#linuxcnc Logs

Jul 17 2017

#linuxcnc Calendar

12:09 AM MrTrick: anyone use an edge finder? What kind and how do you like it?
12:26 AM LeelooMinai: MrTrick: I used few times the common mechanical one - with the cylinder that aligns/disaligns.
12:26 AM LeelooMinai: Better than nothing, but most I got out of it was "I really need to build that touch probe ASAP" :)
12:28 AM LeelooMinai: Ideally something even better than touch probe - something that would not require tool change, but did not yet think about it.
12:36 AM XXCoder: tiwake: theres more problems besides that. single launch'd cause serious problems with envorment around it
12:36 AM pink_vampire: hiii
12:37 AM XXCoder: hey
12:38 AM pink_vampire: I need to organize my table :-)
12:38 AM pink_vampire: XXCoder:
12:39 AM XXCoder: I need to reorganize... everything
12:39 AM pink_vampire: do you want to organize together?
12:40 AM XXCoder: lol nah you dont want my help, im really bad on organzing lol
12:41 AM pink_vampire: sometime if I need some "mental support" I call to my bff and we organize he whole house and talk on the phone at the same time
12:42 AM XXCoder: nice! wish its possible for me sometimes :)
12:42 AM XXCoder: way to chat while busy clean crap up
12:42 AM * LeelooMinai ponders "Wait, they are playing Sims online or what...."
12:43 AM pink_vampire: we some time text
12:45 AM XXCoder: cool :)
01:04 AM XXCoder: wow glad the artist did bold strokes most times
01:04 AM XXCoder: those are fine, some fade outs leaves a mess for me to fix when making it into a vector.
02:06 AM Valen_ is now known as Valen
02:20 AM pink_vampire: XXCoder: done!
02:20 AM XXCoder: nice and organized he
02:20 AM XXCoder: *eh
02:26 AM XXCoder: done cleaning up drawing of my bro
02:26 AM XXCoder: his santa-like beard drawing is hard to clean.
02:27 AM pink_vampire: cool!!!
02:28 AM XXCoder: in real life hes quite less than santa-like lol
02:28 AM XXCoder: caricature drawing is interesting
02:30 AM Deejay: moin
02:33 AM pink_vampire: I have 325g of aluminum chips in my new bottle!!
02:33 AM XXCoder: plan to melt em and cast or?
02:36 AM pink_vampire: and 763g on the other bottle
02:36 AM pink_vampire: more then 1kg of chips!
02:38 AM pink_vampire: XXCoder:
02:38 AM XXCoder: nice
02:39 AM pink_vampire: how much do you think I can get for that?
02:39 AM Crom: Went and saw our production of 'Midsummer's nights dream" tonight... Could not stop laughing.
02:40 AM XXCoder: good question actually
02:40 AM archivist: clean aluminium was £.50 a kilo scrap
02:40 AM XXCoder: I never looked at chips alum price
02:42 AM archivist: so that lot not even a dollar
02:44 AM XXCoder: checked one site, its little over a dollar so yeah dont expect much apparently.
02:45 AM Crom: Clean AL extruded $0.40-$0.50 pound
02:45 AM Crom: That's Los Angeles
02:52 AM LeelooMinai: Hmm, insteresting... http://www.bbc.com/news/world-us-canada-40461666
06:08 AM jthornton: https://www.youtube.com/watch?v=f1E9jtE1aAk
06:41 AM jthornton: https://www.youtube.com/watch?v=S_Thvbp0rPo
06:50 AM pink_vampire: jthornton: https://www.youtube.com/watch?v=FbzxvWkbZ3M
06:51 AM XXCoder: now thats crazy pink_vampire lol
06:51 AM pink_vampire: all of them are cool
06:52 AM XXCoder: lego plotter saw that
06:55 AM jthornton: lol at the hover chair
06:55 AM XXCoder: wow now thats OLD. the lego machine that automates row of tiles
06:56 AM XXCoder: now its back to ballon thing
06:57 AM jthornton: https://www.youtube.com/watch?v=kgakfi8Ibjc
06:57 AM XXCoder: battery glued in lol
06:59 AM XXCoder: pink_vampire: one of sections shows frame familiar to what you made
06:59 AM XXCoder: its vacuum forming
07:01 AM pink_vampire: jthornton: what is that cuteeeeee furnace
07:02 AM XXCoder: he made it
07:02 AM XXCoder: in fact theres video series of him making it.
07:05 AM XXCoder: https://www.youtube.com/watch?v=-WFyrN1MHmk keep watching
07:08 AM Frank_10: hi guys; quicknquestion ; in your experience; are shielded limit switch wires a must? with a 24vac logic
07:09 AM archivist: can be if in an electrically noisy environment
07:10 AM jthornton: I've never used shielded wire for limit switches and having said that they don't run parallel to high voltage either
07:11 AM Frank_10: i see.. i have all my other cables shielded
07:11 AM Frank_10: jthornton: how far apart are the limit wires
07:12 AM jthornton: far apart from?
07:12 AM Frank_10: the high voltage cables
07:14 AM jthornton: not in the same conduit and not next to each other in a cable bundle
07:15 AM Frank_10: ok thanks!
07:15 AM XXCoder: jthornton: does amps matter? because my entire system is 24v and spindle is 400w
07:16 AM archivist: if the conduit is steel it is shielded :)
07:26 AM jthornton: XXCoder: good wiring practice is to not have motor wires parallel to signal wires
07:27 AM XXCoder: signal wires as in limit switches so on?
07:27 AM jthornton: aye
07:27 AM XXCoder: ok
07:34 AM GBeard: hellow once again good people
07:37 AM GBeard: anyone have any experience with makercam?
07:38 AM GBeard: my machine is cutting and working well (thanks for the help btw) but everytime i use maker cam and open the resulting files in linuxcnc it just appears blank
07:43 AM jthornton: open the file with a text editor and see what's inside
08:25 AM Frank_10: wondering: im having my limit switches connected so that they kill power through a contactor when they open; is a contactor coil prone to tripping because of noise in the line? or its harder than a bob
08:26 AM Frank_10: meaning more noise inmune
08:26 AM gonzo_: you are unlikely to have noise so strong that it will trip a contactor
08:26 AM gonzo_: that would take real supplky instability
08:27 AM archivist: is this via linuxcnc or what
08:27 AM Frank_10: i coukdnt find much on googke; which lead me.to believe the same thing
08:27 AM Frank_10: nope, straight to contactor coil
08:27 AM Frank_10: 24vac transformer
08:27 AM Frank_10: on limits
08:28 AM Frank_10: so the 150kg gantry doesnt fall lol
08:28 AM Frank_10: the home switches are going to be the problem then
08:28 AM gonzo_: limits going to the PC also?
08:28 AM Frank_10: they are wired in series right?
08:28 AM Frank_10: nope;
08:29 AM Frank_10: im thinking of having a relay telling the pc of the limit trip
08:29 AM gonzo_: that would give you some useful isolation
08:29 AM Frank_10: the relay you say?
08:30 AM gonzo_: the trick to avoiding noise issues is, be careful of how you ground things and getting the switched currents up. So switching something like an optocoupler/relay etc, rather than trying to control a ttl port dircetly
08:30 AM gonzo_: yes the relay
08:32 AM Frank_10: i see
08:33 AM Frank_10: wonder if i can use one relay to tell the machine about a limit trip; and a home trip; i think i read somewhere that its possible
08:33 AM gonzo_: and both of the above give you some degreee of ground isolation too
08:33 AM Frank_10: that way no switch is wired directly to the mesa card
08:34 AM gonzo_: I use the optocoupled inputs and outputs on one of the i/f cards. (7i74 or 7i37)
08:35 AM gonzo_: my rule, everything going out of the control box with be isolated, even the pendant
08:36 AM Frank_10: my 7i76 only has spindle optocpupled outputss
08:40 AM gonzo_: yep, I just couldn't remember what board has what
08:41 AM gonzo_: if the 76 is the one with rs422, I mainly use them as single ended drivers (that you can invert in wiring) to drive internal things like the optocoupled stepper inputs
08:42 AM gonzo_: the analogue potentiometer output looks nice. I'm in the process of using that to drive my vd
08:42 AM gonzo_: fd
08:42 AM gonzo_: vfd
08:46 AM Frank_10: im onto that too
08:47 AM archivist: do you have separate homing switches
08:49 AM Frank_10: yep
08:50 AM Frank_10: the limit ones will cut power and through a contactor they will tell the board that it stopped; like a normal limit i guess
08:51 AM Frank_10: as of right now lol
08:51 AM gonzo_: having a separate smaller relay for connecting to the mesa would be better than trying to use the same contactor that switches the main power
08:52 AM Frank_10: yes another small one
08:52 AM Frank_10: not the 18amp 3phase one
08:52 AM gonzo_: keeping ttl as far away from power as possible
08:52 AM Frank_10: main power~
08:53 AM Frank_10: im thinkjng of using that relay for 3 things: limits home and servo alarm output
08:53 AM Frank_10: making it a limit trip
08:53 AM Frank_10: do i sound crazy?
08:55 AM gonzo_: if you cut the power with the limit, would that not be a problem for homing?
08:59 AM Frank_10: nope; homing has a different switch;
08:59 AM Frank_10: both connext to the pc relay; only one to the mains contactor
08:59 AM Frank_10: that killsnmotors and vfd
08:59 AM Frank_10: i might be wrong thou
10:09 AM Frank___: anyone uses cat5e shielded cable for limits/home??????
10:10 AM archivist: I bet some do BUT it is not flexible usually
10:11 AM Frank___: yep thats my concern
10:11 AM Frank___: i cant find a good bipolar shielded cable around my area
10:11 AM Loetmichel: depends
10:11 AM Frank___: i've thought of audio balanced cables
10:12 AM Loetmichel: there is cat5e with stranded wires
10:12 AM Frank___: with copper shield, but they must be stiff too
10:12 AM Loetmichel: and there is cat5e with solid wires
10:12 AM Frank___: yep, imported
10:12 AM Loetmichel: latter will break fast
10:12 AM Frank___: i've asked and its twice the price
10:12 AM Frank___: is it worth it?
10:13 AM Loetmichel: real copper braid shielding isnt that stiff at all
10:13 AM Loetmichel: the usual foil shield is however
10:14 AM Frank___: the audio balanced cable costs half of the stranded wire cat5e
10:14 AM Frank___: life and death decisions...
10:14 AM Frank___: lol
10:14 AM archivist: if you intend flexing any cable make sure the bend radius is large
10:15 AM Frank___: yes im trying to do that, extra long cablechain
10:15 AM Frank___: crap cant decide
10:16 AM Loetmichel: i normally use thin 3mm 4 strand audio cable
10:16 AM archivist: we were using standard flat 50 thou spacing stranded ide cable, it lasted about half an hour
10:16 AM Loetmichel: with an UNBRAIDED just twisted copper strand shield
10:17 AM Loetmichel: thats pretty much as flexible as it gets AND cheap
10:20 AM Frank___: 4 strand meaning 4 wires in each conductor? or 4 filaments per wire
10:27 AM SpeedEvil: 4 conductor
10:31 AM sync: flat flex is good for flexy things
10:31 AM sync: although the manufacturer must be reasonably good to get the copper down correctly
10:32 AM archivist: we used the stuff made by Gore, it never broke
10:32 AM Loetmichel: i meant 4 wire cable stranded
10:32 AM Loetmichel: sorry
10:32 AM Loetmichel: yes, 4 conductor
10:33 AM Loetmichel: sync: do you mean FFC?
10:33 AM Loetmichel: those are not shielded, and if they are they are no longer flexible
10:33 AM sync: untrue
10:33 AM sync: you can get them multilayered and they still stay flexible
10:33 AM Loetmichel: i am fighting with that at the moment
10:35 AM Loetmichel: signals are to weak to shield them directly with copper tape... so i have to put 1mm thick double sided tape on both side and THEN the copper tape around.
10:35 AM Loetmichel: and i HATE those 0.5mm pitch connectors... :-(
10:44 AM boddenkreuzer: Hi all! I have a Kress router connected to a relay on a known pin. Would it be possible to get the relay on/off connected to M4/M5?
10:48 AM archivist: edit your hal file
10:51 AM boddenkreuzer: at the moment I have the relay on #setp hm2_5i25.0.gpio.029.is_output true and #net spindel hm2_5i25.0.gpio.029.out
11:08 AM Frank___: loetmichel: you buy that cable and shield it yourself with copper? or it comes like the way you described it
11:20 AM Loetmichel: Frank_: i am at the moment in the process of shielding an HP M402 laserprinter... inside there is a ton of these FFC
11:21 AM Loetmichel: but the cable i meant was simple audio cable. When i get back to the company tomorrow i can look for our supplier for the 4 awg22 stranded conductor copper strand (no braid) shielded cable.
11:21 AM Loetmichel: i am in germany though, so it may not be readily aviable to someone overseas
11:22 AM Frank___: i ended up ordering some balanced audio cable with copper shield, but im worring about the size, the one i ordered (cheapest) is really small conductor
11:22 AM Loetmichel: you could also order a bit of Belden audio multicore and pull out the single mic lines from them, they do great as end stop wiring
11:26 AM Frank___: but you think its going to be a problem the small size conductor? it must be something like 24 awg, and i only need to move 15w at 24v
11:26 AM Loetmichel: the thing is that foil shield is bad. braided is better but just twisted copper strands as shield is tops for repeated movement and less fatigue.
11:26 AM Loetmichel: its usually 22 or 24 awg
11:27 AM Loetmichel: and thats no problem
11:27 AM Loetmichel: the usual end stop switch runs only with 12 to 24V and less than 100mA, so no problems there
11:27 AM Frank___: yea i ordered that, idk if its properly braided but whatever
11:27 AM Frank___: its a microswitch
11:28 AM Loetmichel: let me see...
11:28 AM Frank___: and switches on off the neutral conductor of a contactor coil
11:28 AM Frank___: idk
11:28 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=12539&g2_imageViewsIndex=1 <- there you can see the gray inner mic line of a belden multicore to the micro switch on my home CNC
11:29 AM Frank___: i just want to see the machine moving, then ill probably sort out problems later :D
11:29 AM Frank___: yes i see it
11:29 AM * roycroft gives frank___'s machine a good shove
11:30 AM Frank___: insteresting coupler you ahve there
11:30 AM roycroft: there! it moved!
11:30 AM Frank___: lol
11:30 AM roycroft: it's alive!
11:31 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=14091&g2_imageViewsIndex=1 <- thats the cable i normally use for end switches. (ignore the USB plugs) ;)
11:31 AM Loetmichel: the coupler is self-milled/rurned from a block of nylon ;)
11:32 AM Loetmichel: turned
11:34 AM Loetmichel: didnt live THAT long though: http://www.cyrom.org/palbum/main.php?g2_itemId=12563&g2_imageViewsIndex=1
11:35 AM Frank___: crap lol
11:35 AM Frank___: have you seen the flex coupler made of plastic tubing on the cnczone?
11:35 AM Frank___: actually i dont remember where i saw them
11:36 AM Loetmichel: i know the kind out of water /fish tank tube
11:36 AM Loetmichel: not that great to be honest
11:36 AM Frank___: i see,
11:36 AM Loetmichel: i recently replaced the couplers at the companys CNC 6040
11:36 AM Loetmichel: because: http://www.cyrom.org/palbum/main.php?g2_itemId=14193
11:37 AM Frank___: and what the hell is that motor on the Z with water refrigeration
11:37 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=15011 <- had to turn down the bew ones a bit to fit into the motor mounts though
11:37 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=15014&g2_imageViewsIndex=1
11:37 AM Frank___: im using that spyder type on my machine
11:38 AM Frank___: no keyshaft works good?
11:39 AM Loetmichel: yes
11:39 AM Loetmichel: just put enough torque on the worm screws ;)
11:39 AM Loetmichel: ( and not as much as on the plastic one at home ;)
11:41 AM Loetmichel: btw: i like the combination of VNC and VLC on the linuxCNC PC... MUCH quieter without any loss in overview ;) -> http://www.cyrom.org/palbum/main.php?g2_itemId=15256&g2_imageViewsIndex=1
11:43 AM Frank___: well now i have to google those abreviations lol
11:43 AM Frank___: ill upload a photo of my machine
11:45 AM Loetmichel: "Virtual Network Computing"-> remote desktop, VLC is a video player/encoder
11:46 AM Loetmichel: the combaination of the two + an endoscope usb cam makes it possible to work remotely on the CNC mill without the sound from the office ;)
11:46 AM Loetmichel: https://www.youtube.com/watch?v=9u_ChO1AKYY <- see?
11:49 AM Frank___: lol
11:49 AM Frank___: i definetively will check that stuff for my next small cnc build
11:52 AM Frank___: https://ar.pinterest.com/pin/401664860507785445/
11:53 AM Frank___: hopefully this week its finished after 2 years of work on that bitch
12:00 PM IchGucksLive: hi from Germany
12:02 PM IchGucksLive: Frank_ how litle will the next one be
12:02 PM Deejay: krauts overtake
12:03 PM IchGucksLive: with bratwurs
12:03 PM IchGucksLive: t
12:03 PM Deejay: hehe
12:03 PM Deejay: and sauerkraut
12:03 PM IchGucksLive: homemade mustard
12:04 PM Loetmichel: FRIKADELLEN!!!
12:04 PM Deejay: :)
12:05 PM Frank___: Ichguckslive probably something to leave working alone cheap and about 1x1meter
12:06 PM IchGucksLive: 1x1 is quit good
12:09 PM IchGucksLive: Frank___: das ist die holzfräse https://www.youtube.com/watch?v=u5v74lU3KUI
12:09 PM IchGucksLive: 100x80cm Z 350
12:10 PM IchGucksLive: kosten standard 700
12:10 PM IchGucksLive: mit Hiwin kugelumlauf und closed loop ca 1600
12:10 PM IchGucksLive: dan sind aber 12M drin
12:11 PM IchGucksLive: 12m/min wenn du eine 5i25 nimmst
12:11 PM IchGucksLive: Frank___: you are german or
12:11 PM Frank___: nice idea
12:11 PM Frank___: maybe something with double support?
12:11 PM Frank___: i speak english!
12:11 PM IchGucksLive: yes
12:11 PM Frank___: and spanish
12:11 PM Frank___: for the 4th axis i mean
12:11 PM IchGucksLive: jesosalos is in spain
12:12 PM Frank___: its your machine?
12:12 PM IchGucksLive: yes i build for education schools
12:13 PM IchGucksLive: Frank___: you shoudt start on that railsystem http://www.ebay.de/itm/EU-6Pcs-Square-Linear-Rail-Guide-L-400-700-1000mm-Ballscrew-1605-400-700-1000mm-/162585641166
12:14 PM IchGucksLive: Frank___: here are the closed loop steppers 8Nm http://www.ebay.de/itm/DE-STOCK-3-Set-8N-m-Closed-Loop-Servo-Motor-Nema34-116mm-6A-HSS86-Hybrid-Driver-/162577099515
12:19 PM IchGucksLive: Loetmichel: is there a bus inverter wit non AND gate as the 540
12:31 PM IchGucksLive: Frank___: still on
12:32 PM IchGucksLive: Frank___: you also can combine a cheep SBR12 fpor better stability to the frame on the side
12:33 PM IchGucksLive: or id you like it the cheep hard way a simple 20mm HardenSteel pin
12:34 PM Frank___: im still finishing my first machine! only need to wire stuff up, so the second one will come probably in about half a year...
12:34 PM Frank___: it took me 2 years to build this one! didnt knew what i was getting my self into
12:34 PM Frank___: https://ar.pinterest.com/pin/401664860507785445/
12:35 PM LeelooMinai: Frank___: Looks nice - like the welded steel frame.
12:37 PM LeelooMinai: Though annoying pintrest wants the login to view more stuff: lame:)
12:38 PM IchGucksLive: Frank___: cabinet -> http://heimwerkermarkt-tretter.de/ef_el.jpg
12:40 PM Frank___: lol
12:40 PM Frank___: sry
12:40 PM Frank___: didnt knew,
12:40 PM Frank___: idk another uploading webpage
12:40 PM Frank___: and i use it to take product ideas :D
12:41 PM LeelooMinai: IchGucksLive: Similar to mine, but mine is a bit smaller. But I also did the same thing, that is put an alu plate for mounting: https://www.flickr.com/photos/100017731@N03/15967931302/in/dateposted-public/
12:41 PM Frank___: looks super clean ichguckslive
12:41 PM IchGucksLive: Frank___: only 3 axis http://heimwerkermarkt-tretter.de/3achs_elek
12:42 PM LeelooMinai: IchGucksLive: That's a plycarbonate industrial box, isn't it? :)
12:42 PM LeelooMinai: poly*
12:42 PM IchGucksLive: yes
12:42 PM phipli: evening
12:43 PM LeelooMinai: Right, mine too, but I only got it because someoen was selling it cheap. They are rather expensive.
12:45 PM LeelooMinai: Hmm, the plastic cable channel thingies are nice. I put the cables under the plate, but this is simplier.
12:47 PM Frank___: my cabinet is like 1x1m lol
12:47 PM Frank___: lots of space i dont use thou
12:48 PM Frank___: is it usual to servomotors to stiffen up the rotor a little when plugged to the driveR? even thou there is absolutely no power
12:48 PM Frank___: its happening to mine, its super weird
12:49 PM djdelorie: Frank___: if you short the three motor wires, it stiffens up a lot :-)
12:58 PM Frank___: well i didnt, idk what the hell lol
12:59 PM pcw_mesa: Frank___: yes because you are charging the HV BUS capacitor through the freewheeling diodes
12:59 PM LeelooMinai: Frank___: Happened only once? Maybe sime caps?
12:59 PM LeelooMinai: some*
01:00 PM LeelooMinai: Right, if in doubts, in electronics, always blame caps:)
01:00 PM Frank___: nope, i mean right now they are connected and it takes more force to move the pulley compared to when they are not plugged
01:00 PM Frank___: everyone of them
01:01 PM Frank___: pcw_mesa: good to hear its no harm thanks!
01:02 PM pcw_mesa: there is normally a bleeder on the HV bus so you would expect a noticeable load every time you rotate fast enough
01:02 PM Frank___: i thought it was just me because i couldnt find much on the google
01:03 PM pcw_mesa: if you have access to the HV bus (some drives bring this out) you can measure the voltage
01:03 PM Frank___: every 1/8 rotation you can feel that the stiffens varies a bit
01:03 PM Frank___: stiffness*
01:04 PM pcw_mesa: peaks of the (three phase) generated sine wave voltage
01:05 PM Frank___: no wonder you make electronics lol
01:06 PM pcw_mesa: you are basically running a permanent magnet 3 phase generator into a 3 phase rectifier bridge with a (large) capacitive load
01:06 PM Frank___: i dont think i've come accross the term hv bus on the manuals, is it the regenerative resistor?
01:08 PM pcw_mesa: the regenerative resistor is connected to the bus voltage only when the bus voltage exceeds a preset threshold
01:08 PM Frank___: bottom line: to make it clear for me :D is it normal? hehe first time ever connecting servomotors and stuff
01:08 PM pcw_mesa: (and you are not going to get to the threshold twiddling the shaft by hand)
01:09 PM pcw_mesa: yep absolutely normal
01:09 PM Frank___: yep the manual says when over regeneration alarm pops up connect an external regenerative resistor
01:10 PM Frank___: now im figuring out how to set up home and limits on the 7i76
01:10 PM Frank___: and the vfd to the 7i76
01:11 PM CaptHindsight: skunkworks: http://www.cnn.com/2017/07/16/us/possible-northern-lights-show/index.html would have been nice to hear this news yesterday
01:12 PM skunkworks: I forgot about it...
01:19 PM IchGucksLive: CaptHindsight: if you can get the view take your chance
01:20 PM CaptHindsight: already over
01:20 PM IchGucksLive: there is more to come
01:21 PM CaptHindsight: looks like it was seen best somewhere over ohshititskold siberia
01:21 PM IchGucksLive: CaptHindsight: http://www.aurora-service.eu/aurora-forecast/
01:41 PM IchGucksLive: im off Gn8 from Germany
02:05 PM miss0r2: Progress continues on building the projektor lift for my friend: http://picpaste.com/IMG_20170717_202750-Y2mUL5Jw.jpg
02:05 PM miss0r2: , should anyone be interrested
02:06 PM SpeedEvil: https://i.ytimg.com/vi/FSrcMaid0mg/hqdefault.jpg picture unrelated alas
02:07 PM miss0r2: ^ How he described his need
02:08 PM LeelooMinai: miss0r2: What's with the webbing - is this some weight saving features?
02:08 PM miss0r2: LeelooMinai: Exactly
02:08 PM miss0r2: Also, it makes it look cooler :D
02:08 PM SpeedEvil: plywood
02:08 PM LeelooMinai: Well, kind of weird though - lots of waste there:)
02:08 PM LeelooMinai: I mean you have to buy much more material for it.
02:09 PM miss0r2: weight-reduction + coolness factor > waste
02:09 PM LeelooMinai: Right, well, the front part - that's a huge plate of alu almost...
02:09 PM miss0r2: LeelooMinai: yeah, that is somewhat true. I would buy the same amount of material, unless I were to build it from more than one part each
02:10 PM LeelooMinai: Wait... don't tell me both front back and the bed were CNC from one huge block of alu... :)
02:11 PM miss0r2: no :)
02:11 PM LeelooMinai: I got a bit worried for a second:)
02:11 PM miss0r2: but each 'component' would have to be build from more smaller pieces, unless I would do it from a large place
02:12 PM miss0r2: Also, My friend brought the material himself, so I'm not spending money on this crazy project
02:12 PM SpeedEvil: Also, what is a projector lift
02:12 PM LeelooMinai: Well, the bed, ok, I can see it, but the sides are a bit extreme imo.
02:12 PM SpeedEvil: do you mean a video projector?
02:12 PM miss0r2: yeah
02:12 PM miss0r2: This will retract it up into the attic, when it is not in use
02:12 PM miss0r2: size comparison: The linear rails are 20mm
02:13 PM miss0r2: in diameter
02:14 PM miss0r2: Overbuilt, overly complicated, waaay overkill... check, check & check - what could possibly go wrong :]
02:14 PM SpeedEvil: It falling and killing someone through lack of mountings.
02:16 PM miss0r2: I don't realy see that happending. :] I did some calculations(quite basic ones). This should be able to lift 75KG and hold 200KG without failing critically
02:16 PM miss0r2: assuming the 200 or 75 KGs are placed close to the vertical axis of the mounts that is :]
02:17 PM miss0r2: Atleast more than enough for a 2.3kg LED projector
02:17 PM CaptHindsight: define: overbuilt and over-engineered
02:17 PM LeelooMinai: CaptHindsight: Define the opposite:p
02:18 PM miss0r2: CaptHindsight Quite the opposite
02:18 PM CaptHindsight: I often hear the terms from hobbyists/makers
02:19 PM LeelooMinai: CaptHindsight: Let me guess - and you work at NASA and it is not overbuilt for space applications:)
02:19 PM CaptHindsight: and from possible engineers from China and India
02:19 PM CaptHindsight: not trained in the west
02:19 PM miss0r2: overbuild= Don't want to think too much about it, so i'll make everything so thick it can survive a thermal nuclear attack. overingeneered = So much calculation has went into it, the design starts to be just stupid
02:20 PM LeelooMinai: Yes, it's a good strategy for hobbyists actually - since you don't have to produce zillion copies of the design, paradoxically you can afford to use overkilled parts/methods
02:21 PM miss0r2: yeah. In Denmark we have a term for this. It roughly translated to 'using both belt and suspenders'
02:21 PM LeelooMinai: I had this approach to microcontrollers for a long time for example. Was often arguing with hobbists that would say that they are poor and that's why they use 80but PICs instead of ARMs etc.
02:21 PM miss0r2: as a clothing refrence
02:21 PM LeelooMinai: 8-bit*
02:22 PM LeelooMinai: And I was arguing that the exact opposite makes more sense - use nice ARM so you don't have to switch tools if your next project needs something more powerful.
02:22 PM miss0r2: Speaking of electronics: I was thinking about getting a small tube amp, to use for two small studio speakers for my pc... Any recomendations?
02:23 PM CaptHindsight: something designed to last for longer than the warranty?
02:23 PM miss0r2: because I can... :]
02:23 PM miss0r2: no... i'm poor
02:23 PM LeelooMinai: miss0r2: Tube amp? Imo that is silly - what are you going to play guitar or use them as speakers for PC:)
02:23 PM miss0r2: preferablt not one with blue LEDs under the tubes
02:24 PM miss0r2: hehehe.. I just like the look of it
02:24 PM miss0r2: Makes me feel all warm and fussy inside :]
02:24 PM LeelooMinai: Also, studio speakers are for, well, recording, etc. - not really for listening to stuff daily...
02:25 PM CaptHindsight: overbuilt? http://www.practicalmachinist.com/vb/attachments/f12/15078d1251542684-wanted-bridgeport-milling-machine-mint-shop-006.jpg
02:25 PM miss0r2: says you. i'm somewhat of a PA freak. I've been doing stage setups for a decade
02:25 PM miss0r2: CaptHindsight: One could argue that, yes
02:25 PM CaptHindsight: overbuilt? https://s-media-cache-ak0.pinimg.com/originals/39/55/45/395545f6b1c58887e0e78123f74c9043.jpg
02:26 PM LeelooMinai: CaptHindsight: Well, don't be so happy about that bridgeport. I heared someone here saying that "they are not stiff enough" :)
02:26 PM SpeedEvil: Add viagra to the coolant
02:26 PM miss0r2: lol
02:26 PM LeelooMinai: miss0r2: Well, doesn't mean that you are not a bit "nuts" about the equipment:)
02:27 PM LeelooMinai: miss0r2: You are almost a step from oxygen-free copper cables there:p
02:28 PM miss0r2: LeelooMinai: You are right. I have been called crazy by alot of people, when I do setups. I have this fear within me, from the first time I went out and played as a DJ on my own speakers - I didn't have enough amperage. I guess from that day forward I just decided, I would rather have twice the equipment needed, than be in a situation where I lack soundpressure... (overbuild)
02:28 PM * LeelooMinai imagines miss0r2 hiding those cables under the seat and looking around.
02:29 PM roycroft: my main home stereo has plenty of power, although some of my not-so knowledgeable friends disagree
02:29 PM miss0r2: LeelooMinai: hehe not realy lol. I would never argue about 'real analog sound', at the very least not while feeding the tube amp a signal from a switchmode powered stack of transistors, translating a string of ones and zeroes to audio
02:30 PM LeelooMinai: miss0r2: Hope no one sues you for exploded ear-drums:p
02:30 PM roycroft: it's about the quality of the power, not just the quantity of power
02:30 PM CaptHindsight: overbuilt? https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Tour_Eiffel_Wikimedia_Commons_%28cropped%29.jpg/240px-Tour_Eiffel_Wikimedia_Commons_%28cropped%29.jpg
02:31 PM miss0r2: roycroft: My first set of rhino style speakers (two 15" and one horn in each box), played so perfectly clear, that while testing it, a friend and me was standing in front and thinking 'thats not wery loud', I turned to speak my mind to my friend, realizing only warm air escaped my mount - I could not even hear myself..
02:32 PM LeelooMinai: Overbuilt? http://2.bp.blogspot.com/-uAC3Wh6xT-Q/T4C3UfVUUAI/AAAAAAAAAE4/59j3ddacjh8/s1600/insideview.JPG
02:32 PM roycroft: capthindsight: that thing hasn't fallen down yet, and it's 130 years old
02:32 PM miss0r2: LeelooMinai: A strange case of underbuild and underingeneered
02:32 PM roycroft: i have a mcintosh mc2100 at home as the power amp for my main stereo
02:32 PM LeelooMinai: miss0r2: Makes me lol, but I bet it kind of worked:)
02:33 PM roycroft: 105w/channel of clear, beautiful sound
02:33 PM miss0r2: Bleh... I have to run. Family duty, see you around
02:33 PM CaptHindsight: overbuilt or overhyped? http://reprap.org/mediawiki/images/thumb/9/95/Pc-va.jpg/600px-Pc-va.jpg
02:33 PM roycroft: overrated, capthindsight
02:35 PM CaptHindsight: seems to come from those who don't know their rectum from a hole in the ground
02:35 PM LeelooMinai: CaptHindsight: Don't be such an elitist - what are you from USA or something:)
02:36 PM roycroft: fuck off
02:36 PM LeelooMinai: lol
02:38 PM pink_vampire: LeelooMinai: are you trying to make a probe?
02:38 PM LeelooMinai: 90% of people who like to point out how expensive stuff they use, etc. on IRC turn out to be from USA - I am just working with statistics here:)
02:39 PM LeelooMinai: pink_vampire: Well, I will make 3D probe (optical) when I get to that point eventually...
02:40 PM LeelooMinai: But I have problems with "yak shaving"
02:40 PM pink_vampire: what do you mean by "optical"?
02:40 PM pink_vampire: not sure what are you meaning
02:40 PM LeelooMinai: I mean not based on electrical contacts, but phototransistors + diodes, etc.
02:42 PM LeelooMinai: Commercial probes use lots of different methods, like electrical contacts, light sensors, magnetic sensors, strain gauges, etc.
02:42 PM pink_vampire: and how it will be better then the kinematic one?
02:42 PM pink_vampire: i know about the 4 photo diodes and a laser beam
02:43 PM LeelooMinai: pink_vampire: The simple Renishaw type is not ideal - you can have problems with mechanical contacts in the long run. Oxidation, piutting of the material, they will tend to "stick" etc.
02:44 PM pink_vampire: after over 2 years of using my probe, none of the above happen.
02:44 PM LeelooMinai: I read that better ones have contaxt submerged in special liquid, but meh - imo using light is the purest way, as it cannot be disturbed from outside.
02:44 PM LeelooMinai: pink_vampire: Yes, well, I guess it depends on some factors, and certainly how the probe is used and how often.
02:45 PM pink_vampire: but my optical limits die more then ones because of dust and chips (and they was covered)
02:45 PM LeelooMinai: But still, I don't just want to copy the simple design and be done with it - want to see if I can make it neater.
02:46 PM pink_vampire: use tungsten rods, and tungsten balls,
02:46 PM LeelooMinai: pink_vampire: What do you mean "die" - like break?
02:46 PM pink_vampire: stop work
02:46 PM LeelooMinai: pink_vampire: I will still use the Renishaw setup, but since it doesn't need to be conductive I have carbide rods + ceramic balls for it.
02:47 PM LeelooMinai: pink_vampire: Yes, but limit switches are exposed, while probe inside is not.
02:47 PM sync: the different methods are usually to avoid the renishaw/HH patents
02:48 PM LeelooMinai: Well, afaik they are expired by now and also, maybe, but that's not the only reason.
02:48 PM pink_vampire: the #1 reason to use non kinematic probe, is for scanning.
02:50 PM sync: I have a kinematic probe on my mover, works quite well
02:51 PM LeelooMinai: Hmm, I just got my NVMe drive and PCIe adapter - I guess today I find out if it works on my PC after the BIOS "surgery"...
02:52 PM LeelooMinai: If I am gone from IRC for a week - it didn't :p
02:52 PM sync: not sure if you need bios surgery if you don't want to boot of it
02:52 PM LeelooMinai: I want to boot from it - it's the system disk.
02:53 PM pink_vampire: LeelooMinai: what are you going do to with the probe?
02:53 PM LeelooMinai: pink_vampire: Probe stuff? :)
02:53 PM pink_vampire: and by that you mean?
02:53 PM LeelooMinai: I mean, I don't want to use mechanical finder - I find it lame...
02:54 PM LeelooMinai: I have one, but it makes me sad.
02:54 PM pink_vampire: you mean the manual edge finder?
02:54 PM LeelooMinai: Yes, a cylinder type. Also, it's only for sides, not Z, so fail.
02:55 PM LeelooMinai: I want to be able to load g-code to sample a surface in 1mm grid and get data on how flat things are, etc.
02:55 PM pink_vampire: without a tool setter you don't need the probe for the Z axis
02:56 PM LeelooMinai: pink_vampire: I was more thinking about a scenario where, say, I put a surface plate on the bed and scan it with the probe to see how my axis are, etc.
02:57 PM pink_vampire: for all the above the kinematic probe going to give you better results. all the other are better for detecting surface finish with continues scanning.
02:58 PM pink_vampire: for trimming the head of the machine is better to use the dial indicator and magnetic base
02:58 PM LeelooMinai: pink_vampire: Do not see why kinematic one would give better results - the "other" types can get to sub micron accuracy.
02:59 PM pink_vampire: because the way they work
02:59 PM LeelooMinai: Well, you probe and they work... no?
03:00 PM pink_vampire: on the other you have some lag
03:00 PM pink_vampire: the kinematic is realtime
03:01 PM pink_vampire: so the other are better for logging the data, but not very good for sending realtime signals to the motors of the machine
03:02 PM LeelooMinai: Er, everything has some lag I guess, even the kinematic one, but it all depends on the circuit used, input card, etc. Also, as long as it's faster than scanning step time, should not really mattter.
03:04 PM LeelooMinai: I think some expensive ones actually have image sensors - I mean ones with pixels, and do some processing, so ok, but I don't plan to do something like that - just one detector per direction.
03:04 PM pink_vampire: also, the kinematic give you 1 or 0, the other give you range,so you need also to calculate the absolute position from the relative reading from the prob and some how feed it to linux cnc,
03:05 PM LeelooMinai: pink_vampire: Well, you can calibrate it and then have hardware (comparator or whatever) to digitize it, so the effect should be the same.
03:05 PM pink_vampire: but it will be differential not absolute.
03:05 PM LeelooMinai: If you do some crazy DSP, ok, I guess. Though probably the latency between the input card and linuxcnc or what is used will dominate.
03:06 PM LeelooMinai: pink_vampire: Yes, well, I guess I am talking using axis themselves for absolute and using the probe only in 1/0 mode.
03:07 PM pink_vampire: don't get me wrong, scanning probe is a grate tool for scanning, and I will be happy to see diy version of one, but for edge finding, is just the wrong tool to use.
03:07 PM LeelooMinai: I did not really plan to make a probe that actually can act as some kind of micrometer by itself.
03:08 PM LeelooMinai: pink_vampire: Maybe you think I wanted to make some kind of non digital probe - no, just "normal" one detecting touch, just not based on contacts, but light interruption.
03:08 PM pink_vampire: so if you want just 1/0, whay do you want to use super fine ccd, and complex optics, just to detect 1 pixel?
03:09 PM LeelooMinai: pink_vampire: But what for... I did tests and a diode + phototransistor + good op-amp do work if you choose proper components.
03:10 PM pink_vampire: but to achieve sub micron light detection you need sub micron sensor.
03:10 PM LeelooMinai: Without any complex optics.
03:11 PM LeelooMinai: pink_vampire: Not really - when the light source moves, you will get change in the analog signal from the phototransitor.
03:11 PM pink_vampire: no
03:11 PM pink_vampire: you will have the diffraction effect.
03:12 PM LeelooMinai: pink_vampire: What diffractin effect - I tested it with a real life setup...
03:13 PM LeelooMinai: Used optic fiber cut to allow movement, but still - probably would work without it.
03:14 PM LeelooMinai: Well, forgot if I tested without it, so not 100% sure.
03:14 PM pink_vampire: and you got sub micron repeatability all the time???
03:15 PM pink_vampire: actually you can use fiber optic as a super sensitive sensor.
03:15 PM LeelooMinai: pink_vampire: 2 microns or so, but I did not even try to push it - I just fed the singal into ADC board and watched it on PC.
03:16 PM LeelooMinai: ADC was 16 bit I believe - one of Analog Devices nice "learning" boards what has software that can stream the data, graph in real time, etc.
03:16 PM pink_vampire: https://en.wikipedia.org/wiki/Fibre_optic_gyroscope
03:16 PM LeelooMinai: That was mostly to convince myself that it will work.
03:18 PM pink_vampire: still kinematic will be better, more reliable , less parts to worry about, and better readings.
03:19 PM LeelooMinai: pink_vampire: Well, I would argue that not - I mean mechanical contacts are not exactly know for reliability.
03:19 PM LeelooMinai: That's why they are usually reated for some number of uses.
03:20 PM LeelooMinai: On the other hand, a phototransistor is unlikely to break, and light, well, I hope it does not stop working:)
03:20 PM pink_vampire: if you crush your probe.. it will brake
03:21 PM pink_vampire: http://www.renishaw.com/en/omp60-optical-transmission-probe--6101
03:22 PM LeelooMinai: pink_vampire: I watched once a video from some guy that decided to make and sell his probes based on Renishaw patent and he was pretty meticulous. Had to spend a lot of time researching the contact properties, doing repeated tests, and at some point he found problems that would only happen seldom, but still.
03:22 PM pink_vampire: this is the industry standard for edge finding probe.
03:23 PM LeelooMinai: Right, there's also some other company that makes optical ones, forgot which one. But they use CCD sensors or whatever - non-simple ones.
03:25 PM LeelooMinai: Probably some German stuff
03:25 PM pink_vampire: even if you go as small as atoms. kinematics win
03:25 PM LeelooMinai: pink_vampire: Ok, but I have no idea why you think so:)
03:26 PM pink_vampire: because of physics
03:26 PM LeelooMinai: Well, it's excactly because of physics imo is why it's not a best design...
03:27 PM LeelooMinai: You have mechanical contacts and they kind of suck at reliability.
03:29 PM pink_vampire: not really.
03:30 PM LeelooMinai: pink_vampire: Yes, especially with simple design. I told you already - they need to use contacts emerged in fluids in better ones - why do you think they do this, for fun?
03:30 PM pink_vampire: ev.en in optical you have moving parts
03:30 PM pink_vampire: even
03:30 PM LeelooMinai: They do this to fight drawbacks of the desing.
03:31 PM LeelooMinai: pink_vampire: Yes, but in this case they are not critical - and you don't need to even have them contact electricity, so you can use better materials - like ceramics.
03:32 PM LeelooMinai: No problem with oxidation for once. And less pitting, etc.
03:32 PM sync: LeelooMinai: the renishaws are not filled with a liquid, they just sense the contact resistance
03:32 PM sync: they are very reliable
03:32 PM pink_vampire: ceramic vs tungsten vs few grams of force from the spring.
03:33 PM LeelooMinai: sync: Well, sure, with quality balls, rods, and all the rest, they are reliable, but not infallible - that's why there are improvements, for extra price.
03:33 PM pink_vampire: to even leave a mark on tungsten you need to apply some force
03:33 PM LeelooMinai: pink_vampire: It's not just that - it's a "sticking" effect too - some materials on contact will stick after a while.
03:34 PM LeelooMinai: Amd you will have different forces suddenly.
03:35 PM LeelooMinai: Also, btw, appareantly even that whole design is assymetrical in terms of forces for obvious reasons and there are improvments that can be made.
03:35 PM LeelooMinai: I wish I remembered the video with the guy that analyzed all of this.
03:36 PM LeelooMinai: But it's kind of obvious - in some directions you work agains one "leg" and in another, when you push between two legs, you have different leverage.
03:36 PM LeelooMinai: I think the guy designed around it, but forgot what it was and if he even has shown his solution.
03:36 PM pink_vampire: I'm using lowes grade brass rods, and ebay ball bearings, and plexiglas body for the probe, and it waaay more accurate and precise then my dial indicator. even after 2 years
03:37 PM LeelooMinai: Well good but carbide rods + ceramic balls will be even better:)
03:37 PM pink_vampire: better then what??
03:37 PM LeelooMinai: brass and steel balls...
03:37 PM pink_vampire: if your motors can do 0.01mm per step
03:37 PM LeelooMinai: brass is soft as hell
03:37 PM pink_vampire: and the probe can do 0.0000001
03:38 PM pink_vampire: i know brass is soft, but the force from the spring is very minimal.
03:38 PM LeelooMinai: pink_vampire: I am talking about the probe itself - the outside, well, I am designing the probe, so I don't worry about it.
03:39 PM LeelooMinai: pink_vampire: But the pitting.... seriously - you think that brass + steel and thousands of cyckles is a good idea?
03:39 PM LeelooMinai: No matter what the force is.
03:39 PM LeelooMinai: Also, there are weird effects between different metals - not sure about this combination, but seems suspicious.]
03:39 PM pink_vampire: also you need to re calibrate it once in a while not because of the kinematic or whatever way you take the reading, but because of the seam.
03:40 PM LeelooMinai: Yes, well, I assume calibration.
03:40 PM pink_vampire: the longer the seam the more it will deflect over time.
03:40 PM LeelooMinai: Er, need to go to help mom unpack - bbl
03:40 PM pink_vampire: and my seam is just 1/16" brass rod
03:43 PM pink_vampire: so, at the end of the day, if you know what you are doing, and you know how to make sure your probe is read correct readings, you will be able do do very good jobs , even with very poor probe.
04:18 PM roycroft: brass is medium hardness, not soft as hell (even when annealed)
04:18 PM roycroft: lots of metals are softer than brass
04:19 PM roycroft: since brass covers a wide range of alloys it's difficult to stipulate what's harder and what's softer than brass
04:20 PM roycroft: but certainly aluminum, tin, gold ,copper, and silver are all much softer than even the softest brass
04:32 PM * FinboySlick talks about his expensive speakers to skew LeelooMinai's statistics.
04:39 PM rob_h: when using an indexer with a lock.. whats best way to deal with the lock status. as i looked at the Locking Indexer option but this only works for G00
04:39 PM rob_h: is there a reason it was not exspanded for G01 use also?
04:41 PM pink_vampire: rob_h: you talk about 4th axis?
04:41 PM rob_h: 4th and 5th
04:41 PM Deejay: gn8
04:41 PM rob_h: i have a indexer table and it has a lock for the 4th and 5th, but it can also happily do contouring
04:42 PM pink_vampire: I never worked with more then 3 axis machine
04:42 PM rob_h: but you do need the locks in heavy cutting more so for stiffness
04:42 PM pink_vampire: on my machine the servos just hold the axis in place
04:43 PM pink_vampire: I don't have a lock
04:43 PM roycroft: then you don't need a gatekeeper
04:43 PM roycroft: or a keymaster
04:44 PM pink_vampire: what is a gatekeeper and keymaster?
04:44 PM rob_h: im just finishing of a refit on a matsuura
04:44 PM pink_vampire: the red one on the main page of linux cnc is yours??
04:45 PM rob_h: no
04:46 PM rob_h: mines alittle newer 97 machine
04:46 PM rob_h: the indxer here , https://imagebin.ca/v/3TirpirADmg0
04:47 PM roycroft: well, zuul is the gatekeeper of gozer
04:48 PM roycroft: and vinz lortho the keymaster of gozer
04:49 PM pink_vampire: you make me scream!!!!!!
04:49 PM pink_vampire: not funny not funny not funny not funny
04:49 PM CaptHindsight: old geezer
04:50 PM CaptHindsight: my favorite line from that movie or was it the sequel "and i want to get a sample of his brain"
05:04 PM CaptHindsight: rob_h: what model #?
05:04 PM rob_h: off?
05:04 PM CaptHindsight: the matsuura
05:05 PM rob_h: little 600vf
05:05 PM rob_h: just 8k spindle double wind motor
05:06 PM CaptHindsight: I'm going to upgrade the spindle on a 760
05:07 PM rob_h: to?
05:07 PM CaptHindsight: something in the 20k rpm range
05:07 PM rob_h: the matsuura horizontal next to it has a 15k spindle 30hp , that can remove some metal hard and fast
05:09 PM rob_h: problem getting up in the speed range i find is need the tooling for it
05:10 PM CaptHindsight: yeah, you pay for the extra
05:10 PM rob_h: plus downside is the long warm up time on the spindle
05:10 PM rob_h: not too bad day to day on the matsuura hour and your ready day to day
05:11 PM rob_h: but skip aday or afew and its quite a warm up
05:35 PM LeelooMinai: So, I just took out that NVMe "drive" from the box and it's ridiculous - a tiny-tiny pcb with just connector few caps and the ICs. Doesn't deserve a name of drive of disk any more:)
05:36 PM LeelooMinai: "in the old days, I could throw a HDD at someone - use it as a weapon"
05:38 PM LeelooMinai: Hmm, I just throught that my south wall has aluminum siding that is made from 4 inches or so horizontal pieces, each at a decent angle for solar - someone should create a glue on solar modules that would fit sidings like that... I think vinyl ones are similar.
05:40 PM LeelooMinai: Er, no, I think I got it wrong - it's too close to vertical. Decent for winter, but for summer it should be more flat.
05:40 PM LeelooMinai: So, motorized ones:)
05:41 PM LeelooMinai: Maybe with one of those memory wires, so it's all as simple as posiible.
05:41 PM LeelooMinai: You put current through it to set an angle and there's some latch-like plastic part that will stay in place when force is unaplied.
05:42 PM LeelooMinai: You would only need really to change it monthly or so, so power usage is not a problem.
05:44 PM LeelooMinai: Hmm, could be pretty cool - scalable, easy to install, should be pretty efficient, can be put on roof, on walls, whenever.
05:55 PM LeelooMinai: I need to replace my glasses - started watching a strange video about a killer frog in London, but it was about some fog that killed 12k people...
06:39 PM andypugh: Any suggestions for connectors to connect a 4th-axis to a milling machine. That means connectors that are coolant and swarf proof when mated, and that can be readily blanked off to be coolant and swarf proof when the axis is not ditted.
06:39 PM andypugh: (fitted)
06:40 PM sync: M23 andypugh
06:40 PM andypugh: I am looking at M23 circular connectors, but can’t seem to find quite the right combination of genders (prefer female-contact flange-mount plugs on the machine)
06:40 PM CaptHindsight: heh, servo or stepper, encoders, channels?
06:41 PM andypugh: I quite like the M23 hybrids, but they only have 8 signal wires, and I have differential encoders and Hall sensors.
06:41 PM GeneWork: looking for rack and pinion source to support an 8mm diameter pinion with 20 pitch
06:43 PM BeachBumPete: andypugh my Cincinatti has the barrel type milspec style connectors on the fourth axis inputs
06:43 PM CaptHindsight: http://www.molex.com/molex/products/family?key=crc_compact_robotic_connectors&channel=products&chanName=family&pageTitle=Introduction
06:44 PM andypugh: GeneWork: http://www.hpcgears.com/pdf_c33/22.3.pdf
06:44 PM CaptHindsight: http://www.molex.com/molex/products/family?key=minihmc&channel=products&chanName=family&pageTitle=Introduction
06:45 PM CaptHindsight: GeneWork: where are you located?
06:53 PM CaptHindsight: andypugh: how often will they be plugged/unplugged?
06:54 PM Frank_10: staying on topic: easy and good way to wire up the stepper motor cables to the cable that goes to the cabinet?
06:54 PM Frank_10: who am i kidding its a stupid question and not on topic lol
06:59 PM CaptHindsight: most curcular connectors only have ~50 cycle durability rating on the contacts
07:13 PM andypugh: Hmm, probably more often than that.
07:14 PM andypugh: Frank_10: For stepper motors I quite like the Neutrik Speakon connectors. They are very solid feeling connectors for the price.
07:18 PM LeelooMinai: Cheap Chinese aviation style ones work fine imo:)
07:21 PM LeelooMinai: For 1/10 the price
07:24 PM * SpeedEvil wishes wireless wires were a thing.
07:38 PM dioz: yo someone gimme a good moving gantry 4' x 8' table design
07:38 PM dioz: DIY
07:39 PM dioz: does one need to account for linear expansion whilst constructing as accurate as possible machine?
07:47 PM SpeedEvil: Of course.
07:47 PM SpeedEvil: Though that rather depends on the accuracy
07:48 PM SpeedEvil: 'accurate as possible' implies air bearings running on granite and similar.
07:48 PM SpeedEvil: Being able to mill plywood flat to within three nanometers may be overkill in some cases though
07:52 PM Frank___: well thats like holding paper with a lingot of gold
07:56 PM * SpeedEvil looks at his ingot of gold being used as a paperweight.
07:57 PM renesis: you can change wood prob 100nm by blowing on it hard
07:58 PM roycroft: or opening an outside door
07:58 PM renesis: that might take a couple minutes tho
08:03 PM SpeedEvil: Hmm. I make it ~1PSI would crush 10cm of wood 100nm or so
08:04 PM andypugh: “crush” might be a slightly strong word.
08:25 PM Gene_home: https://www.flickr.com/photos/100017731@N03/15967931302/in/dateposted-public/
09:20 PM LeelooMinai: lol @ robotwars post final talk "-- Any improvements for the next year?" "-- I am going to learn to weld..."
09:21 PM LeelooMinai: Not sure if it's a good idea to make a robot and not be to sure about welds.
11:06 PM BeachBumPete: Woohoo just managed to get dinner done, do a full tune up and oil change on my Van and cleaned up my shop all since about 6:45.... not too shabby!!
11:36 PM Tom_itx is now known as Tom_L