#linuxcnc | Logs for 2014-08-02

[02:15:04] <Deejay> moin
[06:58:33] <jthornton> wow I slept in today
[09:36:47] <PetefromTn_> mornin folks
[10:33:20] <PetefromTn_> https://www.youtube.com/watch?v=z3x_kYq3mHM Kinda neat idea.
[10:34:02] <XXCoder2> nice it does drain quite a bit though
[10:34:41] <PetefromTn_> apparently not. He showed it off all weekend and still started the car in the morning on monday.
[10:34:58] <XXCoder2> I rather build a new battery with old lathinium ion laptop batteries
[10:35:03] <PetefromTn_> If you are not the type who runs the car stereo with the engine off it would be fine I think.
[10:35:06] <XXCoder2> wonder how much cells it would take.
[10:35:34] <PetefromTn_> apparently the whole thing weighs like a half pound!
[10:35:46] <XXCoder2> compared to lead battery billions
[10:35:49] <XXCoder2> not bad
[10:36:00] <XXCoder2> I want to be rid of lead batteries permently. lead is toxic!
[10:36:25] <PetefromTn_> I just thought it was pretty cool idea.
[10:36:30] <XXCoder2> it is
[10:36:36] <PetefromTn_> I am sure it could be improved upon as well.
[10:36:37] <XXCoder2> capactors is getting better all time
[10:36:52] <XXCoder2> did you see kickstarter of capactor battery AAA?
[10:37:11] <XXCoder2> its apparently new type, holds nearly as much power ad regular aaa
[10:37:29] <PetefromTn_> he said those caps are like ten bucks or something each so probably more expensive than a typical car battery but if you are into low weight high efficiency car builds it would be worth a look.
[10:37:55] <XXCoder2> heh it will last FOREVER too
[10:38:08] <XXCoder2> 2x cost but lasts 10x or more longer? hell yes
[10:38:30] <XXCoder2> https://www.kickstarter.com/projects/shawnpwest/30-second-charging-rechargeable-battery
[10:42:47] <SpeedEvil> 10* longer - and will almost immediately discharge if you leave the ligths on for a minute when shutting off the engine
[10:43:19] <XXCoder2> yeah not quite ready eh
[10:43:29] <XXCoder2> but then this graphite capactors might do it.
[10:47:31] <XXCoder2> PetefromTn_: https://www.kickstarter.com/projects/shawnpwest/30-second-charging-rechargeable-battery/posts/926461
[10:47:37] <XXCoder2> this explains how you could make one
[10:58:34] <SpeedEvil> Right - great. Now 'kids toy' can be a LCD thing that uses 1mA.
[10:58:48] <SpeedEvil> So the total capacity exhibited may be 20mAh.
[12:04:40] <IchGuckLive> hi all B)
[12:05:12] <IchGuckLive> Quiet night today
[12:05:42] <IchGuckLive> just moments ago USA recived the first EBola pationt
[12:10:10] <IchGuckLive> hi fenugrec
[12:10:44] <fenugrec> hi guys, hi IchGuckLive
[12:11:06] <IchGuckLive> how has ben your router running today
[12:12:04] <fenugrec> I'm having trouble understanding what is meant by "Straight feed in concave corner cannot be reached by the tool without gouging" , I suspect I may have set my tool orientations wrong (running a XZ lathe here)
[12:12:36] <IchGuckLive> your G41 CRC ofset does not fit the path
[12:12:41] <fenugrec> (IchGuckLive I have a lathe, and it seems to be running fine - except for some minor problems I still have to iron out)
[12:12:52] <CaptHindsight> somebody put a voltage regulator on a capacitor and put it up on Kickstarter and has raised over $10K so far
[12:13:43] <SpeedEvil> CaptHindsight: For amusement.
[12:13:54] <SpeedEvil> Go and look up the datasheet of the li-ion capacitors he's using.
[12:14:04] <SpeedEvil> Now, work out the actual mAh of thecells he can make.
[12:14:07] <SpeedEvil> Pitiful.
[12:16:08] <fenugrec> IchGuckLive, that's kind of a problem - my toolpath is like this http://pastebin.com/wKsY2sk2 ; and few dozen lines similar to the last 4. Trouble comes with G0, like you say it wouldn't fit the path...
[12:16:17] <SpeedEvil> Also - typical AA capacity = 2Ah. Assuming a 100% efficient charger, that requires a 120A charger to charge the battery in 30 seconds,
[12:16:37] <CaptHindsight> is that a linear regulator?
[12:16:50] <CaptHindsight> https://s3.amazonaws.com/ksr/assets/002/236/633/55036a3babf395b9851257c0be070ac8_large.jpg?1404674612
[12:17:13] <fenugrec> IchGuckLive so I'm not sure if I should somehow change my postprocessor, or disable gouge checking...
[12:17:17] <SpeedEvil> CaptHindsight: Almost certainly, yes
[12:18:41] <CaptHindsight> does kickstarter sell their donations list? I'd like to get a copy to use as a mail list for my sale on famous bridges and wetlands in Florida
[12:21:05] <IchGuckLive> fenugrec: yiu shoudt always give the first line all ofsets negative
[12:21:16] <IchGuckLive> and end with all ofsets negatic 2
[12:22:47] <fenugrec> what offsets ?
[12:24:37] <IchGuckLive> G40
[12:24:42] <IchGuckLive> G49
[12:25:08] <IchGuckLive> can you give me the line for T5 inside your Tooltable
[12:25:31] <IchGuckLive> just post it in here
[12:25:59] <fenugrec> IchGuckLive : T5 P5 X31.489 Z0 D0.5 I50.000000 J3.000000 Q2 ;sdjcr
[12:26:31] <fenugrec> (I already have G40 and G49 at the top of my program but I didn't paste it)
[12:26:53] <fenugrec> (units are mm)
[12:26:57] <IchGuckLive> ok thats why you shoudt normaly post all your g-code ;-)
[12:29:17] <fenugrec> yeah I cut the sample a bit short. Here's a better paste http://pastebin.com/ED1mkP3E )
[12:30:44] <fenugrec> with the tool diam 0.5mm, it won't "fit" when I do X63.1; Z-7.15; X63.54; Z0.225
[12:31:37] <fenugrec> hmm I guess the easiest is to go back in my CAM and set the X retract to be at least 0.5mm
[12:31:50] <fenugrec> but, yuck. I hadn't thought of this.
[12:39:08] <IchGuckLive> why does the campost not give you a G40 on the out X to be moving Z +
[12:39:49] <IchGuckLive> it shoudt acct as follow Move G0 towards X Z save
[12:39:58] <IchGuckLive> G42
[12:40:05] <IchGuckLive> move inwards to X
[12:40:18] <IchGuckLive> move Z
[12:40:22] <IchGuckLive> move X save
[12:40:26] <IchGuckLive> G40
[12:40:36] <IchGuckLive> G0 Z save
[12:43:18] <fenugrec> hehe I can't remember seeing an option to emit a G40 for every retract move. what's "save" ?
[12:43:47] <IchGuckLive> save is double crc
[12:44:49] <IchGuckLive> X64.4
[12:45:00] <IchGuckLive> wikk work nice
[12:45:04] <fenugrec> well I set all my tools in the CAM as radius=0 , to have the cutter comp happen in linuxcnc
[12:46:09] <IchGuckLive> i assume you got a S in your G-code
[12:46:30] <IchGuckLive> 2.6.0 fails on no s and move X -
[12:47:12] <fenugrec> I'm running 2.5.4, but the only S I have is "G96 S100 D600 M4"
[12:47:28] <fenugrec> oh you mean I need for example G97 S100 M4 before, so it has a "preset" RPM ?
[12:48:29] <IchGuckLive> no not nessesary in 2.5.4
[12:48:56] <fenugrec> ok
[12:51:08] <IchGuckLive> her Gcode runs perfect
[12:53:21] <gambakufu> I have a gcode file that contains loops and the file is loading VERY slowly. is this a known issue? turning off axis preview isn't helping...
[12:53:30] <gambakufu> version 2.5.4, btw.
[12:54:07] <IchGuckLive> gma yes it is
[12:54:28] <IchGuckLive> gambakufu: interpreter is maybe confused by the loops
[12:55:04] <gambakufu> is there anything I can do about it?
[12:55:17] <IchGuckLive> also if you doint shut down axis proper by menue the .ko is not rejekted and the loop takes very long to load
[12:55:50] <IchGuckLive> gambakufu: if your g-code is not secret are you able to paste it
[12:56:45] <gambakufu> sure: http://pastebin.com/sQq5ExN6
[12:57:26] <gambakufu> actually, there's an infinite loop there, now that I see it, but even before, with just one loop, it took a long time
[13:01:36] <IchGuckLive> i see
[13:02:03] <IchGuckLive> gambakufu: you did see the simple python files for makeing gcode to get ahad of this
[13:02:22] <IchGuckLive> it adds real gcode lines and its within seconds done
[13:03:24] <gambakufu> haven't heard of it.
[13:03:33] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_LinuxCNC_G-Code_Generators#Rectangular_Circular_Pocketing_Generator
[13:03:38] <gambakufu> thanks
[13:04:08] <IchGuckLive> you can open them inside axis direct and give the numbers you like and then get the gcode towards axis in one shot
[13:05:04] <IchGuckLive> ;-) yes im the writer of the code sorry as it may not work proper you like
[13:06:52] <gambakufu> I'm sure it's better than what I have now and as it's open source i can always modify :)
[13:10:43] <IchGuckLive> are you going to test it ?
[13:11:24] <IchGuckLive> havent test this since 2.4.3
[13:11:58] <gambakufu> IchGuckLive: probably, but not right now.
[13:12:07] <IchGuckLive> ok
[13:13:35] <IchGuckLive> let me try your code irs R100 Depth 5 full down at F100 XY
[13:13:44] <IchGuckLive> gambakufu: the tool diameter is
[13:14:03] <IchGuckLive> and startpoint at X0 Y0 ?
[13:14:13] <IchGuckLive> circle center
[13:19:20] <gambakufu> circle center should be where ever the cutter is right now.
[13:19:38] <gambakufu> but I've fixed the code and it's loading fast now...
[13:19:40] <IchGuckLive> ok still works with the pathpreview fault i wars fighting years ago
[13:20:37] <IchGuckLive> so you came out best to go
[13:21:12] <IchGuckLive> ok im off for today BYE
[13:21:21] <gambakufu> later. thanks for the help.
[13:35:17] <MrHindsight> what's a good setup for high volume rigid tapping of 1/4"-20 and 3/8"-16 in 6061 t-slot? The t-slot comes extruded with the appropriate hole size.
[13:36:28] <archivist> making sure you have the right machine taps and lube
[13:36:34] <MrHindsight> Not sure if I have time to make a dedicated machine for this but I might just have to
[13:38:00] <MrHindsight> spindle mounted on a single axis positioner with a fixture for the t-slot
[13:38:51] <MrHindsight> t-slot lengths might be anything from 1-210"
[13:47:06] <MrHindsight> or maybe a right angle adapter for a dedicated mill
[14:24:29] <MrHindsight> http://www.bigkaiser.com/video-megasynchro.php
[14:28:57] <MC500> is the 7I80HD Ethernet Anything I/O card supported by LinuxCNC
[14:29:40] <MrHindsight> MC500, hm2-eth is in master as of last week
[14:30:30] <MrHindsight> it's been working for several weeks at up to 2KHz IIRC
[14:38:00] <MC500> does it support analog and digital io, who make it?
[14:38:02] <MC500> makes
[14:38:12] <MC500> makes shit I cant type
[14:41:52] <MC500> oh I get it, its a feature of EMC
[14:42:00] <MC500> er LinuxCNC
[14:42:51] <MC500> so is control over ethernet some kind of defacto standard, will it work with any ethernet i/o controller that complies?
[14:46:03] <CaptHindsight> it has to be on a dedicated point to point connection, not shared, I think that it works better on some NIC's more than others
[14:46:17] <CaptHindsight> USB NIC's would be out for obvious reasons
[14:46:36] <CaptHindsight> but motherboard, PCI or PCIe should work
[14:49:05] <MC500> That was my next question, I bet cheap software NICs dont work as well either
[14:49:40] <MC500> I suppose they could.. but the driver would be key, not just simple hal intergration
[14:52:00] <MC500> so will it work with the 7I80HD Ethernet Anything I/O card, are there other Ethernet based IO moduels out there Mesa seems to be well supported and liked by LinuxCNC
[14:53:12] <cradek> are you going to be experimenting and helping development, or controlling a real machine?
[14:54:43] <MC500> hoping real machine, Im not a developer.. though my company is getting there we are week in the softare development department
[14:54:59] <CaptHindsight> http://store.mesanet.com/index.php?route=product/product&product_id=62
[14:55:33] <cradek> then you don't want to run master and you don't want to pick hardware that is so recent.
[14:55:35] <MC500> Though we intend on hiring people to develop for some of our medical insturments, this would be a very nice product to have
[14:56:07] <MC500> I am going to beat my sevo to go card into submission and use it untill this works for now :)\
[14:56:23] <cradek> for real machining work, you should probably pick hardware that runs with the stable 2.6 release
[14:56:32] <CaptHindsight> "The 7I80 is compatible with all of Mesa’s 50 pin daughtercards."
[14:57:53] <MC500> wow the7I80HD is $150 bucks?? wow
[14:58:38] <pcw_home> CaptHindsight: Thats a forward looking statement :-)
[14:59:31] <pcw_home> (doesnt work with the resolver interface yet due to my lazy programming )
[15:01:19] <MC500> my god my servo to go card was around a grand I cant believe how much this stuff costs now
[15:02:21] <Jymmm> MC500: If you want a cheap hobby, go collect baseball cards! Oh wait... nevermind, no such thing as a "cheap" hobby =)
[15:08:53] <Jymmm> (these days that is)
[15:10:00] <Loetmichel> grr. i definetly want faster internet... captured a 20 minute run in Elite:Dangerous 3.5 hours ago... 2.8gb 1024*768 h264... now 50% upload complete. youtube says "215 minutes left" :-(
[15:10:31] <MC500> most kits on the Mesa site are $200.00 or less, thats cheaper than base ball cards
[15:10:48] <Jymmm> lol, no shit huh
[15:11:26] <CaptHindsight> http://www.nytimes.com/2014/08/02/us/reanimating-bertha-the-mechanical-behemoth-stuck-under-seattle.html?_r=1
[15:12:34] <MC500> thats a big drill
[15:13:33] <MC500> slightly bigger than the one I am thinking of buying but same basic idea
[15:16:22] <toastydeath> they do make itty bitty tunnel bores
[15:19:27] <SpeedEvil> toastydeath: they're available on ebay
[15:19:44] <SpeedEvil> http://www.ebay.co.uk/itm/Grundomat-50mm-Pneumatic-Mole-/131243082706?pt=UK_BOI_Industrial_Tools_Construction_Tools_ET&hash=item1e8eb283d2
[15:19:44] <toastydeath> i think they're called pipe jackers
[15:19:53] <toastydeath> no no
[15:19:54] <toastydeath> i mean like
[15:20:00] <toastydeath> 2 foot diameter tunnel bores
[15:20:08] <toastydeath> for installing things like sewers
[15:20:38] <SpeedEvil> ah
[15:24:55] <MC500> wow the 8I20 2200W 3 Phase Amplifier is qute a bit less spendy than Baldor...
[15:35:06] <skunkworks_> MC500: mesa is awesome
[15:47:15] <Solarlux> Hello all
[15:50:03] <CaptHindsight> http://www.productionmachining.com/articles/reducing-thrust-loads-during-rigid-tapping vs http://www.productionmachining.com/articles/rigid-tapping--sometimes-you-need-a-little-float
[15:51:32] <Solarlux> CaptHindsight Hello
[15:51:46] <CaptHindsight> howdy!
[15:52:03] <Solarlux> Fine thanks
[15:52:09] <Solarlux> And u?
[15:53:06] <CaptHindsight> great
[16:22:19] <PetefromTn_> that is not surprising to me actually the first shop I worked in used floating tap heads even tho the machines were equipped with rigid tapping. They said it is easier on the taps and more forgiving of slight programming errors.
[16:22:44] <PetefromTn_> I cannot wait to get my machine setup with the damn spindle encoder so I can rigid tap and that will be the first step to toolchanger operation.
[16:23:08] <Deejay> gn8
[16:23:17] <PetefromTn_> Gn8 deejay!
[16:24:05] <Deejay> nighty pete :)
[16:31:52] <toastydeath> tbh rigid tapping only makes sense if you're using form taps
[16:32:01] <toastydeath> i don't understand why you'd rigid tap with a cut tap
[16:32:24] <PetefromTn_> yeah well the second shop I worked in did it on basically everything.
[16:32:43] <PetefromTn_> I like form taps but have only used them a handful of times.
[16:32:56] <PetefromTn_> I have some nice metric ones in the shop I have yet to find a need for.
[16:35:53] <zeeshan> toastydeath: whats wrong with rigid tapping on a cnc
[16:36:06] <toastydeath> nothin'
[16:36:20] <toastydeath> it's just one of those things that i'm like
[16:36:23] <toastydeath> "why did this happen"
[16:36:29] <toastydeath> you can't run cut taps super fast
[16:36:40] <zeeshan> yea they'll snap
[16:36:41] <zeeshan> haha
[16:36:59] <zeeshan> i had to tap 20 holes the other day in aluminum
[16:37:00] <zeeshan> 1/4-20
[16:37:01] <zeeshan> by hand
[16:37:10] <zeeshan> i was really wishing i had rigid tapping at that moment :p
[16:59:29] <humble_sea_bass> zeeshan: read this book, it saved my life
[16:59:31] <humble_sea_bass> http://37.media.tumblr.com/65b4cd0e0f4ede860368a35207301d4d/tumblr_n9p4cfePBH1s71q1zo1_1280.png
[17:26:03] <gleapsite> hello #linuxCNC. I've got ubuntu12 up and running with the real time kernal, and linuxCNC 2.6 installed and running fine
[17:26:46] <gleapsite> Now, I'm trying to figure out how to properly configure linuxCNC for my MLE-40 CNC laser
[17:29:02] <gleapsite> here's some dox I found about it: http://moderndevice.com/news/full-spectrum-engineering-40w-hobby-laser/
[17:29:36] <gleapsite> now, he recomends a page where they're building up their own controller board.
[17:30:03] <gleapsite> I *don't believe* that I need to do all that, as I can directly connect the laser via a parrallel port
[17:35:46] <gleapsite> Hmm. Seems FSE has the pinouts posted to their website : http://www.fullspectrumengineering.com/laser%20connection.html
[17:36:07] <gleapsite> sorry for asking IRC before doing a fully thorough search.
[17:40:33] <CaptHindsight> gleapsite: that links shows the pinout for STEP and DIRECTION motion control and the limit switches
[17:40:50] <CaptHindsight> but it doesn't show the control of the laser itself
[17:41:32] <CaptHindsight> oh there it is "RELAY: PWM laser power control. If high, laser is on. If low, laser is off. Setup as PWM spindle in Mach3. S1000 for 1000% power. Set S10 for 1% power. "
[18:03:21] <MrCurious> are there any usb instead of parallel port) based driver solutions that work with linux cnc (emc)
[18:25:19] <pcw_home> MrCurious: not that I know of , normally Linuxcnc requires real time I/O
[18:25:21] <pcw_home> and USB is not well suited to real time
[18:27:28] <andypugh> I film came on the TV, which I wasn’t watching ( “The Rookie” ). In the opening sequence there was a “nodding donkey” with a flat belt drive from an adjacent shed. The tension run was on the bottom, and it occurred to me that I have never seen a flat-belt run that way. (and I think that there are good reasons not to, and the film prop guys messed up)
[18:28:51] <pcw_home> Yeah thats odd
[18:30:07] <MrCurious> thats a bummer
[18:31:35] <pcw_home> is the slack part of the belt to dragging on the tension part the main reason they dont do this?
[18:33:50] <pcw_home> For a simple step/dir machine a parallel port works fine (or use a Beagle Bone Black if you dont want to use a PC)
[18:37:05] <t12> how about that bjork movie
[18:37:19] <t12> where they shoot a long scene with her hand sitting in a hydraulic break
[18:37:21] <andypugh> I went looking for evidence to support my point of view on belts, and found: https://www.youtube.com/watch?v=HY7uPSzwzPY
[18:37:29] <t12> just conversating
[18:37:33] <t12> i couldnt deal
[18:37:39] <andypugh> I can’t decise whether that supports or refutes.
[18:43:14] <andypugh> t12: Bjork is just strange. Cute as heck, but strange
[18:54:01] <MrCurious> ITS ALIVE!
[18:54:13] <MrCurious> 1 axis of delta now moving under its own power
[18:56:43] <Jymmm> perpetual motion?
[19:01:15] <MrCurious> now if only i had a selection of shunts...
[19:41:33] <Bent> Hey guys, working on a mill/3d printer. NEMA 17's with 68oz-in, probably wood construction, shapeoko 2 like design, 300x300x200mm build volume. Want it to do aluminium. My question is about linear glides. I've seen some controversy about drawer slides, what is your opinion?
[19:43:28] <archivist> drawer slides have too much play to be used for milling
[19:43:53] <Solarlux> Hello all again
[19:43:53] <Solarlux> :D
[19:46:58] <Bent> I understand drawslides have a lotf play, but do they have too much for small aluminium jobs?
[19:49:21] <archivist> play means snapped tooling and damaged work
[19:50:10] <MrCurious> bent https://www.dropbox.com/sc/q3fpn61fype8xip/AAD9cPcifrKmtlyQVaaFb4Lta
[19:50:26] <MrCurious> over engineer the shit out of it
[19:51:58] <archivist> there is a reason milling machines are far more solid than 3d printers, it is the cutting force bending and moving the spindle in relation to the work
[19:55:59] <Bent> I've seen some successful milling machines work on drawerslides, I'm only looking for something to stick a dremel on.
[19:56:33] <Bent> I think with 2 slides and a leadscrew per axis I'll be okay.
[21:06:11] <andypugh> Night all
[21:31:00] <Jymmm> When you can't have alignment pins, what's a good way to do half a job, then rotate it so you can do the other half?
[21:31:34] <Jymmm> This is a one-off job.
[21:34:35] <PetefromTn_> half vertically or half horizontally to fit inside a smaller envelope?
[21:34:59] <Jymmm> I have 12", workpiece is 16"
[21:35:13] <Jymmm> it's a matter of alignment when I rotate it
[21:35:39] <PetefromTn_> the few times I have done this I was able to use some preexisting machine holes from the first side to locate the second half.
[21:36:25] <PetefromTn_> If it has a flat side you can align to the edge of the table as well.
[21:36:34] <Jymmm> I have a sqaure in the machine, it's the workpiece I question
[21:36:34] <Tom_itx> Jymmm, mill, router, laser, edm?
[21:36:47] <Tom_itx> lathe...
[21:36:49] <Jymmm> Tom_itx: doesn't really matter I'd think
[21:37:16] <PetefromTn_> does the part have any long flat edges?
[21:37:32] <Jymmm> I can do 8" worth, then rotate and do the other 8".
[21:37:47] <Jymmm> Kinda, it's a granite tile.
[21:38:06] <Jymmm> but if alignment is off by a mm or two it will show
[21:38:12] <Tom_itx> you can't clamp some stops somewhere?
[21:38:38] <PetefromTn_> we have used alignment pins inserted into the tee slots a bunch of times to locate an edge.
[21:39:03] <Tom_itx> well he just said he can't have alignment pins
[21:39:21] <PetefromTn_> I think he meant machined into the part no?
[21:39:23] <Jymmm> Tom_itx: there is a carpteners sqaure in the machine. that's not the problem, it's the material not having a mm's accuracy
[21:39:53] <Jymmm> It's granite tile, it could be not suare for example
[21:40:07] <Jymmm> or have a rough bump on the opposite edge
[21:40:33] <Jymmm> If I can figure out the centerline ALWAYS, I'd be good
[21:40:46] <Jymmm> instead of depending on any edge
[21:40:49] <Tom_itx> you said it was a one off
[21:40:56] <PetefromTn_> your best bet is to pickup a premachined feature on the previous op
[21:41:03] <Tom_itx> there's no 'always' in a one off...
[21:41:16] <PetefromTn_> is there a line of holes or a recatangular pocket in it?
[21:41:18] <Jymmm> Tom_itx: Yeah, I try to avoid these becuse of this.
[21:41:42] <Tom_itx> so find the rough centerline
[21:41:47] <Jymmm> PetefromTn_: None
[21:41:48] <Tom_itx> and cut out from that
[21:41:59] <Jymmm> Tom_itx: This is engraving, not cutting
[21:42:01] <PetefromTn_> and what the hell are you going to mill on a ceramic tile anyways LOL
[21:42:40] <MrCurious> all 3 delta carriages running with driver
[21:42:52] <Tom_itx> nice
[21:42:53] <Jymmm> PetefromTn_: I guess you havne't seen my "Teddy Bear" http://i54.tinypic.com/k2mo7n.jpg
[21:43:25] <PetefromTn_> if you are just engraving the tile maybe make a fixture that hold the tile for flipping around and put your alignment pins on that so you can reference the tee slots.
[21:43:57] <Tom_itx> that might be your best bet
[21:44:07] <Tom_itx> then you'd have a good reference point
[21:44:35] <Jymmm> I'm bleeding the edge, there's not room for a fixture
[21:44:44] <Jymmm> s/not/no/
[21:44:52] <PetefromTn_> if you can fit the tile you can fit the fixture that holds it.
[21:45:06] <PetefromTn_> you just would need to use some kinda removable adhesive to hold it to the fixture.
[21:45:20] <Jymmm> PetefromTn_: Uh, I CANT fit the tile, that's the point.
[21:45:52] <Tom_itx> Jymmm, if the fixture was say an angle aluminum and the aluminum was _under_ the tile, you could pin it _under_ the tile and have room
[21:46:11] <Tom_itx> use double tape to hold it
[21:46:51] <Jymmm> Tom_itx: The tape gave me an idea!
[21:47:14] <Jymmm> We use tape when doing optics calibration
[21:47:38] <Jymmm> cover the optics with tape and burn a spot.
[21:47:51] <Jymmm> Move to another point on the table, burn again.
[21:48:01] <Jymmm> they should be in alignment.
[21:48:31] <Jymmm> After engraving the first half, I can but tape on the tile, and burn two spots.
[21:48:49] <Jymmm> rotate the tile, and burn spots again to verify alignment
[21:49:12] <Tom_itx> could work
[21:49:32] <Tom_itx> i'd burn 3
[21:49:44] <Tom_itx> one off alignment from the other 2
[21:49:56] <Tom_itx> use it for your X location point and use the other 2 for the Y
[21:50:24] <Jymmm> Well, once rotated, the 3rd wouldn't matter much
[21:51:23] <Jymmm> The diode laser is aligned with the cutting laser, so I can use that for rough alignment.
[21:51:49] <Jymmm> But it starts fuckign with yur eyes after 10 minutes if you keep trying to align by it
[22:11:18] <Jymmm> http://i60.tinypic.com/z1xts.jpg
[22:22:51] <ssi> silly lasers