#garfield Logs
Aug 31 2018
#garfield Calendar
09:58 PM Tom_L: https://3dprintingindustry.com/news/u-s-marines-use-3d-printing-to-rapidly-construct-concrete-barrack-139125/
10:02 PM Tom_L: https://3dprintingindustry.com/wp-content/uploads/2018/08/180822-M-ZZ999-003.jpg
10:02 PM Tom_L: check out the picture of the screen, about 2/3 down
10:02 PM Tom_L: same GUI i'm using on the mill :)
10:02 PM fckng_stupid: 3D printing a wavey cement wall?
10:08 PM rue_: I recon its wavey to make itself stay up
10:08 PM rue_: as a 3d printing guy, I can say, its overextruded
10:08 PM * fckng_stupid stupidly nods
10:08 PM rue_: less material, thinner layers
10:09 PM zhanx: https://www.amazon.com/Stepper-Controller-Controls-Beauty-Star/dp/B077MDVTF9/
10:09 PM zhanx: no buying those but looking
10:09 PM rue_: if I could afford the concrete I'd show them how its done
10:09 PM rue_: zhanx, !!! 3pcs for $34!
10:10 PM Tom_L: not very big
10:11 PM zhanx: yea i am looking for something for a small cnc built
10:11 PM Tom_L: nema 17 or 23?
10:11 PM rue_: did you see th ones I used from china?
10:11 PM zhanx: 23 and no rue_
10:12 PM zhanx: rue_, keep in mind this will be outside 24/7
10:12 PM Tom_L: those might not be big enough for 23
10:12 PM Tom_L: maybe...
10:13 PM zhanx: k
10:13 PM rue_: https://www.aliexpress.com/item/Low-Noise-42-57-Stepper-Motor-Driver-CNC-4A-Hybrid-Stepping-Motor-Driver-For-3D-Printer/32890358807.html
10:14 PM zhanx: a bit cheaper
10:14 PM rue_: actaully, it was ...
10:15 PM rue_: https://www.aliexpress.com/item/NEW-TB6600-4-5A-CNC-Single-Axis-Stepper-Motor-Driver-Board-Controller/32662404083.html
10:15 PM rue_: but the other link came up first
10:15 PM rue_: I think that first link has a wrong price...
10:15 PM rue_: unless shipping changes wehn I...
10:16 PM rue_: ah there
10:16 PM rue_: yea
10:16 PM rue_: about $12 ea is 'normal'
10:16 PM Tom_L: i've heard them talk about the new chip but i wasn't sure which one they were referring to
10:16 PM Tom_L: i think that last link is it
10:17 PM zhanx: k
10:30 PM rue_: wtf, aliexpress just .. did soemthing strange when i tried to use cupons
10:31 PM rue_: it seemed to day I could get $6 off, then it said my cupons were used up and I didn't get the $6 off
10:31 PM rue_: huh
10:31 PM rue_: it was still a good deal
10:31 PM zhanx: what you get?
10:41 PM rue_: 10 of those drivers, came out to $7ea
10:41 PM zhanx: you spent 70 dollars on something?
10:41 PM rue_: partly cause it said I'd get $6 off, that it didnt' give me
10:42 PM rue_: whatever, $7ea is sweet
10:42 PM rue_: I'll use them
10:42 PM zhanx: k
10:42 PM zhanx: i am torn
10:43 PM zhanx: I need to get a new laptop for work or buy a battery for this one and use it still
10:44 PM rue_: remembe that flushing out extra fonts will speed the old one up amazingly well
10:44 PM zhanx: i run linux with 2 fonts
10:45 PM zhanx: but you know that
10:47 PM rue_: I lapsed, sorry
10:47 PM zhanx: you tend to do that more lately
10:47 PM zhanx: you ok?
10:48 PM rue_: I'm worried about my brain
10:48 PM rue_: enough to consider buying a $2000 ultrasound machine from chian
10:49 PM zhanx: wait canada has free health care, i am told is epic
10:49 PM rue_: yes, but it still has incompitent doctors
10:49 PM rue_: "doctor!! my arm fell off! help!" "oh, oh no, thats normal, your ok, go home"
10:51 PM rue_: so, ofteen being able to get to a specialist who can even know something about whatyour talking about is a challange
10:51 PM zhanx: https://www.thingiverse.com/make:132050 whats your thoughts on that?
10:52 PM rue_: china sells carbs!?
10:54 PM rue_: zhanx, seen one, horrid for anything needing regidity
10:54 PM zhanx: i don't
10:54 PM zhanx: its for the garden
10:54 PM rue_: oh sure, fine then
10:55 PM zhanx: i want it easy to move etc
10:55 PM zhanx: 2 people quick
10:57 PM rue_: hah,, how often do YOU have a 2nd person?
10:57 PM rue_: I made that error with my casting setup
10:57 PM zhanx: never
10:59 PM rue_: hahah they took the pic at the wrong angle
10:59 PM rue_: https://www.aliexpress.com/item/BRIGGS-STRATTON-CARBURETOR-FOR-7-8-HP-ENGINES-REPLACES-390323-NEW-TROYBILT/32231323560.html
10:59 PM rue_: thats the #$@#$^@#%$W updraft carb THATS ON my freaking generator
11:00 PM rue_: the flange points up
11:00 PM zhanx: they don't know that
11:00 PM rue_: and if I didn't know better, I'd say that looks like a walnut blasted rebuild
11:01 PM Tom_L: what do you need an ultrasound for?
11:01 PM rue_: I need to know if there is a tumor in my brain
11:01 PM rue_: somewhere around where words are stored
11:01 PM Tom_L: open the hood and take a look
11:02 PM rue_: I dont have a proper anti-static workstation to do it
11:02 PM zhanx: or a proper clean room
11:03 PM Tom_L: a friend's wife had one the size of a grapefruit the had to remove
11:03 PM rue_: how the hell did she get them to look for it
11:04 PM Tom_L: i dunno, unusual mood swings etc
11:04 PM Tom_L: i wasn't there
11:04 PM Tom_L: it will grow back too
11:05 PM rue_: oh, a lady was having mood swings so they removed part of her brain... this paints a different picture
11:05 PM Tom_L: it was putting alot of pressure on the brain
11:06 PM rue_: hahaha a TP roll holder with integrated cell phone holder, so you can put it down when you really need the other hand
11:08 PM rue_: https://www.aliexpress.com/store/product/600pcs-Set-AWG-10-22-Wire-Copper-Tube-Connector-Insulated-End-Terminal-With-Box/2164034_32802240395.html
11:08 PM rue_: I could NOT find those when I once looked
11:10 PM Tom_L: https://i.ebayimg.com/images/g/H28AAOSwePtZ5MiH/s-l300.jpg
11:11 PM Tom_L: childhood memories
11:11 PM Tom_L: https://rlv.zcache.com/reddy_kilowatt_a_travel_mug-r9d0b756bfdea4563b54ba4806d0e0765_x7jsd_8byvr_307.jpg?rvtype=content
11:14 PM rue_: tom, were the ends of your ball screws machined?
11:15 PM Tom_L: yes
11:15 PM Tom_L: threaded for the nut too
11:15 PM rue_: so, the one I got wasn't
11:15 PM rue_: and the nut is on it
11:15 PM Tom_L: so i hear
11:15 PM rue_: so...
11:16 PM Tom_L: yeah it better be
11:16 PM rue_: hmm
11:16 PM Tom_L: i had my friend turn one down for me
11:16 PM rue_: it would be nice if it were off to the side with a retainer
11:16 PM Tom_L: i cut to size
11:16 PM Tom_L: surface hard but soft after that
11:16 PM Tom_L: and hard to center
11:16 PM rue_: I suppose if I had two, I could just transfer the nut over
11:16 PM Tom_L: it would be a challenge
11:17 PM Tom_L: not one i would try
11:17 PM rue_: well I'd be more worried about the turndown not comming out centred
11:18 PM Tom_L: yeah
11:18 PM Tom_L: so make a bushing to fit the thread and hold it in the lathe that way
11:18 PM Tom_L: mine came out fair
11:18 PM rue_: and ya know, I think that the sale prices aren't better then the regular ones
11:19 PM rue_: I dont even know if I want to use it
11:19 PM Tom_L: the kit i showed you was the cheapest one you will find for an all inclusive kit
11:19 PM rue_: I'd SWEAR there is play, its springy, but I'm sure its there
11:19 PM Tom_L: maybe but i have my doubts
11:19 PM Tom_L: mine are tight
11:20 PM rue_: it almost seems like the plastic wipers are the main positioning, it does have balls, I checked
11:20 PM rue_: its got axial rock, but I held everything in place and pulled.pushed
11:20 PM rue_: I'm sure I saw movement
11:21 PM Tom_L: https://www.ebay.com/itm/US-6x-20mm-Square-Guide-Linear-Rail-SFU1605-Ballscrew-400-700-1000mm-BK-BF-HGH20/273434670550?epid=3011634041&hash=item3fa9f9f5d6:g:hewAAOSwUf5bYRKw
11:21 PM Tom_L: comes with everything
11:21 PM Tom_L: ali was higher
11:21 PM rue_: inc. $87 US shipping?
11:21 PM rue_: May not ship to Canada - Read item description or contact seller for shipping
11:21 PM Tom_L: no matter which kit you find they all end up being the same price
11:22 PM Tom_L: they split it up with cost vs shipping
11:22 PM rue_: us $398, = ~$580 cad
11:22 PM Tom_L: 20mm rails
11:22 PM Tom_L: 16mm screws
11:23 PM rue_: I was trying to find small ballscrews from china, nothing smaller than 12mm
11:24 PM Tom_L: the screws etc by themselves end up costing more
11:24 PM Tom_L: i tried to piece together a kit too and figured that out
11:24 PM Tom_L: i didn't want round rails either
11:24 PM Tom_L: square are better
11:26 PM Tom_L: the 1k mm was a bit long for mine so i cut it and had my bud turn the end
11:26 PM Tom_L: taped the nut in place on the screw
11:27 PM Tom_L: i made a collar to fit the thread to hold it in the lathe
11:27 PM Tom_L: if i did it over, i'd add balls and make the collar diameter bigger and hold it on the actual ball surface to center it better
11:28 PM rue_: hmm
11:29 PM Tom_L: so the 400 was z the 700 went on X and i cut the 1k in half and made it Y
11:29 PM rue_: I was wondering about just grabbing it as is
11:29 PM Tom_L: approx half
11:29 PM Tom_L: no
11:29 PM Tom_L: don't do that
11:29 PM Tom_L: you will scar the thread and the balls won't be smooth
11:29 PM rue_: well, the 3 jaw on the lathe is out
11:30 PM rue_: no I mean grab it where its anchored/driven
11:30 PM Tom_L: i just made a collar from alum and slotted it to spread it to get it on
11:30 PM rue_: aka, off travel
11:30 PM Tom_L: i know what you mean
11:30 PM rue_: I dont even know if the outter surface is controlled
11:30 PM Tom_L: probably not
11:31 PM rue_: thats part of the problem with normal threaded rod
11:31 PM rue_: the thread 'drifts' in the dia of it
11:31 PM Tom_L: that's why i suggested using some balls and the collar
11:31 PM rue_: oh, put the balls against eh inner threads
11:31 PM Tom_L: stuff some balls in with the collar on so it centers on the root of the thread not the crest
11:31 PM rue_: ah
11:31 PM Tom_L: yes
11:32 PM rue_: ... think on that...
11:32 PM rue_: or bar
11:32 PM rue_: bent in
11:32 PM Tom_L: it would take a bit to get the balls in place but i think it would center it better
11:32 PM Tom_L: i considered copper wire
11:32 PM Tom_L: wind it around the screw and put the collar on that
11:33 PM Tom_L: if the copper is consistent enough
11:33 PM Tom_L: surely you know where to find copper wire :D
11:34 PM Tom_L: need to be the right gage though
11:35 PM rue_: I dont know how big its balls are, finding larger dia solid copper is a challange
11:35 PM Tom_L: mine isn't perfectly centerd but i figure it doesn't turn enough to wear it out in my lifetime
11:35 PM Tom_L: it shouldn't be that bit of wire
11:35 PM Tom_L: big*
11:35 PM Tom_L: got a radius gage?
11:35 PM Tom_L: i just picked up a set...
11:36 PM Tom_L: measure the ball groove
11:36 PM rue_: no radius guage.... no
11:36 PM rue_: but... cnc machine!
11:36 PM Tom_L: or look at their specs, it might give it
11:36 PM rue_: hahaha china.... specs!!! ahahhahahahahahaha
11:36 PM Tom_L: i found some for what i was looking for
11:36 PM Tom_L: hywin
11:37 PM rue_: it LOOKS like china has standardized ballscerws
11:37 PM rue_: 1204 1605...
11:38 PM Tom_L: https://www.hiwin.com/pdf/ballscrews.pdf
11:38 PM rue_: if I'm gonna use the drillpress head, I just need an XY setup
11:39 PM Tom_L: P7 might have it
11:43 PM Tom_L: 214 pages should keep you busy for a while
11:44 PM rue_: oh dear god its 214, I'm at 17
11:44 PM rue_: TOM!
11:45 PM Tom_L: but you said they had no specs :)
11:46 PM rue_: there is something to drool over about every 5th page
11:46 PM Tom_L: iirc there's data for the rails too
11:46 PM Tom_L: i know there's cad models for both cause i have em
11:46 PM rue_: why dont I just use some freaking huge hydraulic cylinder?
11:46 PM zhanx: weight?
11:47 PM rue_: oh this is my childhood all over again, a big book of things I cant have
11:47 PM rue_: check my damn lottery ticket tommorow
11:47 PM zhanx: yep
11:48 PM rue_: awe man, in this one, their using the hollow middle of the ball screw as a oil conduit between the endbearings for a circulated lubrication system!
11:48 PM Tom_L: https://www.hiwin.com/pdf/linear_guideways.pdf
11:49 PM Tom_L: there's the rails
11:49 PM Tom_L: another 211 pages of fun
11:49 PM rue_: no screw that, I'm playing with avr tonight
11:49 PM rue_: I got 3 hrs sleep, that should keep me good till 6am
11:50 PM Tom_L: that's about when i'll be gettin up
11:50 PM Tom_L: gnite
11:52 PM rue_: I'm trying to deal with friction
11:53 PM rue_: maybe I should use regular thread, hydraulic pressure systemw ith normal threaded rod