#linuxcnc | Logs for 2012-10-10

[01:54:31] <Loetmichel> mornin'
[02:14:16] <DJ9DJ> good morning
[07:23:48] <r00t4rd3d> -_o
[07:36:47] <jerryjj> I am trying to use stepconf to enter the correct timings for my steppers. Is there a limit on the step time? If I enter anything over 5000 (even 5001) the steppers just make high frequency noise.
[07:38:40] <cpresser> jerryjj: maybe this helps: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Stepper_Drive_Timing
[07:39:55] <cpresser> there is lots of info on steppers in the wiki
[07:39:59] <r00t4rd3d> jerryjj, what controller are you using?
[07:40:45] <jerryjj> OK, from that list I can see that a few drivers use longer step times.
[07:41:51] <jerryjj> I am using drivers that I made from an attiny85. They work great using GRBL, but I am using about a 10ms step time with that...
[07:44:34] <jerryjj> I can get them to run at 5000, but I can tell from how they sound that it isn't right. They are missing steps even at a very slow speed.
[07:45:43] <jdh> do you have an adequate pulse width?
[07:45:47] <cpresser> hook up a scope :)
[07:45:57] <r00t4rd3d> if your acceleration and velocity is set to high you will get weird noises too
[07:46:50] <r00t4rd3d> and i imagine with that setup those numbers should be pretty low
[07:47:33] <jdh> 10ms steps?
[07:47:46] <r00t4rd3d> "using GRBL"
[07:48:01] <jdh> does that require a paper towel tube?
[07:48:03] <jdh> nevermind.
[07:48:16] <r00t4rd3d> ha
[07:48:28] <jerryjj> Yep. I'm fairly sure the step time needs to increase just a bit more to work reliably, but as I said, when I enter 5001 or more they cease to function even at .1mm/s
[07:51:02] <jerryjj> Sorry, that was uS, not mS...
[07:54:06] <cpresser> jerryjj: that might be some weird bug. thats why i would try to check the waveform with a scope
[08:40:13] <jerryjj> It is a bug... the test in stepconf doesn't work, but if I save it and open axis, they work just fine.
[10:04:33] <archivist> anyone have an old starrett catalog with the No 2D 1 inch disc in it trying to find it's accuracy specification and their website sucks
[10:22:39] <r00t4rd3d> archivist are you ArcEye on the forums?
[10:23:03] <archivist> no, I never post on the forum
[10:23:18] <r00t4rd3d> why not?
[10:23:48] <archivist> I rather hate forums because such a lot of bad advice gets left around
[10:25:11] <archivist> and most are so slow due to added adverts and poor design
[10:26:22] <archivist> but for slow see what you can count up to while you wait on http://www.starrett.com
[10:26:23] <pcw_home> No adverts on the LinuxCNC forum
[10:27:13] <jdh> not me
[10:32:07] <r00t4rd3d> http://i.imgur.com/UsW5X.jpg
[10:34:05] <r00t4rd3d> i could live in that
[10:34:15] <tjb1> Morning fellas
[10:34:26] <jdh> where would you put the bridgeport?
[10:34:26] <r00t4rd3d> aww fuck, he is here...
[10:34:35] <tjb1> :(
[10:34:39] <r00t4rd3d> :D
[10:35:09] <syyl> no bridgeport, but a deckel fp1 could fit
[10:35:19] <r00t4rd3d> my router would fit
[10:35:25] <r00t4rd3d> on the kitchen table
[10:35:33] <syyl> it would be the kitchen table
[10:35:43] <syyl> perfect to slice pizza
[10:35:56] <syyl> "what feed do you run on pizza?"
[10:36:11] <r00t4rd3d> i wanted to hook a frosting pump upto my router and do cakes
[10:36:18] <FinboySlick> r00t4rd3d: From remembering riding in those, I hope they fixed the suspension because these things are bouncy as heck... Better not leave dishes in the cupboards.
[10:36:42] <tjb1> Free bandsaw blade - http://info.starrett.com/get-your-free-primalloy-blades?utm_campaign=Banner&utm_source=starrett.com
[10:40:34] <r00t4rd3d> sweet
[10:40:38] <r00t4rd3d> ordered
[10:40:56] <r00t4rd3d> "A Starrett representative will be in contact with you shortly to complete your request for a free Primalloy band saw blade. "
[10:42:37] <r00t4rd3d> http://i.imgur.com/HGJR7.jpg
[10:42:37] <r00t4rd3d> lol
[10:44:13] <TekniQue> that looks only slightly dangerous
[10:45:32] <r00t4rd3d> carve this on your fancy lathes:
[10:45:33] <r00t4rd3d> http://i.imgur.com/h5v4V.jpg
[10:47:47] <r00t4rd3d> I wouldnt even know where to start on something like that
[10:47:54] <r00t4rd3d> good drugs probably
[10:48:09] <mutilator> start at the top
[10:52:10] <tjb1> You can buy wooden blankets...
[10:57:08] <tjb1> http://gizmodo.com/5907919/you-can-burn-this-working-wooden-blanket-for-extra-warmth-in-the-middle-of-the-night
[10:57:15] <tjb1> I wwas joking but I guess you really can...
[11:10:16] <archivist> I found a starrett catalog, the disc is missing from the index, but there is a picture as an accessory for a No 2 series micrometer
[11:24:48] <tjb1> I am going to submit a video of me sharpening a pencil with a bolt to hackaday...
[11:25:02] <tjb1> "Dont have a pencil sharpener? USE A BOLT!"
[11:26:17] <archivist> angle grinder is a little better :)
[11:26:42] <skunkworks> http://bbs.homeshopmachinist.net/threads/56202-Turn-key-setup-for-EMC
[11:26:52] <tjb1> Im just referring to the stupid stuff that gets put on hackaday :)
[12:07:18] <IchGuckLive> Hi all B)
[12:17:21] <mrsun> hmm where to get bellows etc to protect the ways of the mill ?
[12:23:15] <IchGuckLive> mrsun: how long and rubber paper or steel
[12:23:58] <mrsun> dont know :P just wanted to find a place to buy ... i want bellows that would cover the exposed ways
[12:24:16] <IchGuckLive> http://www.par-group.co.uk/rubber-polyurethane/Concertina-Bellows.aspx
[12:24:30] <IchGuckLive> like this
[12:25:15] <mrsun> ye something like that =)
[12:26:22] <archivist> or make them
[12:26:37] <mrsun> yeah tried making one but that was only paper .. but it bent out in strange and stupid ways :P
[12:26:43] <mazafaka> how tomake them?
[12:27:07] <mrsun> http://www.ixen-cnc.com/2007/10/leadscrew-cover-for-your-sherline-mill.html
[12:27:47] <IchGuckLive> i uses thin VA steel 0.3mm
[12:28:38] <IchGuckLive> make a U punch in one ege and it will work at max 3 sheed wide
[12:30:30] <archivist> you dont need the taper but http://www.cyberbeach.net/~dbardell/bellows.html
[12:31:51] <archivist> there is another fold but it is not as good as the 45 degree
[12:31:51] <IchGuckLive> it most depends on the shape that has to be sheelded
[12:33:18] <archivist> my lathe has a spring type that looks like a clock mainspring over the ballscrew
[12:33:29] <IchGuckLive> cheep drawer guide with steel also works good
[12:34:56] <archivist> http://www.valvers.com/wp-content/uploads/2012/10/drill-head-002.jpg see lower left
[12:35:03] <archivist> not mine
[12:35:35] <archivist> other type is interlinked sheet that slides
[12:38:02] <archivist> top right http://www.aaman.com/brands/gortite
[12:39:03] <archivist> go wonderfully wrong when they jam
[12:43:52] <awallin> those interlinked sheet shields in stainless are something like 800eur/pcs for large VMCs I heard...
[12:44:11] <awallin> not exactly cheap
[12:44:51] <archivist> they do look nice though
[12:44:59] <syyl> way covers are always pretty expencive
[12:45:00] <syyl> :D
[12:45:04] <pcw_home> That telescoping clock spring is cool
[12:45:14] <awallin> yeach and you can walk inside the machine and stand on them :)
[12:45:16] <syyl> x axis bellow for a deckel fp2nc, 300eur
[12:48:25] <IchGuckLive> making them yourself is not hard todo
[12:49:10] <IchGuckLive> cheep rails from your chinese man
[12:50:11] <IchGuckLive> if you got the space let it just overflow your warkroom
[12:50:20] <IchGuckLive> work B)
[12:58:08] <skunkworks> jeeze http://www.cnczone.com/forums/g-code_programing/164791-ever_wished_you_could_use.html
[13:03:07] <IchGuckLive> skunkworks: why this axis does the same
[13:03:56] <IchGuckLive> pcw_home: is there a full 5i25_7i76 linuxccn example
[13:06:36] <IchGuckLive> im stuck in mind i orderd encoder 100p/rev ABZ i want to go 1:2 Spindel endcoder
[13:06:54] <IchGuckLive> so i got 2 index per rev and 200 p/rev in real
[13:09:07] <IchGuckLive> the 2 index pulses are the problem etch resets the encoder , i need to get rid of one
[13:10:19] <IchGuckLive> so count in the index to a Var and output every 2nd to the encoder index
[13:11:36] <IchGuckLive> pcw_home: is this posible or stay with the 100pulses per Rev for treading will be ok 2
[13:20:15] <IchGuckLive> ok anwer is on wiki yes it will work on 100pulses also
[13:52:23] <archivist> if he wants two start threads!
[14:57:01] <PCW> IchGuckLive (should you read this later) 2-1 on encoder is a pain
[14:57:02] <PCW> this is because index-enable is a bidirectional signal so it hard to simply gate
[14:57:04] <PCW> (needs a HAL guru) I guess if you had a single ended encoder you could
[14:57:05] <PCW> gate the index signal electrically with a 50% on/off flag into an opto interrupter on the spindle
[14:58:26] <jdh> I love it when you talk dirty.
[14:59:20] <PCW> There's more where that came from...
[15:04:32] <tjb1> Good news, I am going to graduate on time
[15:04:42] <jdh> congrats
[15:04:46] <tjb1> :D
[15:04:50] <tjb1> Should have 3 degrees
[15:04:56] <jdh> cool.
[15:05:02] <tjb1> story bro?
[15:05:04] <jdh> I only have two
[15:05:19] <tjb1> Mine are all in the same major
[15:05:27] <jdh> I'd like another one, but not bad enough to commit that much time.
[15:05:58] <tjb1> Im just getting the 2 year and 4 year degree and some other one in my major…I didnt take any extra classes
[15:07:15] <jdh> ever get to shower with sandusky?
[15:07:19] <tjb1> I have thought about doing a conversion on a shoptask 3-1 but I dont think its worth it
[15:07:23] <tjb1> no
[15:08:03] <tjb1> Anyone in here know of a instructional or something to explain how to make a UML diagram for a class?
[15:13:48] <andypugh> Nick001-Shop: Did you see those analogue-input stepper drives?
[15:22:39] <Nick001-Shop> Yes- just haven't really had time to look at them hard. Also looked at the stepper drivers for 52 - dont know what that is in USD. Found them on an asiasite (alibaba?) for 150 usd each plus $150 to ship thep from china. Guess I'll look at the geclo's before I do that one.
[15:23:46] <Nick001-Shop> gecko's
[15:27:31] <andypugh> Well, the self-pulsing ones would basically make the steppers look like servos, and then they would hook directly to the 7i77, which seems handy for you.
[15:27:44] <andypugh> (You did say you had linear scales to close the loop?)
[15:30:46] <Jymmm> andypugh: got a moment to look at something?
[15:31:20] <andypugh> 'appen
[15:31:49] <Jymmm> andypugh: I dont know what that measn, but ok =)
[15:32:39] <Jymmm> andypugh: They have this "302/304 certified" SS, I'm not sure what that really means, but the material specs are at the bottom. Can you make heads or tails of it by chance? http://www.maudlinproducts.com/1281.xml?cat=1291
[15:32:53] <andypugh> http://silsden.net/yorkshiredialect/dictionary.htm
[15:33:14] <Jymmm> lol
[15:33:39] <Jymmm> A Brit to Earth dictionary, nice.
[15:34:06] <andypugh> full-hard temper sounds good. (shim is often somewhat annealed)
[15:34:55] <andypugh> It does seem quite expensive.
[15:35:16] <Jymmm> andypugh: I got a sample of it, and it's what I need. But they are taking like 40 days to process anything, so I may need to shop around, but I'm not sure what I'm looking for that's equiv.
[15:35:42] <Jymmm> I tried 316L and that's a no go.
[15:35:59] <Jymmm> 412 is a no go.
[15:36:02] <andypugh> http://www.ebay.com/itm/Stainless-Steel-302-Shim-Stock-Roll-Full-Hard-Temper-2B-Finish-/300745381658
[15:37:48] <r00t4rd3d> goto lowes and get a roll of flashing
[15:38:06] <Jymmm> r00t4rd3d: that's aluminum, not SS
[15:38:34] <Jymmm> andypugh: But since theirs is a hybrid, which do you think I should be looking at more, the 302 or 304?
[15:38:37] <r00t4rd3d> even better, it will retain its value
[15:38:58] <andypugh> Not sure, to be honest.
[15:39:17] <Jymmm> andypugh: Yeah, with the multiple sub grades, me neither.
[15:39:35] <Nick001-Shop> andypugh> yes - don't know if they work yet - have to get the pinouts from acu-rite and test them
[15:50:27] <r00t4rd3d> http://www.brandsoftheworld.com/
[15:50:37] <r00t4rd3d> Mmmmm free logo vectors
[15:57:58] <Nick001-Shop> Andypugh: which Gecko is a self pulsing driver?
[16:26:51] <DJ9DJ> gn8
[16:40:03] <andypugh> Nick001-Shop: None of them (as far as I know)
[16:41:32] <andypugh> I was talkikng about these: http://www.zappautomation.co.uk/uim24302a-self-pulsing-miniature-stepper-driver-p-556.html?cPath=9_3_4
[17:02:13] <Nick001-Shop> andypugh: Specs look interesting - have to find them in the US maybe
[19:09:42] <r00t4rd3d> still need to clean it up some but :
[19:09:43] <r00t4rd3d> http://imgur.com/a/FpaDD
[19:10:04] <r00t4rd3d> and stain/seal it.
[19:13:53] <tjb1> Are you going to stain just the bucks, name and engraving?
[19:15:10] <r00t4rd3d> ill make those slightly darker just with wiping
[19:15:46] <r00t4rd3d> let it pool a bit in the cuts
[19:15:55] <r00t4rd3d> wipe the flats down
[19:32:42] <r00t4rd3d> lmfao this guy did his floor with free samples: http://i.imgur.com/qedz2.jpg
[19:33:27] <andypugh> I like the result
[19:34:35] <andypugh> on a whim I searched, adnd found: http://purpleheartflooring.com
[19:39:22] <Valen> r00t4rd3d: i always admire the fiddly bits on your stuff
[19:40:03] <tjb1> r00t4rd3d: How exactly do you stain just the cuts but not the face? Do you stain it all and sand the face?
[19:50:40] <r00t4rd3d> fiddly bits?
[19:51:07] <r00t4rd3d> tjb1, i stain the whole thing then just wipe off the flat stuff
[19:51:35] <r00t4rd3d> but u have stained the cuts before and sanded the face down
[19:51:40] <r00t4rd3d> but i have*
[19:51:58] <r00t4rd3d> paint the cuts with a paint brush
[19:52:30] <r00t4rd3d> if you put a light coat of sealer on before you cut, the stain wont take to the wood as well a the cuts
[19:52:32] <tjb1> Just wiping it off right after putting it in the cuts keep it from staining the face?
[19:52:44] <r00t4rd3d> no it stains the face, just makes it lighter
[19:53:59] <r00t4rd3d> im gonna stain it in a bit, ill show you another pic
[19:55:33] <jdh> red oak?
[20:00:45] <r00t4rd3d> yeah
[20:01:19] <Valen> the little arty flowery engraving parts
[20:04:04] <r00t4rd3d> oh
[20:04:12] <r00t4rd3d> flourishes :D
[20:07:35] <tjb1> Anyone here experience in java?
[20:07:41] <tjb1> I need a tad bit of help
[20:24:16] <r00t4rd3d> tj you still doing the tether thing?
[20:24:46] <tjb1> to phone?
[20:24:53] <r00t4rd3d> yeah
[20:25:11] <tjb1> not very much anymore, I am at school most of the time now
[20:29:34] <tjb1> Why?
[20:34:26] <r00t4rd3d> just wondering
[20:34:47] <tjb1> You wonder too much
[20:37:20] <r00t4rd3d> bout sanding and staining time
[20:38:37] <r00t4rd3d> its been cold around here, been taking my stain 2 days to dry :(
[20:40:12] <r00t4rd3d> i need a heat gun
[20:45:54] <Thetawaves> http://www.youtube.com/watch?v=VfomloUg2Gw
[21:20:51] <tjb1> java is horrible :(
[21:26:06] <r00t4rd3d> http://imgur.com/a/zIVF7
[21:26:10] <tjb1> http://img341.imageshack.us/img341/882/img8362l.jpg
[21:26:27] <r00t4rd3d> the box stained and a maple and birch end table top i am working on
[21:26:28] <tjb1> can anyone identify what board is plugging into the G540 at the top left of the picture
[21:26:52] <tjb1> Looks great r00t4rd3d
[21:27:10] <r00t4rd3d> its some type of relay
[21:27:53] <r00t4rd3d> a ethernet replay
[21:29:18] <tjb1> Its an expansion board from candcnc but im not sure which
[21:30:48] <tjb1> Actually its this - http://www.candcnc.com/images/LCTHC/G540-Interface2-342.png
[21:31:38] <tjb1> JT-Shop: You here?
[21:31:42] <r00t4rd3d> lol
[21:31:47] <r00t4rd3d> i doubt it
[21:32:02] <r00t4rd3d> JT-Bed
[21:32:35] <tjb1> I dont need a relay for a ground signal do I?
[21:33:02] <tjb1> This thing is talking about firing the torch relay
[21:37:01] <r00t4rd3d> i dont have a clue
[21:39:03] <r00t4rd3d> the only thing i can think of is the output off the g540 is not even to trigger the torch relay
[21:39:17] <r00t4rd3d> is not enough*
[21:39:56] <r00t4rd3d> by looking at the spec sheet you should be able to tell if that is wrong or right
[21:41:04] <r00t4rd3d> say the torch relay needs 110v or someshit and the g540 only outputs 12v , that board would bump it up enough to trip the torch relay
[21:41:08] <r00t4rd3d> im high.
[22:08:37] <Valen> came up nice r00t4rd3d
[22:09:37] <Valen> could be some isolation or some such?
[23:06:22] <skorket> If I attached an RC brushless DC motor to an ER11 collet and shank, what kind of runout do you think I could expect?
[23:06:32] <skorket> and what ball bearings should I use for such high speeds?
[23:17:11] <r00t4rd3d> http://www.buildlog.net/blog/2011/09/new-brushless-dc-router-spindle/
[23:18:16] <tjb1> r00t4rd3d: bed time
[23:21:22] <r00t4rd3d> http://farm4.static.flickr.com/3007/3107033319_58ff1e2872.jpg
[23:21:29] <r00t4rd3d> that one looks pretty sweet
[23:41:05] <jrshaul> Does anyone know of a shop that can laser-cut HDPE?
[23:41:24] <jrshaul> I know it's fumetastically awful to work with.
[23:53:03] <toastydeath> how is hdpe hard to work with