#linuxcnc-devel | Logs for 2015-10-13

[09:42:38] <seb_kuzminsky> morning
[09:45:02] <skunkworks> morning!
[09:45:49] <cradek> wheeee
[09:45:57] <skunkworks> wheee?
[09:46:05] <cradek> everything is great, didn't you notice?
[09:46:13] <skunkworks> well - yes?
[09:46:23] <cradek> yay!
[09:49:25] <skunkworks> dad got done drilling 7000 .05 holes.
[09:49:40] <skunkworks> broke 1 drill
[09:50:05] <cradek> not in the one part that has 6978 holes I hope
[09:50:52] <skunkworks> it is a vaccum table.. all holes go in 1 sheet of 1/4" aluminum
[09:51:27] <cradek> the broken drill didn't hurt it?
[09:52:33] <skunkworks> it was almost through. he got it out.
[09:53:53] <seb_kuzminsky> whew
[09:55:28] <skunkworks> the plan was - if any drilles broke - back drill and push them out
[09:56:25] <skunkworks> was able to do about 5 a minute I think
[09:56:53] <skunkworks> some were going through about .3"
[10:06:29] <cradek> what machine did you use? you'd like 10krpm for that wouldn't you?
[10:23:49] <skunkworks> we used the k&t with a 20k die grinder mounted in it
[10:24:18] <cradek> wow you peck drilled with that slow table?
[10:26:18] <skunkworks> heh - slow
[11:55:20] <mozmck> I'm having a strange problem where halui.estop.is-activated seems to not be working on 32-bit installs, but it works on my 64 bit systems.
[11:56:04] <mozmck> As far as I can see so far everything else is equal.
[11:56:07] <cradek> oof
[11:57:53] <jepler> Linux rat 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian 3.4.55-4linuxcnc i686 GNU/Linux
[11:58:00] <jepler> I have this machine handy, how can I reproduce the problem with a sim config?
[11:58:22] <mozmck> hmm, I will have to try and narrow it down.
[11:59:12] <mozmck> I'm using preempt-rt and xubuntu 14.04 for 32 bit, but the 64-bit systems I've tested on are linux mint 17
[12:01:24] <jepler> also preempt-rt ?
[12:06:28] <mozmck> Hmm, no, the 64-bit have been sim configs so far.
[12:07:47] <mozmck> Maybe I should make sure my gui is actually putting linuxcnc in estop. I have a single button for estop/estop reset and machine power.
[12:08:46] <cradek> yeah my step 1 is always try [whatever] with sim/axis
[12:09:24] <mozmck> yes, I need to test more. thanks for the tips/questions.
[12:10:23] <jepler> running tklinuxcnc because I am remote from that machine, but after adding HALUI=halui in tklinuxcnc.ini and immediately after start I see this in halcmd show
[12:10:26] <jepler> 7 bit OUT TRUE halui.estop.is-activated
[12:10:59] <jepler> and it behaves as expected when entering/leaving estop with F1
[12:11:22] <seb_kuzminsky> jepler: what, not keystick?
[12:11:53] <jepler> I'm happy to test further, but I'll wait until the how to reproduce doesn't need a UI I don't have
[12:11:58] <jepler> seb_kuzminsky: silly me
[12:11:59] <cradek> we should've renamed that one "blue" while we had the chance
[12:13:10] <jepler> opportunity missed
[12:25:49] <jepler> having a more powerful laser on a better frame sure sounds like fun, but doing proper laser safety sounds boring and tedious. (seems like good practice envolves a full enclosure with a window made of $100+/ft2 optical filter material)
[12:38:31] <seb_kuzminsky> how about an opaque enclosure with a $5 webcam in in?
[12:40:48] <pcw_home> or something like a dust boot that limits the exit angle of reflections so a low shield is all these needed
[12:40:59] <pcw_home> all thats needed
[12:41:49] <ssi> fwiw, and I know my opinion on the matter is somewhat compromised given my experience, the need for a full enclosure is pretty overstated
[12:42:03] <ssi> I had no problems with reflections or lack of beam containment
[12:43:23] <pcw_home> Are you going to build another one?
[12:43:27] <ssi> and if you do choose to enclose, you don't need expensive filter material, you can use lexan. The lexan will char and bubble if it takes a high energy hit, but that's enough to a) stop the beam and b) let you know that you have a beam issue
[12:43:31] <ssi> pcw_home: certainly
[12:44:06] <ssi> I just can't decide how I want to do my motion platform yet
[12:44:16] <ssi> the one thing that I really wish I'd had was more Z focal range
[12:44:21] <ssi> most machines do that with a drop bed
[12:44:24] <ssi> which is cumbersome to build
[12:44:28] <pcw_home> Lexan will char with 10.4 u not 5W Blue LED
[12:44:52] <ssi> well I assumed what he meant by "more powerful laser" was CO2
[12:45:05] <ssi> since that's the best bang for the buck for the DIY budget
[12:45:37] <pcw_home> I think Jepler is starting at 200 mW so almost anything is more powerful
[12:45:39] <ssi> and you can SEE the blue laser, not so much the 10,4
[12:46:09] <pcw_home> Yeah
[12:48:25] <ssi> and I think 40W chinese co2 lasers are actually cheaper than 5W diodes
[12:48:30] <ssi> even with the power supply
[12:49:09] <ssi> http://www.alibaba.com/product-detail/High-power-red-diode-laser-635nm_60119435996.html?spm=a2700.7724857.35.1.RzpGfJ&s=p
[12:49:12] <ssi> maybe not! dahahah
[12:50:11] <ssi> jepler: also, you can get away with just buying some good laser glasses
[12:50:24] <ssi> eyes are the only real concern imo
[12:50:35] <ssi> I took an 80w unfocused shot to the hand, and it's like a bee sting
[12:50:41] <ssi> no worse than catching a hot aluminum chip off the mill
[13:03:34] <cradek> yes he uses some goggles
[13:03:39] <cradek> it's sure nice that it's visible
[13:04:34] <cradek> I'm surprised lexan = polycarbonate is any use, because it's clear to blue light
[13:06:09] <cradek> https://commons.wikimedia.org/wiki/File:VisibleLightSpectrum2.svg#/media/File:VisibleLightSpectrum2.svg
[13:07:00] <cradek> or is most of the power of jepler's blue laser below blue?
[13:10:42] <pcw_home> Lexan is good for CO2 since it absorbs infrared, not much use for blue
[13:11:28] <cradek> it looks like it has a very sharp and useful cutoff
[13:12:46] <pcw_home> Is it 445 nm? thats seems a common wavelength
[13:13:20] <cradek> that plot makes it look like 390-400
[13:14:04] <pcw_home> Here's a 2W 445 nm
[13:14:06] <pcw_home> http://www.amazon.com/2W-445nm-M140-Blue-Diode/dp/B00B6DNH5K
[13:14:07] <pcw_home> getting pretty cheap
[13:25:32] <ssi> I want to build a laser tag system for airplanes
[13:25:37] <ssi> I wonder what lasers would be ideal for that
[13:25:46] <ssi> it'll need to have some range
[13:30:12] <skunkworks> zlog
[13:35:29] <skunkworks> we were told with our 1000w co2 laser - as long as we had plastic lenses/saftey glasses we where ok. no enclosure.
[13:36:31] <skunkworks> is there a rt_preempt for 10.04 in the repository?
[13:36:39] <cradek> surely it depends which plastic
[13:36:45] <ssi> cradek: not that much really
[13:36:55] <ssi> almost everything is opaque to 10,6um
[13:36:58] <cradek> I bet safety glasses are universally polycarbonate but eyeglasses are not
[13:37:02] <cradek> ah
[13:37:14] <jepler> I don't think the seller made any claims about wavelength. visually it's blue, but I don't know which blue
[13:37:15] <ssi> except ZnSe and salt crystal :P
[13:37:43] <jepler> of course who knows if the eye protection that came with this thing is adequate. it's all from china and everything else seems to be counterfeit.
[13:38:46] <ssi> https://vine.co/v/M26PDi1d1Z0
[13:38:49] <ssi> cheapy safety glasses
[13:39:02] <ssi> I bought some $40 phillips 10,6um laser goggles
[13:39:03] <jepler> (and the laser's claimed power is 300mW)
[13:39:36] <jepler> but for instance I was thinking about a 5W 445nm laser that pcw linked to recently, http://www.ebay.com/itm/Engraving-laser-head-445nm-5W-43mm-CNC-laser-diode-/231584079211
[13:40:18] <jepler> to put on my existing (but not currently operational) mill
[13:41:07] <jepler> but you can also get an entire "40W" water-cooled enclosed CO2 laser engraver for $400, then $100-200 to retrofit to linuxcnc
[13:46:31] <PCW> I wonder how fast you can modulate the cheap CO2 lasers/power supplies
[13:51:07] <jepler> I have no idea. The version I've seen has a knob to set beam intensity and an ammeter to show it
[13:52:15] <jepler> >> LAOS main board uses optocouplers for laser control (if you don't use the transistor output). In a lot of config files I found that PWM frequency is set to 1KHz.
[13:52:17] <jepler> In my system the frequency from power control panel was 21KHz. But this is a little fast for the optocouplers. The ground level get weak even with a pull-up of >470Ohm.
[14:08:45] <jepler> of course nobody is publishing datasheets you'd trust about these laser power supplies
[16:02:09] <cradek> well I think dreamhost turned off our website again
[16:03:25] <jepler> *impotently shakes fist at the universe*
[16:05:10] <cradek> alex_joni: anything you can do would be appreciated by many
[16:11:14] <skunkworks> so when ever I use my android - andchat disconnects, reconnects and so on
[16:11:21] <skunkworks> sorry
[16:11:43] <Tom_itx> cradek, not all of it
[16:11:55] <Tom_itx> http://linuxcnc.org/docs/2.7/html/
[16:11:58] <Tom_itx> works here
[16:14:38] <seb_kuzminsky> i get 403 from www.linuxcnc.org from home
[16:15:03] <seb_kuzminsky> but ssh works
[16:16:05] <Tom_itx> i get 403 also
[16:17:15] <seb_kuzminsky> ooh, no 403 from docs/
[16:17:19] * seb_kuzminsky investigates
[16:17:42] <seb_kuzminsky> d--------- 21 emcboard pg167418 4.0K Sep 8 11:28 www.linuxcnc.org/
[16:18:03] <seb_kuzminsky> anyone want to own up to that blooper, or have we been hacked again?
[16:18:36] <Tom_itx> i claim innocent. it's above my paygrade
[16:20:22] <Tom_itx> wiki link from docs works too
[16:41:50] <jepler> seb_kuzminsky: I think that dreamhost does that (chmod 000) when they decide something's wrong with your website
[16:54:26] <skunkworks> I would guess dreamhost figured out that the security problem wasn't fixed
[16:55:19] <jepler> http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/
[16:58:57] <jepler> (arxiv link inside)
[17:15:09] <seb_kuzminsky> ok, i won't un-chmod it then
[17:22:02] <seb_kuzminsky> re: the most interesting star, i prefer to think it's the OnOff star from A Deepness in the Sky
[17:24:07] <seb_kuzminsky> http://us.macmillan.com/excerpt?isbn=9780812536355
[18:07:23] <andypugh> Wierd, I know I have read that, but I can’t recall the plot at all. However the names are very familiar.
[20:16:45] <jepler> seb_kuzminsky: how are your feels about putting a version of this patch seen last month on the mailing list in 2.7?
[20:16:48] <jepler> > Date: Sun, 20 Sep 2015 15:28:30 -0500
[20:16:51] <jepler> > Subject: [PATCH] WIP hm2_eth: batch writes from hm2_force_write
[20:17:20] <jepler> actual Subject: Re: [Emc-users] Ethernet Hostmot2 (drop packets at init)
[20:18:19] <jepler> Nicklas Karlsson said today that it fixed his problem, but AIUI he is not using real mesa hardware
[20:34:15] <PCW> I think He's using a ST micro ST32F407 or some such
[20:36:08] <PCW> Sort of wish Hostmot2 had complete discovery ( like sserial ) so you could just add stuff and the HAL pins appear
[21:33:28] <jepler> next year with hostmot3 ;-)
[23:17:06] <skunksleep> I should be sleeping..