#linuxcnc Logs
Apr 21 2019
#linuxcnc Calendar
12:00 AM pink_vampire: http://www.tea-guy.com/media/custom_content/tea-101/tea-and-tisanes/brewing-tea/tea-ball.jpg
12:04 AM pink_vampire: this thing??
12:10 AM _unreal_: and I thought I got good sized connectors. they are good sized but hell. the wire is still large enough to make it a pain.
12:10 AM pink_vampire: ??
12:41 AM XXCoder: using ultrasonic as tea brewer. interesting idea lokl
12:41 AM XXCoder: though it'd have to be one thats been never used as cleaner
12:41 AM XXCoder: pink_vampire: why not? heh
12:41 AM pink_vampire: lol yeah
12:55 AM _unreal_: pink_vampire, I'm trying to get the last of the major wiring done on my cnc controller box
12:56 AM _unreal_: once I get it put together I can at least spin my motors
01:57 AM gloops: melt the tea ball and turn it
02:02 AM gloops: (following my first experiment with pewter, spotted a pewter jug in charity shop, got it, stuck it in an old cast frying pan on cooker, melted easy)
02:05 AM gloops: so we know there is heat resistant silicone for moulding for low temp metals, what i cant find out online is how durable those molds are, i.e how many casts you can get before the mould deteriorates
02:06 AM Deejay: moin
02:07 AM XXCoder: gloops: simple enouggh to buy cookie sheet
02:07 AM XXCoder: pour on it few times, making pewler "cookies"
02:07 AM gloops: whats cookie sheet? whats that?
02:07 AM gloops: oh i see
02:08 AM XXCoder: silican cast that you can pour make candies or cookies etc
02:08 AM gloops: those baking molds - to test how long they last with pewter, good idea
02:08 AM XXCoder: and tend to be cheap
02:08 AM gloops: yeah they are
02:09 AM gloops: ill try that, the pouring silicone isnt so cheap, i dont want to waste time and money on it if it only does one cast
02:10 AM gloops: my oven goes to about 250C - not far off pewter melting point anyway
02:11 AM gloops: 170-230C
02:11 AM gloops: should be fine in theory
02:11 AM XXCoder: yeah guy used hot air gun on circuit board on silicine solder board
02:12 AM XXCoder: it slightly discolored and peel off a little
02:12 AM XXCoder: but that was at 400c setting
02:13 AM gloops: probably some aspects of the process that help too - allowing the mould/casting to cool before removing, the rubber will be weaker if you try getting off while its still very hot
02:13 AM gloops: more likely to tear
02:17 AM XXCoder: yeah
02:18 AM XXCoder: cheap enough to play around with baking sheets and see how well it works
02:19 AM selroc: hi
02:19 AM XXCoder: hey
02:19 AM gloops: mr mrs likes the half melted pot in itself lol, says they would make good ornaments - half a pot sticking out of a pool of melal
02:19 AM XXCoder: lol
05:34 AM jthornton: morning
05:34 AM XXCoder: hey jt
05:39 AM jthornton: what's up today?
05:39 AM XXCoder: not a lot
05:39 AM XXCoder: planned to mow, couldnt find key to garage
05:39 AM XXCoder: my sister visited chatted a bit
05:41 AM jthornton: cool, my daughter is up from Texas for a few days
05:41 AM XXCoder: nice :)
05:42 AM XXCoder: https://www.youtube.com/watch?v=PKgK25Nz51Y interesting
05:42 AM XXCoder: hes making magnetic deburr tool. this video is 4th part
05:45 AM jthornton: what's in the black box?
05:46 AM XXCoder: psu I think. big one
05:46 AM XXCoder: its not psu hmm
05:47 AM jthornton: wow that is a long drawn out video lol
05:47 AM XXCoder: might be servo controller
05:47 AM XXCoder: yeah and its part 4. i didnt really pay close attention and fast forward a lot
05:48 AM jthornton: lol it's a magnetic stirrer
05:49 AM jthornton: https://www.youtube.com/watch?v=dKcKYMpYO8Q
05:50 AM XXCoder: yeah it is forgot to say it lol
05:51 AM XXCoder: your link, its swirling poarts pretty good.
05:51 AM jthornton: https://www.youtube.com/watch?v=RcSVV8E2WW0
05:54 AM XXCoder: second one much nicer
05:54 AM XXCoder: barely could watch due to all handcam
05:55 AM Tom_L: morning
05:55 AM jthornton: no way to empty it and the drum will not last very long without a plastic coating on the inside
05:55 AM XXCoder: hmm interesting
05:55 AM XXCoder: hey tom
05:57 AM jthornton: https://www.youtube.com/watch?v=HVgPM1ojyLw
05:57 AM XXCoder: watched that one, i love myfordboy videos
05:58 AM jthornton: looks like he has a new printer
05:58 AM XXCoder: he was making his own version
05:58 AM XXCoder: quiet about it though lately. wonder whats going on
06:04 AM jthornton: I should make a new one with some linear rails
06:05 AM XXCoder: and kickstarter it? ;)
06:06 AM jthornton: no, then I'd have to work making them lol
06:06 AM XXCoder: lol
06:19 AM SpeedEvil: Get together with Myfordboy, keith rucker, and a cast iron maker. Ship people several blocks of cast iron that they scrape into a printer.
06:19 AM XXCoder: with assistance from roberto
06:20 AM SpeedEvil: A 3d printer made like a 1920s shaper would amuse me.
06:20 AM SpeedEvil: Nice pressurised bearings/...
06:20 AM XXCoder: 3d printer with air bearings
06:20 AM jthornton: you should build one like that
06:20 AM SpeedEvil: That would be more sensible, yes.
06:20 AM SpeedEvil: 3d printed air bearings on a granite slab are not actually insane.
06:23 AM XXCoder: lol
06:24 AM jthornton: https://www.amazon.com/Comgrow-Creality-Printer-Upgrade-Certified/dp/B07GYRQVYV
06:24 AM jthornton: wonder if that is any good
06:25 AM XXCoder: no idea
06:25 AM XXCoder: cr-10 seems pretty good from others is saying
06:26 AM XXCoder: but honestly youre expert machine builder. you would make far better.
06:26 AM XXCoder: whats important is speed
06:26 AM XXCoder: and light frame thats rigid
06:29 AM jdh: my son got one of those Ender 3's. He has printed nice looking stuff with it.
06:29 AM XXCoder: ender seems pretty good yeah so are real prusa
06:29 AM XXCoder: i kickstarted obsidan and their test prints seem very good, but its been a while :(
06:31 AM jthornton: too many bad reviews on it lol
06:31 AM XXCoder: on which?
06:32 AM jthornton: that last link
06:34 AM XXCoder: likely clone
06:42 AM XXCoder: apparently theres pi zero wireless
06:42 AM XXCoder: has wireless, frees up a usb port
06:45 AM jthornton: yea I have some of them with cameras on them
06:50 AM tiwake: how does linuxCNC compare to fanuc?
06:50 AM tiwake: (I've never actually used linuxCNC)
06:50 AM XXCoder: fanuc is bit more refined usually but thenthey spend a LOT more money
06:50 AM XXCoder: and its very expensive
06:51 AM XXCoder: but same time new uis is quite good also
06:51 AM XXCoder: in my experence so far, fanuc -> linuxcnc -> haas -> hurco
06:51 AM tiwake: really
06:51 AM tiwake: interesting
06:51 AM tiwake: what about okuma?
06:52 AM XXCoder: problem is my experence with linuxcnc is limited to pc with mouse and keyboard. not effective controls for cnc
06:52 AM tiwake: also, I thought hurco used fanuc controllers
06:52 AM XXCoder: so linuxcnc is racing for me with chain and ball.
06:52 AM XXCoder: im talking in terms of cnc graphics control, on basis of controlling machine itself im not certain
06:53 AM tiwake: well, thats what I care about the most... the UI its self is a different topic really
06:54 AM XXCoder: that aspect i cant tell, as my machine nas never correctly configured before i had to shelve project for while
06:55 AM XXCoder: hurco is quite different and I never liked it lol thought it was nice till I ran older but better machines at current job lol
06:56 AM XXCoder: i finally ran haas recently, including setup porting program, etc. i wasnt impressed with haas at all
06:57 AM XXCoder: its mostly ok, but wheel mode i jog it then stop, and bit later it stops moving.
06:57 AM XXCoder: crash ponental there if go too fast.
06:57 AM tiwake: I can't say I have any complaints with haas
06:58 AM XXCoder: its ok
06:58 AM XXCoder: in least its not hurco
07:00 AM XXCoder: worst machine I ran so far was that ancient cnc machine at last job. forgot name lol
07:00 AM XXCoder: okuma (older one) was mostly ok, but its error on tool change to same tool is just weird,.
07:01 AM XXCoder: and programming around that gives machine high tool crash risk
07:04 AM tiwake: never had that issue
07:04 AM tiwake: sounds like a faulty unit
07:04 AM tiwake: it was an old okuma too
07:04 AM XXCoder: maybe or configuration issue
07:04 AM XXCoder: it was super annoying
10:04 AM _unreal_: finally
10:04 AM _unreal_: Xyz motor cables done
10:13 AM _unreal_: What is that wire guide stuff called that is like a chain and curles uncurls?
10:24 AM Jymmm: _unreal_: "energy chain" if you mean the stuff you run wires/cables in that moves
10:25 AM Jymmm: _unreal_: igus makes all kinds https://www.igus.com/info/energy-chains-designing-calculation-com
11:40 AM fragalot: 'sup
12:11 PM SpeedEvil is now known as Guest54818
02:17 PM CaptHindsight: https://www.reddit.com/r/OpenGalvo/ doing what LCNC has been doing for over a decade, but now on crappy hardware
02:28 PM BitEvil is now known as SpeedEvil
03:09 PM pcw_home: what was that common galvo interface standard? Someone else asked about it, so if I get some time I'll make a stepgen like doohicus with that serial interface outputing positions at 100 KHz or so
03:10 PM pcw_home: If I add acceleration in hardware even 1 KHz position lock should be pretty good
03:19 PM rene_dev_: pcw_home xy2 or analog
03:19 PM rene_dev_: http://www.alaser.com.tw/db/upload/webdata4/6alaser_201412422541519318.pdf
03:22 PM pcw_home: Yeah, if I get a chance I'll make a stepgen like thing that sends that out at some selectable interval
04:03 PM Deejay: gn8
05:54 PM CaptHindsight: XY2-100 is the digital standard
05:55 PM CaptHindsight: the cheap Chinese galvos are mostly XY2 but not the fastest or accurate
05:56 PM CaptHindsight: been using the 7i77 without any problems for years
05:56 PM CaptHindsight: with analog galvos
06:09 PM pcw_home: Adding accel to the hardware for XY2 should allow pretty decent tracking even with a slow update rate
06:13 PM CaptHindsight: it's open loop
06:13 PM CaptHindsight: the galvo amps are internally closed loop
09:32 PM XXCoder: another storage solution https://www.youtube.com/watch?v=e-my5G7NLxk
09:35 PM XXCoder: he uses a pantorouter.
10:12 PM _unreal_: OMG what a pain. I'm recreating my stupid howto document showing what all of the pins are on my main control board. when I redid my laptop 2 months ago I lost the documents I had created in a stupid fashioned.
10:12 PM _unreal_: But On the bright side I've found an error or two on the board.
10:13 PM XXCoder: doh
10:13 PM XXCoder: git it
10:13 PM _unreal_: the perf board I built is NOT pretty but it does work...
10:14 PM _unreal_: in fact its a nice design if I do say so my self if you disregard the hand made clutter. the under lying concept is great.
10:14 PM _unreal_: On the perf board I have 2 74HCT08 chips
10:15 PM _unreal_: they are quad pack AND gates. I'm using them as a BUFFER/multi plex setup for controlling the safety features for my motor controller box.
10:16 PM _unreal_: as is, one chip is for the motor enable. the other chip is for the ESTOP safety.
10:17 PM _unreal_: The estop safety is a work of art if I do say so my self. I have it setup like a ladder logic. it will when hooked up. connect everything required to be in the GREEN or safe setting before I can even enable the MAINS power relay to power the motor power supplies.
10:19 PM _unreal_: so I have 2 inputs like ESTOP safety switches going to one of the gates, the output goes to one side of the final gate control. an other gate takes 2 inputs, the output goes to the 3rd gate and the last inputs goes one each to gate 3 and gate 4. so unless ALL gates have a +v signal. the final output is low and the mains relay can not turn on.
10:19 PM _unreal_: and if its LOW the computer reads it as an ESTOP.
10:21 PM _unreal_: The onlything I'm not sure of is if I want the computer to CONTROL the mains relay or if I want this circuit to control it. I consider it as a redunent safety. where if the computer freezes no matter what I can kill power.
11:57 PM Jymmm: Got bandsaw? https://www.youtube.com/watch?v=zBn5uyRd95o
11:58 PM XXCoder: lol been a while