#robotics Logs

Dec 04 2014

00:11 rue_shop4 RifRaf, I have ... distorted cubes?
00:12 rue_shop4 but they are in 1 peice
00:12 rue_shop4 right now I'm learning why I cant print at 300% speed
00:13 rue_shop4 first print was great
00:13 rue_shop4 then I started working on making them worse
00:14 rue_shop4 my head is leaking too
00:14 rue_shop4 have to put a grommet in it
00:14 orlock we buy tablets for that
00:14 orlock called antihistamines
00:14 orlock but i dont think thats what you meant
00:14 orlock and i dont think you need them in canada at this time of year
00:14 orlock :)
00:14 orlock fuck hayfever
00:16 rue_shop4 umm what happens if it eats the tail of the filament?
00:18 rue_shop4 haha so close
00:21 rue_shop4 ok ... thats not good
00:22 rue_shop4 I'll have to take the extruder off again to get that piece of filament out...
00:22 rue_shop4 oops
00:23 rue_shop4 ok , it printed, yay
00:23 rue_shop4 supper, bed
00:37 RifRaf yay
00:38 RifRaf hopefully you were able to push it through with another piece
00:43 rue_more no, the end wasn't flush
00:43 rue_more knowledge++
00:44 RifRaf so the extruder extruded?
00:44 rue_more yes
00:44 rue_more I'll post image
00:44 RifRaf cool
00:46 rue_more http://ruemohr.org/~ircjunk/projects/reprap/p1060918.jpg
00:47 rue_more it started good and got worse as I dialed the speed up to 300%
00:47 rue_more and then I moved over to .5mm layers and took the speed back down to 100%
00:47 RifRaf heh, but thats good to see something, they seem pretty thick for a 0.5mm part
00:48 RifRaf maybe over extruding a bit
00:48 rue_more the nozzel cant keep up with 300%
00:48 rue_more with a multiplier of 4
00:49 RifRaf yep thats one of the issues with big nozzles i was telling you about
00:49 rue_more no worries for me
00:49 rue_more I'm also having Z zeroing issued
00:49 rue_more issues
00:49 rue_more not sure how, the the zero creeps up
00:49 RifRaf heat?
00:49 rue_more no
00:50 rue_more its like it loses a few counts after every print
00:50 RifRaf slow Z down
00:50 rue_more I'm also not sure if the z sensor is triggering in the same place every time
00:50 rue_more its optic, it should
00:50 RifRaf it won't 100% but near enough
00:50 RifRaf oh
00:51 RifRaf well then you have no excuses
00:51 rue_more yea, not sure
00:51 rue_more it'll be part of the learning
00:51 rue_more thats the cube, so obviously there are scaling corrections
00:51 RifRaf yeap, getting printing is only the start, you have lots to learn now :)
00:51 rue_more can you suggest a spool holder?
00:52 rue_more oh, one of those is .5mm layers
00:52 RifRaf yeah mine
00:52 rue_more :)
00:52 RifRaf but you'll need to be able to cnc it
00:52 rue_more didyou scratch design or modify?
00:52 rue_more ah
00:52 rue_more my cnc pissed me off, its on the shelf now too
00:53 RifRaf i am sure you can make one from a few bits of stuff if i show you the idea
00:53 rue_more oooh
00:53 rue_more I'll bet... the carrige dosn't land right when it goes down
00:54 rue_more there are two nuts, the bottom one to hold the carrige up, and one over a spring to hold the carrige down
00:54 rue_more which would explain why the first few layers aren't right
00:54 rue_more its picking up the slop
00:59 RifRaf http://imgur.com/Iug2jFP
01:00 RifRaf just add more bearings and you can fit 2 of the standard skinny spools on it, rolls on bears with big washer things to keep it on the bearings
01:02 RifRaf yeah i just fixed up my sloppy hot end before that has been giving me bad prints for ages, finally got sick of it
01:05 rue_more if I add an O ring into it, it'll work
01:05 rue_more I'm pretty sure it wont have issue with the heat
04:15 m_itx thinks rue_shop4 looks funny with a grommet in his
07:21 bezoka hello
07:26 bezoka rue_more: are you here?
09:18 rue_more always
09:22 rue_more sometimes I'm just asleep or at work
09:28 rue_more or too busy playing to talk
19:02 orlock picked up my hobbed bolt last night
19:03 Tom_itx you got no excuses now!
19:15 Rif orlock, which type?
19:17 orlock Unsure, it seemed a reasonably shallow profile
19:17 orlock the bolt had a black coating
19:20 Tom_itx don't lick it
19:20 Rif black like a cheap chinese one? rough hobbing?
19:21 Rif and its slightly less than 8mm diameter?
19:22 orlock number on the head of the bolt said 8.8 from what i remember
19:22 Tom_itx no star configuration?
19:22 Tom_itx that indicates it's hardness
19:22 orlock i dont remember what it was
19:23 Rif only black ones i have were from china, and i gave em bad feedback cause they were crap
19:23 orlock Sounds right
19:23 orlock All the rods came wrapped in chinese newspaper
19:24 Rif good a good camera?
19:24 Rif got*
19:24 orlock dont have bolt on me
19:24 Rif take pic of hobb if you can. i'll know if its the same
19:24 orlock ok
19:24 Rif ok, when i get home will post a picture of the differences
20:33 rue_more ok
20:36 rue_more ok
20:46 rue_more orlock, now I'm waiting for pictures too
20:46 rue_more orlock, I got a print out of my machine!
20:47 rue_more ok I dont want spagetti
20:49 rue_more dont really want burritos
21:09 rue_more I suppose I should start fixing the reprap
21:10 rue_more I feel priveledged to have started the eternal step
21:11 rue_more I'll take the head apart, remove the stupid peice of filament
21:11 rue_more put in a gasket
21:12 rue_more see if the Z axis is seating properly
21:12 rue_more RifRaf, ?
21:13 rue_more man, gettin a raprap partner is hard
21:16 RifRaf hello
21:16 rue_more you around to help me out for a bit?
21:16 RifRaf yep
21:23 RifRaf http://i.imgur.com/tXniONG.jpg
21:24 RifRaf orlock, what one is like yours?
21:24 orlock Bottom
21:25 orlock the cuts could be a bit cleaner though
21:25 orlock but def. not like the top two
21:27 orlock Rif: assuming thats the cheap chinese ones then?
21:27 RifRaf yep, won't be all that reliable but will get you going, the middle is the learcnc one i'd recommend
21:27 orlock the vendor said he had seem some problems with ovalness, or wearing into an oval shape?
21:28 RifRaf well the shaft of the bolt is about 7.8mm not 8mm so does not seat the bearings properly, is crap, change when you can
21:29 orlock ahh
21:29 orlock ok, will check with calipers
21:34 rue_more I made mine out of a black bolt, but its better than that one
21:35 rue_more RifRaf, that top one is interesting
21:35 rue_more special cutter
21:35 rue_more RifRaf, top one is for 3mm I take it?
21:35 Tom_itx https://www.youtube.com/watch?v=Pe2RACwiEbg&feature=youtu.be
21:35 rue_more middle would be 1.75?
21:35 Tom_itx ^^ when you're back in the cnc mood...
21:36 rue_more cute
21:36 rue_more the whine is gonna turn my head inside out tho
21:36 Tom_itx no sound here
21:37 Tom_itx except the bearings on the cpu fan
21:37 rue_more oh its the stepper driver pwm
21:37 rue_more outch
21:42 rue_shop4 ok
21:42 rue_shop4 oh the test cube is only supposed to be 10mm high
21:43 rue_shop4 its supposed to be 22.5mm?
21:43 Tom_itx i thought it was a 1" cube
21:43 rue_shop4 not sure
21:43 Tom_itx that's 25.4mm
21:43 rue_shop4 slicer says 22.5
21:44 rue_shop4 RifRaf, ?
21:44 Tom_itx actually it probably isn't since the reprapper nuts are all metric
21:45 RifRaf sorry was busy
21:45 RifRaf about 22mm is correct
21:46 RifRaf and about 10mm high sounds right, is just a very quick test, time to move on
21:46 RifRaf print a robot friend for my 2 pink robots
21:47 RifRaf doing a small one now at 75%, just in clear at 0.15mm layers
21:50 rue_shop4 I have to fix the leaking head
21:57 rue_shop4 Triffid_Hunter, dont say much anymore
21:59 rue_shop4 11.5mm high
22:00 RifRaf try the 20mm cube now and worry about measuring
22:00 rue_shop4 I want to get the height right
22:01 RifRaf next object!
22:01 RifRaf till you get your first layer height right things won't be perfect in overall hieght
22:02 rue_shop4 oh
22:04 rue_shop4 whats the next test to do
22:04 rue_shop4 I have to fix the head...
22:04 RifRaf you have already calculated your Z steps anyway and is not out by a factor of 2 or more so all is well, would be a microstepping issue if you were out that much
22:04 RifRaf 20mm cube, lets try bottoms infill and top
22:04 RifRaf we know you can do walls
22:05 rue_shop4 its 1600 by the math
22:05 rue_shop4 I had between 1750 and 1500
22:05 rue_shop4 I have to get the peice of filament out
22:05 RifRaf different answers?
22:06 RifRaf thats was 8 hours ago
22:06 RifRaf undo hotend, warm up and pull out
22:06 rue_shop4 the scrwes are a nightmare
22:07 rue_shop4 heating up head now...
22:13 rue_shop4 I lost the drawr of gaskets...
22:20 rue_shop4 ok I was able to unjam the filament
22:21 rue_shop4 RifRaf, does water in the plasic casue bubbles?
22:22 rue_shop4 if I extrude <a bunch> I get bubbles in the poo
22:23 rue_shop4 20mm cube
22:23 rue_shop4 er, 1 more thinwall
22:31 rue_shop4 OOPS the fan wasn't going, I wonder if I just clogged it
22:31 rue_shop4 hahahahhaah
22:31 rue_shop4 crap
22:31 Tom_itx you gotta keep the raw material moisture free silly
22:33 RifRaf pla absorbs moisture yes
22:33 RifRaf or you may be too hot
22:34 orlock yum , mine came shrink wrapped with packs of slica gel dessicant stuff in there
22:34 rue_shop4 crap
22:34 rue_shop4 the fan wasn't on
22:34 rue_shop4 damn
22:34 rue_shop4 I have to take it all apart again
22:34 RifRaf :/
22:34 RifRaf maybe that hotend design needs refining
22:35 rue_shop4 what do yo uthink I shoudl change?
22:39 rue_shop4 whats the procedure if yours cloggs up?
22:39 rue_shop4 you have a J head, right?
22:45 RifRaf similar, using aluhotends at moment
22:46 RifRaf i rarely get clogs these days, and a bit of copper wire poked into hot nozzle usually fixes it
22:46 RifRaf if not then do the filament unclogg method, pulling out at the right temp
22:46 rue_shop4 ok try that again
22:46 RifRaf and if that fails chuck it in acetone for a few days and then check hole and start again
22:46 rue_shop4 what happens if your fan fails?
22:47 RifRaf with abs i use no fan
22:47 rue_shop4 ah
22:47 RifRaf i do though is doing filament swapping
22:47 rue_shop4 ever used pla?
22:47 RifRaf nope, i do have a roll somewhere though
22:47 rue_shop4 ah
22:47 rue_shop4 does abs fume as much as they say it does?
22:47 RifRaf nope
22:48 rue_shop4 huh
22:48 rue_shop4 thats why I got pla
22:48 rue_shop4 "not toxic"
22:48 RifRaf i cannot smell it nor does my housemate care about it
22:48 RifRaf if i walk into a closed up roll when printing i can notice it for a second or so, but i am in a closed up room with a printer going now
22:49 RifRaf don't like drafts
22:49 RifRaf closed up room*
23:05 rue_shop4 yea, thats MUCH better when spare plastic isn't leaking out the side of the head onto the print
23:05 rue_shop4 and then getting ground in
23:07 rue_shop4 ok thats better, my z is still out, tho I'm suspicious of the hardware
23:07 rue_shop4 the 22.5mm is 24mm
23:07 rue_shop4 ok cube
23:08 rue_shop4 20mm box?
23:08 rue_shop4 RifRaf, ?
23:15 rue_shop4 well if I ever imagined overextrusion, thats it
23:19 rue_shop4 ugh, wow
23:21 rue_shop4 I'm confused the .5mm box worked so wel
23:22 RifRaf hello
23:22 RifRaf i told you it was overextruding when i saw your first parts
23:23 RifRaf is hard to not get a 1/2 decent result with the 0.5mm test
23:23 RifRaf thats why its a satisfying first print
23:23 RifRaf over you add multiple walls and other stuff is when you start seeing issues
23:24 RifRaf when*
23:29 rue_shop4 ah
23:39 rue_shop4 hmm I recon the cube is supposed to be.... a cube?
23:39 rue_shop4 its a bit short for a cube
23:40 rue_shop4 20.48x19.91x10
23:40 rue_shop4 so, the z scale is out by 50%
23:40 rue_shop4 hmm
23:41 rue_shop4 wait, 20x20x10?
23:41 rue_shop4 does that mean its right?
23:44 RifRaf yeah
23:44 rue_shop4 cool, but its unerextruded...
23:44 RifRaf guess thats not a cube but watever
23:45 rue_shop4 technically, the file says box...
23:45 RifRaf k
23:45 rue_shop4 :)
23:45 RifRaf any new images?
23:45 rue_shop4 I'll make lots of these, how much are they worth on ebay?
23:45 rue_shop4 oh I'll go get camera
23:45 RifRaf heh
23:47 MjrTom if its about 20x20x10 and it should be 20x20x20, does that mean it's half decent?
23:59 rue_shop4 MjrTom, half descent?
23:59 rue_shop4 RifRaf, this reveals a few problems, like the max machine feed rate for the extruder is way too high