#linuxcnc Logs

Dec 03 2017

#linuxcnc Calendar

01:12 AM XXCoder: nice https://www.youtube.com/watch?v=z7mo6ZwlF6w&feature=em-uploademail
01:17 AM gloops: cant fit one on my lathe atm, britannias ingenious tool levelling ramps restrict the height/thickness of the tool severely - 10mm tool max
01:19 AM IchGucksLive: hi
01:20 AM gloops: morning
01:21 AM XXCoder: gloops: fit what?
01:21 AM IchGucksLive: Snow on gound overnight
01:21 AM gloops: i cant fit quick change toolpost
01:21 AM XXCoder: ahh
01:22 AM IchGucksLive: can someone explain toolpost is this a toolchanger item
01:22 AM gloops: the toolpost is the part where the tool is secured, on a lathe
01:24 AM gloops: i cant change mine, it has ramps to allow quick tool height adjustment, but the ramps are part of the casting, nothing else can fit
01:24 AM gloops: unless i made something
01:24 AM IchGucksLive: ok thanks im not a lathe man at all
01:25 AM XXCoder: me either
01:25 AM XXCoder: i ran cnc lathe rarely but never setup
01:25 AM XXCoder: I ran cnc lathe maybe 5 times total over 2.5 years
01:26 AM XXCoder: and manual mill only once lol
01:26 AM XXCoder: fanastic lens assembly on second video
01:27 AM gloops: well, got to install windows on another drive to run something bbl
02:07 AM Deejay: moin
02:55 AM IchGucksLive: XXCoder: Freecad hi how do i add a new python to a list is there a file that holds a list
02:55 AM IchGucksLive: XXCoder: ia added a new post
02:55 AM XXCoder: im not too sure what you mean
02:55 AM IchGucksLive: but it is not in the list
02:55 AM XXCoder: im not too advanced freecad user unfortunately
02:56 AM IchGucksLive: k its on python
02:56 AM IchGucksLive: "/usr/lib/freecad-daily/Mod/Path/PathScripts/post
02:56 AM IchGucksLive: if i add a post there
02:56 AM IchGucksLive: how does it appear in the post list to select
02:57 AM XXCoder: oh never used python scripts on freecad at all
03:03 AM IchGucksLive: ok i can choose CHOOSE a Post and then it works
03:03 AM IchGucksLive: si i guess there is a list of posts in PATH
03:04 AM IchGucksLive: i need to add the own post
03:04 AM IchGucksLive: i wait if sliptonic is answering some day
03:05 AM XXCoder: ok
03:05 AM IchGucksLive: maybe same as cmorly dident answers on 7i92
03:05 AM IchGucksLive: NP for me
03:14 AM IchGucksLive: got it
03:14 AM IchGucksLive: choosed to choose thne saved and reopend and it is there
03:20 AM XXCoder: nice
03:51 AM XXCoder: heyy found ponentally great channel thats also captioned
03:52 AM XXCoder: switch & lever
03:52 AM XXCoder: https://www.youtube.com/watch?v=2rk7DJ6p-nQ
05:15 AM Contract_Pilot: XXcoder one day soon i will get my lathe going... i hope very soon
05:15 AM XXCoder: nice
05:15 AM Contract_Pilot: My 3phse stepper should be here end of the week
05:16 AM Contract_Pilot: Hope Path Pilot 2.0 will be out so i can get it set up 1 time...
05:16 AM XXCoder: cnc lathe?
05:16 AM Contract_Pilot: Yep CNC lathe
05:17 AM Contract_Pilot: been building it and changing config gfor about 3 years now ahaha.
05:17 AM XXCoder: lol yea
05:17 AM XXCoder: my cnc router is as lonmg
05:17 AM XXCoder: its on hold as I dont have room anywhere to setup and run it
05:17 AM Contract_Pilot: Got a good deal on a tormach 1100 mill so i scrapped the 704 Conversion
05:18 AM Contract_Pilot: I tore out the faimly room made it back in to a garage hahaha
05:19 AM XXCoder: cool
05:19 AM XXCoder: hows tormach
05:19 AM Contract_Pilot: made chips one with it just to check it but busy with the home stuff and tooling
05:20 AM XXCoder: cool
05:20 AM Contract_Pilot: http://www.stevenrhine.com/?p=1990
05:21 AM jthornton: morning
05:27 AM XXCoder: wow
05:27 AM XXCoder: you had to undo conversion in order to make more garage room eh
05:31 AM Contract_Pilot: Yep..
05:32 AM XXCoder: we planned to add concerete fountain at yard in order to build a shop
05:32 AM XXCoder: but what with current issues on house I doubt we can do it in 2018
05:33 AM XXCoder: im pretty sure I used wrong word lol. the concerete slab on ground
05:34 AM jthornton: when you do build make sure the ground is solid and your footer goes beneath the frost line
05:35 AM XXCoder: hmm I dont think frost line exists here lol
05:35 AM XXCoder: this region its maybe 3 inches of soil then bedrock
05:35 AM XXCoder: unless someone had dug em up and made deeper soil, an expensive fix
05:35 AM jthornton: bedrock is good
05:36 AM XXCoder: yeah. anyway here soils like that ebcause of ancient GIANT ice dam
05:36 AM XXCoder: it was holding large amount of water, and it broke
05:36 AM XXCoder: it washed most of soil away
05:40 AM gloopsr: if a concrete raft is no good it needs pilings
05:41 AM jthornton: what do you call a roof built like this http://gnipsel.com/images/chickens/coop15.jpg
05:41 AM XXCoder: barn?
05:41 AM XXCoder: honestly no idea lol
05:41 AM gloopsr: 2 roofs ?
05:41 AM XXCoder: looks great tho
05:43 AM archivist: that will have some farm related name
05:43 AM gloopsr: top is a dual pitch, onto 2 single pitch roofs, unless there is a specific name for that style, i dont know
05:44 AM jthornton: I found it the other day on wikipedia
05:45 AM gloopsr: dormer?
05:45 AM archivist: dormer is like people do bedroom windows
05:45 AM XXCoder: gloopsr: does it count if it goes all way though roof?
05:46 AM XXCoder: and yeah usually bedroom windows on upstairs
05:46 AM gloopsr: yeah dormer usually refers to a window in a roof
05:46 AM gloopsr: dont know im not an architect lol
05:46 AM XXCoder: it seems its rarely well done on rich houses aka mcmanision
05:47 AM archivist: buuut I am part way through fitting first new window....
05:47 AM gloopsr: A dormer is a roofed structure, often containing a window, that projects vertically beyond the plane of a pitched roof.[1]
05:48 AM jthornton: https://i2.wp.com/www.housestormborn.com/wp-content/uploads/2015/06/Monitor-Roof.png
05:48 AM _methods: i think that's called a gambrel roofed barn
05:48 AM XXCoder: https://youtu.be/lQRktJtrgHs if anyone wants elio but concerned about snow perforance
05:48 AM jthornton: https://en.wikipedia.org/wiki/Monitor_(architecture)
05:48 AM gloopsr: yes monitor comes up with that
05:48 AM _methods: ahh monitor
05:48 AM _methods: yeah ignore gambrel
05:49 AM archivist: jthornton, is that where you put the monitor lizard
05:49 AM XXCoder: ohh fancy computer montior chicken coop
05:49 AM gloopsr: rare in the UK
05:50 AM jthornton: XXCoder: now all they have to do is build some?
05:50 AM gloopsr: mansard is pretty common
05:50 AM XXCoder: lol
05:50 AM _methods: i think they stored hay along the center aisle in the roof then the animals on pens to the outside of the barn
05:50 AM _methods: i'm assuming it makes it easier to distribute hay to pens
05:51 AM gloopsr: a lot of the old farmhouses here animals were keep on the ground floor - people lived above
05:53 AM _methods: just drop a bail down when they need new hay
05:53 AM _methods: hay stays nice and dry off the ground up above
05:55 AM Contract_Pilot: 1 more window to replace and a patio slider then all single pane aluminum are gone.
05:55 AM Contract_Pilot: have to remove one 6' x 3' due to mfg flaw also
05:56 AM Contract_Pilot: but repolacement is waiting at the window store.
06:33 AM Contract_Pilot: Darn cat learnd to open doors....
06:33 AM Contract_Pilot: Annoying...
06:54 AM XXCoder: lol
07:02 AM IchGucksLive: hi
07:05 AM XXCoder: wb
07:15 AM Contract_Pilot: I am impatient
07:16 AM Contract_Pilot: 2017-12-02 Saturday
07:16 AM Contract_Pilot: 15:00:22 Loading at 【Hongkong General Distribution Centre】, being delivered to 【Los Angels Gateway】
07:17 AM XXCoder: I have easy solution for you
07:17 AM XXCoder: break in steal your package
07:18 AM Contract_Pilot: Ahhhh
07:54 AM Contract_Pilot: hope for no rain today...
08:25 AM Contract_Pilot: Sunday Sunday Sunday
08:25 AM IchGucksLive: noone workes beside us
08:31 AM Tom_L: ridge cap roof style
08:32 AM Tom_L: generally not that pronounced
08:49 AM JT-Shop: morning Tom_L
08:49 AM Tom_L: hey
08:50 AM Tom_L: rethinking my mill design a bit
08:50 AM Tom_L: more similar to commercial vmc with a column
08:50 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Column_Mill_Design.jpg
08:50 AM Tom_L: still working on it a bit
08:52 AM Contract_Pilot: tom will be gool when done
08:53 AM Contract_Pilot: Getting below freezing outside.
08:53 AM Tom_L: kinda designing around the scrap steel i can find
08:54 AM Tom_L: well, they have 2" plate or thicker but i don't think it'll fit in the trunk..
08:56 AM SpeedEvil: Get a 4'*8' sheet and weld wheels to it
08:59 AM * JT-Shop studies the new design
09:05 AM gloopsr: has it got to be like a bench top design Tom?
09:06 AM gloopsr: in fact no doesnt matter, thought i had wouldnt make any difference#
09:11 AM Tom_L: needs to fit on a bench yes
09:11 AM Tom_L: 6 or 8" column depending on what i can find
09:11 AM gloopsr: cant see the upright or table side bending, all the stress is where they meet, the joint, something i saw - but havent done on mine, where bolting box section - they put a piece of heavy flat bar inside the box section tapped out and bolt through to that, could be something done later if there is any movement
09:12 AM Tom_L: i thought about that already
09:13 AM gloopsr: suppose it has to help stiffen things up if its needed
09:13 AM Tom_L: the 2" alone is stronger than my sherline
09:13 AM Tom_L: which is really all i'm after
09:14 AM SpeedEvil: The edges of a box are enormously more stiffening than the centre
09:14 AM SpeedEvil: If that's what you're meaning by putting a heavy flat bar in
09:14 AM Tom_L: SpeedEvil i think he means a backing plate
09:14 AM gloopsr: am watching with interest, if yours is a success i might have a go at one next year
09:15 AM JT-Shop: too bad you don't live near me I have some 6" square and 4" x 8" all 1/4" wall
09:15 AM Tom_L: JT-Shop i think the scrap has it, it's just in long lengths they wont cut
09:15 AM gloopsr: SpeedEvil yeah but the bolt is in the middle, i mean i doubt it would be necessary, mine was originally only 3mm wall though, i was gonna use the flat bar method
09:16 AM Tom_L: i'll at least try to fit nuts inside the tube
09:16 AM gloopsr: by chance got some thicker wall box local for the key parts
09:16 AM * SpeedEvil ponders a buisness that ships you polystyrene formers for mills, and a DIY cast iron melty kiln.
09:16 AM Tom_L: now wouldn't that be nice
09:17 AM SpeedEvil: Fill box with sand, tamp it down, pour in cast iron.
09:17 AM gloopsr: should get the nuts in there Tom, slow job nipping them up
09:17 AM Tom_L: i think i can talk my bud into squaring it all up once it's ready
09:17 AM SpeedEvil: Add dotted lines to saw if you ever need to take it apart.
09:18 AM gloopsr: fill box with sand - bake the sand or risk having your face blown off lol
09:18 AM gloopsr: use ladle with 6ft handle
09:18 AM Tom_L: we used to have a foundry not that far from me
09:19 AM Tom_L: i don't think there are any here nowdays
09:20 AM gloopsr: well i live in Rotherham, side of Sheffield, place was one big ironworks, 99% gone
09:20 AM Tom_L: they're all over smoking up china's sky now
09:21 AM gloopsr: id have them back
09:21 AM SpeedEvil: Well, with any luck, industry will return to the UK, as the GBP slides to south of the Yuan.
09:22 AM SpeedEvil: :/
09:22 AM gloopsr: SpeedEvil the UK is opening a new chapter in industry
09:23 AM SpeedEvil: Then there is the awkward reality that new facrtories in the UK will be very highly CNCd, and have very few jobs for the level of investment.
09:24 AM gloopsr: true, highly unlikely there will be any return to smokey chimneys
09:24 AM Tom_L: i really wonder if the initial investment and maintenance cost offsets labor cost
09:25 AM Tom_L: and all the electrical expenditure
09:25 AM gloopsr: the first thing is to get energy prices down, we have to pull out of the EU clean air act
09:27 AM SpeedEvil: Tom_L: If you can work three shifts on a machine, and count the wages and employee costs and ..., you end up with a really large number for a relatively few numbers of workers doing a task, even at minimum wage.
09:27 AM SpeedEvil: meaning spending a million on a new machine can look quite cheap.
09:28 AM malcom2073: We have a machine shop in our building, with million+ dollar machines, and like 5 guys working 30 machines or so
09:28 AM SpeedEvil: Especially of course if your spending a million on automating that machine lets you now put it in a hundred factories at 100K per
09:28 AM malcom2073: Their manual machines sit unused 99.9% of the time
09:29 AM Tom_L: i ran 6 cam driven ones at one place
09:29 AM malcom2073: I'm fairly certain most of hte guys on the floor are just cnc operators, and don't actually know *how* to machine
09:29 AM gloopsr: https://www.youtube.com/watch?v=4kN5iqVO67g automated fibre laser
09:29 AM Tom_L: they replaced some with cnc and crashed them right off the bat
09:30 AM Tom_L: the company setting them up that is..
09:30 AM gloopsr: you need an attendant to watch the screen, and a fork lift driver
09:30 AM SpeedEvil: gloopsr: or an attendant to watch many screens
09:30 AM Tom_L: and a cute secretary to gawk at so you don't fall asleep
09:31 AM gloopsr: replaces a gang of skilled profile burners, dozens of labourers, pattern makers and so on
09:31 AM Tom_L: having to think keeps you alert
09:31 AM SpeedEvil: The hidden cost removal of a machine like that is also interesting
09:31 AM SpeedEvil: in that there are no tools, tool wear issues, metrology issues, QC, ... (to a degree at least)
09:32 AM gloopsr: no foremen sat on their ass
09:33 AM gloopsr: china cannot beat that, they might still be the cheapest supplier of lower grades iron but thats all
09:34 AM SpeedEvil: Automation is happening in a big way in china too
09:35 AM gloopsr: who can get any advantage though?
09:35 AM archivist: that makes for a lot of unemployed chinamen, revolution
09:35 AM SpeedEvil: https://apple.slashdot.org/story/16/12/30/1814233/foxconn-boosting-automated-production-in-china
09:35 AM gloopsr: they have to ship
09:35 AM SpeedEvil: gloopsr: which matters if it's time-sensitive or very, very heavy
09:38 AM SpeedEvil: And 'time sensitive' becomes 'time sensitive and customised' if it's warehousable in the uk
09:38 AM SpeedEvil: (or wherever)
09:43 AM gloopsr: the UK is also ahead with software and design - that kind of support industry could flourish
09:43 AM Contract_Pilot: bbl
09:43 AM SpeedEvil: Yeah. As long as there are no trade barriers with the rest of the EU, that could be a good new direction.
09:53 AM gloopsr: unlikely there will be trade barriers, 1 in 7 german cars are sold to the UK, 6/10 germans work in auto industries, they would take a bigger hit than us
09:55 AM archivist: they make lots of their engines north of brum at hams hall
09:57 AM sync: austria will just take over
09:57 AM gloopsr: it was criminal to ever let them here
09:57 AM sync: they only make 400k engines there
09:58 AM archivist: http://www.bmw-plant-hamshall.com/facts-figures/plant-overview/factory-data.aspx
10:05 AM archivist: gloopsr, note how we are already cleaner than the EU http://www.bbc.co.uk/news/science-environment-42196752
10:07 AM gloopsr: yes i think germany had to build about 20 emergency coal fired plants to prop up the grid after its wind disaster
10:08 AM gloopsr: we have a lot of potential for hydro power here i dont know why we arent exploiting it
10:09 AM archivist: it uses all the valleys that the greens want to hug
10:14 AM sync: gloopsr: no we did not
10:15 AM sync: it is not like you can just build a coal fired plant quickly
10:15 AM sync: also interesting that hamshall is ramping down
10:16 AM * Loetmichel just illuminated the balconies... pretty... -> http://www.cyrom.org/palbum/main.php?g2_itemId=16074&g2_imageViewsIndex=1 (just a bit mor snow this year)
11:29 AM IchGucksLive: hi
12:21 PM IchGucksLive: im off gn8
12:29 PM Elmoo42: Tom_L, what are the XYZ travels of your design?
12:36 PM Elmoo42: Tom_L, is the Y going into the column like that?
12:36 PM Elmoo42: I don't quite understand how Y-axis works...
12:37 PM Elmoo42: because it sticks out of the column a lot, so the table moves. but is it enough for the table to move from corner to corner?
12:50 PM gloopsr: 20 quid surface grinder still no interest https://www.ebay.co.uk/itm/Surface-Grinder-single-phase/332466292957?
12:53 PM hazzy: I like the vertical spindle with the cup wheel, don't see those here in the states
12:53 PM roycroft: i might be interested, but it doesn't post to the us
12:53 PM SpeedEvil: I'd want it.
12:53 PM roycroft: of course, if it did, it would cost £1600 or so
12:53 PM SpeedEvil: But, delivery
12:54 PM roycroft: too bad china post don't operate out of the uk
12:54 PM roycroft: i could get it shipped for £1.99
12:54 PM SpeedEvil: In one layer of bubble-wrap, dropped 8 feet several times
12:56 PM gloopsr: bout 70 mile from me, probably 40 quid in juice
12:56 PM roycroft: scrap metal value has to be at lest £20
12:56 PM Tom_L: Elmoo42, the newer design will give more overall Z travel
12:57 PM gloopsr: maybe a scrap man whos bid roy
12:57 PM Tom_L: because the whole head will move up and down
12:57 PM Tom_L: instead of having an arm sticking out
12:57 PM Tom_L: (stationary)
01:09 PM Tom_L: i'm figuring on around 9-10" in y, around 18-20 in X and unsure about Z just yet because of the changes
01:10 PM Tom_L: most VMC's are made in a similar fasion
01:12 PM Tom_L: the Y screw is 500mm, Z is 400, X will be around 700ish
01:24 PM gloopsr: https://www.ebay.co.uk/itm/elliot-victoria-drill-press-milling-machine/152811812359?
01:24 PM gloopsr: not sure what that is, drill/mill
01:25 PM hazzy: That is the first propane powered mill I have seen
01:29 PM gloopsr: too far for me, pity
01:29 PM Tom_L: looks somewhat used up
01:30 PM gloopsr: nah just needs some yellow paint
01:32 PM gloopsr: probably quicker to build one than clean that lol, its all there though, got x y travel, sturdy thing
02:22 PM gloopsr: Q) is a stepper motor, say 270 or 420 oz enough to use on the spindle of a small metal lathe?
02:22 PM gloopsr: any reason why you couldnt?
02:24 PM jdh: they are coggy and have little torque at high speeds
02:26 PM malcom2073: My father has a tabletop lathe that uses 420oz nmea23's
02:26 PM malcom2073: Works pretty good
02:27 PM gloopsr: does he do stuff like thread cutting malcolm2073 - like fairly precision stuff
02:30 PM gloopsr: or what about servo for spindle and steppers for x/z very cheap little lathe down the road, i might have a play with it
02:31 PM malcom2073: He hasn't gotten thread cutting working yet, the spindle has an encoder but he needs to hook up his 5i25 to run it
02:32 PM gloopsr: ahh right, yeah that was mainly what i was wondering - can it be done without an encoder, just stepping
02:32 PM malcom2073: You need something on the spindle to tell you RPM
02:32 PM gloopsr: yes
02:32 PM malcom2073: regardless of if you use steppers or servos
02:33 PM malcom2073: afaik, you also need an index pulse as well on the spindle
02:33 PM gloopsr: that was the main thing, if i could do it cheap to mess around and learn a bit, but if it starts getting expensive would probably use a lathe worth fitting up
02:34 PM malcom2073: Yeah then stay away from servos on a small machine, they aint cheap heh
02:34 PM gloopsr: its only about 10 inch between centres
02:34 PM malcom2073: That being said, a lot of small lathes come with steppers anyway, so it's pretty much the cost of a driver to hook up
02:35 PM malcom2073: OH
02:35 PM malcom2073: shit
02:35 PM malcom2073: I totally misread your question
02:35 PM malcom2073: You were talking about using a stepper for the spindle
02:35 PM malcom2073: Yeah no, I wouldn't do that.
02:35 PM gloopsr: ok lol
02:35 PM malcom2073: I thought you meant for the travel for some reason
02:36 PM gloopsr: well steppers for travel and spindle
02:36 PM gloopsr: suppose the size of the lathe is irrelevant, its still cutting metal
02:36 PM malcom2073: You shouldn't use a stepper for the spindle
02:37 PM gloopsr: what would be the cheapest way to do the spindle?
02:37 PM Tom_L: i wouldn't use a stepper for a spindle drive
02:37 PM gloopsr: use the old motor for power and an encoder?
02:37 PM jdh: whatever cheap motor you have
02:37 PM malcom2073: Get yourself a small induction motor, 1/4hp or so
02:37 PM Tom_L: treadmill motor
02:37 PM Tom_L: copier motor
02:37 PM malcom2073: treadmill motors are good too, variable speed
02:38 PM gloopsr: i have seen that yeah Tom, treadmill motor with the speed readout?
02:38 PM gloopsr: how am i synching the spindle with travel though?
02:38 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/motors/motor3.jpg
02:38 PM Tom_L: i thought about using those for one
02:38 PM Tom_L: from copiers
02:38 PM Tom_L: had 2048 encoders but i borrowed them
02:38 PM malcom2073: gloopsr: An encoder
02:39 PM gloopsr: cheapest encoders ive seen are olike £200
02:39 PM Tom_L: i dunno what voltage they are though
02:40 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/new_pulleys/spindle_enc2.jpg
02:40 PM Tom_L: that encoder wasn't no $200
02:40 PM malcom2073: gloopsr: An encoder
02:40 PM malcom2073: oops
02:40 PM malcom2073: gloopsr: Don't buy new! :P
02:40 PM jdh: make one
02:40 PM Tom_L: i got those off surplus medical equipment
02:41 PM Tom_L: i sure tend to say 'surplus' and 'scrap' alot lately :)
02:41 PM gloopsr: jdh well, i have looked at that briefly, is it really doable
02:42 PM jdh: sure. disc with cutouts and a cheap sensor.
02:42 PM gloopsr: Tom the thing is i dont really know what to look for, i wouldnt recognise an encoder in a pile of surplus
02:42 PM Tom_L: gloopsr i wouldn't know if i could make a mill until i do it
02:42 PM Tom_L: then get educated on it
02:42 PM Tom_L: then look
02:43 PM gloopsr: you better be ready for a lot of questions in here then lol, i can make the mechanical aspects no problem, but the wiring...
02:44 PM Tom_L: https://www.ebay.com/itm/OMRON-E6B2-CWZ6C-Rotary-Encoder-1000P-R-New/252856681203?hash=item3adf6ec2f3:g:Wv8AAOSw4CFY7ETx
02:44 PM Tom_L: first hit there's one for sixteen bux
02:44 PM Kevin`: a large bldc motor would be nice for spindle drive as they always have position encoding. likely more expensive than a used induction motor though
02:46 PM Tom_L: https://www.ebay.com/itm/Cytron-Simple-Rotary-Encoder-Kit/112597569732?hash=item1a375690c4:g:wREAAOSwh1paIYq0
02:46 PM Tom_L: something like that would work on a spindle
02:46 PM Tom_L: probably
02:46 PM SpeedEvil: Kevin`: they typically only have several-many per rev though
02:46 PM gloopsr: https://www.ebay.co.uk/itm/360P-R-Incremental-Rotary-Encoder-AB-phase-encoder-6mm-Shaft-With-coupling/292350925148?
02:46 PM gloopsr: like that?
02:47 PM Tom_L: yeah you might want one with an index pulse too though
02:47 PM Kevin`: SpeedEvil: you can a decent position accuracy with smart software, but it's best at speed of course, as are the motors themselves (torque-wise)
02:47 PM Tom_L: for spindle synch etc
02:47 PM Tom_L: A B & X or such
02:48 PM gloopsr: index pulse, whats that?
02:48 PM Tom_L: once a rev it pulses
02:48 PM gloopsr: so a hole in a disc with optical sensor kind of thing
02:49 PM Tom_L: sortof yes
02:50 PM Tom_L: https://www.ebay.com/itm/AVAGO-Optischer-Encoder-3-Channel-HEDS-5540-A11-4mm-1-Stuck/311599626861?hash=item488cc8fa6d:g:fr8AAOSwhpZaBDig
02:50 PM Tom_L: another style
02:50 PM Tom_L: those are HEDS
02:50 PM Tom_L: same as what came off the motors i posted
02:50 PM gloopsr: http://www.ebay.co.uk/itm/EU-UK-Nema23-Brushless-DC-Motor-3000RPM-188W24V-3PHS-57BLF03-Driver-BLDC-8015A/282725639429?
02:51 PM Tom_L: https://www.ebay.com/itm/ENCODER-3CHANNEL-500CPR-5MM-Part-AEDB-9140-A14/352000265070?hash=item51f4d9cb6e:g:0PcAAOxyiRlSa72F
02:51 PM Tom_L: see the index mark?
02:51 PM gloopsr: those are a bit like abs sensors
02:52 PM gloopsr: yes can see the mark
02:54 PM Kevin`: gloopsr: read the docs for that motor driver to be sure it gives some sort of output feedback, not all do. if it didn't you'd have to add a seperate encoder, which is kind of silly for spindle. makes sense for axis though
02:58 PM gloopsr: yes some studying is going to be needed thanks
03:02 PM gloopsr: first link - how to make an encoder out of a tin can and turn a car screen wiper into a powerful servo lol
03:02 PM gloopsr: could cost less than i thought
03:08 PM Tom_L: just depends what you're after
03:18 PM gloopsr: think treadmill setup might be my best bet, ill watch a few vids
03:25 PM Kevin`: old interesting video: https://www.youtube.com/watch?v=5QIjhmtY5ok
03:26 PM Kevin`: first I saw with zero-speed sensorless feedback
03:34 PM Tom_L: oh
03:34 PM Tom_L: also wheelchair motors
03:34 PM Tom_L: gloopsr ^^
03:34 PM Tom_L: but they'd be lower voltage
03:34 PM Tom_L: 12 24 48 i dunno
03:35 PM gloopsr: ive seen those mentioned as well Tom in forums, never paid much attention
03:35 PM Tom_L: yeah i just bought a new spindle motor for the Mrs., just waiting patiently for it's intended purpose :)
03:47 PM gloopsr: heh, well bedtime here
03:57 PM Deejay: gn8
04:15 PM XXCoder: new clickspring video!
04:16 PM XXCoder: yo
04:34 PM jdh: I have a treadmill motor, controller, lathe, ball screws, steppers, etc I'll sell you!
04:39 PM XXCoder: that video was amazing
04:45 PM Kevin`: <3 clickspring
04:45 PM XXCoder: yep
04:49 PM Tom_L: jdh you should do something with them
05:19 PM jdh: I am. trying to sell them!
05:20 PM jdh: would also sell my boat, g0704, a bike or two
05:22 PM malcom2073: Boat eh? Going for the happest day of your life selling it? (second happiest being when you bought it)
05:48 PM jdh: it's my 5th or 6th, so....
05:52 PM XXCoder: lol I dont plan to own any boat
05:53 PM Tom_L: i had a boat years ago
05:53 PM Tom_L: almost lost it down the tub drain once :)
05:55 PM XXCoder: oh yeah I have 3 boats
05:55 PM XXCoder: all 3d benchy
05:58 PM Tom_L: https://www.youtube.com/watch?v=0my702Jy2S4
05:59 PM XXCoder: OMG CLICKBAITY title from 2015s!
06:11 PM malcom2073: Lotta idiots there, no wonder sinkholes claim lives
06:12 PM XXCoder: 2 guys walk and suddenly fall in. is those idiots?
06:12 PM XXCoder: though train track guy yeah stupid to stay
06:13 PM malcom2073: The people who stand too close to the edge and then the edge collapses heh
06:13 PM XXCoder: yeah
06:14 PM XXCoder: THE STEEL WORM AWAKES! W̮̺̳̞̗̳O̹͡R͉̬͍Ḿ̭̖̪̹̥Y͙̘̦̦͜A͙̼͘
06:18 PM SpeedEvil: https://www.youtube.com/watch?v=NIdqg31PFTw 49 axis of sound.
06:23 PM XXCoder: https://www.youtube.com/watch?v=iRumO4Ev2RY
06:23 PM XXCoder: matches
06:32 PM malcom2073: That's actually pretty cool
06:32 PM malcom2073: what did he coat the tops with?
06:32 PM XXCoder: he have done some insane things
06:32 PM XXCoder: like make bolt with lathe then mill hex, then another bolt, milled then lathed hex
06:33 PM XXCoder: looks like epoxy
06:33 PM malcom2073: didn't know if it was some sort of flammable thing
06:33 PM malcom2073: would be cool
06:33 PM malcom2073: The kid part at the end was halarious too
06:33 PM XXCoder: heh yeah. you should watch fallout rocket one
06:33 PM XXCoder: https://www.youtube.com/watch?v=JQXWiq-lvkg
06:39 PM XXCoder: malcom2073: the 2 bolts, one made opposite way as other. (this is also presequel to fallout rocket) https://www.youtube.com/watch?v=dDVMwrCv15o
06:41 PM malcom2073: God damn that rocket is nice looking
06:41 PM XXCoder: and on sale 450 usd heh
06:41 PM malcom2073: Lol
06:41 PM malcom2073: I certainly couldn't make it for that price
06:42 PM XXCoder: now check out the presequel to fallout rocket video. more funny than techinical skill though definitely takes skill to amke bolt wrong way.
06:44 PM XXCoder: ebay https://www.ebay.com/itm/Bronze-Fallout-Red-Rocket-cache-/222353753816?hash=item33c55106d8%3Ag%3AygMAAOSwZQRYW4bM
06:45 PM malcom2073: Hah
08:01 PM ziper: do you guys thinking it is reasonable to cut up a 3 blade propeller and make a 2 blade
08:01 PM ziper: how would i get it balanced before putting it back together
08:01 PM Tom_L: no
08:03 PM ziper: I can't find any props that fit this spline with less pitch and the motor isnt getting anywhere close to its powerband
08:22 PM Kevin`: ziper: drill/bore the prop or add a spacer. will be far easier than trying to convert 3 to 2
08:22 PM Kevin`: heck, making a prop from scratch is easier than that =p
08:23 PM ziper: Kevin`, have you done it? why would that be easier than modifying the one I have?
08:25 PM Kevin`: yeah, occasionally. i've done both
08:25 PM ziper: cool, what size?
08:25 PM Kevin`: because you'll have to remove one of the remaining two blades and re-attach it to the hub at a different angle
08:27 PM ziper: right, but wouldnt that be exactly what I would have to do if i was making it from scratch, except twice instead of once? also it has a spline drive and a thru hub exhaust so I think I ought to reuse the hub if i can
08:27 PM Kevin`: when they are made from scratch they start as a single piece of (cast) material, no bonding involved
08:29 PM ziper: I think mine is welded
08:32 PM Kevin`: I admit, i've only done splines in plastic, where you have the easy-out option of forming it using the shaft
08:33 PM evilroot: o.O
08:33 PM * evilroot has done a bunch of props 3d printed
08:33 PM evilroot: Machines seems a bit extreme
08:33 PM evilroot: *machined
08:35 PM ziper: oh, maybe I should mention its for a boat outboard
08:36 PM evilroot: I was referring to the fallout rocket
08:36 PM evilroot: heh