#linuxcnc | Logs for 2016-11-19

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[01:58:56] <Deejay> moin
[02:48:32] <IchGucksLive> hi rain and windy in germany
[02:48:46] <XXCoder> hello rain and windy
[02:48:52] <IchGucksLive> ;-)
[02:49:39] <IchGucksLive> hi ICFREEDOM
[02:50:13] <ICFREEDOM> hey
[02:50:24] * Loetmichel geht mal in die Küche, stellt die Tasse unter die Saeco. *Knöbbscher drügg* *RUUUIIIIIIIII* *KlackKlack* *KlackKlack* *Miiiieeerrrrk* *Brrrrrrr* *Brrrrrrrrrrrrrrrrrrrrrrrrrrr* *Miiiiiiiifubb* ... Karamelsirup rein, Milch hinterher... *nipp* "aahh, guuuuut!"
[02:50:40] <Loetmichel> uups. wrong language. i meant: MORNIN'
[02:51:00] <IchGucksLive> coffee at that time is a realy good idee
[02:51:11] <ICFREEDOM> dropped 30 degrees in 6 hours in Wisconsin
[02:51:42] <IchGucksLive> oh in sibirian it hit -45C tonight
[02:51:48] <XXCoder> nice and cool 19c in my room
[02:52:24] <Loetmichel> XXCoder: 22.6C here... i still have goosebumps... need to wake fully ;)
[02:52:28] <IchGucksLive> im up on the plasmas so have a hard working Day :-(
[02:52:47] <IchGucksLive> Keep breaking the bits ----
[02:52:49] <XXCoder> lol. it'll be colder in my room evenually as winter deepens
[02:53:22] <Loetmichel> <- not fully awake yet. still need a coffee or two
[02:53:43] * XXCoder does not drink coffee
[02:54:51] <Loetmichel> <- "slow starter". Until i get a coffee or two in the moring i am more like sleepwalking than awake
[03:00:19] <XXCoder> this is insane. http://s3.crackedcdn.com/phpimages/article/5/7/1/581571_v2.jpg
[03:00:28] <XXCoder> who thought that awesome idea?
[03:11:26] <Loetmichel> XXCoder: who is that supposed to be?
[03:11:36] <XXCoder> no idea
[03:12:24] <Loetmichel> looks a bit like that singer that died a few years ago from drug overdose. the one with the soul voice
[03:12:37] <Loetmichel> maaan, i am getting old... what was her name?
[03:12:52] <Loetmichel> (with the beehive hairdo)
[03:13:16] <XXCoder> no idea, I only know maybe 3 musicians
[03:14:25] <Loetmichel> ... google helps
[03:14:31] <Loetmichel> amy winehouse ;)
[03:15:29] <Loetmichel> wow, she died in 2011... is it THAT long already? time flies... :-(
[03:16:37] <XXCoder> older we are faster time is
[03:16:54] <XXCoder> we lived 50% of experence at 18 years old
[03:17:11] <XXCoder> more if boring life, less if travel a lot experence new things
[03:18:05] <Loetmichel> this year wasnt a good one for musicians anyway
[03:18:23] <Loetmichel> the good ones died in droves
[03:19:31] <XXCoder> sucks
[05:06:14] <jthornton> morning
[05:07:06] <XXCoder> boo
[05:07:13] <XXCoder> zeeshan: hey
[05:07:18] <zeeshan> hi
[05:07:21] <zeeshan> morning
[05:07:37] <jthornton> what's up this morning
[05:07:48] <zeeshan> thinking of going fishin :P
[05:07:51] <zeeshan> its warm out
[05:07:55] <XXCoder> relaxing. couldnt be arsed to print anything lol
[05:08:13] <zeeshan> you?!
[05:08:32] <XXCoder> me?!
[05:08:34] <jthornton> hanging lights in the new shop
[05:08:51] <zeeshan> led?
[05:09:00] <jthornton> got the old hoe running real nice now after getting the injector pump rebuilt
[05:09:13] <zeeshan> what wears on those diesel pumps
[05:09:16] <XXCoder> garage here is led lit. looks very nice. too bad garage is a mess lol
[05:09:21] <zeeshan> is it a positive displacement pump
[05:09:24] <zeeshan> using gear rotors?
[05:09:25] <jthornton> T8 6500k bulbs, more light than led
[05:09:47] <jthornton> the governor is what wears out
[05:10:10] <jthornton> then you get little fibers plugging up the return check valve
[05:10:40] <zeeshan> http://www.tb-training.co.uk/FIE/ROPMPCOL.jpg
[05:10:47] <zeeshan> theres a lot of stuff going in there lol
[05:11:58] <XXCoder> fancy
[05:18:41] <jthornton> https://www.youtube.com/watch?v=DCPWHv2jJZE
[07:50:44] <Tom_L> 25 F
[07:54:50] <jthornton> http://gnipsel.com/logs/
[07:54:57] <jthornton> down to one markup error
[07:55:48] <XXCoder> empty page besides titkle
[07:56:26] <jthornton> link
[07:57:08] <SpeedEvil> Simple, standards compliant websites are the best.
[07:57:10] <SpeedEvil> http://iscaliforniaonfire.com/
[07:58:06] <XXCoder> fancy
[07:58:56] <jthornton> the logs?
[07:59:09] <jthornton> Tom_L: http://gnipsel.com/logs/%23linuxcnc/index.html
[07:59:41] <jthornton> now to fix the daily log back links
[08:11:37] <Tom_L> nice
[08:16:10] <zeeshan> :]
[08:16:20] <jthornton> thanks
[08:16:45] <Tom_L> does it build the indexes/
[08:16:46] <Tom_L> ?
[08:16:53] <_methods> no thank you for keeping the logs
[08:16:57] <jthornton> just need to code so the years are built in descending order
[08:17:14] <jthornton> the index.html files yes
[08:17:37] <Tom_L> so each index.html will have a calendar
[08:17:45] <jthornton> yea
[08:17:46] <Tom_L> with the title on each
[08:17:50] <jthornton> yep
[08:18:33] <jthornton> need to add some smarts so a partial year is only one row of months long...
[08:18:34] <Tom_L> what about multi year directories?
[08:18:58] <jthornton> I figure to put the older years below the current year
[08:19:06] <jthornton> page will be short enough to navigate
[08:19:16] <Tom_L> all in one directory?
[08:19:23] <jthornton> yea
[08:19:44] <jthornton> breakfast time
[08:20:02] <Tom_L> sam is so used to scanning to the bottom he'll go way back in time a few times i bet
[08:20:43] <Tom_L> what's up zeeshan
[08:20:56] <zeeshan> looking at google maps
[08:21:05] <zeeshan> and looking at how much deforestation has occured in north america
[08:21:07] <Tom_L> are you lost?
[08:21:14] <zeeshan> majority of land in the usa is frigging farm land
[08:21:26] <Tom_L> yeah we feed the world
[08:21:40] <zeeshan> all of southern ontario
[08:21:47] <zeeshan> southern manitoba, saskatechawan
[08:21:48] <Tom_L> don't piss us off or we'll starve ya
[08:21:49] <zeeshan> are frigging farm lanbd!
[08:21:57] <zeeshan> we can feed ourself :P
[08:22:15] <Tom_L> what grows up there?
[08:22:15] <zeeshan> im happy i love up in canada
[08:22:28] <Tom_L> seems like a nice place
[08:22:32] <zeeshan> everything
[08:22:39] <Tom_L> not cotton
[08:22:43] <Tom_L> that's a south thing
[08:22:50] <zeeshan> im talk about real food :P
[08:23:00] <Tom_L> although they've been growing it here quite a bit lately as an alternate crop
[08:23:01] <zeeshan> most of your vegies we can grow here
[08:23:03] <zeeshan> but things like bananas
[08:23:11] <zeeshan> and oranges and pomegrantes cannot
[08:23:27] <Tom_L> florida or califor n i a
[08:23:31] <zeeshan> yea a lot of farmers are growing corn..
[08:23:51] <Tom_L> iowa/nebraska have the best corn
[08:24:19] <Tom_L> idaho potatoes
[08:24:31] <Tom_L> california / colorado weed
[08:24:35] <zeeshan> what is maine known for?
[08:24:36] <zeeshan> in the usa
[08:24:47] <zeeshan> i notice it is heavifly forested
[08:24:49] <Tom_L> i'm not real sure
[08:24:50] <zeeshan> so is vermont
[08:24:56] <Tom_L> yuppies?
[08:25:36] <zeeshan> i also noticed
[08:25:40] <zeeshan> you guys dont have a lot of lakes
[08:25:47] <Tom_L> http://www.netstate.com/economy/me_economy.htm
[08:26:03] <Tom_L> not alot of huge ones but we do
[08:27:23] <zeeshan> todays goal is to build my damn welding cart
[08:27:26] <zeeshan> if i can get the material!
[08:27:33] <zeeshan> or start cleaning the lathe
[08:27:36] <zeeshan> thing is filthy
[08:27:44] <zeeshan> decades of neglect :P
[08:27:44] <Tom_L> was my next question ... do you have the metal
[08:28:02] <Tom_L> clean the lathe instead
[08:28:09] <Tom_L> you don't need one more project yet
[08:28:14] <zeeshan> ;p;
[08:28:22] <zeeshan> ill gert more room if i finish the weld cart first
[08:28:24] <zeeshan> to do stuff
[08:35:14] <zeeshan> i wish i could store my car somewhere else
[08:35:24] <zeeshan> so i can move the lathe in the middle of the garage to work on it
[08:35:36] <zeeshan> would be easier. after it is operational it can go back.
[08:35:47] <XXCoder> grab a carport tent
[08:35:52] <zeeshan> no way :p
[08:36:04] <zeeshan> you know how many looks the car gets when its just on my driveway
[08:36:07] <zeeshan> it's going to get stolen
[08:36:57] <zeeshan> my friend suggested buying an enclosed trailer for the truck and just storing it in the trailer
[08:36:58] <zeeshan> great idea
[08:37:07] <zeeshan> but then i realized, now i am making it even easier to steal
[08:37:08] <zeeshan> lol
[08:37:27] <zeeshan> i need an underground garage behind my house
[08:38:18] <XXCoder> why not underground everywhere
[08:38:23] <XXCoder> huge underground warehouse
[08:38:38] <zeeshan> need a hive like resident evil
[08:38:56] <SpeedEvil> With a large storage area. See Warehouse 13.
[08:39:05] <SpeedEvil> (which annoyed me because it was way too large)
[08:39:35] <zeeshan> http://www.emersonclimate.com/en-us/Brands/Vilter/Newsletter/PublishingImages/Pages/Mazak-Nexus-HCN8800-Mu-Now-In-Full-Operation-At-Vilter-Facility/Mazak.png
[08:39:37] <XXCoder> know what I want? small police booth that is vastly bigger inside.
[08:39:42] <zeeshan> i saw one of these the other day training
[08:39:44] <zeeshan> crazy tool hive
[08:39:45] <zeeshan> :D
[08:39:51] <zeeshan> (got reminded by the word hive!)
[08:40:57] <Tom_L> zeeshan take the wheels off the trailer
[08:41:05] <zeeshan> lol
[08:41:09] <zeeshan> thats not a bad idea!
[08:47:15] <tiwake> XXCoder: you should sleep?
[08:48:44] * JT-Shop lights a little fire in the shop
[09:33:30] <Jymmm> Morning folks
[09:33:59] <Tom_L> morning Mr Jymmm
[09:34:39] <Jymmm> Tom_L: You keeping my hours now?
[10:13:41] <nubcake> hi
[10:54:45] <enleth> what's the best way of shunting excess energy on a servo supply DC bus into a braking resistor - when the servo drive does not have any built-in braking resistor support?
[10:57:53] <enleth> are there any dedicated overvoltage shunt controller chips out there?
[11:02:06] <pcw_home> The analog way to do this is with a comparator with hysteresis driving a MOSFET or IGBT via a gate driver chip
[11:03:30] <jesseg> Morning folks.
[11:03:47] <SpeedEvil> pcw_home: possibly with addition of PWM to make it not so harsh bang-bang
[11:03:53] <SpeedEvil> but simple analog works too
[11:04:03] <jesseg> enleth, I'd use an LM431 and some big fat power darlington transistors
[11:04:26] <jesseg> but you could also just as easily use some big fat power mosfets or IGBT
[11:05:03] <SpeedEvil> Or just connect a large battery across the servo supply
[11:05:11] <SpeedEvil> free UPS too
[11:05:16] <SpeedEvil> (no, not really)
[11:05:40] <jesseg> or a supercap/ultracap bank with balancing resistors, that way the battery doesn't need to be replaced all the time :P
[11:06:54] <MattyMatt> how about another motor with a flywheel?
[11:07:13] <pcw_home> If you use minimum power (low power comparator no PWM) you can make it all VBUS powered so its just a 2 terminal component
[11:07:39] <pcw_home> (so no isolated power is required)
[11:07:41] <jesseg> enleth, here's the general idea, except the resistor values are for 12v, -- what is your voltage? 48v? http://videoflier.com/files/forumpics/ct110/ct110-shunt-diagram-1.png
[11:09:28] <enleth> jesseg: testing at 48V now, but the target DC bus voltage is 140-150V idle, with shunting at 185-190V
[11:09:42] <pcw_home> That not what you want (its not a shunt regulator)
[11:10:18] <pcw_home> a shunt regulator will fail almost instantly here
[11:10:30] <jesseg> enleth, the LM431 tends to have e maximum voltage of 37v, so if you're operating at higher the circuit would need some other regulation but still completely doable
[11:10:38] <pcw_home> NO!
[11:10:48] <jesseg> pcw_home, what's wrong with shunt regulation?
[11:10:50] <pcw_home> Its NOT a shunt regulator
[11:10:54] <jesseg> pcw_home, what is not?
[11:10:59] <enleth> pcw_home: a proper term for whatever I need is also what I'm looking for, by the way
[11:11:04] <SpeedEvil> how would a shunt regulator fail?
[11:11:11] <SpeedEvil> With an adequately rated resistor
[11:11:16] <pcw_home> secondary breakdown
[11:11:18] <SpeedEvil> (or other dissipative component)
[11:11:23] * SpeedEvil sighs.
[11:11:26] <jesseg> enleth, this is to keep regenerative breaking from over-voltaging your bus, right?
[11:11:28] <pcw_home> there is no such device
[11:11:29] <SpeedEvil> not if properly specced
[11:11:37] <pcw_home> it cant be
[11:11:54] <SpeedEvil> pcw_home: you are really arguing that there are no 190 volt few kilowatt resistors?
[11:12:07] <SpeedEvil> FETs also don't do secondary breakdown.
[11:12:12] <pcw_home> resistors yes transistors no
[11:12:40] <pcw_home> not ones you want to buy anyway
[11:13:08] <pcw_home> this is why is must not run in linear mode
[11:13:20] <enleth> jesseg: yes. up to 180V or so is fine, the capacitors can have that, but the servo drive mosfets would fail at 200V, so the way I understand it, I need to get anything in excess of 200V less a safety factor through a resistor
[11:14:35] <MattyMatt> how about a spark gap in a big xenon bulb?
[11:14:37] <enleth> jesseg: the mosfets are rated for 200V, the servo drive is officially rated for 180V, I assume they just corrected the mosfet rating for a safety factor to avoid customers running the thing too close against the actual limit
[11:14:47] <jesseg> enleth, okay, I'd go with like a 160v zener and N-Channel mosfets
[11:14:52] <jesseg> or IGBTs
[11:15:07] <pcw_home> that will die instantly
[11:15:18] <enleth> not much of a hysteresis in that
[11:15:20] <SpeedEvil> pcw_home: with large resistor, it's just fine.
[11:15:21] <jesseg> well you can throw in some huge resistors too
[11:15:22] <pcw_home> it must be switched fast
[11:15:30] <jesseg> enleth, why do you need any hysteresis?
[11:15:51] <pcw_home> because you dont want it to fail in 1 ms
[11:15:57] <SpeedEvil> jesseg: to stop it oscillating
[11:16:15] <jesseg> SpeedEvil, oh, to slow it oscillating?
[11:16:20] <pcw_home> no to keep the transistor out of the linear region
[11:16:25] <SpeedEvil> That too.
[11:16:37] <pcw_home> where is will die instantly
[11:16:38] <jesseg> a shunt with hysteresis is by definition an oscillator :D
[11:16:43] <enleth> to at least avoid working the transistor in the linear mode?
[11:16:45] <pcw_home> yes
[11:16:53] <SpeedEvil> But even without it being in the linear region, without any hysterisis, it will oscillate violently
[11:17:02] <jesseg> pcw_home, modern mosfets are designed to generate massive amounts of heat.
[11:17:15] <pcw_home> please look up safe operating area of your selected transistor before you say more
[11:17:33] <jesseg> SpeedEvil, it doesn't need to.. with the soft gain of a mosfet gate and a zener diode, it shuold not oscillate
[11:17:51] <pcw_home> but it _WILL_ die
[11:18:08] <enleth> pcw_home: so it looks like at that kind of voltage and power levels, I need a slightly smarter controller for the mosfet
[11:18:12] <jesseg> enleth, yeah by using a hysteresis topology you can use a smaller mosfet and a bigger resistor :D
[11:18:14] <SpeedEvil> jesseg: SOA matters - nearly all FETs have a relatively small dissipation compared to their maximum wattage when not turned on hard
[11:18:43] <pcw_home> again lookup SOA you cannot make an effective brake with just a t5ansistor as load
[11:18:53] <SpeedEvil> But literally any comparator, a gate driver, perhaps three resistors, a FET, and a large resistor will just about do it.
[11:19:18] <SpeedEvil> pcw_home: sure you can. It'll be moderately expensive, as you'll need a lot of transistor.
[11:19:49] <SpeedEvil> And you should almost certainly not in this case as a resistor is enormously cheaper and less prone to fuckups and oscillation
[11:19:55] <enleth> obviously I'm not going to run it without any resistors in series, they're cheap
[11:20:00] <jesseg> SpeedEvil, lol true. But, let's say a mosfet has a continuous rated dissipation of 100 watts each. It can probably switch a 15KW load, but that's besides the point. He only needs to dissipate a few hundred watts, and only briefly..
[11:20:02] <pcw_home> Not really, this brake may need 200V 30A
[11:20:12] <pcw_home> find that SOA please
[11:20:22] <CaptHindsight> let them try, some learn more by doing it the hard way vs asking and listening
[11:20:45] <Jymmm> ...and a fire extinguisher
[11:20:51] <Jymmm> and marshmellows!
[11:21:06] <jesseg> enleth, how many watts do you need to sink...?
[11:21:41] <Jymmm> Chestnuts roasting over an open mosfet....
[11:23:36] <jesseg> enleth, the ballance is that the series resistors must be able under *all* circumstances to handly *all* of the maximum ever possible current at the correct voltage
[11:24:07] <enleth> jesseg: well, if my math isn't completely fubar, my mill is probably going to be able to store up to 6j of kinetic energy when jogging two axes at full speed with some heavy stuff bolted to the table
[11:24:21] <enleth> jesseg: now it's a matter of how fast I'd like it to stop during an active e-stop
[11:24:34] <archivist> I have seen an underrated brake resister let the smoke out
[11:24:53] <jesseg> enleth, how big of a mill is this?
[11:25:42] <enleth> jesseg: Bridgeport Series 1 CNC/MDI, about twice the mass of a regular Bridgeport
[11:26:08] <jesseg> so 6 watts for a second, or 60 watts for .1 seconds, or 600 watts in .01 seconds.. oh wait, it won't stop in .01 seconds LOL
[11:26:18] <jesseg> enleth, okay, what's your maximum feedrate?
[11:27:07] <enleth> factory jog speed was 5m/min, I can probably up that a little bit safely but not by much; the motors could in theory run it all the way up to 7.75m/min
[11:27:32] <enleth> but there's no reason to, 5m/min is plenty enough for a 450x290mm working area
[11:27:38] <SpeedEvil> http://www.digikey.com/product-detail/en/ixys/IXFB210N30P3/IXFB210N30P3-ND/4321671 * 100 or so to fit the SOA (yes, that's stupid)
[11:28:07] <pcw_home> you probably have a few Joules in the armature inductance as well and more than that in the rotary inertia
[11:28:24] <jesseg> 8 meters a minute tops? so most of the stored energy will be in the rotary motion of the motors
[11:28:53] <jesseg> the speed of the table isn't going to be able to transfer much energy to the motors
[11:29:22] <enleth> back of the envelope math gave me about 6j, but I can't even remember that math at the moment, might have been wrong
[11:29:27] <SpeedEvil> (you would need to drive each gate seperately)
[11:30:22] <jesseg> SpeedEvil, why have to drive each gate separately?
[11:30:52] <SpeedEvil> jesseg: because the gate voltages required to turn on the FET to 0.3A (to keep in the safe operating area) will vary per FET)
[11:31:03] <pcw_home> did you consider the armature inductance at peak current
[11:34:40] <jesseg> SpeedEvil, those IGBTs are rated at dissipating 1890 watts each. And it's even rated at being able to take 4J of unclamped inductive switching / avalanche..
[11:35:32] <jesseg> pcw_home, would armature inductance at peak current be in the opposite polarity?
[11:36:06] <pcw_home> The point is that a $2.00 MOSFET will do the job (say 20A) _IF_ its hard switched
[11:36:40] <enleth> what I know for sure is that buying a bag of 100W resistors and bolting them to a huge ass heatsink is not a problem; buying a huge ass mosfet is not a problem as well; driving the thing so that it doesn't let the servo drives fry, doesn't short the power supply, and doesn't go up in flames is a problem
[11:36:43] <jesseg> Even if the mill came to a standstill in 0.01 seconds, that's only 600W over that time period, and it probably takes longer
[11:37:33] <pcw_home> but even that $20 MOSFET cant handle that
[11:37:34] <SpeedEvil> pcw_home: quite.
[11:37:46] <pcw_home> (in linear mode)
[11:37:52] <SpeedEvil> pcw_home: though I did get it down to only $100 in FETs before I got bored. But it can be done in linear mode
[11:38:11] <jesseg> enleth, well either way would work. The circuitry for the linear mode is much simpler, but needs heavier duty fets. The hysteresis mode is more complex - you need a comparitor with hysteresis and a good mosfet gate driver, and a power supply for all that since it can't run off 200v
[11:38:13] <pcw_home> which is why brake circuits are always hard swithed
[11:38:41] <pcw_home> it can all run of 200V (I have such a device)
[11:38:42] <SpeedEvil> http://www.digikey.com/product-detail/en/ixys/IXTA3N120TRL/IXTA3N120TR-ND/1544286 can deal with 1A@200V
[11:39:27] <SpeedEvil> Sorry - I'm a bit nitpicky today.
[11:39:41] <pcw_home> think about how much current you need to drive you motors to get up to full speed in .1 second
[11:39:49] <enleth> pcw_home: what's that device made of exactly?
[11:40:37] <SpeedEvil> a tiny zener and resistor would work just fine. But practically, everything will have control circuitry power
[11:41:22] <pcw_home> low power comparator gate driver MOSFET
[11:41:23] <pcw_home> power supply is PNP current source into TL431 shunt for +12
[11:41:58] <pcw_home> 2 mA current source
[11:43:27] <jesseg> SpeedEvil, so if the 3A 1200V fet can handle 1A at 200V, that's 200W, which is its rated Pd. Why could not the 1800W igbt handle 9A at 200v? A few of those, plus some resistors that would max out at 50A or 100A could work nicely.
[11:44:05] <pcw_home> IGBTs have secondary breakdown
[11:44:06] <jesseg> pcw_home, 2mA may not be enough to drive the gates on some big fets. Each time it switches, it draws a surge of power.
[11:44:23] <jesseg> pcw_home, so what's the max power at 200V on those IGBTs?
[11:44:34] <pcw_home> 20A
[11:45:05] <jesseg> pcw_home, no.... no...
[11:45:17] <pcw_home> (MOSFETS for lower power dissipation (and a $2.00 MOSFET at that)
[11:45:41] <jesseg> pcw_home, maximum power only allows 9 amps at 200v on the 1800W IGBT...
[11:45:52] <SpeedEvil> pcw_home: they don't have secondary breakdown.
[11:45:54] <jesseg> so 20A is not a problem
[11:45:57] <SpeedEvil> But it acts somewhat like that.
[11:46:17] <SpeedEvil> IT's got variable Vgs(th) over the chip, that means that turning it on partially hotspots an area of the chip
[11:46:23] <pcw_home> right transistors make expensive and unreliable resistors
[11:46:47] <pcw_home> (when you get into high powers)
[11:47:08] <SpeedEvil> jesseg: go to the datasheet and look at the 'safe operating area' graph. It doesn't even list any current flowing being acceptable with 200V Vds
[11:49:03] <jesseg> SpeedEvil, ahh OK.. wow..
[11:49:40] <jesseg> SpeedEvil, actually, the cutoff is, I think, at 300v, which is the absolute max voltage for the part.
[11:49:44] <SpeedEvil> This is because the current doesn't flow evenly over the die, as the gate voltage to turn it on varies, and bad stuff happens if you try
[11:49:54] <jesseg> but at the 200v line, you sure cant' do much current for very long.
[11:49:57] <SpeedEvil> jesseg: look at the bottom line
[11:50:02] <enleth> pcw_home: interestingly, the application notes for TL431 and equivalents all seem to provide examples for overvoltage protection within the device's "native" voltage range of up to 36V. is the circuit significantly different for monitoring much higher voltages?
[11:50:04] <SpeedEvil> yeah - that's closest to 'dc
[11:50:23] <SpeedEvil> enleth: no, you just need a 1mA or so 12V or whatever supply
[11:50:38] <pcw_home> and 2 ma is fine (because you dont switch at more than 20 Hz or so basically you have a relaxation oscillator with the power supply output capacitance)
[11:50:39] <SpeedEvil> enleth: this can be a 12V zener diode, and a 200K resistor.
[11:50:46] <SpeedEvil> (and a cap)
[11:51:12] <pcw_home> I used a 431 because I wanted better accuracy than a Zener
[11:52:10] <jesseg> SpeedEvil, so it looks like that IGBT can do 200A at 300V but only for 25uS. Obviously much more suited to SMPS :D
[11:52:23] <pcw_home> its just a shunt 12V supply but in my circuit is also the threshold reference
[11:52:37] <SpeedEvil> I have a related device I built from a 555 and a FET
[11:52:55] <SpeedEvil> On voltage going over setpoint (measured by the 555) it turns on the FET for 1ms
[11:53:05] <jesseg> SpeedEvil, that's pretty clever, built in hysteresis and everything
[11:53:08] <SpeedEvil> (for use as a thermal load dump for solar panels + batteries)
[11:56:15] <enleth> OK, looks like I'll have to take a closer look at that regulator and ask a friend who's way more comfortable with power circuits for some help
[11:58:08] <enleth> but at least I seem to be going roughly in the right direction with that
[11:59:05] <jesseg> pcw_home, SpeedEvil wow you guys are right.. semiconductors aint no good for high voltage linear operation...
[11:59:37] <SpeedEvil> They often sort-of-work at a fraction of their maximum operating voltage
[12:00:33] <jesseg> enleth, looks like the oscillating hysteresis type is definitely the way to go.. Just pick resistors that are a low enough resistance to always always clamp the maximum current needed so they don't get over run.
[12:01:30] <enleth> jesseg: that I can understand perfectly. as I said, buying a bag of 2R 100W resistors is the last of my worries
[12:02:35] <enleth> 2R or something slightly above that; whatever really as long as I can arrange a series-parallel network of them that matches
[12:04:20] <jesseg> enleth, what hysteresis voltage do you want?
[12:04:27] <pcw_home> This is not just theoretical, I did destroy quite a few _LARGE_ transistors learning
[12:04:29] <pcw_home> about SOA when building a variable load for a dynamometer, the lesson stuck
[12:04:43] <enleth> jesseg: hell if I know to be honest
[12:04:44] <jesseg> pcw_home, no kiddin' :D
[12:05:42] * JT-Shop can see pcw with that mad scientist look on his face after blowing stuff up
[12:05:50] <enleth> pcw_home: actually, you don't happen to sell those braking controllers, do you?
[12:09:15] <enleth> jesseg: it's a question of efficiency versus safety margins, isn't it?
[12:10:13] <enleth> jesseg: the higher I switch the resistor on, the more energy I can store in the capacitors instead of turning it into heat, but that gets me slimmer safety margins for the servo drive
[12:10:14] <jesseg> enleth, hmmm, I don't see how efficiency plays into it really. You just don't ever want the shunt kicking in or being on at a voltage below the output of your power supply.
[12:10:46] <jesseg> enleth, well, the shunt is never going to activate hardly except at full speed estop
[12:10:54] <gregcnc> How much power are you expecting to dump?
[12:11:05] <jesseg> in which case x quantity of power gets turned to heat
[12:11:13] <jesseg> gregcnc, he guesses 6watt seconds
[12:11:50] <jesseg> enleth, what's your power supply gonna be putting out?
[12:12:09] <enleth> jesseg: about 140-150V
[12:12:23] <CaptHindsight> how many Joules is that? :)
[12:12:37] <jesseg> CaptHindsight, lol :D you're one for one :P
[12:13:04] <jesseg> enleth, okay, so I'd say the shunt should latch on at 180, and release at 170
[12:13:34] <jesseg> actually, I'd go with latch at 170 and release at 160..
[12:13:48] <jesseg> better to come close to shunting the power supply than over voltaging the system
[12:14:25] <enleth> jesseg: FWIW, the motors' "maximum terminal voltage" spec says 140V, which conicides neatly with the maximum rated speed of 3100rpm and Kv of 44V/1000rpm
[12:14:41] <jesseg> enleth, haha cool
[12:14:52] <gregcnc> doesn't matter
[12:19:02] <enleth> jesseg: the supply is actually a series set of 3 48V 50A telecom SMPS supplies
[12:20:16] <jesseg> enleth, oh cool. You might consider putting 100A schottky diodes backwards across each power supply in case one of them goes into overcurrent or overvoltage shutdown it won't have the reverse voltage of the other two across its output
[12:20:40] <enleth> they have integrated output contactors that open on fault
[12:21:18] <jesseg> enleth, oh OK so no worries there then
[12:21:20] <enleth> also, each of those has almost 15mF of output capacitance, so the burst current capacity is going to be even higher
[12:22:08] <enleth> *and* I'm putting another 15-20mF at 300V on the DC bus by the servo drives
[12:22:10] <SpeedEvil> https://www.youtube.com/watch?v=glf_k4qGBAA all the axis!
[12:22:31] <SpeedEvil> (1200hp 40cm diameter aluminium torque converter)
[12:22:41] <jesseg> enleth, I'll be glad to help you figure out a nice hysteresis clamping circuit if you like.. I'll probably want to make one for my newly acquired bridgeport clone when I convert it to CNC :D
[12:23:18] <jesseg> SpeedEvil, hahahaha...
[12:24:07] <IchGucksLive> Hi
[12:24:11] <jesseg> howdy IchGucksLive
[12:24:22] <enleth> jesseg: OK, I'll be sure to let you know when I get around to do that; for now, I'll be testing with a single supply connected, limiting the motor speed to a tad over 1000rpm, so the DC bus capacitance should be able to sink anything they give back with no braking resistor
[12:25:16] <jesseg> enleth, sounds like fun!
[12:25:50] <enleth> fun fact is, the supplies are the most expendable part of the whole thing
[12:26:25] <enleth> I got them for $40 each, there's about 130 more of them where they came from and they're not going to be sold out anytime soon
[12:27:04] <enleth> I got one dud in a batch of 4 and I wasn't even upset about that
[12:28:36] <gregcnc> http://www.a-m-c.com/download/datasheet/srst175.pdf very simple
[12:29:27] <gregcnc> I have one here, but the fets are firmly glued to the heatsink so I can't see what components are used
[12:29:40] <gregcnc> http://www.ebay.com/itm//131828584600
[12:30:28] <enleth> heh, $55 is more than I paid for 4 servo drives
[12:31:08] <enleth> but I was quite lucky, they don't usually run so cheap
[12:32:07] <enleth> and I had a friend in the US at the time who collected them and shipped in his luggage, otherwise the shipping cost would be serveral times that
[12:34:19] <gregcnc> shipping anything these days is expensive
[12:34:34] <CaptHindsight> The Grand Tour premiered yesterday, any one see it yet?
[12:37:57] <jesseg> gregcnc, enleth hmmm, I see they have a fuse.. Not a bad idea, but I think I'd want to wire it so if the fuse blows, it'll disconnect from the power supply, not disconnect the shunt LOL
[12:44:20] <Jymmm> .22lr make EXCELLENT fuses.... once.
[12:45:29] <pcw_home> indicating fuses no less
[12:47:12] <Jymmm> .22lr fuse... http://www.discovery.com/tv-shows/mythbusters/videos/gun-cartridge-fuse-minimyth/
[13:24:46] <jesseg> Jymmm, pcw_home hahaha "You know it when you blow it" (22lr fuses)
[13:26:06] <jesseg> But I'm surprised it goes so quickly.... Ohms law seems to indicate that the heating in the brass will be minimal at 10A, and so should take several second to reach the flashpoint...
[13:26:18] <jesseg> maybe the rim was what was contacting the fuse holder
[13:26:21] <jesseg> Howdy Nick-Shop
[13:27:06] <IchGucksLive> Gn8
[13:32:22] <jesseg> Nick-Shop, so you were right, my newly purchased mill does have a kickout pin for the power quill feed UP direction, but it's broken and doesn't kick out the power feed... which explains why it snapped a tooth on the worm's gear..
[13:32:48] <jesseg> hey guys do you ever oil the spindle spline on your bridgeport style mills?
[13:43:31] <Nick-Shop> Oil the slot you see for the quill and there should be an oil cup in front-enough oil gets to the rach in back. Lower the spindle about 2" and put some oil down the top opening with the spindle running 200 rmp
[13:44:07] <Nick-Shop> be back - got to tend a machine in the shop
[13:45:39] <gregcnc> https://youtu.be/y9pknU0zv9c?t=1m57s
[13:49:36] <Jymmm> jesseg: could be the cap or gunpowder igniting
[13:54:12] <MacGalempsy> hello hello hello
[14:00:33] <MacGalempsy> trying to PID tune the 4th axis, but it runs but I cannot f-error to oscillate, it only keeps climbing. it doesnt have a steep acceloration,
[14:08:01] <Duc> wish I could help. I got mine somewhat tuned but still needs adjusting
[14:11:30] <rene-dev> pcw_home Hi, we are debating on how the spindle output on the 7i76 works... is that just pwm over opto?
[14:12:26] <pcw_home> Yes just 5 KHz PWM to OPTO -->CMOS gate --> rail-rail OPAMP
[14:13:23] <rene-dev> ah... the opamp just gets the voltage from spindle+ and spindle-?
[14:13:30] <pcw_home> 5 KHz was about optimum for the OPTO (< 1 % non linearity and still reasonably fast with 2 pole filer)
[14:13:39] <pcw_home> yes
[14:14:14] <rene-dev> ok, so the vfd does not see the pwm
[14:14:33] <pcw_home> its is limited to ~15V as rail-rail OPAMPs dont go much higher
[14:15:02] <pcw_home> basically a potentiometer replacement
[14:15:33] <sync> hm, I wonder if you really need an op, probably depends on the vfd
[14:18:11] <pcw_home> If you want good linearity it helps, especially if the VFD has less than 100K or so input impedance
[14:19:05] <pcw_home> but you could just make a low impedance filter on the output of the CMOS gate
[14:21:12] <Duc> pcw_home: have you been able to use a pot to adjust the jog speed on axis gui?
[14:22:24] <pcw_home> I have not tried
[14:23:06] <Duc> dang I tied the signal into the jog-speed variable but unable to get the slider to change or the speed to adjust
[14:24:03] <pcw_home> Need a "Axis"/linuxCNC GUI guru
[14:24:11] <Duc> just one of those side projects to make it act like a power feed on a manual mill
[14:24:56] <Duc> Ill have to wait till andypugh in on IRC to ask some more questions
[14:25:33] <pcw_home> MacGalempsy: I cant parse "I cannot f-error to oscillate"
[14:31:37] <Duc> I think he means it keeps growing in f-error instead trying to settle down to correct position
[14:32:38] <pcw_home> maybe feedback backwards or not working
[14:33:54] <Duc> guessing encoder direction is backwards or motor direction is backwards
[14:34:02] <Duc> from past experience
[14:36:48] <JT-Shop> hmm 48 T8 4' bulbs only draw as much as 12 100w bulbs and put out 132,000 lumens
[14:37:07] <JT-Shop> compared to the 12 100w bulbs which put out 19,000 lumens
[14:37:21] <Duc> look up T5 bulbs also
[14:37:32] <JT-Shop> to expensive
[14:37:36] <JT-Shop> too even
[14:38:17] <Duc> very freaking bright and Ive heard good thing about the cosco LED lights
[14:39:47] <JT-Shop> I got 20 4 bulb fixtures for $20 each, T8 ballasts for $7 and bulbs for $3 so $39 per fixture
[14:39:59] <JT-Shop> fancy ones from a bank...
[14:41:19] <Duc> nice so alot of lighting for a shop
[14:45:11] <JT-Shop> yea, 2 more to put up and I'm almost done... I have to find 2 surface mounts low profiles for over the garage door
[14:45:48] <tiwake> one of these days I'm going to get around to building my own house... and that will include a proper DC power supply for the lighting
[14:45:53] <JT-Shop> actually 3 were T8 and had two ballasts in each one so I got 6 T8 ballasts with the fixtures
[14:46:03] <Duc> I need to buy some new bulbs for my T8 lights and still install 2 more fixtures that I got from a factory we moved
[14:50:10] <Duc> anyone have a good recommendation for a inserted 3/4 end mill
[14:51:16] <MacGalempsy> pcw_home: the curve would just climb, but after turning up the max output, it started to work better. back in here to run some calcs and see what happens next
[14:51:39] <tiwake> Duc: maritool makes good stuff
[14:52:53] <Duc> tiwake: I have to see if I can find it on ebay. I would like to avoid shar but still buy a nice tool for a good price
[14:53:43] <tiwake> Duc: https://www.maritool.com/Indexable-Tooling-Indexable-Cutters-With-Shanks/c50_352/p14954/Indexable-Chamfer-Cutter-45Deg-2-Flute-.750-Shank/product_info.html
[14:55:41] <Duc> tiwake: only degree cutters come with shanks from them. looking for a square edge. but I do need a good 45 degree cutter which they have
[14:56:15] <tiwake> Duc: https://www.maritool.com/Indexable-Tooling-90%C2%B0-Rect.-Insert-Shell-Mill/c50_112/p667/Shell-Mill-90-Deg-X-2.0-dia-X-Rectangle/product_info.html
[14:56:18] <tiwake> 2" though
[14:56:58] <tiwake> normally I don't get 3/4" endmills
[14:57:23] <tiwake> unless its a big roughing endmill
[14:58:21] <Duc> right now I have a 2 different types of 2" shell mill but 3/4 end mills are nice for cleaning up material and pockets
[14:58:43] <tiwake> why not just use 1/2" carbide endmills?
[14:59:13] <Duc> cost. makes you wanna cry when you chip a carbide endmill. I would even like to find a inserted 1/2 end mill
[15:00:52] <tiwake> $30 is too much?
[15:01:02] <tiwake> you spend that much just on inserts
[15:01:23] <Duc> guess ive only looked at cost for 3/4 carbide endmills
[15:01:28] <Duc> thats not bad
[15:01:28] <tiwake> $15/insert
[15:01:33] <tiwake> https://www.maritool.com/Cutting-Tools-End-Mills-Finishers-Square-End-4-Flute-Square-TiAlN-4-fl.-sqr-end-TiAlN-coated/c78_79_80_387_81/p387/.500-dia-4-flute-sqr-TIALN-carbide-finisher-1.0-loc/product_info.html
[15:01:47] <tiwake> yeah, 3/4" endmills are expensive
[15:01:48] <tiwake> heh
[15:01:52] <tiwake> solid carbide
[15:02:05] <Duc> yea like 300+
[15:02:10] <tiwake> but 1/2" carbide endmills are so common
[15:02:37] <tiwake> https://www.maritool.com/Cutting-Tools-End-Mills-Finishers-Square-End-4-Flute-Square-TiAlN-4-fl.-sqr-end-TiAlN-coated/c78_79_80_387_81/p396/.750-dia-4-flute-sqr-TIALN-carbide-finisher-1.50-loc/product_info.html
[15:02:41] <tiwake> $75
[15:03:42] <tiwake> I just generally use 1/2" carbide endmills though, and larger stuff when needed use insert stuff
[15:04:51] <Duc> I just need to stop cutting tool steels at home for projects and go back to mild steel lol
[15:04:59] <sync> you can just run hss pm
[15:05:15] <sync> or uncoated hss for $20 a pop or so
[15:05:17] <tiwake> Duc: A1 tool steel? or harder stuff?
[15:06:03] <tiwake> cause you can get partially hardened 4142 steel and that stuff is pretty badass while still quite machinable
[15:06:06] <Duc> alot of 4140 PH, S7, A2, D2
[15:06:24] <Duc> none harden S7, A2 and D2 I mean
[15:06:35] <tiwake> hmm
[15:06:47] <sync> pre hard tool steel is pretty nice
[15:06:50] <sync> machines nicely
[15:06:52] <tiwake> not sure if I've made anything out of A2
[15:07:06] <tiwake> maybe once
[15:07:36] <Duc> sync: not sure my bridgeport could handle that stuff without breaking tools
[15:08:07] <tiwake> yeah, you want carbide for 4142 and the better stuff
[15:08:36] <tiwake> high speed steel is pretty flimsy
[15:08:51] <Duc> I usually buy cobalt drill bits since regular bits sucks in those materials
[15:09:04] <tiwake> jep
[15:09:12] <sync> Duc: it will have no problems
[15:09:49] <tiwake> I always buy cobalt drills these days... screw high speed steel
[15:10:05] <tiwake> last a lot longer for normal stuff
[15:10:31] <tiwake> though cobalt is a type of high speed steel from what I understand
[15:10:32] <tiwake> heh
[15:10:59] <Duc> sync: you mean regular drill bits in 4140 PH?
[15:11:19] <Duc> I do have a nice DAREX SP2500 drill bit sharpener
[15:11:29] <tiwake> ohhh darex
[15:11:30] <sync> nah, you want carbide but pre hard machines very nice
[15:11:50] <tiwake> I'm rather envious of your darex
[15:11:54] <tiwake> :P
[15:12:02] <Duc> I wont even touch 4140 in annealed state anymore.
[15:12:18] <Duc> tiwake: it was a item that was no longer needed at a plant
[15:12:56] <tiwake> I should make stirfry
[15:13:03] <tiwake> havent eaten today yet
[15:13:39] <Duc> I need to buy a dam machinist box to organize my tools
[15:13:53] <tiwake> I got one of those recently
[15:14:05] <tiwake> and some tools to go in it
[15:14:13] <Duc> normally craigslist is full of them but its bare right now
[15:15:52] <tiwake> alright, stir fry making time
[15:22:22] <jesseg> Nick-Shop, thanks! yeah I don't think previous owners *ever* oiled the spline or rack.. it wasn't visible and it wasn't plumbed to the hand pump oiler LOL
[15:22:49] <jesseg> but the spline grabs when you go to raise or lower the quill :P.. bug beggers and choosers and all :D
[15:39:24] <Duc> http://huntsville.craigslist.org/tls/5884068294.html
[15:39:30] <Duc> so want for storage in the yard
[16:04:29] <SpeedEvil> Plus, it's four dimensional, which is nice
[16:05:27] <SpeedEvil> 3/8" steel?
[16:11:16] <Nick-Shop> <jessseg> All the oiling steps I mentioned is with a hand held oil pump - the old fashioned way :-)
[16:13:16] <Nick-Shop> the quill rack isn't visible -the oil wicks around the quill and it will get there - don't need much
[16:13:56] <tiwake> guiz
[16:14:20] <tiwake> did I tell you how really yummy this stir fry is that I just finished making?
[16:22:25] <jesseg> Nick-Shop, haha yup that's how my little shoptask toy oils itself.. I have a little oil pump bottle and I just go squirting it around once in a while :P
[16:24:14] <DaViruz> there don't happen to be a way to make the linuxcnc startup error dump be a little less verbose?
[16:25:29] <Deejay> gn8
[16:31:42] <JT-Shop> DaViruz: http://linuxcnc.org/docs/2.7/html/config/ini-config.html#_emc_section
[17:30:18] <nubcake> n8
[17:30:53] <Loetmichel> *meh* Chinese quality isnt what it once was... (if ever)... just had to repair the third 10port usb2 hub... all the same MOF: dropping from the desk. ripping the mico-usb-socket off the PCB. Including the traces... and my eys were once better to solder wires to those 2 mil traces :-(
[17:31:43] <DaViruz> microusb feels very fragile
[17:49:41] <DaViruz> JT-Shop: not exactly what i meant, i mean the error window that pops up if there is a error in the hal configuration for instance
[17:50:10] <SpeedEvil> Loetmichel: duct taping cables to stuff can enormously help
[17:50:52] <Loetmichel> i now have hotgluied the hub to the desk ;)
[17:50:55] <Loetmichel> -i
[18:13:22] <JT-Shop> DaViruz: I'm guessing not
[18:18:18] <Frank_6> hi guys
[18:18:33] <JT-Shop> Frank_6: hi
[18:20:06] <Frank_6> i've started reading the manual to learn as much as i can, i will probably have to read it a few more times before it actually starts making sense but its fun so far
[18:20:50] <JT-Shop> yea, the more you learn the more you know you don't know lol
[18:21:13] <Duc> sometimes hands on is easier to learn
[18:21:35] * JT-Shop waits for the theme song for Flash to finish before going inside
[18:22:19] <JT-Shop> the hardest part is knowing where to look in the manual for the info you need at the moment
[18:22:43] <JT-Shop> well I'll wait for FM by Steely Dan to play then go inside
[18:22:47] <Frank_6> i have linuxcnc with the 5i25 and 7i76 installed, if im not mistaken i can make simulations to learn some more right?
[18:23:04] <Frank_6> would you recommend printing the manual?
[18:24:02] <Jymmm> Frank_6: Do you have a tablet by chance?
[18:24:11] <JT-Shop> Gene likes to print it, it's really up to what is easier to read for you...
[18:24:16] <Frank_6> nope,
[18:24:39] <Jymmm> Frank_6: Maybe spend the money on a nice sized tablet, then view it on there instead of printing
[18:24:41] <JT-Shop> now that everything is in the Documents you can search the pdf
[18:24:53] <JT-Shop> cheaper to print lol
[18:24:54] <Duc> and have a way to search the forum
[18:25:04] <Frank_6> well reading from the pc its more interactive for me, as im used to use it to read stuff all the time, not particularly books thou
[18:25:05] <Jymmm> JT-Shop: tablets are cheaper everyday
[18:25:18] <Jymmm> and JSUT as a reader, probably even cheaper yet
[18:25:28] <Duc> a good laptop is 75 dollars on ebay
[18:25:31] <JT-Shop> Ctrl f is your friend then
[18:25:42] <Frank_6> im kinda broke right now, the cncrouter to blame. i will do when the machine starts spitting some $$$$
[18:26:02] <Frank_6> ctrl f is my BEST friend
[18:26:03] <Frank_6> lol
[18:26:10] <JT-Shop> I made a machine to spit $$$ but was afraid to get caught
[18:26:16] <Frank_6> hehehhee
[18:26:25] <Duc> what did you use for the stepper drivers?
[18:26:57] <Frank_6> they are bottom line panasonic servo drives with step dir signals
[18:27:28] <JT-Shop> say goodnight Gracie
[18:27:47] <Duc> pfconfig works well or just using another persons config file as a baseline
[18:27:58] <Frank_6> funny thing, a year ago i wouldnt have understood 1 word from my last sentence
[18:29:04] <Duc> just remember to back your config files up
[18:30:26] <Frank_6> aaaand back to beeing ignorant, whats pfconfig :D=
[18:30:28] <Frank_6> ?
[18:32:09] <Duc> sets up mesa config instead of writing the file by hand
[18:32:33] <BeachBumPete> evening folks :)
[18:32:45] <Frank_6> hi!
[18:32:49] <Tom_L> hey pete
[18:33:09] <BeachBumPete> been working on the VMC today
[18:33:22] <BeachBumPete> I think I got the cable chain modifications completed.
[18:33:28] <DaViruz> Duc: pncconf?
[18:33:51] <Tom_L> BeachBumPete, you were moving the control or something weren't you?
[18:33:57] <Duc> DaViruz: yea mispelled it LOL
[18:34:59] <BeachBumPete> Tom_L well in preparation for the big move down here I chose to relocate the entire electronics cabinet which used to sit above the large power transformer that is no longer needed
[18:35:36] <BeachBumPete> I removed and sold off that transformer and removed the large steel box it occupied all of which was located underneath the large electronics cabinet
[18:36:02] <BeachBumPete> this allowed me room to physically lower the cabinet down to just above the leveling pod feet.
[18:36:30] <BeachBumPete> which basically makes the entire machine able to fit thru a standard garage door once you remove the Z motor from the ballscrew
[18:36:47] <BeachBumPete> it actually clears with several inches to spare now
[18:36:51] <Duc> dam
[18:37:00] <Duc> did you get the lathe working yet
[18:37:14] <BeachBumPete> have not done anything to the lathe since moving it here
[18:38:32] <BeachBumPete> so now that all of the wiring affected has been adjusted carefully I am ready to hook up main power now. Working on that tonight/this weekend.
[18:39:25] <Tom_L> oh you got your pannel wired up?
[18:39:37] <BeachBumPete> working on it
[18:40:06] <BeachBumPete> right now the machine electronically speaking is back to the place it was before I dismantled it for the move I believe
[18:41:16] <Duc> I had a chance for a free Aroloc CNC mill but had to pass on the deal since its a weird mill
[18:41:35] <BeachBumPete> I almost bought an acroloc but they do have a strange tooling situation
[18:42:38] <Duc> yea would be more trouble in the end
[18:43:14] <BeachBumPete> the great thing is that there are so many different nice VMc's available now for low prices
[18:44:07] <Duc> yep looking at houses now with shops before I buy one
[20:14:56] <Duc> pretty dead in here tonight
[20:16:55] <BeachBumPete> watchin the new independence day ;)
[20:17:13] <jdh> sitting in a cheap florida motel room
[20:17:54] <Duc> neither one sounds that good
[20:18:06] <Duc> independence day I had alot of hope for
[20:18:34] <jdh> went diving in the morning, biking in the afternoon. too tired to care about the room.
[20:19:45] <Duc> I need to pick up my bunny ears to warm up the garage
[22:06:36] <Duc> pcw_home: for rigid tapping I see the encoder.xx.index-enable pin needs to be tied to motion.spindle-index-enable. I do not see mine changing but the encoder.xx.input.index pin does change states. This is a 7i77 with diff encoder
[22:17:08] <Duc> pcw_home:never mind figured out my mistake. couldnt catch it in the show hal configure but in oscope