#linuxcnc Logs
Apr 23 2018
#linuxcnc Calendar
12:15 AM fragalot: Hi
12:47 AM IchGucksLive: morning thunder outside
12:48 AM fragalot: IchGucksLive: I hope you enjoyed summer becaues it's fall again here :P
12:49 AM Loetmichel: hrhr
12:49 AM Loetmichel: here it is dry, warm as fu** and only slightly cloudy
12:52 AM IchGucksLive: the plants need water :O
12:54 AM IchGucksLive: im off gettig a nice breakfast
01:21 AM Deejay: moin
02:02 AM selroc: hi
04:47 AM jthornton: morning
05:20 AM Tom_L: morning
05:20 AM jthornton: rain rain rain
05:22 AM Tom_L: doesn't look like it's moving much either
05:22 AM Tom_L: sat, gentle rain all day, sun cloudy, today dark
05:24 AM jthornton: I finally got tired of using my POS used JET table saw and upgraded to a new one
05:26 AM Tom_L: 51°F, looks like another nice day here
05:27 AM Tom_L: Wind Speed: 8mph instead of 80
05:27 AM jthornton: looks like tomorrow might be nice here
05:27 AM Tom_L: what kind of saw did you get?
05:28 AM jthornton: SawStop 36" cabinet saw
05:30 AM jthornton: http://www.sawstop.com/build#build-price/professional-cabinet-saw/professional-cabinet-saw_PCS175_TGP236A_MB-PCS-000
05:30 AM Tom_L: looks like a nice one
05:31 AM jthornton: yea, I'm impressed with it
05:31 AM Tom_L: as the price indicates :)
05:31 AM jthornton: I was looking at a grizzly but after reading the manuals on both I went with the SawStop
05:32 AM jthornton: it has adjustments for everything, dialed in the blade to less than 0.001" square to the miter slots lol
05:33 AM jthornton: https://www.youtube.com/watch?v=UbG-n--LFgQ
05:34 AM jthornton: dang refrigerator is messing up
05:42 AM Loetmichel: hurrg... creating a new usb multiboot thumbdrive with yumi takes aaages... this thumbdrive can only do 10mb/sec writing... the 4gb persistent file alone takes 10minutes to copy.
07:25 AM Beachbumpete1: morning linuxCNC
07:59 AM jthornton: morning Pete
08:29 AM * JT-Shop can not figure out how the fill tube for the ice maker was not connected as it was a pain to put back but that does explain the ice berg in the bottom of the freezer...
08:49 AM Beachbumpete1: Hey Jt
08:51 AM hazzy-dev: jthornton: Nice saw!
08:53 AM JT-Shop: thanks, been wanting a good one for a long time
08:53 AM hazzy-dev: I think they are excellent saws, but I will not own one ofter what Dr. Gass did initially
08:53 AM JT-Shop: Dr. Gass?
08:57 AM hazzy-dev: he is the inventor of saw stop mechanism which stops the blade on contact with flesh
08:59 AM hazzy-dev: He tried to have safety laws passed that would require all new table saws to have his mechanism and have all old saws retrofitted with it
09:00 AM cradek: oof
09:02 AM JT-Shop: ouch
09:03 AM JT-Shop: one thing that impressed me was the number of adjustments you can make to get the saw true
09:03 AM JT-Shop: I dialed in the blade to < 0.002" parallel to the T slots
09:07 AM hazzy-dev: Yes they are absolutely fantastic saws, even without regard to the safety features
09:07 AM hazzy-dev: and the fit and finish is bar none
09:07 AM JT-Shop: is Dr. Gass still associated with the saw?
09:08 AM hazzy-dev: I have no clue, I have been out the the wood working circle since about 2005 :)
09:22 AM IchGucksLive: i all
09:23 AM IchGucksLive: Loetmichel, hier ist weltuntergang wolkenbruch
09:23 AM IchGucksLive: Loetmichel, a DA Converter by a NAND GATE PWM https://youtu.be/7yBznQ0MJAM
09:24 AM IchGucksLive: Deejay, kanst du mal da rieinschauen ob man das so lassen kann ? DANKE https://youtu.be/7yBznQ0MJAM
09:26 AM IchGucksLive: im off till later
09:44 AM Loetmichel: maaan, that takes AGES... mounted a new sacrificial plate to my Vacuum table on the CNC router... already faced it off... now to drill 2 times 4800 holes... (the 1/8" drills are already done, just now doing the 1mm ones)... https://youtu.be/ZwAizto843U
09:48 AM hazzy-dev: Loetmichel: What are the holes for?
09:48 AM Loetmichel: sucking down the workpiece
09:49 AM Loetmichel: the table is hollow and has tubes on the side that lead to a vacuum cleaner
09:49 AM Loetmichel: so you can affix sheet metal to the CNC without clamps
09:50 AM hazzy-dev: Ah, my brother uses MDF for the sacrificial table and it is porous enough for the vacuum to pull thru it
09:51 AM hazzy-dev: Are you using garolite fot the table?
09:52 AM hazzy-dev: It looks like some type of plastic in the vid
09:54 AM Loetmichel: pertinax(r)
09:54 AM Loetmichel: Phenloic paper
09:55 AM Loetmichel: phenolic
09:55 AM Loetmichel: MD is indeed porus enough, but i tend to use cooling fluid... so it would be a bad decision ;)
09:56 AM Loetmichel: MDF
10:04 AM hazzy-dev: oh yeah, MDF would not work too well with coolant :D
11:20 AM pink_vampire: Loetmichel: what is the feed on the Z?
11:28 AM fragalot: DAMN
11:29 AM fragalot: missed an ebay auction for a biax scraper by 3 minutes :(
11:32 AM Loetmichel: 3600mm/min, pink_vampire
11:33 AM Loetmichel: actually: 3850mm/min, maximum the machine can do on any axis
11:33 AM jthornton: .seen philip
11:33 AM theCockerel: Sorry, I haven't seen philip around.
11:34 AM jthornton: .seen phipli
11:34 AM theCockerel: jthornton: I last saw phipli at 2018-04-22 - 19:44:10 in another channel.
11:34 AM IchGucksLive: hi all
11:34 AM jthornton: hi
11:34 AM IchGucksLive: the thunderstorms have past avout 25liters of rain
11:34 AM IchGucksLive: now sunny outside
11:35 AM IchGucksLive: gloops,
11:35 AM IchGucksLive: gloops, congratulation to the new price
11:36 AM IchGucksLive: charlot got a nice wave while the gorgew got a bit angry on his visit to hlpital
11:39 AM IchGucksLive: jthornton, you gotr a second to take a look on this new Video i made on PWM to Analog on CNC if it is nearly anderstandable in the meaning of the headline https://www.youtube.com/watch?v=NR7fEm3sbfE
11:53 AM IchGucksLive: .seen bruno
11:53 AM theCockerel: Sorry, I haven't seen bruno around.
11:58 AM JT-Shop: wow old machine light 25w Ikea one 1.4w and much brighter
12:00 PM IchGucksLive: JT-Shop, why not led
12:00 PM Beachbumpete1: https://www.youtube.com/watch?v=xCwwxNbtK6Y SWEEP THE LEG!!! ;)
12:01 PM pink_vampire: Loetmichel: this is the drilling feed???
12:02 PM IchGucksLive: pink_vampire, he is on his way back home from work
12:02 PM gloops: hi Ichs, the new price?
12:02 PM IchGucksLive: prinice of cambrige
12:03 PM IchGucksLive: they left the hospital after labow within the last minutes
12:03 PM IchGucksLive: so born on st margrets day in st margrets hospital
12:03 PM gloops: oh right
12:04 PM gloops: not been watching the news today
12:05 PM IchGucksLive: i got lots of older ladys here exited as Kay Burly without understanding a single word waching for hours
12:05 PM phipli: wibble
12:06 PM miss0r: goodevening o/
12:06 PM phipli: evening miss0r
12:06 PM Deejay: sir o/
12:06 PM pink_vampire: i'm working here also
12:06 PM phipli: has theCockerel behaved - or does it need turning off?
12:06 PM Deejay: madam o/
12:06 PM miss0r: Anyone up to anything interresting?
12:06 PM phipli: not yet
12:06 PM phipli: just got home
12:06 PM phipli: although not working is always fun
12:07 PM miss0r: hehe... I have a shop to clean up.. That is why I am here procrastinating
12:08 PM IchGucksLive: miss0r, i did some videos on PWM to Analog
12:08 PM phipli: I can smell dinner cooking and have already checked for eggs, so checking my emails / IRC was next on the list
12:08 PM IchGucksLive: hi Spirit532
12:08 PM Spirit532: Hi IchGucksLive
12:09 PM miss0r: IchGucksLive: I've build a few of those converters in the pasts :)
12:09 PM Spirit532: How well does LinuxCNC handle 6-axis inverse kinematics?
12:09 PM phipli: https://www.youtube.com/watch?v=vQJG9mRotf4
12:09 PM JT-Shop: phipli no ice in ice maker and an iceberg on the freezer floor this morning
12:09 PM phipli: miss0r, you could turn one of them up instead - sounds more fun
12:09 PM IchGucksLive: Spirit532, it shoudt do so quite well
12:09 PM JT-Shop: IchGucksLive: the Ikea is LED
12:09 PM phipli: JT-Shop, that sounds kinda good?
12:09 PM Spirit532: I'm thinking of using LinuxCNC to convert a KUKA robot to something relatively modern and ENTIRELY less strict on safety
12:09 PM IchGucksLive: Spirit532, the hexapod use this setup
12:10 PM Spirit532: This is serial 6-axis IK
12:10 PM phipli: JT-Shop, perhaps not
12:10 PM JT-Shop: tube from back of freezer to ice maker laying next to fan
12:10 PM Spirit532: nonlinear too
12:10 PM JT-Shop: when it called for ice the water just ran down the coils
12:10 PM phipli: ah - is that likely the problem the whole time?
12:10 PM JT-Shop: can't figure out how it came out, it's kinda hard to put it back
12:10 PM JT-Shop: could have been
12:12 PM IchGucksLive: Spirit532, im in germany
12:12 PM JT-Shop: Ikea in St Louis is a crazy store... I only got 3 of those lights :(
12:12 PM Bruno_: hallp zusammen
12:12 PM Spirit532: IchGucksLive, unless you can sneak into the Augsburg facility and steal drive documents, nothing you can do ;~;
12:12 PM Spirit532: they have it super locked down
12:13 PM IchGucksLive: guten abend bruno masil ist angekomemn
12:13 PM Bruno_: das ist ja schon mal was :-)
12:13 PM IchGucksLive: bruno bitte doppelt auf meine namen drücken
12:14 PM SpeedEvil: Spirit532: yeah. It's almost at the point that the hard part of the arm is the structure.
12:14 PM Spirit532: nope
12:14 PM phipli: .tr hallp zusammen
12:14 PM theCockerel: phipli: "hallp together" (de to en, translate.google.com)
12:14 PM Spirit532: I have everything in working order SpeedEvil
12:14 PM phipli: fail
12:14 PM Spirit532: EXCEPT the controller
12:15 PM Spirit532: it's very angry that it's missing the teach pendant
12:15 PM IchGucksLive: Spirit532, are ther AC servos inside
12:15 PM SpeedEvil: sigh
12:15 PM Spirit532: yes, 6 of them
12:15 PM Spirit532: driven by two 3-motor drives made by Agile Systems in 2000
12:15 PM IchGucksLive: so best to go is with a 7i77
12:15 PM SpeedEvil: Spirit532: In principle, can you purchase one?
12:15 PM Spirit532: yes
12:15 PM Spirit532: for $2500
12:15 PM SpeedEvil: heh
12:15 PM Spirit532: I paid $1730 for the robot, TOTAL
12:15 PM Spirit532: from door to door
12:15 PM SpeedEvil: haggle!
12:15 PM miss0r: what robot, exactly?
12:15 PM Spirit532: KUKA KR3
12:16 PM Spirit532: not the agilus, the old one
12:16 PM miss0r: :o
12:16 PM IchGucksLive: you will get a quite fast robot
12:16 PM miss0r: bargin
12:16 PM Spirit532: it's the same robot as the Thermo CRS F3
12:16 PM Spirit532: but with a different controller
12:16 PM Spirit532: the controller is built like a tank but it's about as easy to service as a tank >_>
12:17 PM SpeedEvil: Spirit532: 'safety'. I mean, yes, a 3kg class robot can give you a nasty bruise I guess.
12:17 PM Spirit532: oh no
12:17 PM miss0r: Spirit532: Realy straight forward, if you have the correct lifting equipment?
12:17 PM Spirit532: this robot will shear your arm off if you tell it to
12:17 PM Spirit532: miss0r, it was 53kg, two people lifted it fairly okay
12:17 PM SpeedEvil: https://www.kuka.com/en-hu/products/robotics-systems/industrial-robots/kr-3-agilus ?
12:17 PM Spirit532: NOT the agilus
12:17 PM miss0r: I'm referring to your tank metaphor
12:18 PM SpeedEvil: ah
12:18 PM Spirit532: https://i.pinimg.com/originals/e9/b5/ed/e9b5ed806b6012f8cbd79c52e88bddb2.jpg
12:18 PM Spirit532: this thing
12:18 PM SpeedEvil: That looks more beefy.
12:18 PM miss0r: but referring to 'shear your arm off if you tell it to'; Someone clearly forgot about the three laws of robotics :D
12:18 PM Spirit532: https://www.youtube.com/watch?v=0PYLC64YS-8
12:18 PM Spirit532: it's very tanky looking
12:19 PM Spirit532: even after I release the brakes it takes a huuuuge amount of force to backdrive it
12:19 PM SpeedEvil: :)
12:19 PM Spirit532: that and it's rated at 800W just for the servos inside
12:19 PM miss0r: I wonder how much it can lift at full extend
12:19 PM Spirit532: 3kg
12:20 PM Spirit532: at full speed, full extension, full acceleration
12:20 PM Spirit532: full speed is close to 3m/s
12:20 PM Spirit532: it's scary, even for a tiny payload class robot.
12:22 PM fragalot: Hey
12:22 PM phipli: evening fragalot
12:23 PM fragalot: phipli: I see what you did to theCockerel :D
12:23 PM phipli: :p
12:23 PM Spirit532: the problem I'm facing right now is actually talking to the drives
12:23 PM Spirit532: since I don't know what to send over RS485 to make the thing do the spinny.
12:25 PM miss0r: :D
12:25 PM miss0r: fragalot: Have you gotten anything more done with your mill?
12:27 PM fragalot: mentally, yes
12:27 PM fragalot: :P
12:27 PM miss0r: :D
12:27 PM fragalot: after giving it some thought.. I realized that I actually only need to scrape in the table, not the saddle
12:28 PM miss0r: now, that makes no sense to me
12:28 PM fragalot: I also realized I do not have a dovetail master.
12:28 PM fragalot: well, what is off is the relation between X and Y, right?
12:28 PM fragalot: if I adjust the Y dovetails, that takes X out of square too
12:28 PM fragalot: yet if I only adjust the X, that can bring them into square to each-other
12:28 PM fragalot: which is all that matters
12:29 PM fragalot: also, pro tip, don't forget to remove the DRO read head when removing a gib.
12:29 PM fragalot: >.>
12:29 PM fragalot: they make horrendous scraping sounds if you don't;
12:29 PM miss0r: ... yeah.. But you need to make that adjustment on the saddle, not the table
12:29 PM fragalot: well yes.
12:29 PM fragalot: I meant the saddle, but the table side
12:29 PM miss0r: Indeed
12:30 PM miss0r: I thought that was the plan all along :D
12:30 PM miss0r: nice little motor timelapse, done right: https://www.youtube.com/watch?v=daVDrGsaDME
12:30 PM fragalot: the plan was to start crying
12:30 PM fragalot: tbh
12:30 PM fragalot: that's a great idea!
12:31 PM fragalot: i'll just make this into a timelapse so it will be over quicker
12:31 PM miss0r: Nothing like a speedy montage :D
12:31 PM fragalot: I've seen whole bridgeports scraped in in 20 minutes
12:31 PM fragalot: :P
12:32 PM miss0r: :D
12:33 PM Rab: Nice, haha @ parts left over at the end.
12:33 PM miss0r: yeah :D
12:34 PM Loetmichel: pink_vampire: indeed, i basically G0ed it intoo the phenolic ;)
12:36 PM Loetmichel: those 1mm tungsten carbide drills can do even faster if there is enough RPM
12:37 PM Loetmichel: at 24k you can plunge them down into FR4(glass fibre board) with 80mm/sec. WAY faster my machine is able to ;)
12:37 PM Loetmichel: in FR2 (that phenolic crap) they can do even more
12:38 PM Rab: I believe the PCB fab industry uses them up to 100K RPM, maybe higher.
12:38 PM Loetmichel: as a friend of mine once said: "optimum feed is found when the drill "screws" into the hole and pulls out a solid chunk of swarf on the way up ;)
12:39 PM Loetmichel: Rab: they do. i have datasheets for the drills that go up to 120kROM
12:39 PM Loetmichel: RPM
12:40 PM Loetmichel: sadly the meek CNC 6040 can only do 70mm/sec without step loss so i set her to 65mm/sec to have a bit of headroom. which translates to said 3850mm/min feedrate
12:43 PM miss0r: fragalot: I might have just scored a nice drawer system for my bolts
12:43 PM miss0r: once in a while something good comes from having guests over for dinner :D
12:43 PM fragalot: I have 2 nice metal stacking drawer sorting boxes you could have
12:44 PM fragalot: each "block" has 6 drawers
12:44 PM fragalot: pick up only, they weigh like 20kg each, empty :P
12:44 PM miss0r: Sounds like something that can handle some weight :D
12:44 PM fragalot: 1.5mm plate, lol
12:45 PM miss0r: yeah well, if you plan on filling the thing with bolts, it needs to be beefy
12:50 PM miss0r: I might be nuts here... but i seem to recall a 'single point' thread mill. as in; a cutting disc on the end of a shaft, you could do a helical interpolation with, to create a thread? if I am not crazy here, what is this thing called ?
12:53 PM enleth: miss0r: single point thread mill
12:54 PM miss0r: enleth: Then it is just ebay failing me... I guess i'll have to buy a real too for starters then ;D
12:55 PM fragalot: xD
12:55 PM fragalot: you could grind a HSS boring blank yourself
12:56 PM miss0r: I 'could' :]
12:56 PM fragalot: :-)
12:56 PM miss0r: I don't even think I have any round ones
12:56 PM fragalot: more grinding
12:57 PM miss0r: no kiddin'
12:57 PM miss0r: I have some cutoff HSS blanks.. Will that work? :D
12:58 PM fragalot: why wouldn't it?
12:58 PM miss0r: 1.2mm thick, it would make for a small cutter :D
12:58 PM gloops: Loetmichel do you machine fibreglass?
12:58 PM fragalot: https://www.hoffmann-group.com/NL/nl/hnl/Modulaire-verspaning/WP-frezen-GARANT/Hoogrendement-draadfrees-Weldonschacht/p/218050 <= that'd get the job done.. assuming your holes are abom sized
12:58 PM Loetmichel: miss0r: https://www.sorotec.de/shop/Zerspanungswerkzeuge/sorotec-werkzeuge/Gewindefraeser/
12:59 PM Loetmichel: gloops: i did a while ago
12:59 PM Loetmichel: for a model shop
12:59 PM jdh: you can use tap with the same pitch. grind down the rest
12:59 PM fragalot: M1.6?? surely not internal?
12:59 PM Loetmichel: fragalot: why not?
12:59 PM Loetmichel: sur einternal ;)
01:00 PM gloops: ive read that machining grp is a nightmare, in fact i think XXCoder does it at work, i was pondering doing some
01:00 PM Loetmichel: +e
01:00 PM fragalot: because I hadn't scrolled down to see it wasn't "one size fits all"
01:00 PM Loetmichel: GRP?
01:00 PM fragalot: Loetmichel: glass reinforced plastics
01:01 PM Loetmichel: fragalot: that wouldnt work for the fact alone that the M16 thread is deeper than the 1mm thread is in diameter
01:01 PM Loetmichel: ah
01:01 PM fragalot: Loetmichel: hence my surprised :D
01:01 PM fragalot: -d
01:01 PM Loetmichel: gloops: i did LOTS of stuff with FR$
01:01 PM Loetmichel: FR4
01:02 PM gloops: what kind of drawbacks are there to it Loetmichel?
01:02 PM jdh: nasty stuff
01:02 PM jdh: eats tooling
01:02 PM fragalot: gloops: tool wear, and the toolpaths are very different
01:02 PM gloops: dust?
01:02 PM fragalot: dust too
01:02 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=314
01:03 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=320
01:03 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=323
01:03 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=344
01:03 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=335
01:03 PM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=359
01:03 PM Loetmichel: ... just as an example ;)
01:03 PM fragalot: Loetmichel: did your puzzle adventure go well?
01:03 PM fragalot: the 3D bendy box thing
01:03 PM Loetmichel: made of a single sheet of 4mm thick FR4
01:04 PM miss0r: I wonder how stiff that thing will be?
01:04 PM Loetmichel: fragalot: http://www.cyrom.org/palbum/main.php?g2_itemId=17046&g2_imageViewsIndex=1 <- judge yourself
01:04 PM Loetmichel: miss0r: STIFF AS HELL
01:04 PM Loetmichel: but expensive
01:05 PM Loetmichel: that stuff isnt cheap
01:05 PM fragalot: color me impressed, Loetmichel
01:05 PM miss0r: What about vibration damping?
01:05 PM gloops: fibreglass is pretty stiff, stronger than carbonfibre but not as rigid
01:05 PM Loetmichel: miss0r: its relatively lightweight
01:05 PM Loetmichel: so no dampening
01:06 PM miss0r: hmm... Interresting idea though
01:06 PM fragalot: Loetmichel: Question: how long will the buttons last? We have a lot of issues with our membrane keypads wearing out when people use a stylus on them
01:07 PM Loetmichel: fragalot: mind you: theere is no glue involved. it just "clicks" in place ;)
01:07 PM Loetmichel: no idea, time will tell ;)
01:07 PM Loetmichel: that "point" on the bottom of the knobs is 1mm diameter though
01:07 PM fragalot: so is the stylus
01:08 PM Loetmichel: and flat, not a half ball
01:08 PM miss0r: 1mm is still pretty small..
01:08 PM miss0r: atleast compared to the fleshy fingers of the regular user
01:08 PM Loetmichel: if it breaks i make another one and turn down the knob a bit
01:08 PM Loetmichel: to maybe 3mm diamenter or so
01:09 PM fragalot: we're using quality premium keypads too
01:09 PM fragalot: they typically last about a year with some users, others haven't come back in over 15 years
01:09 PM fragalot: now they all ship with a giant "DO NOT USE THE STYLUS ON THE KEYPAD!" sticker :P
01:10 PM Loetmichel: hey, a year is good. i doubt the customers are able to change the battery anyways
01:10 PM miss0r: lol
01:10 PM Loetmichel: soldiers... ;)
01:10 PM fragalot: xD
01:12 PM Loetmichel: i was surprised myself that the first try with that "puzzle back" worked like a charm though, fragalot
01:12 PM Loetmichel: didnt think it would fit THAT well
01:12 PM fragalot: yeah, you got those bend radii absolutely perfect
01:13 PM fragalot: getting a 2D bend to fit up nicely is already a challenge
01:13 PM fragalot: getting it right in all directions.. Well done;
01:13 PM Loetmichel: i DO have a bit of experience with that though
01:13 PM miss0r: Any news about archivist yet?
01:14 PM fragalot: yeah he's fine
01:15 PM miss0r: Glad to hear
01:19 PM Loetmichel: thanks anyway, fragalot. even with experience i usually need 2 or 3 tries to get all edges perfect.
01:19 PM Loetmichel: it was a "lucky shot" i guess.
01:19 PM Loetmichel: that are the caveats of doing "metal origami" in CorelDraw8 :-)
01:27 PM pink_vampire: https://www.ebay.com/itm/Precision-Ceramic-Master-Angle-Block-3-x-18-x-24-inches/292471558933?hash=item4418a9d315:g:JycAAOSwHHRa14c9
01:28 PM gloops: dont need one when you can sight stuff in by eye like me pink_vampire
01:30 PM pink_vampire: lol
01:30 PM pink_vampire: yeah
01:41 PM gloops: anyone in canada? looking like a terror incident
01:41 PM fragalot: pink_vampire: https://www.ebay.com/itm/Vintage-Machinists-or-Jewelers-4-by-5-by-1-Velsey-Granite-Surface-Plate/253564327499?hash=item3b099c964b:g:sQQAAOSwvKha09PZ
01:41 PM fragalot: guaranteed to be sighted in flat.
01:44 PM gloops: i suppose theres messing about in the garage flat, making parts for sale but not to NASA flat, then theres true flat
01:44 PM fragalot: don't need a surface plate for garage flat
01:45 PM fragalot: a good table works fine for that
01:45 PM gloops: not for most garage operations
01:45 PM Tom_L: ur a woodworker.. a glass pane would be flat
01:45 PM gloops: i suppose it depends on the persons goal, you could be trying to accomplish some high level of precision for the sake of it or in the pursuit of learning or whatever
01:46 PM gloops: a straightedge is a good guide Tom_L
01:48 PM gloops: i had a conundrum trying to square my gantry, the y axis is higher than the x, cant put a set square on it and tricky to get any reliable measurement, but i got to 1mm just playing around, before i could get the machine to draw a right angle i could look at
01:49 PM gloops: imm over 4x6 ft wasnt bad for guesswork
01:49 PM gloops: anyway bbl
01:51 PM fragalot: gloops: can't you just put a large square on the bed & use an indicator?
02:30 PM hazzy-dev: gloops: What part of canada? I have lots of family in Montreal
02:32 PM gloops: https://news.sky.com/story/van-swerves-across-four-lanes-to-deliberately-hit-pedestrians-witness-11344304
02:32 PM hazzy-dev: Thanks, that is terrible
02:35 PM hazzy-dev: Must have been my brother in law, he has a white sprinter van and tends to fall asleep at the wheel ....
02:37 PM gloops: well, reading it, it seemed as if people were deliberately targetted for half a minute or so
03:00 PM miss0r: night night
03:40 PM Deejay: gn8
04:32 PM hazzy-dev: miss0r: that motor timelapse is awesome!
04:32 PM hazzy-dev: The motor looks VERY familiar, but I can't think what it is
04:33 PM hazzy-dev: Too bad he did not say
04:51 PM hazzy-dev: sheesh, I just got vactra #2 all over the keyboard on my new laptop, and to top it off when I tried to wipe it down quickly before it soaked in too deep I some how deleted about half the files on the desktop
04:55 PM gloops: im not sure what that kind of event is called, but we're all familiar with it
04:57 PM gloops: its like, oh sht i cant believe i spilled oil on the keyboard
04:57 PM gloops: then its like, oh sht i cant believe i tried wiping it off
05:12 PM Spirit532: just in case I fail at my robot hacking
05:13 PM Spirit532: does anyone know of ~80V @ 8-10A *tiny* and relatively affordable servo drives?
05:13 PM Spirit532: quadrature encoders, 3-phase, all the normal stuff.
05:13 PM Spirit532: but they need to be business card-sized or smaller(without the heatsink)
05:13 PM Spirit532: affordable as in I'll need 6 of them for a price that won't break my back
05:27 PM hazzy-dev: Spirit532: That is pretty small
05:27 PM hazzy-dev: You may be able to use STMBL, it is probably too big, but you could use smaller caps and heatsinks and rearrange the two cards to be parallel to each other and maybe get them down enough to meet your size constraint
05:27 PM hazzy-dev: https://github.com/rene-dev/stmbl
05:27 PM Spirit532: I'm already talking to the STMBL dev, he's planning on a smaller version
05:27 PM Spirit532: but it's KiCAD so I might redo it myself
05:28 PM hazzy-dev: That is fantastic! I would be interested in a smaller lower power STMBL too!
05:28 PM Spirit532: the issue is that I only have this much space:
05:28 PM Spirit532: https://i.spirit.re/QRFz7.png
05:29 PM Spirit532: if I do go for a redesign of the stmbl, I'm probably going to be using this ipm https://eu.mouser.com/datasheet/2/196/irsm836-084ma-1228234.pdf
05:29 PM Spirit532: it's fairly cheap
05:29 PM Spirit532: (~$9)
05:29 PM Spirit532: the lower power versions are even cheaper
05:34 PM hazzy-dev: Wow, those look very interesting, and then just handle the encoders with mesa hardware?
05:34 PM Spirit532: no, the encoders would have to be handled by stmbl
05:34 PM Spirit532: but it's just a microcontroller with passives floating around it
05:35 PM Spirit532: so in theory one could make a... NEMA23-sized-ish servo drive capable of ~100W
05:35 PM Spirit532: or ~750W with a heatsink
05:35 PM Spirit532: by just compromising on peripherals(IO, etc)
05:42 PM hazzy-dev: Ok that makes sense
05:42 PM Spirit532: thinking about it... if you ditch the peripherals, this is going to be a BOM of ~$20-25
05:43 PM Spirit532: I should probably trademark the crap out of it and sell it for $949
05:45 PM hazzy-dev: That is a very attractive cost!
05:45 PM hazzy-dev: For a lot of things STMBL is overkill which is fine as it is way cheaper then normal drives, but a low cost/low power version would probably work 80% of the applications
05:47 PM hazzy-dev: Haha, you should also make it so you have to pay extra to have certain features 'unlocked'
05:47 PM Spirit532: now, to find a sponsor... lol
05:47 PM Spirit532: (to hire a programmer, because I am potat at programming)
05:47 PM Spirit532: that, and for someone else to assemble these, because of our customs being sad.
05:49 PM hazzy-dev: where are you Spirit532?
05:49 PM Spirit532: Belarus
05:49 PM hazzy-dev: ok
05:49 PM Spirit532: surrounded by countries with better import laws
06:02 PM gloops: BREAKING: George HW Bush 'IN INTENSIVE CARE' just days after death of wife Barbara Bush https://buff.ly/2HNjLsN
06:02 PM gloops: old bush is going to kick the bucket
06:03 PM Spirit532: isn't this #linuxcnc
06:04 PM Spirit532: not #politics
06:04 PM gloops: yes it is
06:21 PM andypugh: Spirit532: Granite Ioni is the size you talk of, but maybe not the cost: https://granitedevices.com/miniature-servo-drive-ioni/
06:22 PM Spirit532: yeah they seem to have gone a bit nuts on the cost
06:22 PM Spirit532: also none of them handle 80V except their biggest and most expensive one
06:23 PM Spirit532: which is a mind-numbing 489 EUR and huge
06:23 PM Spirit532: you can buy a Mitsubishi or Yaskawa drive for that much
06:23 PM andypugh: Can your motors get enough speed at 60V? (All you lose bu undervolting a motor is top speed)
06:24 PM Spirit532: probably, but I want speed and torque
06:24 PM andypugh: You should still get rated torque.
06:24 PM Spirit532: not at the lower voltage
06:25 PM andypugh: That’s not my understanding.
06:25 PM Spirit532: lower voltage = lower current
06:26 PM Spirit532: should be fairly easy to understand
06:26 PM andypugh: Drives typically run under closed-loop current control.
06:27 PM Spirit532: fair enough
06:27 PM Spirit532: but I still am not paying for an underperforming servo drive at a higher price
06:27 PM Spirit532: (times SIX)
06:27 PM andypugh: If a motor needed rated voltage to make rated torque at zero speed then it could not be able to go any faster than zero rpm.
06:27 PM Spirit532: plus I'd need to design a new power supply capable of handling dynamic loads
06:28 PM andypugh: $150 for the IONI.
06:28 PM Spirit532: too much
06:28 PM andypugh: Sounds pretty reasonable to me.
06:28 PM Spirit532: way, way too much
06:28 PM Spirit532: that's $900 for the boards alone
06:28 PM Spirit532: + I'd need a new power supply
06:29 PM andypugh: I made a bunch of STMBL kits, and those came in at £100 with me making absolutely no money at all on the deal.
06:29 PM Spirit532: yes, because STMBL is heavily overloaded with features for me
06:30 PM andypugh: Most of the features don’t cost all that much. You could just leave them off the boards, but probably only save < £10 per board.
06:30 PM Spirit532: I'd make my own, but again, it's a very painful process to acquire parts in semi-industrial quantities
06:31 PM Spirit532: use a low cost IPM instead of discretes
06:32 PM Spirit532: this is my plan, if I end up designing my own, cut down stmbl
06:32 PM Spirit532: https://www.arrow.com/en/products/irsm836-084ma/infineon-technologies-ag
06:32 PM Spirit532: $7 for an 800W IPM(150 without a heatsink!)
06:39 PM rene-dev: Spirit532: if you make the pinout compatible, you can run the stmbl Firmware on your boards
06:40 PM Spirit532: there he is! :P
06:40 PM rene-dev: Stmbl firmware has been used in many other applications, some not even servo related
06:40 PM Spirit532: I'll probably just hit "del" a bunch of times in the original stmbl design
06:40 PM Spirit532: and call that cut down
06:40 PM rene-dev: That’s one possibility
10:04 PM hazzy-dev: Does anybody know anything about a radial air compressor like this? https://i.imgur.com/JJefMvn.jpg
10:05 PM Rab: I know it looks awesome!
10:05 PM hazzy-dev: It sure does!
10:06 PM hazzy-dev: It seems like a really compact and simple design, but I can't figure out who made it
10:06 PM hazzy-dev: no markings that I can find
10:08 PM Rab: Cattani makes a dental air compressor with that cylinder arrangement, although it's cosmetically quite different.
10:11 PM hazzy-dev: Sure enough, I had not found that. So at least one company still makes that arrangement
10:15 PM hazzy-dev: I just finished rebuilding a conventional devilbiss twin cylinder pump for a compressor I am building, but I might use this radial pump instead
10:15 PM Rab: Have you tested it?
10:16 PM hazzy-dev: Not under power (its 3ph), but I spun the motor by hand and it seemed to pump fine
10:17 PM Rab: Looks like the motor is coupled straight to the compressor, so unless there's an integrated gearbox I think it must be high-speed, high-flow, low-pressure for some special application.
10:18 PM hazzy-dev: That is what I was wondering, unless it has a low speed motor, which I guess it could
10:18 PM Rab: That does look like a pretty beefy motor, maybe it doesn't need reduction.
10:19 PM hazzy-dev: It is a rather beefy motor, and it looks like it is directly coupled to the crank: https://i.imgur.com/YDWMQKi.png
10:20 PM hazzy-dev: Wondering if it just uses the motor bearings as the crank bearings since there is no bearing cap