#linuxcnc Logs

Sep 07 2017

#linuxcnc Calendar

01:11 AM IchGucksLive: morning from Germany
01:13 AM IchGucksLive: Tom_itx: still online
01:15 AM Wolf__: think I’m going to try making a fidget spinner https://i.imgur.com/VLg6PhL.jpg
01:18 AM IchGucksLive: Wolf__: better to buy it its damm cheep
01:18 AM Wolf__: lol did you see the size of that bearing?
01:18 AM Wolf__: I was over visiting friend that buys industrial auction lots
01:19 AM Wolf__: find all sorts of fun stuff there https://i.imgur.com/nYO2xSJ.jpg
01:19 AM Wolf__: like tub of lifting rings I was standing in to get to another box of stuff https://i.imgur.com/BEQH6AB.jpg
01:20 AM Vq: IchGucksLive: morning to Germany
01:20 AM IchGucksLive: ;-
01:20 AM Wolf__: bunch of VFD in his last lot, too bad they are all 3ph input =/
01:21 AM Wolf__: I did get a new in box control transformer for my mill
01:22 AM Vq: 3ph is wunderbar, embrace it. :)
01:22 AM Wolf__: it is, unless you don’t have it in your shop lol
01:22 AM Wolf__: which I don’t =(
01:28 AM Wolf__: well, sleep time here, early day tomorrow, guess I’ll have to dream about a 3ph drop to my house lol
01:36 AM KimK is now known as KimK_
01:36 AM KimK_ is now known as KimK
01:43 AM IchGucksLive: someone is on grabcad
01:43 AM IchGucksLive: and can check the modell
01:43 AM IchGucksLive: https://grabcad.com/library/4-axis-aluframe-hiwin-square-rails-ballscrew-cnc-mill-1
01:45 AM IchGucksLive: till later
02:22 AM Deejay: moin
05:13 AM jthornton: morning
05:17 AM XXCoder: hey
05:21 AM XXCoder: jthornton: https://www.youtube.com/watch?feature=player_embedded&v=-BpXzBzKfPw heh
05:33 AM jthornton: https://www.youtube.com/watch?v=WcI1e4KiDv0
05:37 AM XXCoder: its bit ironic that enterprise is one that have never really went to space.
05:39 AM jthornton: didn't know that
05:39 AM XXCoder: well simple reason really, it was a prototype, and it cost too much to retrofit it to later design
05:44 AM jthornton: wow it's 49F outside
05:45 AM XXCoder: heh in one of star trek books, Enterprise shuttle was retrofitted with modern tech so it simply launched itself into space and went into warp
05:46 AM XXCoder: I guess it surivived ww3, council green war, and evenually gentic supermen war
05:46 AM SpeedEvil: XXCoder: Of course it did - trek was quite popular, and lasted until the trek universe came into being.
05:48 AM XXCoder: I lost interest with Enterprise, it started off very good
05:48 AM XXCoder: then billion time wars shows :(
05:48 AM XXCoder: it briefly recovered before end of series
05:49 AM XXCoder: it didnt help that they suddenly had tech they didnt at start
05:50 AM SpeedEvil: yeah
05:51 AM XXCoder: I love time travel trope but its often lame story writing and when author is out of ideas
06:34 AM Tom_itx: 53F
06:37 AM jthornton: 48F
06:38 AM * jthornton wonders if the fence fairy finished up the posts last night...
06:40 AM XXCoder: I finished it for you
06:40 AM XXCoder: just $1000 a minute labor, cheao
06:41 AM jthornton: and you finished in a nano second?
06:42 AM XXCoder: nano-millenium actually
06:42 AM XXCoder: night
06:42 AM jthornton: night
09:57 AM IchGucksLive: hi from gerrmany
09:57 AM nubcake is now known as nubcake_
09:57 AM nubcake_ is now known as nubcake
10:14 AM kb8wmc: IchGucksLive: good day to you
10:15 AM IchGucksLive: hi
10:15 AM IchGucksLive: i got all 124 trads done by hand today
10:15 AM IchGucksLive: fingers are bad
10:15 AM IchGucksLive: but no tread tool killed
10:16 AM IchGucksLive: hi mt
10:17 AM kb8wmc: very good, you have been busy
10:20 AM IchGucksLive: mtpocketscnc: are you around Rockford in WI
10:21 AM IchGucksLive: there is a trade far on 25.sep
10:52 AM IchGucksLive: hi stustev
11:20 AM IchGucksLive: later
11:22 AM HighInBC: wow my CNC arrived only 11 days after ordering it
11:22 AM MarcelineVQ: what'd you get?
11:23 AM HighInBC: need to clear a place for it...
11:23 AM IchGucksLive: so weekend is full of mounting
11:23 AM HighInBC: https://www.aliexpress.com/item/500W-CNC-3040-Router-Engraving-Drilling-CNC-3040-Z-DQ-3040-CNC-Machine-3-Axis-Milling/32809540385.html
11:23 AM HighInBC: I won't be able to get it going until I get the computer setup though
11:23 AM IchGucksLive: HighInBC: this will run on the DVD
11:24 AM IchGucksLive: no need tro setup
11:24 AM HighInBC: DVD? like what I watched movies on in the past?
11:25 AM HighInBC: this is going to be fun
11:25 AM MarcelineVQ: anyone know anything about this cute little thing? I've got no details on it other than its price. https://s3-us-west-2.amazonaws.com/usedphotosna/62737389_934.jpg https://s3-us-west-2.amazonaws.com/usedphotosna/62737394_934.jpg
11:25 AM HighInBC: I was totally preparing myself for a 1-2 month delivery, I have not even setup a place for it yet lol
11:26 AM MarcelineVQ: HighInBC: that's certainly the timeframe I'd expect for something coming by boat
11:26 AM archivist: MarcelineVQ, reports seem to be not the best milling machine
11:26 AM HighInBC: came by fedex
11:26 AM HighInBC: not bad for free shipping
11:27 AM HighInBC: well, they obviously put the hsipping price in the price of the item I suppose
11:27 AM MarcelineVQ: archivist: The labeling suggested that to me too but an all in one little thing at a good price, figured I'd better ask about it. Do you by chance have any more details?
11:28 AM archivist: MarcelineVQ, I dont have one but another irc user did
11:29 AM archivist: they are badged under a few names
11:30 AM MarcelineVQ: archivist: thank you
11:31 AM archivist: in the uk https://www.machinemart.co.uk/p/cl500m-metal-lathemill-drill/?da=1&TC=GS-060712520&gclid=EAIaIQobChMIr4CF2riT1gIVSbvtCh0FYAbeEAUYBCABEgJ4qvD_BwE
11:34 AM archivist: another version http://www.chesterhobbystore.com/centurion-3-in-1-machine-3976-p.asp
11:35 AM archivist: and the grizzly http://www.grizzly.com/products/Combo-Lathe-Mill/G4015Z
11:38 AM MarcelineVQ: neat stuff. these things would be frustrating for a machinist but for someone just starting out, having a unit that cover your bases seems like a good route, do you have an opinion on that? iirc you added a 4th axis to your mill
11:40 AM archivist: 5 axis these days :)
11:41 AM archivist: for a beginner they may be ok, but setup and change from one job to another is going to be a bit of a pain
11:50 AM HighInBC: found the first problem, the speed control rheostat is loose... feels like they glued the knob on it won't budge
11:50 AM HighInBC: need to get under it to tighten the nut
11:51 AM archivist: thin sheet metal spanner?
11:51 AM HighInBC: that would be handy to have
11:51 AM HighInBC: good idea, I bet i can cut one out
11:52 AM HighInBC: who glues a knob on, but does not bother to loctite the nut...
12:04 PM archivist: if it is a collet knob, then take the front cover off
12:04 PM archivist: will appear stuck on but just a good grip
12:16 PM * JT-Shop takes a few before pouring the concrete for post #11
12:32 PM IchGucksLive: hi from germany
12:41 PM roycroft: hi from smokeland
12:51 PM IchGucksLive: hi gloops
12:56 PM gloops: evening
01:05 PM JT-Shopp: hey gloops thanks for the tip on the spade bit for the hilti, took my 9" spade and tried it out then cut it in half and added enough to have 24" went out and damn if it didn't unscrew near the top weld... didn't even notice it was two pieces lol, cut that off and re-welded
01:05 PM JT-Shopp: man does that go much faster now
01:08 PM gloops: lol, well i just noticed some fence installers using a similar setup and i thought thats a good idea, i tried it - took all the slog out of digging post holes
01:11 PM IchGucksLive: gloops: what is a spade bit
01:12 PM gloops: we call them bolsters here - like a flat chisel for a breaker or drill
01:12 PM gloops: woman asking me here about a problem with her 6040 machines
01:13 PM gloops: 'I'm having the same problem set all my cnc6040z up it came up with pulse engine not enabled now it's stuck in a position won't go ref all home or move at all'
01:13 PM IchGucksLive: woman is pink
01:13 PM gloops: 'I don't know if settings have changed I had it working set home points when to do a job and that was it won't move now'
01:14 PM gloops: lol, i dont know anything at all about that machine
01:14 PM gloops: pulse engine not working whats that sound like?
01:14 PM IchGucksLive: best on main issues is DELETE the CAR file
01:15 PM IchGucksLive: VAR
01:15 PM IchGucksLive: pulse engine is WIN
01:16 PM IchGucksLive: so she only needed help on mach
01:17 PM IchGucksLive: gloops: today
01:18 PM FinboySlick: MarcelineVQ: The combo lathe/mill probably aren't very useful for CNC conversions.
01:18 PM IchGucksLive: no ladys in the log
01:18 PM FinboySlick: Oh darn, I hadn't noticed that the window was scrolled all the way up.
01:18 PM gloops: oh not asking in here, shes on facebook
01:19 PM IchGucksLive: FinboySlick: but good showeffect
01:19 PM IchGucksLive: gloops: comand hr here
01:20 PM IchGucksLive: pink have been frustrated and now she makes the fantastic parts
01:23 PM IchGucksLive: so finished PCB routing tomorrow 24 PCB boards to be milled
01:23 PM IchGucksLive: drilled ;-)
01:25 PM Tom_itx: stack em and use a long bit
01:25 PM IchGucksLive: im old and have time
01:25 PM gloops: well i have successfully surfaced some legs ends set in resin, but destroyed the 400w router haha
01:26 PM gloops: log ends
01:26 PM Tom_itx: you have less time than you did yesterday
01:27 PM IchGucksLive: gloops: how can you destroy a router
01:27 PM Tom_itx: hopefully some toys will show up today
01:27 PM CaptHindsight: archivist: https://www.axios.com/tv-turns-90-today-2482515293.html
01:27 PM IchGucksLive: Tom_itx: i recived hc-05 and Ds3231
01:28 PM IchGucksLive: lots of fun
01:28 PM IchGucksLive: but i think time runs out on corn harvest right around the corner
01:29 PM IchGucksLive: whow night is falling quick i looked outside 7min ago in daylight and now its dark
01:30 PM IchGucksLive: the temp sensor inside the RTC is quide cool
01:30 PM gloops: Ich i tried paring off what i thought was a pointless bit of plastic casing - was stopping clamp fitting snug, and it contained a wire coil wrapped round a carbon - was in shreds when i looked
01:30 PM gloops: carbon ring
01:31 PM HighInBC: argh, I have errands I need to do today
01:31 PM HighInBC: would much rather be setting up my new cnc
01:31 PM IchGucksLive: HighInBC: take your time
01:32 PM gloops: have got new spindle in post from germany
01:32 PM IchGucksLive: it will ruun sooner then later
01:32 PM HighInBC: tru dat
01:32 PM HighInBC: going on a trip in a week too
01:32 PM IchGucksLive: HighInBC: you expected many days more without
01:32 PM HighInBC: I don't think I will get it running until I get back, I still have to source a computer
01:33 PM HighInBC: what kind of specs does it need? Other than a parallel port
01:33 PM IchGucksLive: take a 10USD one
01:33 PM HighInBC: $10 computer? like a pi zero?
01:33 PM IchGucksLive: no
01:33 PM HighInBC: hehe
01:38 PM HighInBC: hmm http://linuxcnc.org/docs/2.6/html/common/System_Requirements.html makes me think I can use the old junker system I retired for this
01:38 PM HighInBC: not very demanding
01:39 PM HighInBC: it even has a parallel port
01:40 PM HighInBC: an old AMD Athlon 64 X2, 2.0GHz, 2GB DDR2
01:40 PM MarcelineVQ: it's worth noting that most mobos have parallel and serial pin headers, even brand new modern ones, they just don't ship the jacks.
01:40 PM HighInBC: good to know
01:40 PM HighInBC: a reasonable compromise
01:41 PM IchGucksLive: i cand find any of my pc im using in dozenz in the CA bay
01:42 PM HighInBC: I need to buy a monitor, keyboard, mouse for it
01:44 PM gloops: i got about 6 from car boot sales, £5 - £10, up to 10 year old
01:44 PM IchGucksLive: HighInBC: on that Router use lifebook
01:45 PM gloops: the key is to start collecting stuff BEFORE you need it
01:45 PM IchGucksLive: i got a 7110 lifebook on the Sculper at 5m/min 4 axis no single streplos
01:45 PM HighInBC: good to know.
01:46 PM IchGucksLive: but i got real hardware
01:47 PM IchGucksLive: im off Gn8
02:02 PM fltrz: I am new to machining, I hoped that you guys could point me to a channel about machining/metalworking so I don't interrupt this channel which seems focussed on CNC control with linuxcnc?
02:03 PM HighInBC: I would also like to know about such a channel
02:04 PM SpeedEvil: There isn't one. #mechanics and #engineering in principle
02:04 PM SpeedEvil: Also #woodworking
02:14 PM fltrz: I was wondering, given the surface speed requirement, how are the really micro drills used on metal? i.e. 10micron diameter drill bits (0.01mm), wouldn't that require ludicrous RPM's?
02:14 PM cradek: yep
02:14 PM fenn: you can always drill slower
02:15 PM fltrz: how do they use them? what kind of spindles/motors/drive mechanism do they use?
02:16 PM fltrz: fenn: drill slower, I have tried looking up more about that, I read something about "peck drilling"? loads of lubricant, airpuffs to remove debris and taking pauses at the bottom of each peck and slowly retracting?
02:16 PM SpeedEvil: ludicrous RPMs are sometimes used
02:17 PM SpeedEvil: http://www.mmsonline.com/articles/micro-milling-at-12-million-rpm
02:17 PM SpeedEvil: (actually 1/2)
02:17 PM SpeedEvil: but still
02:17 PM fltrz: can one simply put these 3mm shank drills in say a proxon micro drill press? or does it require special elite chucks etc?
02:18 PM fltrz: ok, then I started wondering about dentist tools, I think these use high RPMs as well
02:18 PM fenn: for making these size holes you probably want to use a different method, for example laser, FIB, electron beam
02:19 PM fltrz: if I want to CNC at tiny scales, would I be better of using a dentists micro drill as spindle, and design the CNC axes for such a dentists drill?
02:19 PM fltrz: money :)
02:19 PM fenn: the above article says dental drills have much too high runout (swing of the tip of the drill)
02:20 PM fenn: maybe EDM
02:20 PM fenn: or ECM
02:20 PM fenn: essentially electroplating in reverse
02:20 PM fltrz: I was wondering if runout can be mitigated, perhaps runout is not as critical for a dentist, and chuck with less runout could be made my mounting a fine chuck and drilling the hole in the chuck yourself?
02:22 PM fltrz: also, I have a proxon MF 70 micro mill, would that be sturdy and robust enough for such a 0.01mm micro drill?
02:23 PM fltrz: (I think the RPM would be way to slow though)
02:24 PM fenn: for such small dimensions you would be more concerned with backlash and precision in the drive mechanism
02:24 PM cradek: no you're not even in the right neighborhood
02:24 PM HighInBC: hmm my CNC came with a cable labelled "USB-CNC USB TO CNC-DB25". I wonder if it is a generic usb parallel adapter or if it sports a MCU with gcode interpreter
02:24 PM HighInBC: no documents in english at all, just what looks liek a checklist in chinese
02:24 PM fenn: fltrz: you should be using optical components meant for microscopes, not machine tools
02:24 PM HighInBC: manuals are for wimps anyway
02:24 PM cradek: you are sure you have to *drill* 10 micron holes? because that's going to be a very hard thing to do
02:25 PM HighInBC: lasers
02:25 PM SpeedEvil: especially if drilling more than foil
02:25 PM SpeedEvil: LASERs have their own issues
02:25 PM HighInBC: removing them from the sharks is the hard part
02:27 PM fltrz: For my project I was thinking of machining, I was mostly wondering what kind of tools these drills are made for?
02:28 PM fltrz: btw the material in which to drill is aluminum
02:34 PM fltrz: "But a dentist’s drill may also have a runout of 10 microns" may have :)
02:35 PM gloops: what are you actually making fltz?
02:35 PM fltrz: so basically, if I get a dentists drill, and try 30 chucks I might get lucky?
02:36 PM fltrz: gloops: not yet making, but considering to make molds for solder
02:36 PM fltrz: or pewter
02:36 PM HighInBC: oh there is a manual, just hidden in the styrofoam
02:37 PM HighInBC: good, real men read the manual
02:37 PM fltrz: since freshly cut aluminum oxidizes within microseconds forming corundum or other aluminum oxides, you can't solder to it, it wont stick, I'm hoping to use this effect
02:37 PM fltrz: so I don't need a release agent
02:37 PM gloops: http://www.ebay.co.uk/itm/Mini-Micro-Hand-Drill-Rotary-Tools-Aluminum-Keyless-Chuck-10X-HSS-Twist-Drills-/202039698506?hash=item2f0a81244a:g:MZYAAOSwWM9ZpVRR
02:38 PM HighInBC: have you considered milling PTFE(teflon)?
02:38 PM fltrz: the parts are for a "human hand" micromanipulator, instead of tweezers
02:38 PM HighInBC: it can handle solder temps and very little sticks to it
02:38 PM HighInBC: much softer
02:39 PM fltrz: would it deform much at solder temp? its an interesting suggestion...
02:39 PM gloops: this would be agonisingly awkward with a twist bit, you need a ball nose or something
02:39 PM HighInBC: hmm not sure about softening, I know I use PTFE magnetic stir rods up to very high temps
02:39 PM fltrz: gloops: sure, the drill bit was just to ask for the kind of tool in general
02:39 PM HighInBC: you using low temp solder?
02:40 PM fltrz: the same supplier of the drill bit I saw also sold ball nose mill also 0.01mm
02:42 PM fltrz: can "blank" chucks be found? where the chucks are already entirely made except for the hole, and possibly also without the cuts to comply with bending when gripping?
02:43 PM fltrz: i.e. so as to let the end-user drill his own shank holding hole?
02:44 PM HighInBC: I want to mount one of these: http://www.ebay.ca/itm/122654769214 to my CNC
02:44 PM HighInBC: usb microscope
02:45 PM fenn: most small drills have a standard size shank, like 1/8 inch
02:48 PM gloops: those are collet chucks
02:49 PM gloops: if you get an 8th inch collet you can reduce the size with sleeve inserts
02:49 PM gloops: collet sleeves
02:50 PM gloops: a variable chuck might be better, i really dont know what kind of chuck is used for micro bits
02:52 PM fltrz: I meant, in case the chuck has runout, and I make some jig where a drill is static except for depth translation, and where I can change x,y position of the drill with say screws and the angles too, so I can correct the jig after optical inspection for runout
02:52 PM fltrz: so I drill into the blank rotating chuck
02:53 PM fltrz: rotating in the dentist drill
02:53 PM fltrz: HighInBC: I think I will go with your Teflon idea
02:54 PM HighInBC: test on a small scale first
02:54 PM HighInBC: and probably low temp solder is better
02:55 PM CaptHindsight: 100% solid ptfe, where did you find that?
02:56 PM HighInBC: no idea
02:56 PM HighInBC: I have seen ptfe moulds though
02:57 PM fltrz: HighInBC: suppose I have thin plates of teflon in which I drill (say thickness == diameter of drill, for various sizes going down near to but not at 0.01mm) and I want to bond/stack those plates, what would be a good bonding method? without introducing say glue in the drilled holes
02:57 PM CaptHindsight: also ptfe is rarely 100% ptfe when used in solid molds
02:58 PM CaptHindsight: ptfe is a family vs pure ptfe, but the same name gets used for both
02:59 PM HighInBC: wow, not only did they not make a hole for the registration pin of the rheostat, but they did not even bend it back
02:59 PM HighInBC: so the whole thing sat at a slant and could not be tightened
02:59 PM CaptHindsight: fltrz: why ptfe?
03:00 PM HighInBC: fltrz: my idea may not be the best it seems
03:01 PM fltrz: CaptHindsight: any material that would not stick to solidified pewter/solder, and is soft enough for machining, yet rigid enough to hold shape
03:02 PM fltrz: CaptHindsight: my original plan was aluminum
03:02 PM CaptHindsight: why did you change?
03:02 PM fltrz: ptfe was softer?
03:03 PM CaptHindsight: bonding ptfe is not a good way to go, you're better off starting with a solid and cutting it down vs laminating
03:03 PM fltrz: also not sure about if surface speed for ptfe-style plastics perhaps lower than for aluminum?
03:04 PM HighInBC: might be a toxic fume issue milling ptfe too, not sure
03:04 PM fltrz: CaptHindsight: I am keeping the option of laminary molds vs solid molds open
03:04 PM fltrz: yeah ptfe is supposedly not very healthy in general
03:04 PM CaptHindsight: Loctite, and 3M have DP8005 and 3030 for bonding ptfe
03:05 PM suavesteve: I work with PTFE regularly - milling it is no issue, certainly no fumes, etc; as CaptHindsight says, though, bonding it is a complete pain!
03:06 PM fltrz: CaptHindsight: the laminary molds was basically to ease vertical symmetry (i.e. drill all the way through), and also because there would only be 3-5 layers max
03:06 PM CaptHindsight: if you burn ptfe it causes flu like symptoms
03:06 PM MarcelineVQ: pewter molds? you makin warhammer models?
03:06 PM CaptHindsight: something like >475F
03:06 PM fltrz: so 1 parting plane vs 3 or 4... pff
03:06 PM CaptHindsight: if inhaled
03:07 PM suavesteve: I've never managed to burn it - even when I worked as a chemist, we'd run reactions at ~300C in PTFE tubes
03:07 PM suavesteve: *PTFE lined tubes
03:07 PM CaptHindsight: not cheap http://reltekllc.com/productlist/teflonbondingkit.aspx
03:07 PM fltrz: suavesteve: thanks for the comment
03:08 PM fltrz: I was thinking less fumes, more inhaling microparticles
03:08 PM CaptHindsight: I'd have to see the application to make a recommendation
03:08 PM suavesteve: In terms of toxicity, it's the breakdown products that are an issue
03:09 PM suavesteve: The solid material is fairly inert, unless you're working with flouro-solvents, strong bases or flourine
03:09 PM fltrz: is there some place to upload openscad file? I could show the WIP phalanxes, you'd immediately see how the parts are designed for manufacture by laminary molds
03:10 PM XXCoder: fltrz: since its text, dpaste.com or any text paste
03:19 PM fltrz: http://dpaste.com/3310EJ3 it shows just one non-terminal phalanx, to view a hand for example: recomment the non-terminal phalanx in the PARTS section and uncomment palm2distal() at the CONSTRUCTS section (constructs are made of multiple parts)
03:22 PM fltrz: its a bit of a pile of crap I know
03:22 PM XXCoder: meh better than I can do lol
03:24 PM CaptHindsight: I don't think I have anything installed to view openscad files
03:25 PM HighInBC: I just use openscad to view them
03:25 PM fltrz: yeah, and somethings wrong with my openscad install, it renders incorrectly (surfaces dissapearing under certain angles, and sometimes crashing openscad style)
03:28 PM HighInBC: I like the language, but the editor has room to improve
03:30 PM fltrz: if someone feels like collaborating on the micromanipulator feel free
03:31 PM fltrz: I would start with thickness/diameter parameter 1mm or 0.5mm
03:32 PM CaptHindsight: whats the length of that part?
03:32 PM fltrz: actuation probably fine gauge copper "magnet wire", or fine nylon thread
03:33 PM fltrz: then use those hands to assemble smaller parts for next iteration
03:33 PM CaptHindsight: where does the contact with solder come into play?
03:34 PM fltrz: CaptHindsight: thats just for making metal parts, and I didnt want the solder to stick to the mold, so I can reuse the mold more often, and easier to release parts
03:35 PM fltrz: so I instantly thought aluminum, since the corundum of oxidized aluminum at the surface prevents the solder alloying with the aluminum at the surface
03:35 PM CaptHindsight: you're molding solder?
03:36 PM fltrz: filling the mold with solder?
03:36 PM fltrz: like how tin soldiers were once made in metal molds?
03:36 PM CaptHindsight: I'm lost
03:36 PM fltrz: the final part is solder, the mold is machined aluminum
03:36 PM CaptHindsight: not sure what you're molding, machining or making
03:37 PM CaptHindsight: where does the ptfe come in?
03:37 PM fltrz: the idea is machine the aluminum molds once, so I can repeatedly use these molds for casting solder
03:37 PM fltrz: the parts of the hands will be pewter/solder
03:37 PM fltrz: CaptHindsight: thats a potential alternative for the aluminum
03:38 PM fltrz: so the molds are either aluminum or ptfe
03:39 PM CaptHindsight: https://www.smooth-on.com/tutorials/casting-pewter-mold-max-60/preparing-mold-for-pewter-casting/
03:41 PM fltrz: CaptHindsight: I don't want to create a new mold for every part of every hand I make? the eventual idea is to produce more and more hands, i.e. filling a small box with 10x10x10 hands, or 1kHand
03:41 PM fltrz: with microscopes or whatever
03:41 PM CaptHindsight: talc as a mold release
03:42 PM fltrz: I'm worried about properly applying talcum powder in these tiny molds, or filling a corner too much at smaller and smaller scales
03:43 PM fltrz: if the release was 'automatic' like solder not bonding with aluminum, I don't have to worry about applying mold release things
03:44 PM fltrz: for a tin soldier who cares if the soldier has a smaller nose because a little too much talc was in molds 'nose' cavity, but for mechanical parts i'd prefer no release for fidelity
03:46 PM CaptHindsight: I want a hand held automatic tapping device for up to 3/8-16
03:47 PM CaptHindsight: even better if it just aligns itself and I don't have to hold it
03:49 PM CaptHindsight: a money tree would be even better, but I'll settle for the tapper
04:04 PM gloops: sound like you need steel molds
04:22 PM fltrz: oh, but solder would stick to steel?
04:23 PM fltrz: aren't the leads of electronic components made of steel?
04:24 PM fltrz: another advantage of the teflon molds would be their low thermal mass/conductivity?
04:28 PM CaptHindsight: yes, let us know how it works out
04:37 PM Deejay: gn8
05:20 PM Tom_itx: yay! toys.
05:37 PM JT-Shopp: got your mb?
05:37 PM JT-Shopp is now known as JT-Shop
05:37 PM Tom_itx: just a bit ago yeah
05:37 PM JT-Shop: cool
05:37 PM Tom_itx: did a backup last night
05:38 PM JT-Shop: got all the posts in, working on the top tubes and tension wires now
05:38 PM Tom_itx: is this their play area?
05:38 PM Tom_itx: or just a 2nd safety net
05:38 PM JT-Shop: yea the chicken compound lol
05:39 PM JT-Shop: this is the primary safety net
05:39 PM Tom_itx: yeah
05:39 PM Tom_itx: i just didn't know if you let them roam further out or not
05:39 PM JT-Shop: well at night they are inside the varmint proof coop
05:39 PM Tom_itx: in the danger zone..
05:39 PM JT-Shop: yea they can free range with supervision and a AR-15
05:40 PM Tom_itx: some ppl moved in couple doors down with some chickens
05:40 PM Tom_itx: had a possum in the back yard couple nights ago
05:40 PM Tom_itx: it's like a free food invite
05:40 PM JT-Shop: I've still not caught the 3rd possum I saw on camera
05:40 PM Tom_itx: this one was young
05:41 PM * JT-Shop goes back to the fence...
05:46 PM mrme_ is now known as mrme
06:18 PM zeeshan: howd
06:18 PM zeeshan: HOWDY!
06:26 PM HighInBC: yo
06:34 PM BeachBumPete: https://www.facebook.com/metalhammer/videos/10155692107189764/ This may well be the most impressive thing I have ever seen jeez...
06:55 PM Crom: My prayers to all those in the body slam called Irma!
06:56 PM CaptHindsight: BeachBumPete: ever seen/heard of these guys playing together? PACO DE LUCIA , John McLaughlin , AL DI MEOLA https://www.youtube.com/watch?v=9cadbYIzhqQ
07:02 PM zeeshan: BeachBumPete: windows boarded up?|
07:03 PM Crom: i was calling my broker this morning... NO idea irma was a thing... He's in Ft Lauderdale (well now he's somewhere else until after the storm....)
07:04 PM BeachBumPete: CaptHindsight no I have not... gotta check it out..
07:04 PM BeachBumPete: zeeshan yeah man we are all covered in metal LOL
07:05 PM Crom: I'm hearing different storm surges.. 9' here 12' there... I don't want to be anywhere near FL.
07:07 PM BeachBumPete: I can't believe how good that kid plays
07:08 PM CaptHindsight: BeachBumPete: also Steve Morse, Joe Satriani https://www.youtube.com/watch?v=obzwkSQcsAA
07:09 PM CaptHindsight: BeachBumPete: kinds sad Marcin Patrzalek 60k views, taylor Swift 60 million
07:10 PM BeachBumPete: thats not sad that's freakin' tragic
07:12 PM CaptHindsight: if they ever tour again they are definitely worth seeing
07:17 PM CaptHindsight: BeachBumPete: you might also like https://www.youtube.com/watch?v=o6rBK0BqL2w
07:17 PM CaptHindsight: she's 17 ^^
07:19 PM BeachBumPete: and to think I can't even teach myself to play simple chords on my damn takemini
08:05 PM fltrz: suavesteve: as previous chemist, would a carbon fiber strand (i.e. a single tow extracted from "60k" carbon fiber) burn to CO2 at say 250 deg C? in contact with molten solder?
08:07 PM fltrz: I might want to use them as 'tendons'
08:14 PM sync: no
08:45 PM CaptHindsight: carbon fiber 60k
08:47 PM CaptHindsight: the carbon won't burn but any resins in or on it will
09:04 PM CaptHindsight: i wouldn't cast CF into solder. I'd leave areas to thread it through.
09:05 PM CaptHindsight: or drill holes after casting
09:26 PM fltrz: there's often resins in CF tows?
09:28 PM fltrz: for guiding wires of the more distal (finger tips) segments, id prefer internal channels/guides above surface channels, but perhaps permanent attachment point of the tendons could be soldered in?
09:30 PM fltrz: not sure how to produce the channels, am still considering different ways of having channels (keep in mind I wont eventually have means for drilling channels, as I wish to explore the limit, i.e. the drill sizes will be the thickness of the plates
09:32 PM fltrz: perhaps if I keep the CF in motion, sliding back and forth along its length while the solder solidifies
09:32 PM fltrz: to ensure I can remove them when the solder is cold? then perhaps another carbon fibre and some abrasive powder to widen the channel?
09:44 PM fltrz: hmm CTE of solders is 23ish ppm/C while transverse CTE of CF is 5ish ppm/C so the CF might get stuck (desirable for mounting the end of the tendon into the part, but not for forming a channel
09:45 PM fltrz: I think I'll use surface channels/guides, and stick a strip of protruding aluminum foil just over the edge between layers in the mold?
09:46 PM fltrz: alternatively seek a material that is available in thin gauge wire form, but has a higher CTE than solders
09:59 PM fltrz: ptfe has CTE 80 ppm/C :)
10:15 PM Wolf__: fun… where to find metric 1.25 pitch gears
10:20 PM Crom: My Mesa boards were delivered today
10:20 PM Wolf__: yay
10:33 PM Wolf__: so get it hooked up yet?