#linuxcnc Logs

Dec 16 2019

#linuxcnc Calendar

03:17 AM Deejay: moin
03:48 AM Loetmichel: *hrrrmpf* THAT happens if you make your "CAD" in coreldraw8... just trying to get an old design of a keyboard into MoI (3d modeller)... Corel cant export arcs, so each and every of those 100++ drills are octagons. not to mention the factor 25.4 corel makes the DXF to small :-( *redrawing every circle and arc*... :-(
04:40 AM p0g0: wow, I haven't seen Coreldraw in service since WordPerfect days, I recall it was an early Wine port to Linux, like 20 years ago or more.
04:53 AM mr_boo: what CNC would you recommend for making circuit boards and some metal parts?
04:54 AM p0g0: PCBs?
04:54 AM p0g0: It is so very cheap to hire a fab house, I cannot imagine it is anything but a hobby to make you own any more.
04:54 AM syyl: a datron m10?
04:55 AM syyl: or order pcbs from jlc pcb ;)
04:55 AM syyl: cost about close to nothing
04:55 AM mr_boo: i'm planning to make some front panels with the CNC also
04:57 AM mr_boo: i've been thinking of this http://www.stepmores.com/index.php?m=content&c=index&a=show&catid=31&id=47
04:57 AM mr_boo: just wondered if there would be a better option somewhere
04:57 AM syyl: i have that machine
04:58 AM syyl: i would not buy it for the full price
04:58 AM syyl: i think its close to 5keur new
05:01 AM mr_boo: what are the drawbacks of it?
05:01 AM syyl: geometric accuracity is meh
05:01 AM syyl: needs quite a bit of squaring
05:01 AM mr_boo: ouch
05:01 AM syyl: the stepper drives are crazy loud
05:02 AM syyl: apart from that, its a nice machine
05:03 AM Tom_L: morning
05:03 AM syyl: but i paid only 1keur
05:03 AM mr_boo: for the price it costs i would certainly expect premium accuracy and precision
05:03 AM Tom_L: 24F, Lo 19
05:03 AM Tom_L: snow.
05:03 AM syyl: premium starts at 20x the price ;)
05:03 AM XXCoder: reminds me of that joke where guy goes into LOOOONG rant about sucky thing is, then says "other than those, its nice one"
05:05 AM syyl: well, it has a cast frame, 15mm linear rails, decent ballscrews and a 2,2kW hf spindle
05:05 AM syyl: and no moving gantry
05:05 AM XXCoder: mr_boo: what kind metals? like alum or ligher like bronze
05:06 AM mr_boo: i saw a video of a guy who did cut steep with it
05:06 AM mr_boo: *steel
05:06 AM syyl: that was probably me
05:07 AM syyl: would not buy it, if i wanted to machine only steel on it
05:07 AM mr_boo: that result did look visually impressive but at a rather small scale
05:09 AM mr_boo: so one could probably find a better machine in that price range?
05:09 AM syyl: it depends ;)
05:11 AM mr_boo: i was first thinking of making me a CNC but i also realize how hard it would be to make it precise
05:12 AM mr_boo: also making one would take forever shifting focus from the stuff that i want to do
05:16 AM mr_boo: but it is clear that i'd better do some research before any hasty purchase
05:17 AM p0g0: I've only worked around them, but competency is not trivial: the feeds, speeds, features and personalities of the machines, the understanding of GCodes and how to tweak them... it's a lot to get under your belt.
05:18 AM mr_boo: well precision is what i want. i don't mind if it is slow
05:18 AM mr_boo: also it can't be too loud since i'm in an apartment
05:19 AM syyl: i hear that at lot - trust me, you will get insta-pissed of a deadslow machine ;)
05:19 AM p0g0: I think it is touchier than that- the precision and repeatability sometimes means not slow, but instead the "right" speed.
05:19 AM p0g0: And yeah, slow gets old.
05:19 AM p0g0: oh, loud?
05:20 AM p0g0: yeah, good luck with that, maybe in the right enclosure.
05:22 AM p0g0: I had a client that made industrial sewing machines, they had about 20 4-8 head turret lathes, made about 10k different parts. Nothing about it was trivial, and it wasn't always a sure thing that you'd get the exact same part out of one machine as another. But loud is just part of milling metal.
05:36 AM enleth: mr_boo: FYI, you can get a Tormach for 15kUSD
05:37 AM enleth: all the (deserved) crap Tormach gets notwithstanding, this *thing* is definitely not even 1/3 as good as a Tormach
05:38 AM XXCoder: 15k tend to be outside people budgets :)
05:38 AM mr_boo: there must be a reasonable useful alternative at an affordable budget
05:38 AM enleth: it does, but it puts into perspective just how absurdly overpriced those tiny shitty milling plotter toy things are
05:39 AM enleth: if you *can* get a semi-real milling machine for ONLY 3x as much
05:39 AM XXCoder: boo honestly pcbs is easy
05:39 AM XXCoder: $120 shitrouter can do it
05:39 AM mr_boo: as with everything in this sad world it is all down to money
05:39 AM XXCoder: milling metal is where your budget will go into.
05:40 AM enleth: mr_boo: if you can get anything like that plotter for less than 1kEUR, go for it
05:40 AM enleth: anything more than that - no way
05:40 AM enleth: mr_boo: so look on ebay, for people who got bamboozled into paying the full price and now want to get rid of the thing
05:40 AM enleth: you'd have to spend a ton of time fixing and tuning it anyway, so a used one shouldn't be any worse
05:42 AM mr_boo: sounds like the stuff in this pricerange is so poor that i could just do it myself and get better results
05:42 AM enleth: yes, that's more or less the case
05:43 AM XXCoder: expecvially if you can weld steel stuff
05:43 AM XXCoder: and have metal scrap place you can get stuff from
05:44 AM mr_boo: the situation sounds pretty tragic
05:44 AM p0g0: hmm, steel is hard to mill and drill accurately.
05:45 AM p0g0: Here on the farm, the bandsaw and Damn Big Hand drill on a lever drilling thru all the parts in a stack, it's OK for farm stuff and very small lots.
05:46 AM enleth: mr_boo: it might just be that it is genuinely impossible to make a small milling plotter that doesn't suck because of material, mass and cross section limitations, and it is also genuinely impossible to make a larger, more solid machine as cheaply as you want
05:46 AM XXCoder: you can do it with steel I beams
05:46 AM XXCoder: those is quite strong
05:46 AM p0g0: I have a jeweler's lathe, good for making watches and such
05:46 AM XXCoder: guy here build machine using em and square tube'
05:47 AM p0g0: XXCoder, I have warped 5" I-Beams just by welding them...
05:47 AM enleth: XXCoder: but that gets more labor intensive compared to casting, so it wouldn't be cheap as a commercial product
05:47 AM XXCoder: en im pretty sure boo dont want to sell machine if he makes it :)
05:47 AM XXCoder: so if its cheaper way to make metal milling machine then well
05:47 AM enleth: but he'd like to buy one
05:48 AM XXCoder: cheaper but much higher labor hours
05:48 AM XXCoder: depends on what he wants at end
05:48 AM enleth: p0g0: the trick is to weld the frame in such a way that it will stiffen up instead of warping
05:48 AM p0g0: I am likely to toss small $ as a Maslow hanging plotter type CNC, 1/32" is about as good as it can do, but I'll use it as much as a large pen/scribe plotter to layout jigs.
05:49 AM enleth: p0g0: because it'll try to warp in on itself
05:49 AM p0g0: enleth- weld a rod along the length of one, and see what happens.
05:50 AM enleth: that's exactly why I wouldn't put a bead *along* an I-beam
05:51 AM p0g0: Had I know to prestress the beam and curl it down before I welded the rod, I'd have been good, or I could have tried to anneal the whole thing, or weld a rod opposite the first one, but absent those, a 20' beam will readily warp an inch or more.
05:51 AM p0g0: *known
05:52 AM p0g0: enleth, yes- and in my defense, several professional welders failed to mention the issue, and ignorance reigned.
05:55 AM enleth: I guess you could say that welding structural parts is as much about laying the bead properly as it is about managing warping
05:55 AM enleth: and half of the latter is in order of operations
05:56 AM p0g0: It takes all of that, knowing the thermal expansion co-efficients, the elasticity of the weld, the mass of metal going down...
05:56 AM p0g0: And there is no way to make a molten metal not shrink as it cools.
05:56 AM enleth: also why you tack first, then stich, then fill, going around the structure all the time
05:56 AM p0g0: So, even if you stagger the welds, that's not going to help.
05:57 AM p0g0: nope
05:57 AM enleth: *stitch
05:57 AM p0g0: that would not matter in this case, and I saw that with confidence because I did that.
05:57 AM p0g0: *say
05:58 AM p0g0: It was simply that one surface of that beam had a dual 20' strip of molten metal that cooled.
05:58 AM p0g0: That was going to shrink that surface.
05:58 AM enleth: if there wasn't another structural member placed to take the force and turn warping into tension, then sure, it wouldn't have helped
05:58 AM p0g0: Yeah, the prestressing.
05:59 AM p0g0: If I had stretched the surface in measure with the shrinkage, it would have come true.
06:08 AM mr_boo: whats the typical pricerange for the CNCs you guys use?
06:08 AM jthornton: 6-10k used
06:09 AM mr_boo: what size is the thing?
06:09 AM jthornton: bp discovery 308
06:10 AM jthornton: bp series 1 with analam 1100m
06:10 AM jthornton: hardinge chnc 1
06:11 AM mr_boo: in order to fulfill my plans i'd need such a thing but also a big workshop to be in
06:11 AM mr_boo: i don't have a lot of experience in gcoding but i've done it a couple of times
06:11 AM jthornton: the workshop came last lol
06:16 AM XXCoder: yo
06:16 AM jthornton: yo
06:17 AM mr_boo: are there any obvious risks bying a second hand CNC?
06:17 AM XXCoder: depends on its usage was before
06:18 AM XXCoder: spindle could be really shot for example
06:18 AM XXCoder: or way too old system you have to convert to linuxcnc with more modern controllers etc
06:19 AM jthornton: or it could have a "high performance" siemens drive that can't use a vfd to control the spindle
06:19 AM syyl_: or it could use fanuc hardware
06:19 AM syyl_: that nothing talks to.
06:20 AM syyl_: or shot linear rails
06:21 AM syyl_: or shot ballscrews/ballscrew bearings
06:22 AM syyl_: if you have to ask for the risks of a used cnc, better take someone who has experience with machine tool along when purchasing ;)
07:41 AM jymmmm: Good mrning folks
08:34 AM elmo40: moo
10:38 AM mr_boo: wonder what the shipping would cost for this machine https://stepmores.en.alibaba.com/product/60558191830-213264270/Hot_sale_whole_cast_structure_stepmores_400_400_mini_cnc_4040_router.html
10:59 AM BitEvil: $20 or so, if you buy a containerload.
11:17 AM mr_boo: it would be easier with a local supplier of course. having a 100kg thing shipped from china will cost
11:28 AM gregcnc: check ebay
11:33 AM BitEvil is now known as SpeedEvil
11:38 AM * jthornton sees that lunch minute is over so back to the machine shop to make that damn part again for the 3rd time...
11:38 AM * SpeedEvil passes jthornton an undo key.
12:20 PM * JT-Shop needs one it seems
12:29 PM Loetmichel: *hrrrmph* got two raspi3b+ today. one for my Anet 3dprinter, the other for tinkering. written an octopi image on one, testing: all is well. written an raspibian on the second, connected: no signal on the screen. looking at the lab PSU: 5V, 6A?!?... unplugged, checked the cabling: usb wire and HMDI are HOT to touch, but all connected correctly. tried again: ah, now it boots... 0.34A... still
12:29 PM Loetmichel: no picture though. Ah, well, swapped the SDcards, the printer can be headless, dont need HDMI there. Still wondering what THAT was though.
12:52 PM JT-Shop: things are looking better, I only have to remake 1 part...
12:56 PM Tom_L: snow.
12:57 PM gregcnc: that time of year isn't it?
12:57 PM JT-Shop: rain
12:57 PM Tom_L: i'm in denial
02:30 PM JT-Shop: lol
02:47 PM Tom_L: making slow progress on vhdl
02:56 PM pcw_mesa: Its just funky ADA
03:33 PM enleth: so I need to replace the main spindle bearings in my Bridgeport and I just noticed something that wasn't a thing a year or so ago - there's a bunch of replacement Bridgeport spindles available *new* from Taiwan, advertised as made for the Taiwanese clones but compatible with actual Bridgeports
03:34 PM enleth: they come with bearings preinstalled (also without as an option), they cost about as much as a new-old-stock set of Fafnir 207 bearings from the US
03:34 PM enleth: for a full spindle with bearings
03:34 PM enleth: there's even a CNC version available, with the NT30 taper and longer splined top part
03:35 PM enleth: have you heard of anyone using those to fix their BP successfuly?
03:37 PM enleth: they're definitely not straight copies of BP spindles, the bearing stackup is arranged in a slightly different way, so it's an original design, but dimensions provided by the seller absolutely do match in critical places
03:38 PM enleth: seeing as spindle cartridge replacement is a two minute job on a BP and I'm not really risking anything other than $300, I'm inclined to try one of those before I go for replacing bearings on the original spindle
03:41 PM JT-Shop: link
03:48 PM enleth: JT-Shop: https://www.ebay.com/itm/Bridgeport-Milling-Machine-NT30-Shaft-Spindle-6207-Bearing-CNC-Mill-Tools/293180138766?hash=item4442e5e50e:g:PDYAAOSwvNhdSjjG this for example
03:49 PM enleth: the main difference from original Bridgeport parts is that the locknut for main bearings is lower and the top bearing is not a part of the clamped set
03:49 PM enleth: but that doesn't strike me as an important difference
03:49 PM enleth: the top bearing is not a precision part in those spindles anyway
03:51 PM enleth: huh, there's even a 40 taper option: https://www.ebay.com/itm/1Set-Bridgeport-Mill-Part-Milling-Machine-NT40-Spindle-Bearings-Assembly/333201276801
03:51 PM enleth: that could make a difference on a rigid ram machine
03:52 PM enleth: ah, no, the 40 version is definitely not compatible
03:56 PM JT-Shop: mine is a kwik switch 200...
03:59 PM enleth: ugh, that's just asking for a replacement even if it works fine
04:00 PM enleth: unless you also got a crate or two of tooling with the machine
04:01 PM JT-Shop: nothing came with the bp, I purchased a crate load from fleabay
04:01 PM enleth: even my current QC30 is a piece of weird shit, all things considered, and one of those chinese spindles would also bring the possibility of using a power drawbar
04:02 PM enleth: QC30 spindles on Series 1 CNC machines were made solid
04:02 PM JT-Shop: no drawbar needed with the ks200
04:03 PM enleth: no drawbar needed with QC30 either, but I'm not a fan of it
04:03 PM enleth: and tooling is *hard* to get
04:04 PM enleth: mind you, I live in a country where one of the last, if not *the* last dedicated QC30 holders are still being manufactured
04:05 PM enleth: and I consider them an annoyance to buy nevertheless
04:31 PM _unreal_: figures
04:32 PM _unreal_: so I got all excited I got a package in the mail. just a stupid chrimstmas gift. i was hoping it was my Tnuts
04:32 PM _unreal_: sigh
04:32 PM _unreal_: The only thing holding me up on that project is is these freaking nuts
05:12 PM Deejay: gn8
05:40 PM gloops: i ordered a cutter from china ages ago, £3 thing, had about 6 messages from them, but no cutter yet lol
05:41 PM gloops: thing if building a machine with chinese bits, make a list of everything youll need and order it way before you even start building
05:41 PM gloops: its no good sending for stuff half way through
06:11 PM jthornton: what a long day... I hope I finish this project tomorrow so I can install it Wednesday
06:13 PM skunkworks: long day here too - youngest is sick.
06:13 PM jthornton: yuck, that does make for a long day
06:13 PM skunkworks: He is a champ. but sick
06:13 PM skunkworks: happy as a clam but out of it.
06:13 PM jthornton: cool
06:14 PM jthornton: I made the same part 4 times before I stopped screwing it up... geeze I'm slipping up
06:14 PM skunkworks: heh
06:14 PM skunkworks: Been there - have the t-shirt
06:15 PM jthornton: I have so many t-shirts it ain't funny any more lol
06:18 PM jthornton: any clue to the rpi4 following errors yet?
06:20 PM skunkworks: no. been too busy to revisit it
06:20 PM skunkworks: Have you seen it?
06:20 PM jthornton: no, but I've not run it very long
06:21 PM skunkworks: It may be something related to ethernet
06:21 PM jthornton: I need to plug it back in and connect an ethernet card and pretend to run something
06:21 PM skunkworks: I do have to run 500hz servo thread
06:23 PM skunkworks: it seems like it could be a pretty decent platform (fast enough now)
06:23 PM jthornton: yea
06:24 PM veegee: Hey guys, I just bought a 1958 bridgeport with a J head. I'm going to do a full teardown and rebuild since I need to disassemble it to get it through my door.
06:25 PM veegee: It looks like it doesn't have any pump oiler system
06:25 PM veegee: Looks like it was made for full manual oiling. Is there any way to add central oiling to this thing?
06:27 PM jthornton: sure, just add an oiler and configure it to run as you want
06:29 PM jthornton: step pulley or vari drive?
06:32 PM veegee: step pulley I think
06:32 PM veegee: It's still sitting in the seller's shop. Do they all have those grease zerk fittings on them?
06:33 PM veegee: I know you're supposed to pump oil in there
06:33 PM veegee: This machine doesn't have a one shot central oil system, but I'm not sure if it has those fittings either
06:34 PM jthornton: guess you will have to wait till you get it to see what it has
06:43 PM jthornton: my BP knee mill had an Anilam 1100M CNC conversion on it
06:49 PM roycroft: veegee: there are youtube videos showing people adding one-shot oilers to old bridgeports
06:50 PM roycroft: go get a refreshing beverage, make some popcorn, and be entertained and educated at the same time
06:50 PM * jthornton calls it a day and retires to the living room
07:02 PM beachbumpete1: Hey guys
07:03 PM beachbumpete1: before Ieft for work this morning I had to pause the print in my TronXY X5s which I had never done before
07:03 PM beachbumpete1: I paused it, turned off the extruder heater and the bed heater and homed x and y
07:03 PM beachbumpete1: left the machine on and the laptop on
07:04 PM beachbumpete1: just got home from work and reheated the extruder and the bed, manually purged the extruder nozzle, and hit go
07:04 PM beachbumpete1: thankfully it went right back to where it was and is continuing my 35 hour print :)
07:04 PM beachbumpete1: Prett cool! I thought I was screwed there for a minute
07:05 PM beachbumpete1: However I am about to throw this damn roll of filament out the nearest window
07:05 PM beachbumpete1: it keeps getting stuck under other turns of filament
07:06 PM beachbumpete1: I have to remove it, kinda loosen the filament without breaking it off
07:06 PM beachbumpete1: then undo the overlapped filament
07:06 PM beachbumpete1: really sucks
07:07 PM beachbumpete1: I was reading online about different types of filament reel supports and guides but I am not really sure that is the problem
07:08 PM beachbumpete1: I am gonna order some different branded filament for a stocking stuffer and see if it goes any differently
08:05 PM beachbumpete1: Interesting, the print I am doing I got from a youtube video and they said that the print time in simplify3D was 16 hours or so and the print time in Cura is 24 plus hours. Any idea why that might be?
08:16 PM skunkworks: all depends on the speed/acc
08:17 PM beachbumpete1: Hey skunkie
08:18 PM beachbumpete1: well my speed is at 80 or so and accell is around 3k but he did not say anthing about either in the comment
08:19 PM skunkworks: and layer thickness
08:21 PM beachbumpete1: yup I used .2
08:37 PM elmo40: 3,000mm/s/s accelleration?
08:38 PM elmo40: beachbumpete1, what part are you printing to take so long?
08:39 PM _unreal_: hello
08:39 PM beachbumpete1: elmo40: I am making a pair of these...
08:39 PM beachbumpete1: https://www.youtube.com/watch?v=h-RSm97lkOU&t=7s
08:39 PM elmo40: with the X5S?
08:39 PM beachbumpete1: each half is like a 25 hour print
08:39 PM beachbumpete1: yeah with my X5S
08:40 PM beachbumpete1: its been running continually since saturday mid morning except for 8 hours at work today LOL
08:43 PM elmo40: beachbumpete1, do this one next
08:43 PM elmo40: https://www.youtube.com/watch?v=4_4tu4rAtgI
08:43 PM elmo40: i was looking into that tronxy. heard good things about the 'pro' model with steel rails
08:44 PM beachbumpete1: I saw that one actually looks interesting.
08:44 PM elmo40: but, i figure i'd use linear rails on the 'base' model instead.
08:44 PM beachbumpete1: I honestly fought with mine when I first got it assembled
08:44 PM beachbumpete1: but I did not know shit about 3d Printing
08:44 PM beachbumpete1: once I figured a few things out it actually works quite well
08:45 PM beachbumpete1: I have been making a few things here and there but this is by far the biggest project to date.
08:45 PM beachbumpete1: The halves are like 12" across
08:45 PM beachbumpete1: which is the main reason I bought the X5S400
08:45 PM beachbumpete1: I did not want to have to cut and paste parts too much
08:46 PM beachbumpete1: My friend Art is a retired machinist and bought the same one I did at the same time.
08:46 PM beachbumpete1: He loves his and prints stuff almost constantly
08:46 PM beachbumpete1: he also modified it considerably
08:46 PM beachbumpete1: He did the linear rail mod as well as the 24v power supply etc.
08:47 PM beachbumpete1: I wanted to build these speakers for my desk at work to replace the chintsy old PC speakers I am currently using
08:48 PM beachbumpete1: I do think the machine has some flaws however
08:48 PM beachbumpete1: the frame is very big
08:48 PM elmo40: is it rigid enough?
08:48 PM beachbumpete1: but it does move around at the top under acceleration
08:48 PM elmo40: i think it is too tiny.
08:48 PM beachbumpete1: there are plenty of simple things you can do to help
08:49 PM elmo40: yeah. 40mm extrusions...
08:49 PM beachbumpete1: actually just some corner gussets would make a huge difference
08:49 PM beachbumpete1: I printed one I saw on thingiverse
08:49 PM beachbumpete1: it looks like it would work
08:49 PM beachbumpete1: but I honestly never installed it yet
08:49 PM elmo40: buy the metal corners
08:49 PM beachbumpete1: probably gonna buy some aluminum ones
08:50 PM elmo40: they are square
08:50 PM elmo40: ;-)
08:50 PM beachbumpete1: the heat bed takes a little bit to get up to temp
08:50 PM beachbumpete1: it only goes up to like 80 or so and it takes a lot longer to get there than it does to get to say 50
08:51 PM beachbumpete1: I use the glue sticks anyway and often have to use a sharpened putty knife to remove my parts from the glass plate I use for a bed.
08:52 PM beachbumpete1: I am thinking about a few upgrades myself but honestly it is working pretty well. Print quality could definitely be better but most of the stuff I am making does not need to be perfectly smooth
08:52 PM beachbumpete1: This thing for instance is gonna get sanded an painted anyway after it gets glued together
08:52 PM beachbumpete1: That little subwoofer sounds pretty impressive
08:53 PM beachbumpete1: my boss would kill me if I brought both of these things to work and started cranking them up in my office LOL
08:54 PM beachbumpete1: definitely gonna have to get some better filaments and print myself a betteer filament reel management setup.
08:54 PM elmo40: did you add the heat bed insulation?
08:54 PM elmo40: and go to 24V?
08:54 PM beachbumpete1: Also my friend Art was saying that he wants to put the extruder motor in the center of the rear rail
08:54 PM beachbumpete1: and use a shortened tube to the head
08:54 PM beachbumpete1: honestly nope
08:55 PM beachbumpete1: I need to LOL
08:55 PM elmo40: i'm building my own coreXY. larger! maybe 1m x 1m bed.
08:55 PM beachbumpete1: WOAH
08:55 PM beachbumpete1: that is HUGE
08:55 PM beachbumpete1: I thought this thing was big
08:55 PM elmo40: the 400 is a nice size
08:55 PM beachbumpete1: it takes up a corner of my bedroom
08:55 PM beachbumpete1: it really is I think
08:55 PM elmo40: but still quite a few parts that need to be cut...
08:55 PM beachbumpete1: big enough to make a lot of stuff in one go
08:56 PM beachbumpete1: you must print some big stuff
08:56 PM beachbumpete1: I would love to try to print the bb8 or R2D2 robots but at the rate I am going it would take me years to get it done hehe
08:57 PM beachbumpete1: what slicer do you use?
08:57 PM elmo40: i buy 4kg rolls
08:57 PM elmo40: and go through them in 2 days...
08:57 PM beachbumpete1: WOAH
08:58 PM beachbumpete1: I bought two 1kg rolls and still working on them haha
08:58 PM elmo40: many parts take ~8hrs to print at ~900grams
08:58 PM beachbumpete1: what kind of printer are you using?
08:58 PM elmo40: custom (tiny) bed at the moment
08:59 PM elmo40: 250mm x 300mm
08:59 PM beachbumpete1: I saw a video where a guy built a huge copy of a Cr10
08:59 PM beachbumpete1: looked interesting
08:59 PM elmo40: i mainly use PETG. It has nicer properties for the items I print. Less 'brittle' compared to PLA
09:00 PM beachbumpete1: I think the basic design of the Tronxy cube has some advantages
09:00 PM beachbumpete1: I need to try some PETG
09:00 PM beachbumpete1: what brand do you recommend?
09:00 PM elmo40: cartesian is not my preferred way to go. it will be a core machine
09:00 PM elmo40: i dont see any difference in brands. honestly.
09:01 PM elmo40: there is a difference between 2 rolls of the same brand and same colour that changing brands doesn't mean anything.
09:01 PM beachbumpete1: have you ever had the filament get stuck coming out of the roll under other winds of the filament like I am getting here?
09:02 PM beachbumpete1: it seems like the i3 type machines work quite well with dual linear rods on each axis and motors on both sides of the vertical
09:02 PM beachbumpete1: the way the corexy works is very smooth however
09:03 PM beachbumpete1: it moves very fast
09:03 PM elmo40: if i let go it might recoil back and tuck under
09:03 PM flyback: B
09:03 PM flyback: M
09:03 PM flyback: C
09:03 PM flyback: C
09:03 PM beachbumpete1: are you supposed to keep tension on the roll?
09:04 PM elmo40: i made cones with bearings
09:04 PM beachbumpete1: the tronxy comes with a threaded rod that you bolt onto the side of one of the uprights
09:04 PM beachbumpete1: you just hang the roll over that so no means of keeping tension on the roll really
09:04 PM elmo40: but they are held in a 3/8" threaded rod. i tighten the nuts to the point where it is free wheeling but 'snug'
09:04 PM beachbumpete1: AAH!
09:05 PM beachbumpete1: that is worth trying I think
09:05 PM beachbumpete1: I could even use the factory rod
09:06 PM beachbumpete1: it really sucks I have to babysit the roll the entire time or it gets stuck and the extruder cannot pull it into the machine.,
09:06 PM elmo40: how is the roll held in place?
09:06 PM elmo40: just sitting on the holder with one open side?
09:07 PM elmo40: i dont remember what the photos were
09:07 PM beachbumpete1: the end of the bolt keeps it from falling off
09:07 PM beachbumpete1: dead basic
09:07 PM elmo40: it is simple. while it is using it you can loosen some, lift the spool and untuck the one loop by bringing it under and around.
09:07 PM elmo40: if you go the wrong way it doubles it. ;-)
09:08 PM elmo40: very simple
09:08 PM elmo40: try doing that with a 4kg roll ;-)
09:09 PM beachbumpete1: well that is essentially what I do. When it gets tight I grab the roll and carefully remove it from the bolt and push the filament back into the roll making it slack and then a few turns of the offending winds get loose enough to extricate the lead end
09:15 PM beachbumpete1: elmo what slicer do you use?
09:35 PM elmo40: no no. don't just push it back
09:36 PM elmo40: you need to loosen a bit. unwind a little.
09:36 PM elmo40: then take a loop and fold it over the back side...
09:36 PM elmo40: it is difficult to explain in text
09:38 PM elmo40: beachbumpete1, I mainly use Cura 4.4.0
09:40 PM elmo40: for free software it works fairly well.
09:41 PM elmo40: beachbumpete1, watch this. it is long winded... but will help you out.
09:41 PM elmo40: https://www.youtube.com/watch?v=uf66_3bzIgc
09:45 PM beachbumpete1: thanks man what is your bed temp with the petg?
09:48 PM beachbumpete1: thats funny I tried to do exactly what he said with both of these spools and was unable to fix the problem. maybe I will try it again.
09:55 PM elmo40: 70 for PETG
09:55 PM elmo40: maybe there are 2 loops?
09:55 PM beachbumpete1: nice
09:55 PM beachbumpete1: I dont know right now the spool is laying on the floor and it seems to be paying out okay right now
09:56 PM beachbumpete1: I tried to unwind it a bit but I don't want to risk snapping it and having to rush to mend it somehow before it reaches the extruder hehe
09:57 PM elmo40: the first 10 or so layers do tend to warp a lot. i am running a 1.2mm nozzle and 0.76 layer heights and 2 walls. that may be the reason for the extreme warping. i will be enclosing the machine shortly. i hope that will help prevent some of that.
09:57 PM elmo40: this is why i don't purchase PLA anymore
09:57 PM elmo40: brittle shit
09:58 PM elmo40: PETG is more gummy and stringy but far more durable.
09:58 PM elmo40: and you can get all the same colours in PETG
09:58 PM beachbumpete1: interesting. do you think you can successfully print with it at say 50 if you use glue stick?
09:58 PM elmo40: though i haven't seen wood filament yet
09:58 PM elmo40: most likely
09:59 PM elmo40: i never used glue stick...
09:59 PM elmo40: i use tape
09:59 PM elmo40: or magigoo on glass.
09:59 PM beachbumpete1: I quite like the glue stick I have mostly successful first layers even when my bed height is not spot on
09:59 PM elmo40: hair spray and glue sticks dont really work when heated. that is only for cold beds.
10:00 PM elmo40: just going real slow on first layer will work. no adhesion really necessary depending on how complicated the part is.
10:00 PM elmo40: long straight parts and you dont really need anything.
10:00 PM beachbumpete1: I use a glass bed and glue stick on a heated bed and as I said I typically have to cut the part away from the glass with a very sharp thin putty knife
10:01 PM elmo40: PLA doesn't even need a heated bed
10:01 PM beachbumpete1: I have heard that
10:02 PM Wolf__: magigoo
10:02 PM beachbumpete1: first I have heard of that stuff
10:02 PM beachbumpete1: I think after watching that video and another one like it I need to print a spool management device for the tronxy
10:03 PM Wolf__: stuff works great, I use it on heated glass, soon as it cool the prints pop right off, abs and petg
10:05 PM beachbumpete1: cool
10:05 PM beachbumpete1: I need to try this petg
10:08 PM beachbumpete1: do you guys use octoprint and remotely monitor?
10:09 PM Wolf__: using repeterhost here
10:09 PM beachbumpete1: thats what I am using as well.
10:10 PM Wolf__: everything works right now so I dont want to mess with it
10:10 PM beachbumpete1: I can only get this print in Cura down to 25 hours or so. Does not matter the settings it seems
10:10 PM Wolf__: thinking of building a 2nd printer and use all the newer crap on
10:16 PM beachbumpete1: that was weird
10:20 PM Sabotend_ is now known as Sabotender
10:20 PM beachbumpete1: .
10:35 PM _unreal_: yet an other day NO tnuts