#robotics Logs
Dec 23 2017
#robotics Calendar
12:06 AM rue_mohr: ok, so I want to know if I can use UV nailpolish to photomask aluminum
12:08 AM rue_mohr: if so, I can make some awesome encoder disks
12:10 AM TheJester: Greets
12:10 AM rue_mohr: so, if I turn myself into a robot,
12:10 AM rue_mohr: then in 1000 years, should I still put up a tree with lights?
12:10 AM TheJester: yeah?
12:13 AM rue_mohr: TheJester, been worried about ya
12:13 AM rue_mohr: no more strokes?
12:13 AM TheJester: you know my number?
12:13 AM rue_mohr: yes, but I dont kow your sleep schedule and you know when I remember...11:00
12:13 AM TheJester: Im a little worse
12:13 AM rue_mohr: hey, the lab results are back, my cholesterol is still waaaay over the legal limit
12:13 AM rue_mohr: worse?....
12:13 AM rue_mohr: hey save your left hand, shall I just phone ya?
12:14 AM TheJester: i think you could consider then aftershocks
12:14 AM TheJester: yaya
01:40 AM rue_mohr: ok, if I ask, the 1200 10 ohm 0805 resistors are for fet drivers
02:12 AM AchiestDragon: ho rue_bed while i remeber you where going on about volume levels of some ki not beeing good enough and needed to make a 3db boost ,, check in the settings of those devices quite often you may find a setting to adjust max volume that can be raised above 100% (to 150%) that will give you the 3db boost the limit was set not because of hardware limits but because of people ocmplaning that listening to other peoples music was damaging
02:12 AM AchiestDragon: to there ears , or some other simlar reason
02:20 AM AchiestDragon: but apparnantly this is ok https://video-images.vice.com/articles/5886b6e1c860fd45c9f2e557/lede/1485967154659-1435884042694653.jpeg?crop=1xw:0.8333333333333334xh;center,center&resize=1200:*
02:29 AM rue_bed: I thouht one of the rules was that you dont put the speakers behind the players
12:09 PM anonnumberanon: Santa dropped off a bunch of tools here
12:11 PM rue_bed: ;)
12:12 PM robotustra: there are 3 periods in a life of man 1) when he believes in Santa 2) when he doesn't believe in Santa 3) He is a Santa
12:13 PM robotustra: I think I reached the third stage because I buy tools myself :)
12:14 PM rue_bed: 23rd, ok
12:14 PM rue_bed: I'm awake, I'm awake
12:15 PM robotustra: ok, let's start scraping
12:15 PM rue_bed: no, not in bed!
12:15 PM robotustra: or order some bolts
12:16 PM rue_bed: shavings, bad,
12:16 PM rue_bed: bolts?
12:16 PM rue_bed: I have a magic bolt store, they have everything
12:16 PM robotustra: yeah, I need some M6 bolts for the lathe
12:16 PM rue_bed: even the impossable to find stuff you didn't know existed and wasn't what you wanted
12:17 PM rue_bed: till you were given the option and chose incorrrectly
12:17 PM robotustra: ok, I have to start count bolts on my machine
12:18 PM rue_bed: dont you just have a stock?
12:18 PM robotustra: no
12:18 PM rue_bed: so, if you count one out, you have to reorder and wait again?
12:18 PM robotustra: I live in appertment
12:18 PM rue_bed: then why aren't you using the lathe at the hackspace?
12:18 PM robotustra: I usually count, multiply by 2 and order
12:19 PM rue_bed: your paying about $100/mo to be part of the hackspace, right?
12:19 PM robotustra: I have some stock of small bolts from M2.0 up to M5
12:19 PM rue_bed: hah, I had to expand the size of my shop stock too
12:20 PM robotustra: I don't visit any hackerspace
12:20 PM rue_bed: I go up to 1" now
12:20 PM rue_bed: but.... you live in an appartment
12:20 PM robotustra: my room IS a hackerspace
12:20 PM robotustra: 1 room in appartment
12:20 PM rue_bed: huh
12:21 PM rue_bed: I need to put lights on a tree
12:21 PM rue_bed: so I need to unburrry the lights
12:22 PM rue_bed: well, getting out of bed might be a good first step
12:22 PM veverak: slam on its way
12:22 PM rue_bed: using?
12:22 PM veverak: downloading test data
12:22 PM rue_bed: sonar?
12:22 PM veverak: monocular usb camera
12:23 PM rue_bed: plane z leveling?
12:23 PM robotustra: rue_bed, I think it looks like hacker space https://imgur.com/UeQJF65
12:23 PM veverak: wat? :)
12:23 PM veverak: it's 3D slam
12:24 PM veverak: https://github.com/raulmur/ORB_SLAM2
12:24 PM veverak: I went through the article
12:24 PM rue_bed: yea, snap the visual field into areas of 2d planes that are based on their sheer
12:24 PM rue_bed: u, nevermind
12:24 PM veverak: looks nice
12:29 PM rue_mohr: waaaaait a sec
12:29 PM rue_mohr: isn't this slam stuff just a tweek of the AR demo that came out in like 2000?
12:36 PM rue_mohr: markerless AR
12:36 PM rue_mohr: hmm
12:47 PM anonnumberanon: Yeah robotustra i am santa this year. Parents decided to be worthless on that front. With all due respect.
12:49 PM veverak: rue_mohr: what?
12:50 PM codepython777: Is there a comparison of IMUs errors vs price somewhere? I am looking for a good IMU for < $200.
12:51 PM anonnumberanon: codepython you are worried about availibility of code?
12:56 PM edmoore: i know 'alibaba' is the answer to absolutely everything, but does anyone know of an online source for reasonably cheap packaged dc motors with gearboxes (especially worm gear boxes) that also has at least some accompanying technical info?
12:56 PM edmoore: sort of 1-5W ballpark
12:56 PM robotustra: codepython777, I used quite good IMU which does not drift from adafruit
12:56 PM robotustra: ~$20
12:57 PM robotustra: I left it on 24 hours - no drift
12:57 PM robotustra: oh, it's 35$ now
12:58 PM robotustra: codepython777, https://www.adafruit.com/product/2472
12:58 PM robotustra: I have read it at 200 Hz
12:59 PM robotustra: everything except magnetometer
01:08 PM edmoore: i'm interested in this q too actually
01:08 PM edmoore: what's the best lots-of-things-in-one-package inertial sensor atm
01:08 PM edmoore: for about the same money
01:08 PM edmoore: IC rather than PCB
02:25 PM SpeedEvil: I have idly wonderd on '$200 IMU' about 50 $4 IMUs in parallel
02:26 PM SpeedEvil: sqrt(50) is a nice improvement when you're double integrating it.
02:36 PM codepython777: robotustra: is there a systematic study somewhere - that compares the errors ?
02:36 PM codepython777: SpeedEvil: good thought.. :)
02:40 PM rue_mohr: "robot, which way is down" robot points out window. "told ya, drift."
02:42 PM SpeedEvil: The 'proper' question would be something like 'In combination with where and how my robot will be operated, and the positioning inputs I will be using, how do the various solutions position/velocity/orientation affect me'
02:43 PM SpeedEvil: Once properly filtered
02:43 PM SpeedEvil: For example, you don't care about Z drift on a car.
02:44 PM SpeedEvil: And if you have a GPS too, and it works, and you're outside, you can with wheel sensors get a really good idea of heading, and turning from wheel position and GPS, and that will greatly reduce long term drift from your INS bit
02:48 PM codepython777: SpeedEvil: I need it for a flying machine, with a GPS that has a large error ( a meter )
02:49 PM rue_mohr: offset of scale
02:50 PM codepython777: This is nice (wish it had an error estimate) : https://damien.douxchamps.net/research/imu/
02:50 PM SpeedEvil: The IMU will help correct short-term noise in the GPS.
02:50 PM codepython777: SpeedEvil: indeed that is my application.
02:51 PM SpeedEvil: accelleration/... noise is a useful baseline figure.
02:51 PM SpeedEvil: this is usually for good accellerometers in the range 100-200ug/sqrt(hz)
02:51 PM codepython777: That page - look at the pricing - $30k+ imus
02:51 PM codepython777: without any error estimates ?
02:54 PM codepython777: MEMS IMUS cost from $9 to $30k - still looking for error comparisons between different companies
02:57 PM SpeedEvil: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3522994/ looks interesting
02:58 PM SpeedEvil: I was hoping to find a nice page of some mearuements of fused performance, but did not find anything obvious searching for "
02:58 PM SpeedEvil: error measured gps imu kalman sqrt
03:00 PM SpeedEvil: It's possible #multirotor may have someone around with a clue
03:02 PM codepython777: SpeedEvil: 3DM-CV5 is 3DM's latest sensor (that paper uses an older one) - no prices on the web yet
03:03 PM SpeedEvil: yes, but it would presumably give some performance figures
03:03 PM SpeedEvil: and how they calculated the fused error
03:03 PM codepython777: http://www.microstrain.com/support/news/lord-corporation-adds-low-cost-industrial-grade-3dm-cv5-inertial-sensor-family
03:09 PM SpeedEvil: https://www.google.co.uk/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=fflb&dcr=0&biw=1067&bih=555&ei=rsU-Wpf4AoXBgAaCupewBQ&q=ug%2Fsqrt%28hz%29+GPS+error+measured+integrated+kalman&oq=ug%2Fsqrt%28hz%29+GPS+error+measured+integrated+kalman&gs_l=psy-ab.3..33i160k1.21348.25425.0.25662.22.21.1.0.0.0.188.1817.10j8.18.0....0...1c.1.64.psy-ab..3.12.1283...33i21k1.0.wEf-P44II1o seems to result in lots of hits
03:11 PM codepython777: SpeedEvil: most of those papers, just pick 1 or 2 IMUs and evaluate their results
03:12 PM SpeedEvil: yes.
03:12 PM SpeedEvil: You look at the mechanism and any generalisable way to go from ug/sqrt(hz) and GPS to position and then go to the parametric selectors of the vendors or datasheets for noise figures
03:13 PM SpeedEvil: and then compute
03:15 PM codepython777: SpeedEvil: thanks
03:15 PM SpeedEvil: A quick review a few years ago indicated there were no awesomely low noise solutions, and the market pretty much settled on a common 100ug/sqrt(hz) bottom floor dor the lowest noise ones.
03:16 PM SpeedEvil: For phone class accels.
03:17 PM SpeedEvil: http://www.st.com/content/st_com/en/products/mems-and-sensors/accelerometers.html?querycriteria=productId=SC444
03:18 PM SpeedEvil: http://www.st.com/content/st_com/en/products/mems-and-sensors/accelerometers/lis3dhh.html claims 44ug/sqrt(hz)
03:25 PM codepython777: SpeedEvil: http://www.microstrain.com/sites/default/files/3dm-cv5-25_datasheet_8400-0100_0.pdf - I dont see the ug/hz rate here?
03:26 PM codepython777: noise density number?
03:26 PM codepython777: 100 ug / sqrt(hz) ?
03:27 PM SpeedEvil: yes
03:28 PM codepython777: so the LIS has unit price of $5.2 and has half the error of the $2k priced 3DM units?
03:28 PM codepython777: LIS3DHHTR - $5.2 unit price
03:30 PM Tom_shop: hah, on the Z axis the angle i welded to the upright before milling is within .003 - .005" within parallel and flat. just checked the rails with my last word indicator
03:31 PM SpeedEvil: :)
03:31 PM Tom_shop: i _did_ spend over an hour aligning them before tacking them on though
03:34 PM codepython777: SpeedEvil: LIS3DHHTR - looking for a breakout board for it now :)
03:35 PM SpeedEvil: This is ideal, and assumes that you can get that figure (44) in teh face of noise and vibration
03:35 PM Tom_shop: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Z_Slide2.jpg
03:36 PM Tom_shop: ኦድድ
03:38 PM Tom_shop: ok that was odd
03:39 PM Tom_shop: measuring across those 2 rails...
03:45 PM Tom_shop: i'm wondering what to use for a hard stop at the ends of those rails.
03:45 PM Tom_shop: i thought about just tapping a screw in the angle iron to bump the slides when they reach the ends
04:05 PM robotustra: the bearing block will stop it hard
04:06 PM Tom_shop: there's nothing blocking the end though. they'll slide right off the end
04:06 PM Tom_shop: before the screw reaches the end of travel
04:07 PM robotustra: you didn't draw your end stops?
04:07 PM Tom_shop: not yet no
04:07 PM codepython777: SpeedEvil: LIS3DHHTR - still no luck with breakout board for this chip
04:08 PM SpeedEvil: it's just a low noise variant isn't it - you just need a suitable board to solder it to
04:08 PM SpeedEvil: (for the regular one)
04:09 PM codepython777: SpeedEvil: http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mems-motion-sensor-eval-boards/steval-mki180v1.html
04:28 PM anonnumberanon: Which is the most useful sander, this one or the one with 2 round stones on each side? Not for wood. https://www.amazon.com/gp/aw/d/B00NAXSYT8/ref=mp_s_a_1_3?ie=UTF8&qid=1514067979&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=belt+sander
04:39 PM rue_mohr: the left side of that is called a disc sander
04:39 PM rue_mohr: the top is called a belt sander
04:39 PM rue_mohr: that one looks like a bad version of both glued togethor
04:39 PM rue_mohr: if its just for small stuff, go for it
04:52 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/discsander/p1070920.jpg
04:52 PM rue_mohr: I'm sorry, there isn't much of a build log, seems I was too busy building it
04:52 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/discsander/slide.htm
04:54 PM rue_mohr: I'v gained a lot of stuff in the past 2 years
04:54 PM rue_mohr: was going thru the images
04:54 PM rue_mohr: 2 3d printers, cnc machine, sand blaster, disc sander...
04:54 PM rue_mohr: I'm not feeling like the progress is exponential yet
05:12 PM robotustra: counted bolts
05:13 PM robotustra: 190 bolts+
05:21 PM robotustra: Tom_L, about surface plate https://www.youtube.com/watch?v=w-wbWGwZ7_k
06:37 PM robotustra: Tom_shop, do you know that 1/2" aluminum plate as flexible as 1/4" steel plate?
06:44 PM Tom_shop: i wouldn't be surprised
06:44 PM rue_mohr: yes but it was 400x more available
06:45 PM Tom_shop: mounting the Z axis screw tonight
06:46 PM durrf: gonna get the screw up
06:55 PM robotustra: hm ordered bolts for 50 bux
06:55 PM Tom_shop: what sort of bolts?
06:55 PM rue_mohr: grade 24
06:55 PM robotustra: should be enough for whole lathe
06:55 PM robotustra: no
06:55 PM rue_mohr: they are strong, but will shatter if you drop them
06:55 PM Tom_shop: i got 100 ea of 5mm x 20 and 5mm x 15 for $5 a box
06:55 PM robotustra: grade 12.9
06:56 PM rue_mohr: when you cnvert that metric grade to imperial its 24
06:56 PM rue_mohr: like I say, they shatter if you drop them
06:56 PM rue_mohr: its interesting how, engineers can overgrade a bolt
06:57 PM rue_mohr: sometimes you need to use a lower grade to get the durability for an application
06:57 PM Tom_shop: these are just standard grade 8 socket head cap screws
06:57 PM robotustra: I got 100x M6x16mm
06:57 PM robotustra: 100x M6x20
06:57 PM robotustra: 50 M6x45
06:58 PM robotustra: 40 M5x20
06:58 PM robotustra: other small M3 I have
06:58 PM Tom_shop: i got some of those too, M6 x 45
06:59 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/discsander/slide.htm
06:59 PM robotustra: I'll screw bearng hubs with them
06:59 PM rue_mohr: in tehlast year, I still havn't managed to screw the cover on that motor
07:00 PM robotustra: the lathe will have about 200 bolts in it
07:00 PM robotustra: oh, I have to order some taps
07:01 PM Tom_shop: got those too
07:01 PM Tom_shop: using them as i type
07:11 PM anonnumberanon: Robotustra what lathe?
07:13 PM rue_mohr: 5578
07:34 PM robotustra: anonnumberanon, cnc lathe
07:40 PM robotustra: anonnumberanon, this lathe https://imgur.com/XDbikNu
07:55 PM anonnumberanon: Robo, ah i see. Very nice. Does it take a fancy motor? Fancy weighted spindle? Both?
07:56 PM anonnumberanon: Would be kinda special if you designed in such a way that all of its parts could be made with your cnc.
08:06 PM robotustra: anonnumberanon, the motor is not fancy, it's 1.5kW chinese spindle up to 24000 rpm
08:07 PM robotustra: and I can't mill steel on my cnc because it's made of aluminum
08:07 PM robotustra: it's not so rigid for steel
08:08 PM robotustra: but I will modify pulleys on my cnc mill
08:09 PM anonnumberanon: The lathe has to be steel?
08:09 PM robotustra: it is
08:09 PM robotustra: I'm scraping metal now to make it flat
08:09 PM robotustra: by hands
08:09 PM robotustra: after, drill, tap, bolt, etc
08:10 PM robotustra: wire, solder, program
08:11 PM robotustra: and finally use it as a cnc lathe
08:11 PM robotustra: I think I'll finish by the summer :)
08:14 PM robotustra: I hope
09:04 PM rue_mohr: those plates are for your sliders then?
09:09 PM robotustra: small ones?
09:10 PM robotustra: big plates are for spindle moint
09:11 PM robotustra: small plates are not for the lathe, they are for mill
09:15 PM robotustra: for sliders I didn't scraped yet
09:15 PM robotustra: for sliders I didn't scrape yet
09:25 PM Tom_shop: ok, got quite a bit done tonight
09:25 PM Tom_shop: pics to come. gotta clean up a mess first
09:26 PM rue_shop3: :)
09:26 PM rue_shop3: if nothing else I admire your get-up-and-go
09:27 PM Tom_shop: i'll go post the pics then come back out and start to clean up
09:27 PM Tom_shop: got quite a mess tonight
09:31 PM rue_shop3: I'm planning on a pi thats set up for taking, uploading, and posting images in one button
09:32 PM rue_shop3: and prolly pasting url to irc
09:32 PM robotustra: accidently you'll post your ass to irc one day
09:35 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly1.jpg
09:35 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly2.jpg
09:35 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly_Down.jpg
09:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly_Up.jpg
09:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly_front.jpg
09:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Motor_Mount1.jpg
09:36 PM Tom_L: ok back out to clean up
09:39 PM rue_shop3: robotustra, yea, but it'll be a shiney metal ass and I"ll decide it was for the best
09:39 PM Tom_shop: is my server slow tonight?
09:39 PM rue_shop3: Tom_L, nice
09:39 PM rue_shop3: nope
09:40 PM rue_shop3: and how you gonna tension that belt again?
09:40 PM Tom_shop: it's becoming a larger pile of junk day by day
09:40 PM rue_shop3: :)
09:40 PM Tom_shop: probably slide it sideways
09:40 PM Tom_shop: i did that for a quick mock up
09:40 PM rue_shop3: if you turn the motor 180 to protect the cables when done
09:41 PM Tom_shop: yeah
09:41 PM rue_shop3: :) gonna be hell gettin those screws in
09:41 PM Tom_shop: no
09:41 PM Tom_shop: from inside the tube
09:41 PM rue_shop3: ? do tell
09:41 PM Tom_shop: think outside the box
09:41 PM rue_shop3: no, the machine side of the motor
09:41 PM Tom_shop: those aren't bad
09:41 PM Tom_shop: allen wrench fits in there
09:42 PM Tom_shop: there _will_ be an order of assembly though
09:42 PM rue_shop3: :)
09:42 PM rue_shop3: I love it when I find out that somehting I designed works, but cant be assembled
09:42 PM Tom_shop: i'm surprised how well it moves really
09:42 PM rue_shop3: is it almost backdrivable?
09:42 PM Tom_shop: i can turn it up and down with one finger on the pulley
09:43 PM Tom_shop: almost falls by itself
09:43 PM rue_shop3: yea
09:43 PM rue_shop3: THATS why you use ball drive
09:43 PM * rue_shop3 sobs that he has none
09:44 PM Tom_shop: i spent a good amount of time on the rails and ballscrew mounts
09:44 PM Tom_shop: need to shim .023" when i mill them flat
09:44 PM rue_shop3: nice
09:44 PM Tom_shop: i'll have him take that off
09:44 PM rue_shop3: it looks awesome tom
09:45 PM Tom_shop: even better in person :)
09:45 PM rue_shop3: p.s. new gloves
09:46 PM Tom_shop: those are the good ones
09:46 PM rue_shop3: :S
09:46 PM rue_shop3: I ditch them shortly after they wear thru
09:46 PM Tom_shop: you remember not to pick up hot metal with the right hand though
09:47 PM rue_shop3: yea
09:47 PM Tom_shop: lookin at the pics, gawd what a mess
09:47 PM rue_shop3: when your done, you should throw togethor a 3d printer :)
09:47 PM rue_shop3: haha
09:48 PM Tom_shop: naw
09:48 PM rue_shop3: it always looks more a mess when not in person
09:48 PM rue_shop3: look around your shop in a mirror, might shock ya
09:49 PM robotustra: what block is it?
09:49 PM Tom_shop: i may change the motor mount around a little. i'll think about it a while
09:49 PM Tom_shop: block?
09:49 PM robotustra: linear bearings
09:49 PM Tom_shop: 20mm
09:50 PM Tom_shop: 16mm screws
09:50 PM robotustra: and what is the travel distance?
09:50 PM * rue_shop3 wonders if he has any chance of beating tom to the finish line on a cnc machine
09:50 PM Tom_shop: 8.25 max probably
09:50 PM Tom_shop: inches
09:51 PM robotustra: after you will weld it?
09:51 PM Tom_shop: that's the travel i have for Z
09:51 PM Tom_shop: depending on the tool i may or may not need it all
09:52 PM Tom_shop: like a shell mill will need to be further down than a drill bit
09:52 PM Tom_shop: and if i put a vise on the table i'll still have room
09:52 PM robotustra: 20 cm
09:52 PM robotustra: ok
09:52 PM rue_shop3: vise, yea, the overhead piles up fast
09:52 PM robotustra: what spindle are you planning to yse?
09:53 PM robotustra: use
09:53 PM rue_shop3: the sherline one
09:53 PM rue_shop3: for now
09:53 PM Tom_shop: i'm not sure yet
09:53 PM Tom_shop: ^^
09:53 PM rue_shop3: for now
09:53 PM rue_shop3: ^^
09:53 PM rue_shop3: :)
09:53 PM Tom_shop: i've been looking at a few
09:53 PM rue_shop3: yea, the ones you posted made me drool good
09:53 PM rue_shop3: wasn't one of them mt2?
09:54 PM Tom_shop: not that i know of
09:54 PM rue_shop3: hmm
09:54 PM rue_shop3: I need a piece of material to make a mt2 from
09:55 PM robotustra: well... if I would be crazy man I would buy this one https://www.ebay.com/itm/Cast-Iron-Machined-Surface-Plate-Riser-Block-9-x-14-1-4/351977645697
09:55 PM rue_shop3: ok, I made the 'nozzel' for my solder feeder
09:56 PM robotustra: and this one "coin" https://www.ebay.com/itm/Lapping-plate/231598188925
09:56 PM Tom_shop: a dude i chat with in england has his own castings made
09:56 PM rue_shop3: ouch$
09:56 PM Tom_shop: considering, it's not that expensive really
09:57 PM Tom_shop: he does up all the moulds
09:57 PM Tom_shop: he's done quite a few
09:57 PM robotustra: cast iron?
09:58 PM Tom_shop: yes
09:58 PM robotustra: what volume of parts?
09:58 PM Tom_shop: small
09:58 PM robotustra: cast iron stuff bends with the time
10:01 PM robotustra: Tom_shop, I would put some ribs on the borrom plates
10:01 PM robotustra: bottom
10:01 PM Tom_shop: i plan to do that
10:01 PM robotustra: ok
10:01 PM Tom_shop: or triangles or something
10:01 PM robotustra: because holes are too far from stands
10:02 PM Tom_shop: you mean cross braces?
10:03 PM robotustra: I mean the bottom plate and the rectangular tube
10:03 PM robotustra: I would put some triangles
10:04 PM Tom_shop: that bottom plate is just something i'm sitting it on
10:04 PM robotustra: because the spindle weight will tend to bend it towards the table
10:04 PM Tom_shop: it's not part of it
10:05 PM robotustra: I mean the plate with holes which is welded to the tube
10:05 PM robotustra: with 6 holes
10:05 PM Tom_shop: oh, you haven't seen that...
10:07 PM robotustra: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly2.jpg
10:07 PM Tom_shop: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Welding/Column_Supports1.jpg
10:07 PM robotustra: I mean the plate where file is
10:07 PM Tom_shop: those will go there
10:07 PM robotustra: ah
10:07 PM Tom_shop: but i'm waiting
10:07 PM robotustra: that's what I mean
10:08 PM Tom_shop: no, i didn't forget
10:08 PM robotustra: this stuff will be crooked after welding
10:09 PM Tom_shop: it surprisingly hasn't moved very much
10:09 PM robotustra: this machinary building pushing me to buy a house
10:13 PM robotustra: cool https://www.ebay.com/itm/DOALL-BLACK-GRANITE-SURFACE-PLATE-GRADE-B-0016-ACCURACY-8x4x10-STAND/221068479569
10:16 PM Tom_shop: that's about the size of my friends
11:08 PM rue_shop3: boiler lines froze, not good
11:08 PM rue_shop3: trying to thaw
11:10 PM Tom_L: don't you antifreze them?
11:15 PM rue_shop3: 100 gal of antifreeze?
11:15 PM Tom_L: well if it would keep it from freezing and causing a catastrophy yes
11:16 PM rue_shop3: and i'd lose it every time there was leak
11:16 PM rue_shop3: and it would cost waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay more than the gas I'm avoiding to heat the house with
11:16 PM Tom_L: hmm, well i'd try to prevent leaks
11:16 PM rue_shop3: I'm suppose to watch and bump the temp if it gets too cold
11:16 PM rue_shop3: the cold snuck up on me
11:16 PM Tom_L: yeah i'm sure it would cost quite a bit
11:16 PM rue_shop3: about $3000
11:17 PM Tom_L: doesn't it freeze up on ya at least once a year?
11:17 PM Tom_L: ok, is the boiler in the shed?
11:17 PM Tom_L: and you insulated the shed right?
11:17 PM Tom_L: would a 100W bulb keep the shed from freezing?
11:22 PM rue_shop3: no the boiler, the 100gal tank and the pumps are not in the shed
11:23 PM rue_shop3: if I keep the system running it wont freeze
11:23 PM Tom_L: what keeps it goin when you're away?
11:24 PM Tom_L: have you calculated how much you save using it?
11:24 PM rue_shop3: the house rad sprung a leak, its saving enough money
11:24 PM Tom_L: i'm sure it's substantial
11:25 PM rue_shop3: so I'm not using it theis year cause I couldn't organize a new rad
11:25 PM rue_shop3: 15off
11:27 PM Tom_L: i'm kinda surprised i got that far tonight
11:32 PM rue_shop3: its awesome tom
11:32 PM rue_shop3: mock the sherline head up on it eh?
11:32 PM Tom_L: i gotta make a mount for that first
11:32 PM Tom_L: that might take a bit
11:33 PM Tom_L: i haven't looked at it that close yet
11:33 PM rue_shop3: should just be 4 screws
11:33 PM Tom_L: it's not the same as yours
11:33 PM Tom_L: remember?
11:38 PM Tom_L: http://www.cadcamcadcam.com/mountadaptorforsherlineheadstocktoimservicecncrouter.aspx
11:38 PM Tom_L: uses a center pin and a screw tightens in from the side to the wedge in the pin
11:39 PM Tom_L: and the keyway keeps it at 90 degrees
11:39 PM Tom_L: so i need to make one of those spacer blocks
11:46 PM rue_shop3: I think it just opened up
11:46 PM rue_shop3: oh yea
11:46 PM rue_shop3: yea
11:46 PM rue_shop3: go baby go
11:49 PM rue_shop3: 14on
11:49 PM rue_shop3: 15ob
11:49 PM rue_shop3: 15on
11:49 PM rue_shop3: arg
11:52 PM rue_shop3: k, its got 100Gal of water to go from 4c to 80c
11:54 PM rue_shop3: and I have 8 12V batteries to recharge
11:58 PM rue_shop3: whent he temp gets cold, the system is supposed to pulse the pumps to keep the water moving
11:58 PM rue_shop3: but its not meant to catch -2.5c
11:58 PM rue_shop3: and the system wasn't going for some reason, I thought it had been