#linuxcnc Logs

Dec 07 2019

#linuxcnc Calendar

12:03 AM _unreal_: could always use a resistor/cap with PWM to get a "smoother" voltage output
12:08 AM _unreal_: and with that now i AM going to bed
12:13 AM ve7it: cheers]\
02:11 AM Deejay: moin
05:58 AM jthornton: morning
06:17 AM XXCoder: hey
06:18 AM XXCoder: man I hate it when I order something and I get something techinically what I ordered but it isnt.
06:18 AM XXCoder: aliexpress. I ordered 6.35mm and got 6mm, and seller ignored me
06:18 AM XXCoder: ok fine I disputed
06:18 AM XXCoder: tried to talk but seller simply said nothing
06:26 AM jthornton: yea that sucks but you gotta do it
06:27 AM XXCoder: yah
06:27 AM XXCoder: its for demo, and I need it done before march
08:38 AM Loetmichel: *PHEW* $me just ripped up enough cardboard boxes to fill a 240 liter recycling bin to get to my side of the Bed... *paper cuts* * out of stamina* MAAAN sometimes i hate Amazon. (and the fact my wife orders so much there)
08:40 AM SpeedEvil: Get swole.
08:41 AM SpeedEvil: Buy amazon.
08:41 AM * SpeedEvil sells campaign idea to Bezos.
08:41 AM Loetmichel: hihi, yes, kinda ;)
08:42 AM Loetmichel: may have to do with the fact that my leatherman knives are both dull and the box cutters disappeared somewhere. so i had to rip the boxes apart by hand
08:43 AM Loetmichel: also with the fact that my wife orderes EVERYthing off amazon and then throws the empty boxes on my side of the bed, so if i want to sleep there i have to clean up the mess.
08:44 AM SpeedEvil: Currently wearing a knife 24*7 that gets used for that. Handy.
08:50 AM Loetmichel: SpeedEvil: i always wear a leatehrman wave. problem: both blades are dull as heck
08:50 AM Loetmichel: time to send it back to get refurbished (again) ;)=
08:51 AM Loetmichel: and the box cutters we had have disappeart SOMEWHERE under that cardboardbox.stack on my side of the bedroom ;)
08:53 AM SpeedEvil: I am pondering adding a tiny sharpening stone on the back of my key, in order to avoid that issue.
08:53 AM SpeedEvil: ~1mm*20*20 diamond stone or something
08:54 AM jymmmm: Good morning folks
08:56 AM SpeedEvil: https://www.aliexpress.com/item/32972064798.html
08:58 AM jymmmm: SpeedEvil: pocket hook sharpener?
08:59 AM SpeedEvil: Or knife
08:59 AM SpeedEvil: Or finger.
08:59 AM SpeedEvil: Fingernail.
09:00 AM SpeedEvil: It would be ineffective for sharpening fingers.
09:01 AM jymmmm: I like mine because it can sharpen serrated knifes too
09:02 AM jymmmm: https://www.buckknives.com/product/diamond-pocket-knife-sharpener/97070-B/
09:02 AM * Loetmichel has never felt the need to sharpen the leatherman blades
09:02 AM Loetmichel: usually they break off before getting dull because i used them as crowbars ;)
09:03 AM jymmmm: SMH
09:03 AM Loetmichel: <- has already sent in that particular wave 4 times
09:03 AM Loetmichel: time for the fifth ;)
09:04 AM jymmmm: Loetmichel: and you HAVE to use the blade as a crowbar, not that there is any other tools on it that might actually work for that
09:04 AM Loetmichel: not at hand ;)
09:04 AM Loetmichel: usually
09:05 AM Loetmichel: ah, ON it. no, there isnt
09:05 AM jymmmm: Loetmichel: Look a 5 pack of crowbars... https://www.amazon.com/RONRONS-Stainless-Crowbar-Multifunction-Survival/dp/B07QGQW814/
09:05 AM Loetmichel: the blades are pretty good at opening HP laser printers and Monitors
09:05 AM Loetmichel: if you know where to stick them
09:06 AM Loetmichel: sometimes i overdo it and break one off though
09:07 AM jymmmm: Loetmichel: You send them back to the USA?
09:07 AM Loetmichel: no, they have a german repair facility
09:07 AM jymmmm: ah ok
09:08 AM Loetmichel: and as it is "lifetime warranty" i tend to use that
09:12 AM _unreal_: arg....
09:12 AM _unreal_: aliexpress isues
09:19 AM jymmmm: Loetmichel: plus shipping costs
09:19 AM Loetmichel: actually: nope
09:19 AM Loetmichel: only for the shipping to the german repair shop
09:19 AM Loetmichel: the way back was always free so far
09:19 AM jymmmm: which is how much?
09:20 AM Loetmichel: 4 eur
09:20 AM Loetmichel: or 5
09:20 AM jymmmm: eh, ok
09:20 AM Loetmichel: maybe you could even send it for 2 eur if you declare it a "warensendung"
09:20 AM jymmmm: farfignugen
09:21 AM Loetmichel: ?
09:21 AM jymmmm: exactly
09:21 AM jymmmm: no clue what a warensendung is
09:21 AM _unreal_: same here
09:21 AM _unreal_: what is a warensendung and a farfignugen
09:21 AM Loetmichel: "Warensendung" is german for "goods shipping" and a kind of "small parcel for letter postage but only for new goods"
09:22 AM jymmmm: ah ok
09:22 AM jymmmm: _unreal_: old VW commercial
09:22 AM _unreal_: hum
09:23 AM jymmmm: https://en.wikipedia.org/wiki/Volkswagen_advertising#Fahrvergn%C3%BCgen
09:23 AM Loetmichel: so that "parcel stamp" is meant for small NEW goods sent across germany (internet shops and stuff), but usually works for other stuff, too
09:23 AM Loetmichel: usually
09:23 AM jymmmm: gotcha
09:24 AM Loetmichel: ah, "fahrvergnügen" means joy of driving
09:24 AM Loetmichel: couldnt decipher it that misspelled, sorry ;)
09:26 AM Loetmichel: ah, btw: made a vid jesterday... MAN i whish that CNC 6040 could do a DOC and feedrate like this in alu.... -> https://www.youtube.com/watch?v=o5Mkmha9ii4
09:28 AM Loetmichel: also: had another "fun" with the machine reconfigured for horizontal milling. that Proxxon FBS240 REALLY doesent like getting shanghaied as a CNC mill spindle... -> https://www.youtube.com/watch?v=Kd9RrLA0X2k
09:28 AM Loetmichel: ... and osha would have had a party ;)
09:29 AM Loetmichel: (had to do only 35 of those laser printer side walls though. nearly took longer to make the fixture than to mill the holes ;)
09:30 AM Loetmichel: i really like that machine enclosure though
09:30 AM Loetmichel: makes for a MUCH cleaner workshop ;)
01:11 PM _unreal_: faaack me!!
01:11 PM _unreal_: just discoveered my vacuum hose was clogged
01:11 PM _unreal_: I went to blow it appart. and the joint left go and blew shit everywhere
01:12 PM _unreal_: hose extention
01:12 PM _unreal_: FAAACK
01:14 PM Inline: you bathed in shit ?
01:14 PM Inline: lol
01:14 PM _unreal_: just HDPE shavings
01:14 PM _unreal_: from Starboard
01:14 PM _unreal_: last thing I expected
01:14 PM _unreal_: was a the hose sections to break apart
01:15 PM CaptHindsight: andypugh: reliability and the controller are questionable for the robot
01:19 PM andypugh: CaptHindsight: Oh, absolutely, I was thinking about it as a way to get experiece with robot kins in LinuxCNC.
01:19 PM andypugh: The controller wouldn’t last long.
01:28 PM _unreal_: time to mill an other one of these L brackets
01:28 PM _unreal_: this time maybe I'll use the correct measurments ;) like + instead of -
01:52 PM _unreal_: now I believe I have setup the tooling path correctly
02:02 PM jdh: did you believe you had done so previously.
02:03 PM _unreal_: ya
02:03 PM _unreal_: I totally went in the worng directions
02:04 PM _unreal_: making an L shape
02:04 PM _unreal_: with mounting holes
02:04 PM _unreal_: its a "" soft "" end stop for the new mill
02:05 PM _unreal_: but one of the rails extrusion doesnt stop 100% to the end of the board. its shy 2mm
02:05 PM _unreal_: so I have to have one of these .5" HDPE stoppers be 2mm + on part of it
02:06 PM _unreal_: and this time I'm bothereing to use a .25" end mill to do the pocket instead of the 1/8th :)
02:06 PM _unreal_: save an hour or so
02:07 PM _unreal_: they are endstop/stand offs for the major aluminum threaded rod
02:07 PM _unreal_: or ball screw
02:07 PM _unreal_: have not made up my mind,
02:07 PM _unreal_: I'm leaning threaded rod
02:12 PM _unreal_: I think i got my numbers right this time
02:18 PM _unreal_: ve7it, hi
02:19 PM _unreal_: ve7it, I just ordered connectors for those motor controllers
02:19 PM _unreal_: I dont have any way of interfacing with the motor part
02:19 PM _unreal_: they will be here mon/tue
02:26 PM _unreal_: ARG... boy did I set the plunge rate low
02:26 PM _unreal_: .75mm per pass cutting out the pass 3/4" thick maybe 8" diam.
02:27 PM _unreal_: sigh
02:27 PM _unreal_: or I should say I didnt note what it was set to
02:28 PM ve7it: _unreal_, good afternoon
02:30 PM _unreal_: hi
02:30 PM _unreal_: well I'm cutting out the last mount for my new home cnc
02:30 PM _unreal_: the only funky one
02:31 PM _unreal_: with luck it will be with in tolerance
02:37 PM _unreal_: jdh, fits like a glove
04:17 PM Tom_itx: spare parts that fit nothing?
04:20 PM Deejay: gn8
04:22 PM _unreal_: Tom_itx, ?
04:23 PM Tom_itx: was reading the scroll back
04:23 PM _unreal_: ok... dont know who you where talking to then in that case :)
04:23 PM _unreal_: I'm so tired of this can only be found in CHINA bull shit
04:29 PM _unreal_: whats new?
04:32 PM justan0theruser is now known as justanotheruser
04:48 PM elmo40: anyone using lcnc with a plasma table?
04:50 PM Tom_itx: several
04:50 PM Tom_itx: pretty sure jt is
04:54 PM elmo40: i was wondering what code they use to run it
04:56 PM Tom_itx: i'm sure he'll be around sooner or later
04:56 PM elmo40: for example, we have a Tormach torch and it only reads G0,1,2,3
05:04 PM elmo40: when it 'sees' the G0 it automatically raises the head and moves over. Then it 'sees' the G1,2 or 3 and drops, ignite and moves in the path.
05:04 PM elmo40: no other G code needed
05:06 PM elmo40: the controller does all the macro stuff. kinda like a tool changer cycle has a bunch of other things (orient spindle, move to change position, bring out tool changer bar, unlock tool, blast air... blah blah...) all that is in a macro somewhere.
05:06 PM elmo40: is there this feature in lcnc?
05:08 PM Tom_itx: mesa has a torch height control board i'm pretty sure
05:08 PM Tom_itx: i don't know much about plasma though
05:10 PM elmo40: http://linuxcnc.org/docs/devel/html/plasma/plasma-cnc-primer.html
05:10 PM elmo40: much to read!!
05:15 PM jthornton: got about 4 boards out of that red oak log the rest is firewood
05:15 PM Tom_itx: nice
05:16 PM _unreal_: think you'll get red fire from it?
05:16 PM jthornton: the other 3 logs did much better, I think this was near the top
05:16 PM jthornton: amber flames of warmth
05:16 PM _unreal_: heh
05:22 PM elmo40: i was just reading the page on plasma. it mentions the uneven style that plate can be. i can attest to that!
05:23 PM elmo40: what about a height proxy probe as in 3D printing? maybe get a few points in a matrix and use that as the 'stock' dimension?
05:32 PM elmo40: i suppose the plate will buckle and peel when being cut... guess there are some things you can't prevent.
05:32 PM jthornton: thin edges will curl away from the cut but usually stay pretty flat
06:08 PM jthornton: elmo40, if your running LinuxCNC with a Mesa board and a Mesa THCAD card then you have torch height control... no clue about tormac
06:09 PM elmo40: tormac only has presets. no height control. simply edit the parameter to what you want and it uses those parameters during the cut.
06:10 PM elmo40: speed, lift-off, on-pause... stuff like that.
06:10 PM elmo40: the g-code sent to it is simply G0,1,2,3. nothing else. no M-codes or anything.
06:10 PM _unreal_: ve7it, I just mapped out all of the wires as far as I can tell sadly it doesnt help me to much on the working motor. because when i was scrapping it. I had to cut the connector off. do to lack of TIME at that time
06:10 PM _unreal_: :(
06:10 PM elmo40: the controller is assuming every G0 means lift-up.
06:11 PM _unreal_: but at least now I can start metering so I know what to look for
06:11 PM _unreal_: on the one thats open so I can mirror the outputs to the good motor
06:11 PM _unreal_: quote unquote :)
06:12 PM jthornton: elmo40, so what is the question about LinuxCNC?
06:13 PM elmo40: can i use these plain g-code files from tormach with lcnc. or do i need to add all the Z and torch M-codes?
06:14 PM jthornton: well G0 with no axis is an error
06:14 PM jthornton: if you have a torch control then yes you need to add the G code for it
06:14 PM elmo40: it gives position. but only X, Y
06:14 PM ve7it: should be interesting..... I havent played with brushless motors... will be interesting to see how long it takes to get the hall sensor phasing matching up wwith the motor winding phasing.. I think there are only 6 combinations to try!
06:14 PM jthornton: you could create a filter to add what you need perhaps
06:15 PM elmo40: run a python script to edit the code, i guess...
06:15 PM jthornton: why are you trying to run tormac g code?
06:16 PM elmo40: we have ~50 programs already.
06:16 PM jthornton: ah ok that makes sense
06:17 PM jthornton: yea a python program to "fix" them seems the way to go
06:18 PM _unreal_: ve7it, I believe its easy as well
06:18 PM _unreal_: soon as I get the wiring figure out
06:19 PM _unreal_: should be nothing more then powering the hall sensors. energizing A winding. and seeing which hall is triggered
06:19 PM _unreal_: then switch a wire note next hall sensor. and last one. then check ORDER and go from there
06:20 PM _unreal_: ve7it, you got all of the info about the encoder etc...?
06:20 PM _unreal_: HAY guys an opinion question for all of you. one sec while I dbl check my measurments.
06:20 PM ve7it: yes... started a directory of info
06:21 PM elmo40: jthornton, unless there are macros that will mimic what tormach does. ;-)
06:21 PM jthornton: macros?
06:21 PM _unreal_: IF you guys have a cnc machine traveling gantry
06:22 PM _unreal_: with a work bed area of aprox 18x32". How much Z would you guys think is reasonable?
06:22 PM jthornton: pass 1 fail 2
06:22 PM _unreal_: and we are talking 80/20 base extrusion, and re-enforced 20/20 extrusion
06:22 PM _unreal_: for X
06:22 PM _unreal_: how much Z do you guys think is reasonable?
06:23 PM jthornton: depends on the application... plasma, router, mill???
06:23 PM _unreal_: and again this is more or less what the machine looks like https://drive.google.com/open?id=1adQweaGjSkkFvFvusslkvgVxxnET7f9l
06:23 PM _unreal_: 4" Z 6" Z?
06:24 PM _unreal_: more?
06:24 PM jthornton: <jthornton> depends on the application... plasma, router, mill???
06:24 PM _unreal_: mill
06:24 PM _unreal_: <_unreal_> mill
06:24 PM andypugh: I heard a rumour that Tormach were going to make a Plasma. But there is no mention on their web page.
06:24 PM _unreal_: ;)
06:25 PM jthornton: well for a mill you want plenty of Z...
06:25 PM _unreal_: again using that image as a reference for idea's
06:25 PM jthornton: andypugh, I printed a couple of the THCAD mounts and they seem ok
06:25 PM _unreal_: the 20/20 extrusion is going to be re-enforced with angle and other tubing
06:26 PM andypugh: You probably want more daylight than travel too, bear in mind that toolholdrs have length. There is no point in being able to rub the drive dogs on the table.
06:26 PM _unreal_: so how much Z do you think would be reasonable?
06:26 PM andypugh: jthornton: Cool! I had no THCAD so didn’t bother.
06:26 PM _unreal_: ! and I'm using 15mm rails
06:26 PM jthornton: I have some on the shelf so I thought I'd see if they are ok, best to not print a brim lol
06:27 PM andypugh: _unreal_: No matter how much you have, it won’t be enough sometimes.
06:27 PM jthornton: aye
06:27 PM _unreal_: I know but I can always adjust more Z
06:27 PM _unreal_: I'm setting this machine up where it COULD be modified with little trouble
06:28 PM _unreal_: I'm thinking 6"
06:28 PM _unreal_: AT most
06:28 PM _unreal_: I'm using hgh15 I believe or something like that rails
06:28 PM jthornton: I like as much Z as Y
06:28 PM andypugh: My mill has 315mm
06:29 PM andypugh: But that isn’t made of 15mm rail.
06:29 PM _unreal_: right as I said I'm making this from 15mm
06:29 PM _unreal_: xZ will have quad blocks
06:29 PM _unreal_: same with Z will have quad blocks and Y has quad blocks
06:29 PM * jthornton wanders upstairs to put on his chef hat
06:29 PM _unreal_: everything has twin rails
06:30 PM andypugh: So, it will only ever be making small things.
06:30 PM _unreal_: rigth
06:30 PM _unreal_: I dont know how much load those blocks can/should take
06:30 PM andypugh: So what’s the biggest small thing you want to make :-)
06:31 PM _unreal_: I ordered the MGM15H https://www.aliexpress.com/item/33056324293.html?spm=a2g0s.9042311.0.0.4b644c4dPlcYze
06:31 PM andypugh: elmo40: When you say “Tormach” do you mean the Tormach who make LinuxCNC controlled milling machines and lathes?
06:32 PM ve7it: make big x axis side plates so the y axis can be mounted at 3 different heights... low for flat stock, medium for thicker stuff and a high seeting if you are doing something like engraving the top of a box or using a rotary axis on the table.. a bit of a pain to re-align it when changing heights, but adaptable to different jobs
06:37 PM _unreal_: ve7it, I have access to plenty of heavy duty materials. I'm just trying to figure out what the max reasonable load rating would be for the blocks I have
06:37 PM _unreal_: and as I said I'm mouting them in quad setup regardless
06:59 PM elmo40: _unreal_, how much Z is 'reasonable'? as much as you can handle! ;-)
07:00 PM elmo40: andypugh, ok, maybe it isnt tormach. i'll find out what it is called.
07:00 PM elmo40: torchmate?
07:00 PM _unreal_: elmo40, based on the rails I have
07:00 PM elmo40: i cant remember. i dont use it.
07:00 PM elmo40: the higher you go the wider the gantry needs to be to support it.
07:00 PM _unreal_: elmo40, I have MGN15H rails/blocks
07:01 PM elmo40: what is the ratio? up to you... how much flex are you comfortable with?
07:01 PM elmo40: 15s? tiny buggers... i'd go 12-14" of Z travel.
07:01 PM _unreal_: the axis isnt going to have much flex. I dont know what the blocks/rails can take for load?
07:02 PM _unreal_: thats twice to more then twice what I was looking at for Z
07:02 PM elmo40: 12 being the max, actually... with only Al extrusion
07:02 PM _unreal_: for a mill
07:02 PM elmo40: max out your build volume!
07:02 PM elmo40: don't limit yourseld
07:02 PM elmo40: f
07:02 PM _unreal_: elmo40, I'm using multi types of extrusion so the AXis isnt going to bend easy
07:02 PM elmo40: then 12" it is... ;-)
07:03 PM andypugh: Make the gantry tall enough for more than you tink you want, but designed so that you can drop it lower if it turns out to be a noodle.
07:03 PM _unreal_: 12 seems a bit high
07:03 PM _unreal_: though I do agree with the idea of more is better
07:04 PM elmo40: more IS better!
07:04 PM elmo40: i hate the Z limitations of machines
07:04 PM elmo40: the parts i want to do just dont fit...
07:05 PM _unreal_: heh
07:05 PM elmo40: add a vice and you lose a few inches. place on parallel bars or 123 blocks and you lose a few. now how long is the tooling, you lose a few there... by the time you are done with the tiny 6" travel you'd only have ~4" of usable Z!
07:05 PM _unreal_: 90% of what I do is on HDPE
07:05 PM _unreal_: and 1" at that
07:05 PM _unreal_: THOUGH....
07:06 PM _unreal_: a little altitude would encurage building a mini 5 axis
07:06 PM elmo40: at least a rotary 4th...
07:06 PM _unreal_: i'd LOVE to have an RC motor BLDC spindle setup[
07:06 PM _unreal_: very high power small package
07:06 PM _unreal_: and I have all kinds of those motors
07:07 PM _unreal_: but I dont own a lathe. no room...
07:07 PM _unreal_: on the other hand the marine compnay I work for higher a welder not to long ago and they are working on getting expensive welding equipment.
07:25 PM elmo40: https://gom.com
07:25 PM elmo40: some very cool hardware&software
07:25 PM elmo40: oh it would be nice to have money...
07:28 PM _unreal_: LOL elmo40 hehe my father has delt with that.
07:29 PM _unreal_: the company he works for does injection molding
07:29 PM _unreal_: i remember him taling about some new thing not to long ago
07:29 PM _unreal_: you just linked to IT
07:41 PM Rab: _unreal_, I have 4.5" of Z clearance and it's almost intolerable for some purposes. Putting a vise on the table eats up a lot of it: http://reboots.g-cipher.net/rabbot/image/boxclamp.jpg
07:43 PM _unreal_: intolerable?
07:44 PM _unreal_: oh as in not enough Z
07:44 PM _unreal_: interesting vice
07:44 PM Rab: 6" would be a lot nicer. But the Z-axis is the least rigid part of my machine, so a longer Z might have worsened that.
07:45 PM _unreal_: ya
07:45 PM _unreal_: you looked at my photo ya?
07:46 PM _unreal_: I'm more focused on the RAILS working limits
07:46 PM _unreal_: structure is an other matter.
07:46 PM _unreal_: MGN15H rail/blocks
07:47 PM Rab: It's a typical kind of tilting vise, like this: https://www.ebay.com/itm/392576022096
07:47 PM _unreal_: if I'm reading https://motioncontrolsystems.hiwin.com/Asset/MG-Series-Catalog.pdf right 57NM loading
07:47 PM Rab: Those cast aluminum boxes have a draft angle of a few degrees, so a tilting vise allows milling the side as a flat face.
07:47 PM _unreal_: AVERAGE
07:48 PM Rab: _unreal_, this? https://drive.google.com/file/d/1adQweaGjSkkFvFvusslkvgVxxnET7f9l/view
07:48 PM _unreal_: YES
07:48 PM Rab: Anyway if you're just routing sheet stock, you wouldn't need a lot of Z. But a vacuum table will eat up some, and other types of workholding will eat up more.
07:49 PM _unreal_: my extrusion will be loaded with angle aluminum and square tubing backing.
07:49 PM _unreal_: ya I've run in to HORRID issues with hold down HELL on my current machine. WORKS THE BOMB but 1.5" Z blows
07:50 PM _unreal_: I find it funny though how I got a lot of FLACK from people in this chan for getting the 200watt 48vdc micro spindle with no cooling nothing
07:50 PM _unreal_: yet its still going strong and has made me $10k from home this year
07:50 PM _unreal_: so far
07:51 PM _unreal_: and I only got this machine working over the summer THIS year
07:58 PM _unreal_: Rab, !!!!!!!!!!!!!! have you ever done anything with the starboard sample you got?
07:58 PM Rab: Maybe one nick's flak is another's helpful advice.
07:58 PM _unreal_: heh
07:59 PM Rab: _unreal_, no dood, I came very close to having a project but then I decided to use thinner polycarbonate sheet.
07:59 PM Rab: But I filed the original idea away for future reference.
08:00 PM _unreal_: what thickness sheet do you have?
08:00 PM Rab: 1/2"
08:00 PM _unreal_: and size?
08:00 PM _unreal_: ok
08:00 PM Rab: Like 6x12".
08:00 PM _unreal_: Rab, from half inch 2x2 vac area https://drive.google.com/open?id=1LFl4v5AcZk8ed-yGZLsisnEbMLLkKv7Q
08:00 PM _unreal_: https://drive.google.com/open?id=1QbNDFX0OICUy7FteExP7jd0FW6Z8xEst
08:01 PM _unreal_: the pump its self https://drive.google.com/open?id=1QlahYDQvvrCNHXYuz4LhCcG2CIWl1_2A $5 USD
08:01 PM Rab: I also got black for tacticool factor, but I find that most of the uses I have would be better suited for white. Like dust shoe, etc where I'd like to see if it's dirty.
08:02 PM _unreal_: dust shoe https://drive.google.com/open?id=1E1W32EQBBM5lk5nz-fXLBDNqrbNEdKy6
08:02 PM _unreal_: embeded magnets https://drive.google.com/open?id=1EHH847Q_LeMMIoDLrfZbtoUEihBaXSAa
08:02 PM _unreal_: working https://drive.google.com/open?id=1EfNv_J2UQjn2qWICo-6dBa0aEeP82RDu
08:02 PM * _unreal_ waits for the HOW THE Fuck
08:02 PM _unreal_: HEHE
08:02 PM Rab: _unreal_, very nice. Vacuum table is definitely a good application.
08:03 PM _unreal_: with magnets located https://drive.google.com/open?id=1E5-rpmLg5HROr4s4sXaLNg5hOAigbYnE
08:03 PM _unreal_: you like :)
08:04 PM _unreal_: that little thing is MORE then strong enough to hold a PCB
08:04 PM _unreal_: so long as I dont drill a hold
08:04 PM _unreal_: hole
08:04 PM _unreal_: RAB if you make a VAC table I'd suggest rather then doing a RING like I did
08:05 PM _unreal_: with the gasket
08:05 PM elmo40: we used vacuum for milling thin aluminum components
08:05 PM _unreal_: make the entire SURFACE a gasket with micro holes
08:05 PM _unreal_: and a big sheet of gasket material
08:05 PM _unreal_: I dont have any photos of it but I tried that idea and it worked much better
08:06 PM _unreal_: and if some holes are exposed a piece of paper works great
08:06 PM Rab: _unreal_, yeah, I've seen that done. But it makes milling through difficult, unless you have a custom fixture for the workpiece.
08:07 PM elmo40: what we did was a grid like a chess board on a ~1" thick piece of Al. the lines were grooved to accomodate a 1/4" foam sealing strip. there was one hole in the centre of the plate and you made up the groove to match your part.
08:07 PM Rab: elmo40, that would be my application: milling and engraving aluminum and titanium faceplates.
08:08 PM Rab: elmo40, I've seen that setup too. There are aluminum vac tables on eBay set up for that IIRC.
08:09 PM elmo40: if there were holes to be drilled they were done first while clamped. then use the holes as hold-down points with a socket head bolt and an o-ring under it to keep the vacuum sealed all around it.
08:12 PM _unreal_: hum
08:13 PM _unreal_: Rab, an other nice setup for PCB is the floating setup
08:13 PM _unreal_: but again kind of needs to be rather "custom" sized
08:14 PM _unreal_: elmo40, the only EASY and smi univesal method for doing holes is an EDGE holder
08:16 PM _unreal_: I've thought about making a pneumatic setup before. but is just so much design work for something that has to suck down then retain/LIFT to give workspace or removed the vac plate and then sense offset before drilling holes
08:17 PM _unreal_: an other option would be to make a MULTI motion plate
08:17 PM _unreal_: where the EDGE is the TIE down. and the entire plate suface is a series of micro actuators
08:18 PM _unreal_: that can raiselower
08:18 PM _unreal_: regardless nothing beats WOOD/DBL sided tape
08:18 PM _unreal_: :)
10:36 PM elmo40: fixtures is what i design
10:36 PM elmo40: give me a drawing and the stock material and i'll make the most efficient way to hold and process the part.
10:36 PM elmo40: been doing that for companies for almost 15 years now.
10:38 PM elmo40: from cnc machining to robotic welding.
10:39 PM elmo40: now... if i can only get this damn 3D printer to stop skipping! LoL.
10:41 PM elmo40: only happens on 9+hr long prints. i think the driver is getting too hot, even though there is a 90mm fan blowing on them with cooling fins and riser pins to allow cooling fins underneath. Such malarkey!
11:03 PM _unreal_: what do you mean skipping?
11:03 PM _unreal_: loosing steps?