#robotics Logs

Dec 16 2014

00:36 RifRaf hi
00:43 rue_more '[e
00:44 Jak_o_Shadows ][
01:48 armyofevilrobots rue_more: SOme distraction before bed: http://www.3ders.org//articles/20141215-marvell-announces-first-fully-integrated-3d-printer-system-on-chip-solution.html
09:22 rue_more mmm
12:08 Solarlux Hello all
12:08 Solarlux Where can i find mechatronics simulatorsoftwares
12:08 Solarlux Or some practical
12:09 Solarlux Material
12:09 Solarlux For industral robots
18:01 GuShH real life is your best simulation
18:01 ShH hides behind rue_
18:08 GuShH rue_more: check out this metal spinning lathe https://lh6.googleusercontent.com/-0TuRtyFwVhY/VI6IRyUBWcI/AAAAAAAAA1I/1ySIXJOWwxk/w958-h716-no/image1.jpg
18:08 GuShH very similar to shorty!
18:08 GuShH of course I don't have the toolpost for spinning or wood work
18:09 GuShH but, so far it matches the castings
18:09 GuShH except for the headstock height
18:09 GuShH but that is an older version
18:10 GuShH could be a DENN, made in Spain.. they've been in business since 1885.
18:11 GuShH guy estimated the bed with the legs alone are close to 400KG
18:29 rue_more ooo
18:29 rue_more lets see yours?
18:30 GuShH rue_more: you mean an update? no pics yet
18:30 GuShH if it doesn't rain tomorrow I'll work on it for a few hours
20:19 lock is gone (01:02PM): (automatically dead -
20:54 rue_shop3 so, it turns out my green filament is horrible
21:00 Tom_itx wet?
21:00 Tom_itx or just cheap sheet?
21:12 armyofevilrobots yes, please, details :)
21:25 rue_shop3 ok, I cant work out how they THREAD a wire drawing machine
21:25 rue_shop3 how do you get the wire in the die if it dosnt fit?
21:25 rue_shop3 armyofevilrobots, its occured to me that If my idea works I can start by taking 3mm filament and making 1.75
21:28 RifRaf pilot hole
21:28 RifRaf you talkin about wire edm?
21:29 RifRaf oh no you are not, filament making eh
21:29 rue_shop3 no, wire drawing, they pull wire thru a die to make it smaller
21:29 orlock metal/wire is malleable - filament is more brittle
21:29 RifRaf guess you would need a thinner end to start
21:31 rue_shop3 brittle, seems to suish out an extruder pretty good
21:34 rue_shop3 its done with sub-mm wire, so its not a matter of just shoving it in
21:44 rue_shop3 ok you tube is just confusing this, they insert the large material itno the small hole enough to grab it and pull...
21:55 Tom_itx https://www.youtube.com/watch?v=7N7IrSaxzg4
21:55 Tom_itx i've seen that process first hand
21:56 rue_shop3 I dont think the insulation process is accurate enough
21:57 rue_shop3 I think it'd need to be dawn to size
21:58 Tom_itx https://www.youtube.com/watch?v=Lc6jhitcu7Y
21:59 Tom_itx i don't understand all the rollers
22:01 Tom_itx i bet that's a bitch to thread the first time
22:02 rue_shop3 ok, the bed needs 13.5V at 8A
22:02 rue_shop3 thats what '
22:02 rue_shop3 I'm trying to work out
22:02 rue_shop3 how do you get the wire thru the dies the first time around?
22:02 rue_shop3 esp if its .08mm small
22:02 rue_shop3 2 part dies would make sense, but I dont see any evidence of split does
22:03 Jak_o_Shadows That's a lot of rollers just at the start
22:03 Jak_o_Shadows albeit one is tensioning
22:03 Tom_itx does each one stretch it a bit more until it's at it's desired diameter?
22:05 Jak_o_Shadows stretch while heated?
22:05 Tom_itx heated to some degree i suppose
22:05 Tom_itx https://www.youtube.com/watch?v=ab7MrBbWXCw
22:05 Tom_itx that's how he does it
22:06 Jak_o_Shadows I wonder if the water baths at the extrusion end are heated
22:06 Tom_itx i don't think so however i'm sure they're temperature controlled
22:06 Jak_o_Shadows Probably not, they don't seem insulated
22:11 armyofevilrobots rue_shop3: Tomorrow is my last day of work before Jan :) We should build a filastruder.
22:11 rue_shop3 heh
22:12 Tom_itx http://www.jennchong.com.tw/product_i_mono_jc_mnp.html
22:12 Tom_itx same basic roller set
22:12 rue_shop3 I hav a gift certificate for the habitat for humanity shop, I was gonna pick up an ogger
22:12 Tom_itx auger
22:12 orlock auger?
22:13 Tom_itx rue's spellchecker
22:13 rue_shop3 :)
22:13 Tom_itx that first one is the best example i can find so far
22:14 Tom_itx pour it into a coolant solution and draw it thru rollers to size
22:15 rue_shop3 hmm, only about 77W, but its getting hot
22:15 Tom_itx on that large machine i suppose the first 50' or so would be waste
22:15 rue_shop3 armyofevilrobots, whats your plate wattage again?
22:15 Tom_itx the waste is very likely reground and recycled
22:16 Tom_itx if you run it 24/7 you only gotta thread it once
22:16 Tom_itx automatic spool loader on the far end
22:16 Tom_itx keeping new spools loading filament
22:17 rue_shop3 'cant make it to work today, have to keep the spools going'
22:17 Tom_itx stop messin around with toys and make a real one
22:17 Tom_itx automatic spool loader
22:17 Tom_itx silly
22:17 Tom_itx you can't sense when a spool is full and have your arm9 change it out????
22:18 Jak_o_Shadows sensing would be reasonably easy surely
22:18 Tom_itx by weight or spool thickness etc
22:18 Tom_itx or a counter on the final pulley
22:19 Jak_o_Shadows aha, counter would probably be easiest.
22:19 rue_shop3 hahah, 1kg on arm9
22:19 Jak_o_Shadows For weight, what, a strain guage on the rod, then some basic stress analysis to convert that to weight?
22:21 Tom_L https://www.youtube.com/watch?v=2HxO-PLAJtM
22:21 Tom_L multi strand for brooms
22:21 Tom_L the rollers progressively stretch it
22:22 Tom_L watch the far ones turn faster
22:22 Tom_L somebody shoot the video guy though
22:22 Jak_o_Shadows the home filament extruders mostly just use a die don't they.
22:23 rue_shop3 no they do a controlled stretch of the filament
22:23 rue_shop3 while its hot
22:23 Jak_o_Shadows ah
22:23 Tom_L https://www.youtube.com/watch?v=ZycrR5KxPTI
22:23 Tom_L ABS filament for 3d printing machines
22:25 Tom_L https://www.youtube.com/watch?v=40HOAsUnSQ8
22:25 rue_shop3 hmm, having a problem getting the table over 78W
22:25 Tom_L ABS, PLA filament for 3d printing machines
22:27 armyofevilrobots rue_shop3: 120W.
22:28 rue_shop3 hmm
22:28 rue_shop3 my next best transformer is 24V
22:28 armyofevilrobots I gotta admit, I am tempted by http://www.alibaba.com/product-detail/20-20cm-500W-110V-Powerful-Silicone_1936563290.html
22:28 rue_shop3 would try to push 13A thru 30 guage wire
22:29 rue_shop3 I dont know what the fusing current is
22:29 rue_shop3 armyofevilrobots, lookada plug, that things huge
22:30 armyofevilrobots 20x20cm. exactly the right size!
22:30 Tom_L https://www.youtube.com/watch?v=8mqCHQSSxNs
22:30 armyofevilrobots Heh, I just watched that last week. Very good experimental fail.
22:31 Tom_L you need the water bath though
22:31 armyofevilrobots I dunno. Lots of filastruders seem to work fine without it.
22:31 rue_shop3 ah, they ahe a million sizez
22:31 armyofevilrobots but yeah, a water bath helps.
22:32 Tom_L on the production ones, the final rollers determine the diameter
22:32 armyofevilrobots Man, I love the rube-goldbergyness: https://www.youtube.com/watch?v=Lc6jhitcu7Y
22:32 armyofevilrobots It's neat how far down the path of diminishing returns industrial processes can go sometimes.
22:35 rue_shop3 if I use a diode I get 160W
22:36 rue_shop3 wow I hate slow videos
22:36 Tom_L that last one uses gravity to pour the plastic into the coolant
22:37 Tom_L well, gravity and force out the nozzle
22:37 Tom_L keeps it more uniform than a horizontal one
22:37 e_shop3 shakes
22:37 rue_shop3 300+ years of wire making technology and the kids know nothing about it
22:38 Tom_L why are you searching for wire pullers?
22:38 Tom_L you're not making wire
22:39 rue_shop3 yep, plstic wire
22:40 Tom_L https://www.youtube.com/watch?v=CoNKWHYEJLI
22:40 Tom_L that one looks like it melts it first before extruding it
22:41 Tom_L not sure what that one's for
22:43 Tom_L http://3dprintingforbeginners.com/how-to-make-diy-filament-for-your-3d-printer/
22:43 rue_shop3 ok thats 95W
22:44 Tom_L that uses a modern bit
22:45 Tom_L http://3dprintingforbeginners.com/wp-content/uploads/2014/05/Filament-Extrusion-Process.jpg
22:46 Tom_L the process in a nutshell
22:47 rue_shop3 yea, full out its barely 90c
22:48 Tom_L seems easy enough
22:48 Tom_L what are they using for a heat element for the extruders?
22:49 Tom_L i guess maybe i'll have to make one
22:55 rue_shop3 oo there 170W
23:00 rue_shop3 ok, its up to 120c, I'll call it success
23:00 rue_shop3 hmm
23:00 rue_shop3 maybe I'll use a triac on that one
23:00 rue_shop3 w/opto
23:00 rue_shop3 wonder if I should do that on the low or high voltage
23:01 rue_shop3 15A on the low side
23:05 rue_shop3 ok, maybe tommorow I can put the new bed on
23:57 rue_more armyofevilrobots, wow, these scans are evil
23:58 rue_more I think I'll have to take it down to a point cloud and recontruct the interconnections
23:59 rue_more I think I wrote something for doing that
23:59 rue_more long long ago