 2mi from here easily..
11:32 PM nvz: and just order easily replaceable v-grove bearings with crap I buy at a hardware store also within 2mi
11:32 PM dirty_d: maybe you can make some kind of spring loaded top bearings
11:33 PM dirty_d: i mean bottom
11:33 PM dirty_d: so the top bearings ride on top the the rail, and the bottom ones keep it from being able to lift up
11:34 PM dirty_d: then you don't need to worry about getting the spacing of the holes perfect, or the holes going out of round and loosening up the fit
11:34 PM nvz: that design has one rail down each side of the Y axis, and 2 bearings about a foot apart ride the top and bottom of the rail snugly on either side
11:34 PM nvz: and the x axis has two rails spaced like 5in or so apart with 2 bearings on top of the top rail, and riding the bottom of the bottom rail
11:35 PM dirty_d: depending on what you're cutting, gravity alone could be enough
11:35 PM nvz: the zxis uses a round bearing and screw.. I bought as a 500mm zaxis kit
11:35 PM nvz: the machine is very heavy :P
11:36 PM dirty_d: did you see the follow up video where he upgraded the z axis? he changed those free floating rails to supported ones
11:36 PM nvz: I think I'm also using slightly different belt system.. I have 32 tooth pulleys with a 3mm pitch
11:36 PM nvz: yeah I think I saw that one
11:39 PM nvz: no, I didnt.. cause the "limp to pimp" doesnt sound familiar :P
11:44 PM nvz: dirty_d: we do have a welding station.. I could reinforce that rail if need be
11:44 PM nvz: thats the only change he makes is the new rails are supported along the entire length to prevent any limpness
11:45 PM nvz: but what he doesnt know it'd seem, is that pimps limp :D
11:45 PM dirty_d: hah
11:45 PM dirty_d: I don't think you can do anything to those rails if you use the original ones because the bearings encircle the rail
11:46 PM nvz: we have a lot of tools.. :P
11:46 PM nvz: those bearings are identical only difference is they are cut in the back
11:46 PM dirty_d: well i mean because whatever you add would be in the way of the bearing
11:46 PM dirty_d: the tracks that the ball bearings go through are different
11:47 PM nvz: the first thing I did was donate a welder I'd gotten trying to sell a chainsaw and some guy asked would I trade for a welder, and I said.. weeeelllll.. but I like money though.. but the welder is of same value and I may have a use for it.. heh
11:47 PM nvz: few months later, I saw my cousin's new house and large garage..
11:48 PM nvz: he then bought a bunch clamps, magnetic tool holders for em, wire, tips, full gear for welding.. gloves, apron, jacket, mask..etc..
11:48 PM nvz: and I had him buy a drill press and a hole cutter..
11:49 PM nvz: then we started buying crap for this machine :D
11:49 PM dirty_d: I would like another welder, and a mag drill
11:49 PM nvz: I'm gonna have to redo part of his house before this is all said and done
11:50 PM Tom_L: dirty_d, ask _unreal_ how to get a $15 welder...
11:50 PM nvz: his network is shit, his garage wasn't properly wired for all this.. we were throwing breakers just using the table saw today..
11:50 PM nvz: we gotta make a vac system.. baffles for the compressor and vac so I dont gotta hear that shit :P
11:50 PM dirty_d: did he use car batteries?
11:51 PM nvz: heh
11:51 PM dirty_d: if it looks stupid and it works, its not stupid
11:51 PM Tom_L: nope
11:51 PM dirty_d: I've done that once, hah
11:51 PM dirty_d: the only problem is two batteries isn't enough, and three is way too much
11:52 PM nvz: yeah strangest shit I'd done is probably to jump a car/truck in a pinch
11:52 PM dirty_d: my rods were on fire before they were half through
11:52 PM nvz: once we used a cordless drill to start a dump truck, and I once jumped my volvo with a laptop
11:52 PM dirty_d: lmao
11:53 PM nvz: yeah when you're craming a screwdriver into something and using it as a jumper cable..
11:54 PM nvz: patience is a virtue..
11:56 PM nvz: reminds me of the time I spent a couple months at a computer school.. they had students who were certified techs walking us through a computer on the first day.. basice here is a case, mobo, psu, cpu..etc.. by the time that was over they were all asking me questions including the teacher.. "what's that lill green thing.." "thats an inductor for the voltage regulator for the cpu it pulls current through....
11:56 PM nvz: takes in wave like this.. outputs one like this.."
11:57 PM nvz: which led to the instructor pulling out a computer none of them could get working and a tool they had no idea what it was for..
11:58 PM nvz: I showed them how to use a logic probe to prove the computer worked.. and with a digital multimeter hooked up to that regulator I'd just explained in detail, I showed them both the BIOS powered on and working, and told them to watch and wait.. patience is a virtue :P
11:58 PM nvz: they exclaimed they'd swapped the psu, etc.. but I showed them the 12v line at like 11.6v.. and told them watch the meter and get back to me..
11:59 PM nvz: few minutes later they say its climbing.. as soon as it hit 11.75v the machine was able to power on the cpu, shadow the bios to ram, and execute the POST