Back
[00:03:22] <tjb1> Woo, downloads folder empty
[00:03:53] <tjb1> Dropbox is a mess :/
[00:09:04] <tjb1> If someone could convert this -
https://dl.dropbox.com/u/3090951/HITCHPLATE.MCX - to dwg, that would be amazing
[00:31:24] <tjb1> Well computer, dropbox, and 1 hard drive down…2 hard drive to go
[02:08:35] <DJ9DJ> moin
[02:23:46] <cncbasher> tjb1: change the mcx extension to dxf should do the trick
[02:33:49] <archivist> how would that work as it is internally a mastercam format
[02:35:22] <archivist> getting a converter
http://www.fileinfo.com/extension/mcx
[02:36:03] <tjb1> archivist: I was hoping someone had mastercam here
[02:36:59] <archivist> I think one or two do
[02:38:00] <cncbasher> older mastercam files were just dxf formats
[02:38:36] <cncbasher> i have mastercam but not installed at the moment ,
[02:38:43] <tjb1> I can do it when I get back to school but thats a month away
[02:39:21] <cncbasher> i need to go out for half an hour shortly , i can convert it once i return
[02:39:31] <archivist> dxf format is documented so you can look in the file and work it out
[02:39:36] <tjb1> Ill be asleep here shortly :)
[02:40:06] <archivist> it is breakfast time
[02:40:28] <tjb1> Lucky you
[02:43:48] <tjb1> Got bacon?
[02:44:35] <archivist> crumpets
[02:45:56] <archivist> http://www.warburtons.co.uk/products/breakfast/crumpets but the fat mentioned there is wrong add butter
[02:48:02] <tjb1> http://sphotos-g.ak.fbcdn.net/hphotos-ak-snc6/184414_452821448099664_1854469943_n.jpg
[02:48:36] <tjb1> So its an english muffin...
[03:04:34] <Loetmichel> mornin'
[03:11:50] <tjb1> toxx: There he is.
[04:18:49] <cncbasher> tjb1:
http://dl.dropbox.com/u/48903110/HITCHPLATE.DWG
[04:29:11] <cncbasher> http://dl.dropbox.com/u/48903110/HITCHPLATE.DWG
[08:43:30] <jdh> mhaberler: are you really here?
[08:43:45] <mhaberler> yes
[08:43:55] <jdh> is probekins yours?
[08:44:19] <mhaberler> that was never integrated, but yes
[08:44:25] <jdh> will it ever be?
[08:44:38] <mhaberler> my wine cellar is empty
[08:44:56] <mhaberler> iow: I would need some motivation ;)
[08:45:03] <jdh> heh
[08:45:21] <mhaberler> have a good use case?
[08:45:46] <ttuner> hi
[08:46:07] <jdh> not specifically. I started playing with CNC stuff to try to make PCBs but my Z has never been good enough.
[08:46:08] <ttuner> i have been asking for the probekins
[08:46:52] <mhaberler> it 'basically' works - it does have a serious issue if the path is along a edge of neighbouring triangles
[08:47:07] <mhaberler> could be some numerical instabiility problem
[08:47:38] <ttuner> there was this video at hackaday a while ago, how did they do it. just a moment
[08:47:51] <mhaberler> I dont think it is very hard - needs some tracing and though what could be wrong here
[08:48:26] <jdh> I tried someones python post-processor. It helped, but was messy.
[08:50:27] <mhaberler> well give it a spin, maybe you find the error
[08:50:59] <mhaberler> I didnt really need it, I just found the postprocessing "method" appalling
[08:51:39] <jdh> I'll try soon. I have about 5 more hours at work today then off til Jan 2
[08:51:57] <jdh> yeah. If it had some persistance, it would be better.
[09:02:39] <ttuner> http://www.youtube.com/watch?v=yqjKohZX2t8
[09:03:03] <ttuner> here it is, PCB height-probing and milling
[09:04:00] <ttuner> i thought, maybe this was done with linuxcnc, but it doesn't seems to
[09:05:02] <ttuner> ok, its done with pcbgcode
[09:14:12] <mhaberler> that fellow needs a path optimizer badly ;)
[09:15:08] <mhaberler> interesting
[09:16:33] <mhaberler> well if you give it a stab, I'd be happy to help from the sidelines
[09:19:02] <toxx> it would generally be interesting for engraving
[09:19:32] <toxx> maybe on curved surfaces
[09:21:49] <archivist> that really needs the head/spindle to point at the surface normal though
[09:23:09] <toxx> hmm, maybe just small curves :)
[09:27:11] <toxx> Loetmichel: are you arround? I was told you could give me some information about stepperdrivers in .de
[09:27:40] <Loetmichel> toxx: i am
[09:27:48] <Loetmichel> more or less
[09:27:51] <Loetmichel> <- at work
[09:28:01] <Loetmichel> what do you want to know?
[09:29:22] <toxx> stepperdriver für eine wabeco, 6A motoren
[09:29:40] <toxx> sollen wir privat chatten, um nicht zu stören?
[09:32:37] <DJ9DJ> re
[09:34:08] <toxx> ich probiers später nochmal
[09:35:20] <Loetmichel> toxx: we can do that here: only german alternative zu geco is the triplebeast from
[09:35:30] <Loetmichel> gecko
[09:35:53] <Loetmichel> http://benezan-electronics.de/shop/product_info.php?cPath=8&products_id=61
[09:35:58] <Loetmichel> sotrry
[09:36:22] <Loetmichel> toxx: we can do that here: only german alternative to gecko is the triplebeast from
http://benezan-electronics.de/shop/product_info.php?cPath=8&products_id=61
[09:36:28] <Loetmichel> now its correct
[09:37:08] <toxx> i see
[09:37:45] <toxx> i am from fablab munich and we will buy a wabeco machine without drivers, 6A
[09:37:45] <jdh> they also went for fixed 10x uStep?
[09:39:16] <toxx> the driver is for 5A, is this no problem
[09:39:54] <Loetmichel> no, 1/5 and 1/10
[09:40:15] <Loetmichel> toastydeath: no problem, just a bit weaker than possible, but the motors stay cooler
[09:40:41] <Loetmichel> benezan has also beast and bigbeast, which are tsingle motor drivers in bigger
[09:40:50] <Loetmichel> grrr, i meant toxx
[09:41:12] <toxx> ok, thanks for the inf. interesting
[09:41:49] <Loetmichel> but benezan is the only one in germany who proiduces reliable CNC stepper drivers
[09:41:52] <toxx> you have experience with that?
[09:42:00] <Loetmichel> ... the only one in know of, that is ;-)
[09:42:14] <toxx> what about isel or nanotec?
[09:42:24] <Loetmichel> with the triplebeast: some. the beast i have seen only once
[09:42:39] <Loetmichel> but runs smooth and havent seen ansy complaints
[09:43:05] <Loetmichel> toxx: depends on your budget
[09:43:17] <toxx> i found this:
http://de.nanotec.com/schrittmotorsteuerungen.html
[09:43:23] <Loetmichel> the nanotec is overpriced japan/china chips relabeled
[09:43:33] <Loetmichel> isel ist just overpriced ;-)(
[09:43:50] <toxx> yes, that was my feeling too
[09:45:41] <toxx> money isn't that problem. It should be reliable
[09:46:05] <Loetmichel> benezans stuff IS
[09:46:21] <Loetmichel> you can buy them at sorotec.de
[09:48:00] <zoni1983> i need help with motenc lite
[09:48:24] <toxx> what do you mean with IS?
[09:48:43] <toxx> Leadshine?
[09:50:07] <zoni1983> i have an analoge drive with 250 ppr encoder
[09:51:19] <zoni1983> in a full circle the encoder gives 1000 pules with a 5mm pitch screw
[09:52:49] <Loetmichel> reliable
[09:52:54] <zoni1983> when i enter 1000 in input scale the motor does not rotate smoothly but whe i ender 9000 it works fine
[09:53:03] <zoni1983> why does rhis happen
[09:53:19] <toxx> ok, thanks a lot.
[09:54:10] <pcw_home> Ifyou change the input scale you will change the PID gain
[09:55:28] <pcw_home> input scale should probably be 200 (for mm machine units)
[09:55:54] <zoni1983> the pid value is 100 if i increase it the motor start vibrating
[09:56:24] <zoni1983> yes the input scale should be 200
[09:57:17] <pcw_home> but the PID gain is dependent on your input scale so you need to tune after the input scale is set
[09:58:03] <zoni1983> what do u suggest the p value should be
[09:58:38] <pcw_home> what type of drive (velocity, torque, Hbridge?)
[09:59:15] <zoni1983> it is old analue drive i think hybrid
[09:59:47] <pcw_home> Does the motor have a tachometer?
[10:00:00] <zoni1983> yes
[10:00:13] <pcw_home> OK likely velocity mode
[10:00:33] <zoni1983> ok
[10:01:36] <pcw_home> so increase P until you get oscillations (jog to start oscillations) and then back off to about 1/2 the value that oscillated
[10:02:33] <pcw_home> Then you need to adjust FF1 to minimize following error during high constant speed
[10:02:37] <bnz> hi guys i have almost got my mill fully cnc'd and was wondering what toolpath software i should use for emc. i use linux and mac osX and have a 3 axis mill with dividing head. (just short one toothed belt and all the axis would be powered )
[10:03:04] <pcw_home> (I am assuming the drives velocity loop is tuned)
[10:03:52] <zoni1983> when i enter the input scale 1000 the oscilation start at about 15 only
[10:04:47] <zoni1983> should this happen
[10:04:51] <pcw_home> Right, if you lower the input scale you raise th PID gain
[10:06:38] <pcw_home> so set input scale correctly and 'P' very low to start
[10:07:22] <zoni1983> but if enter 1000 scale the motor oscilate very hard at even at 100 p
[10:07:47] <pcw_home> so set P to 1
[10:08:04] <zoni1983> should it be so low
[10:08:31] <pcw_home> its value is _dependent_ on input scale
[10:09:50] <pcw_home> which is why you must set input scale first
[10:09:52] <zoni1983> ok then one more thing i cannot get the out put voltage above .7 even at rapid go and motor rotates slowly
[10:11:41] <zoni1983> in increased the accelaration and other values but nothing
[10:11:52] <pcw_home> I'm not familiar with Motenc but you probably need to do something with the DAC scale or PID max output
[10:12:32] <zoni1983> does this depend on pid
[10:12:40] <pcw_home> you can trace backwards though the HAL signals to see where you output is limited
[10:12:53] <pcw_home> s/you/your/
[10:13:30] <pcw_home> the PID comp has a max output parameter which might be the limiting factor
[10:14:08] <zoni1983> ok thanks i will try and get back to u
[10:14:11] <pcw_home> also I dont know how the output scale (DAC scale) is set on the Motenc
[10:14:41] <zoni1983> can i send u the i
[10:14:55] <zoni1983> ini and hal files
[10:16:34] <pcw_home> post them on pastebin.com
[10:35:09] <JT-Shop> sliptonic: I'm out in the shop now
[10:42:25] <tom3p> cheap mpg? resolver tester? scrap vcr heads have rotary xformers
http://nutsandboltsandflyingsparks.blogspot.in/2012/07/i-got-spinners-dawg.html
[10:56:23] <skunkworks> tom3p: I didn't read through it all - but it looks similar to changing a stepping motor into a mpg
[10:57:29] <skunkworks> seen less ccompliccated ones..
http://www.webx.dk/oz2cpu/20m/encoder.htm
[10:58:55] <tom3p> my thought was 1) with encoder wheel its just an mpg, but 2) before chucking the innards, it has what looks like a resolver in it and maybe of use with anydpugh's arduino work
[11:07:49] <tom3p_> never ever search irc channels in xchat-gnome. it hangs. the dialog window drags and erases on the window below. dangit thats MY rule & I forgot!
[11:08:21] <mrsun> all irc chats hangs when doing a channel scan
[11:08:28] <mrsun> it has never ever worked :P
[11:09:02] <cradek> usually a busy irc server will have way too many active channels to list.
[11:12:28] <tom3p_> faq: "Check the Gelhausen site for a current list."
[11:12:45] <tom3p_> http://irc.netsplit.de/channels/?net=freenode
[11:13:03] <tom3p_> bookmark it tommy!
[12:04:20] <IchGuckLive> hi all around the World at the last day of the World O.O
[12:05:39] <tom3p_> well then, goodbye for a while :)
[12:27:56] <tom3p> gene77, are you geneH?
[12:33:45] <tom3p> http://videobin.org/+68b/6wq.html
[12:35:16] <IchGuckLive> Tom3p is it 2.64
[12:36:10] <IchGuckLive> looks like 2.49b
[12:42:07] <andypugh> I haz missing plugin. Am I missing much?
[12:43:03] <IchGuckLive> im figting always with the flash on linux wrong color
[12:45:11] <archivist> I haz werkin plugin
[13:10:19] <andypugh> archivist: How does one work out how deep to cut with a hob?
[13:11:19] <archivist> some data is with a hob, or I cut multiple passes till I am happy
[13:12:33] <andypugh> The hob came with no data
[13:13:02] <archivist> what numbers are on the side, part number or some extra
[13:13:28] <andypugh> I bought one of those overpriced hobs from eBay earlier, by the way. Though that is unrelated. It looks to be for making T5 pulleys, and has the correct bore for my horizontal arbor.
[13:14:08] <andypugh> The hob I am taking about has (IIRC) just helix angle and mod.
[13:14:10] <archivist> also it depends if it is topping or not
[13:14:37] <andypugh> The one I am using today was from arc-eurotrade. It's rather teeny.
[13:15:18] <archivist> I usually have been using random unknown hobs and assumed topping and repeated to the correct od
[13:15:46] <andypugh> I will just cut till it looks right then. But yes, it it is a topping cutter then that makes sense.
[13:15:58] <archivist> now you may guess why gearing must never be lost :)
[13:16:06] <andypugh> Of course, then you are making assumptions about addendum....
[13:17:18] <archivist> I have a mod 1 from arc euro which I used a few of years ago
[13:18:51] <archivist> the real toys to properly measure what one makes are just too expensive
[13:19:36] <andypugh> http://i200.photobucket.com/albums/aa294/oldtiffie/measuring/Gear-measure1.jpg ?
[13:19:51] <andypugh> I think my dad has one.
[13:20:14] <archivist> I have never got one of those yet
[13:20:33] <andypugh> But his was bigger, as he rarely worked on any gear less than 1m diameter, and often several times that.
[13:21:15] <andypugh> I recall him paying £1000 excess baggage charges once to being one (broken off) tooth home.
[13:22:15] <archivist> hmm odd toy on fleabay 140779835755
[13:22:55] <archivist> there was a gear measuring machine on fleabay for a long while for a few thousand
[13:23:16] <andypugh> http://www.ebay.co.uk/itm/gear-tooth-vernier-20-2-D-P-/321042022429?pt=UK_Home_Garden_PowerTools_SM&hash=item4abf98801d
[13:24:17] <andypugh> I have to say that that is definitely the nicest one of those Gleason things I have ever seen. Also the worst.
[13:24:44] <t12_> for smallish gears would
[13:24:50] <t12_> using a scanner be pretty easy/accurate now
[13:25:00] <archivist> scanner! no way
[13:25:11] <t12> i guess assuming you're only looking at it in 2d
[13:25:42] <archivist> http://gears.archivist.info/gears/IMG_1214_hires.JPG
[13:26:24] <archivist> and those verniers are a bit big too
[13:53:46] <tom3p> IchGuckLive, its 2.49b the pynode capability was defeated in 2.5 up to my present 2.65, supposed to reappear in 2.66 tho
[14:21:55] <tom3p> any suggestions for low profile precision vises?
[14:21:57] <tom3p> my sable 2015 has limited Z open height, my schmidt vise leaves about 2mm stroke, just enuf for the brackets im making. (just)
[14:22:29] <jdh> what material are you holding/cutting?
[14:24:17] <tom3p> alum brackets, 1.5mm thx, rt angle
[14:24:28] <tom3p> legs are 1.5"
[14:25:22] <tom3p> the leg in the jaw can be reduced to 14mm before cnc
[14:26:01] <archivist> soft jaws maybe
[14:26:46] <tom3p> short jaws is what im after, i got no Z stroke ( i almost got no room for my hands to put in the parts )
[14:27:46] <tom3p> i'll do something with 123's bolted to table :/
[14:27:59] <archivist> I some times just clamp stuff on the table, add clamped blocks to clamp against
[14:29:33] <tom3p> yeh, the Sable2015 has flat plate table, no tslots, but lotsa room for tapped holes :)
[14:30:08] <jdh> I clamp things down to the table on my router
[14:30:22] <jdh> or to a spoilboard on the table.
[14:36:39] <tom3p> 3R used to have a plate with a rear rt angle as a nest.
[14:36:59] <tom3p> forward of the nest, on the plate, was a grid of holes that you placed pins in, the pins were cross tapped for thumb screws.
[14:37:16] <tom3p> the thumb screws squeezed that part into to corner nest. the hole grid allowed different size parts ( all in a 4" diameter, 1.5" tall package )
[14:44:05] <tom3p> this idea
http://ftool.com/en/shop/index.php?script=/en/shop/wScripts/produkt_details.ws&article_id=FT%2001087&top_product=1
[15:18:05] <L84Supper> https://www.asiga.com/products/ these guys actually claim 1um accuracy in their Z axis in their data sheets, have they no shame?
[15:20:45] <L84Supper> "theoretical software setting accuracy" vs "real physical world measurable accuracy" or maybe their repeatabilty is only +- 10um with 1um accuracy
[16:21:33] <DJ9DJ> gn8
[16:35:13] <JT-Shop> Tom3
[16:51:04] <Valen> damn amercian centric apocalypses
[16:54:06] <andypugh> A friend noticed that the Mayan exhibition in a museum in the town where he lives (Hamburg I think) was due to close on Friday. I wonder if that was deliberate?
[16:54:29] <andypugh> Valen: Clearly the apocalypse will be scheduled GMT!
[16:54:54] <andypugh> I am moderately happy with this evening's work.
https://picasaweb.google.com/lh/photo/SdvfSId15Za3-noq57yQHtMTjNZETYmyPJy0liipFm0?feat=directlink
[16:55:13] <andypugh> 204 teeth to debur now.
[16:55:37] <andypugh> I expect Archivist will spot the "deliberate error"
[16:57:29] <L84Supper> andypugh: what's the material?
[16:57:53] <andypugh> Delrin
[16:58:39] <andypugh> 0.8 mod. A 51:51 pair and a 36:66 pair. That is to suit the two possible final drive ratios of the vertical head.
[16:59:19] <L84Supper> what's the diameter of the lower right one?
[16:59:58] <L84Supper> hard to judge the size except for the crease in that paper
[17:11:50] <tjb1> Ah thats awesome...
[17:12:02] <tjb1> Gecko is closed from tomorrow until January 2nd
[17:21:18] <andypugh> Well, 0.8 mod and 51 tooth tells you everything you need to know :-). They are 51 * 0.8 mm diameter.
[17:21:26] <JT-Shop> http://linuxcnc.org/index.php/english/forum/38-general-linuxcnc-questions/25968-linuxcnc-software
[17:21:39] <andypugh> A gurl?
[17:22:51] <JT-Shop> could be...
[17:23:05] <tjb1> I read that as Cand(ice) because of candcnc
[17:23:17] <JT-Shop> does it matter where the axises are placed on the control board?
[17:23:52] <andypugh> It's a fair question, and the answer is "No"
[17:24:22] <FinboySlick> I hate walking in on Negative Andy.
[17:24:25] <p0st4L> tjb1,
[17:24:28] <p0st4L> i ordered that stepper kit
[17:24:36] <tjb1> Which one?
[17:24:41] <p0st4L> the $520 one
[17:24:45] <tjb1> cncrouter?
[17:24:48] <p0st4L> rgr
[17:24:57] <tjb1> rgr?
[17:24:58] <p0st4L> should be here next week sometime
[17:25:04] <p0st4L> rgr = roger = confirm
[17:28:07] <andypugh> That was a positive answer, actually.
[17:33:18] <JT-Shop> I guess it depends on how you read the question, and I think I missed the vital clue
[17:33:45] <FinboySlick> But the whole point is to be clueless.
[17:34:12] <JT-Shop> I'm usually clueless...
[17:35:20] <JT-Shop> so that is a TB6560 board?
[17:36:30] <JT-Shop> how much press fit can I put on a 3/4" steel plug?
[17:37:44] <andypugh> How big is your press?
[17:37:54] <tjb1> I would look that up in the handbook but I don't have good luck finding what I am looking for in that
[17:38:29] <JT-Shop> 50 tons
[17:38:32] <cradek> JT-Shop: before what happens?
[17:38:58] <JT-Shop> enough for a tight fit
[17:39:07] <JT-Shop> the stock is 0.748"
[17:39:40] <JT-Shop> I'm planning on pressing in the plugs, tig weld the edge then redrill the hole in the proper place
[17:43:24] <andypugh> Mke the plugs about 5 x as long as needed and slightly tapered from -.0005 under to +.005 over, then keep pushing until the press can't push any further. Then machine flat?
[17:44:44] <JT-Shop> I was going to put a little lead in taper... the press can bend big things I know
[17:48:42] * JT-Shop looks for some general rule of thumb
[17:49:41] <cradek> with a taper I bet you could push a lot with 50 tons. maybe the consideration is how much you want to distort the part.
[17:50:15] <cradek> (I didn't read back to see what you're doing)
[17:51:02] <JT-Shop> I drilled a hole in the wrong place on a piece of 1/2" x 2" A36 HR
[17:51:10] <Loetmichel> *ha!* I love it when a plan comes together... first air duct done... now i will mill the second one, then tomorrow in the company ( ehrm, in 7 hrs) some alu tape over the edges. mount it on the hdd cage and enjoy a silent PC... :-)
http://www.cyrom.org/palbum/main.php?g2_itemId=13826
[17:51:46] <JT-Shop> so a 3/4" hole in the proper place cleans up the old hole, so now I need to press in a plug weld it up then redrill
[17:51:58] <JT-Shop> the normal use for this is to be beat with a hammer
[17:52:52] <JT-Shop> I'm looking for a German fit you know Gootandtight
[17:53:23] <cradek> haha ok
[17:53:30] <icee> that's fairly pretty
[17:53:45] <cradek> I like the long taper idea then...
[17:54:12] <JT-Shop> a bit of googling says 0.001" per 1" of diameter
[17:55:44] <cradek> .0002 interference for a dowel pin is easy to tap in with a hammer, or a small hand operated press
[17:57:12] <cradek> bet you'll split your .5 bar before you run out of press power
[18:00:28] <JT-Shop> I bet that too
[18:03:59] <cradek> or wait is that .0005? a 1/4 dp is like .2502 I think, and is the dp reamer .2497?
[18:05:09] <toastydeath> i fucking hate reamers
[18:05:12] <toastydeath> that is all
[18:07:17] <JT-Shop> about a thou seemed right when I pressed it in
[18:22:02] <andypugh> I like reamers. Which reminds me, I need one.
[18:27:42] <JT-Shop> reamers are fun and entertaining
[18:31:12] <andypugh> I just eBayed a 3.02mm one.
[18:39:46] <Tom_itx> i generally get mine from my local surplus tool guy and mic em
[18:40:02] <Tom_itx> for like a buck or so a piece
[18:40:36] <Tom_itx> occasionally i'll grab a new one from him
[18:41:06] <toastydeath> we always drilled a hole and reamed it, then measured the hole
[18:41:09] <toastydeath> they never cut on size
[18:41:23] <Tom_itx> ok here's one...
[18:41:39] <Tom_itx> what do most of you suggest for the proper cutting removal for a reamer?
[18:41:51] <toastydeath> ?
[18:41:52] <Tom_itx> i say around .005" or so
[18:42:00] <toastydeath> whatever you pick, make it constant
[18:42:09] <toastydeath> consistency is more important than actual material condition
[18:42:11] <Tom_itx> how undersize should the drill be..
[18:42:29] <toastydeath> 5-15 thou on the diameter
[18:42:32] <JT-Shop> I usually use a 64th under the reamer for general work
[18:42:45] <toastydeath> any more and it starts to become even more variant
[18:42:50] <Tom_itx> i'm with toastydeath
[18:43:08] <Tom_itx> if i don't have a drill i'll push it to maybe .015 or .020"
[18:43:17] <toastydeath> well, JT-Shop's right because it's one drill size
[18:43:21] <toastydeath> and that's consistent
[18:43:24] <toastydeath> it's about .015
[18:43:46] <toastydeath> as long as he sticks to that, all reamed holes will pretty much come out the same size every time
[18:44:29] <Tom_itx> ok next one...
[18:44:47] <Tom_itx> can you get a more accurate hole with a reamer or a boring bar?
[18:44:51] <toastydeath> boring bar
[18:45:26] <JT-Shop> http://imagebin.org/240158
[18:45:31] <Tom_itx> we used one of those with the builtin mic
[18:46:40] <andypugh> I think these are possibly the best of all:
http://www.ebay.co.uk/itm/Floating-Reamer-David-brown-adjustable-type-/271125219084?pt=UK_Home_Garden_PowerTools_SM&hash=item3f2052870c
[18:47:37] <Tom_itx> that looks more like a hone
[18:47:40] <toastydeath> outside a jig grinder, there isn't a more accurate way to get a hole
[18:47:50] <toastydeath> than a boring bar
[18:48:11] <toastydeath> edm's pretty close though
[18:48:37] <andypugh> toastydeath: I think a floating reamer might. They have a lot in common with a boring bar, but self-guide in the hole, so are not affected by machine deflection.
[18:48:49] <Tom_itx> one more...
[18:49:07] <toastydeath> self-guiding tools produce an accurate diameter but not a geometrically sound hole
[18:49:10] <JT-Shop> I would have assumed 3 blades not 2
[18:49:13] <Tom_itx> what's a good slip fit for say umm.. a die pin and it's mating part?
[18:49:29] <toastydeath> if you mic a hole from a tool like a floating reamer or a burnisher, it comes out on size
[18:49:30] <JT-Shop> depends on diameter and lenght
[18:49:46] <toastydeath> if you then put it on a cylindrical measuring machine, it looks like crap
[18:49:47] <Tom_itx> just general questions for discussion is all
[18:50:02] <andypugh> toastydeath: A boring bar often won't make a round hole, as there is generally more X deflection than Y deflection on a typical machine.
[18:50:05] <Tom_itx> toastydeath yeah you'd think it was chewed out
[18:50:31] <toastydeath> if you're rough boring, that's true
[18:50:53] <toastydeath> if you're taking a finish pass, the error is only going to be large on truly horrible machines
[18:51:01] <andypugh> I guess if you tighten the clamps that is less of an issue.
[18:51:16] <toastydeath> or, in the case of loose clamps, poor machining practice
[18:51:40] <toastydeath> high precision boring equipment is usually pretty flimsy, it just holds position well
[18:52:09] <andypugh> I have a bot of a boring-bar fetish:
https://picasaweb.google.com/lh/photo/zAh6K3E0uRG9Uhj9WWvqG9MTjNZETYmyPJy0liipFm0?feat=directlink
[18:52:16] <Tom_itx> we used those mic style on some ~2-3" holes in Ti +.0005 -.0000
[18:52:45] <toastydeath> nice, are those wohlhaupter bars
[18:52:50] <andypugh> Yes.
[18:52:51] <Tom_itx> then after they were finished were tossed in a wire basket and forked with a forklift
[18:53:11] <Tom_itx> they tried to blame us when they didn't fit
[18:53:32] <toastydeath> Komet is another really awesome boring bar brand, if you ever see one
[18:53:45] <toastydeath> they're a more modular system
[18:53:54] <toastydeath> but still extremely accurate
[18:54:07] <Tom_itx> http://clearwateren.com/gallery.php
[18:54:16] <Tom_itx> the 3rd over part in the Ti/Steel section
[18:54:18] <andypugh> I have a really chunky one that takes the cartridges, but nothing to drive it with.
[18:54:42] <Tom_itx> the end holes were just for lightening
[18:54:49] <Tom_itx> but were probably 6" deep or so
[18:55:04] <Tom_itx> at least on the long end
[18:55:30] <toastydeath> somebody should build a contouring boring head and a machine to run it
[18:55:46] <andypugh> There ought to be a way to investment cast a lot of that sort of stuff.
[18:55:55] <toastydeath> you could probably build one for a cnc'ed bridgeport
[18:56:11] <andypugh> toastydeath: You mean like a motorised Wohlhapupter?
[18:56:38] <toastydeath> sort of - instead of the bar being moved by an external ring, there is a shaft on the inside
[18:56:45] <toastydeath> and as the Z axis moves in and out
[18:56:52] <toastydeath> it pushes a wedge to drive the boring head in and out
[18:57:10] <andypugh> Watch this space.
[18:57:12] <toastydeath> and then you use the knee/whatever to actually drive it axially
[18:57:20] <toastydeath> big ass boring mills use them all the time
[18:57:38] <toastydeath> since a lot of them have a dual z axis configuration
[18:58:15] <Tom_itx> andypugh, grain direction was critical on those. they supplied us forgings
[18:58:36] <dr00bie> what cam software do you guys use with linuxcnc? Got the horse before the cart and got my cnc built, but now am stuggling with cam software...
[18:58:37] <Tom_itx> the first 6 off were from solid billet
[18:58:52] <JT-Shop> dr00bie: I use gedit
[18:58:54] <andypugh> Tom_itx: Well, forgins are OK too. But a lot of that sort of stuff is made from lumps, isn't it?
[18:59:11] <Tom_itx> i'm not sure how they did those
[18:59:12] <JT-Shop> and ngcgui
[18:59:50] <andypugh> dr00bie: Welcome to the club. There isn't really a properly good CAM system out there.
[19:00:08] <andypugh> Or, not that I know of.
[19:01:01] <andypugh> I don't know that the status of HeeksCNC is at the moment.
[19:01:06] <dr00bie> I tried like hell to get heekscad/cnc on mine, but can't seem to get it done. Guess I need to get a Windows VM together and get it done that way...
[19:01:30] <andypugh> Is there any CAM in FreeCAD?
[19:01:46] <toastydeath> not that i can see
[19:01:57] <toastydeath> i played with it for awhile and jesus christ is it bad
[19:02:02] <andypugh> SheetCAM works OK for 2D and 2.5D
[19:02:16] <toastydeath> you're better off using librecad and just directly making your drawings
[19:02:33] <andypugh> Depends if your end-point is drawings or not.
[19:02:49] <dr00bie> pycam is an option too, but I fail to understand it as well... my complete ignorance on CAD/CAM is not helping me atm, but there is no better place for me to start...
[19:02:59] <toastydeath> it better be, because doing anything with freecad is painful
[19:03:21] <Tom_itx> there's a learning curve on any cad cam package
[19:03:23] <tjb1> SheetCAM is easy to use for plasma, never tried any router/mill type stuff with it
[19:03:40] <andypugh> I found FreeCAD to be OK, but not as slick as Alibre which is not as slick as Inventor.
[19:03:50] <toastydeath> i've used quite a few cad/cam packages, freecam is objectively bad
[19:04:20] <JT-Shop> OneCNC works for the most part but is annoying to use
[19:04:21] <andypugh> But I use 3D CAD to design stuff, not to make drawings. I can't see stuff like this:
https://picasaweb.google.com/lh/photo/X9ZXwL-oMXpF9cc6wAIbQNMTjNZETYmyPJy0liipFm0?feat=directlink well enough in 2D.
[19:05:10] <toastydeath> please tell me you didn't make that in freecad
[19:05:12] <tjb1> andypugh: Is that the same thing you had a huge picture of on here not too long ago?
[19:05:13] <andypugh> What is _very_ slick and zero-cost is Inventor Fusion. Windows and Mac only I think.
[19:05:29] <tjb1> That looks like solidworks
[19:05:29] <andypugh> No, That was done in Inventor.
[19:05:30] <toastydeath> because i'd rather hit myself in the knee with a ball peen hammer than try to model that
[19:05:32] <toastydeath> in freecad
[19:05:40] <Tom_itx> andypugh visually i agree but a 2.5d package would cut that
[19:06:00] <Tom_itx> unless the bottom is lofted
[19:06:37] <andypugh> It's all parametric and interlocking. Based around a sketch which fixes the drive belt length.
[19:06:47] <dr00bie> andypugh: i think i heard something about the free version, i've been off windows for a while now... does inventor fusion output gcode?
[19:07:01] <toastydeath> freecam isn't parametric
[19:07:03] <toastydeath> just fyi
[19:07:35] <toastydeath> it's like old school autocad 3d, where everything was a fixed point without constraints
[19:08:26] <toastydeath> try it out, it's hilarious
[19:08:36] <andypugh> No, In fact it _only_ saves as Inventor Parts, and exports SAT and STL
[19:08:51] <andypugh> I thought that FreeCAD was meant to be Parametric?
[19:09:11] <JT-Shop> I need 3-
[19:09:17] <toastydeath> roadmaps aren't what they've actually done
[19:09:21] <JT-Shop> D cad for my machines
http://imagebin.org/240162
[19:09:27] <andypugh> dr00bie: Bit from SAT and STL you can go into PyCAM I think.
[19:09:48] <toastydeath> they may do it parametrically in terms of math, but none of the modeling features you'd expect are there
[19:09:54] <toastydeath> from a parametric package
[19:10:15] <Tom_itx> JT-Shop, that's inaccurate
[19:10:21] <Tom_itx> where are the 'feet' on them?
[19:10:28] <andypugh> Attempting a Freeware CAD package is rather ambitious, I reckon.
[19:10:42] <toastydeath> it's balls ambitious, i'm really impressed with what they have so far
[19:10:45] <toastydeath> it's just not usable
[19:10:51] <JT-Shop> I don't put "feet" on customers machines just my own
[19:10:58] <toastydeath> if you REALLY NEED a mesh and don't want to deal with something like BRL-CAD
[19:11:17] <toastydeath> i could see using it for some kind of open source mesh generation
[19:11:43] <Tom_itx> ahh i thought that was one of your toys
[19:12:10] <JT-Shop> no, it assembles the blower housing on a lawnmower engine
[19:12:17] <JT-Shop> well attaches it
[19:12:37] <andypugh> Things I like about FreeCAD. 1) It runs on a MAC. But then so does Fusion, and Fusion has an interface I understand. (Howver, that is even less parametric than FreeCAD, very much aimed at push-pulll direct modelling.
[19:14:20] <andypugh> Well, I just decided to prove that FreeCAD can design stuff, but as I closed the first poly-line, it crashed out.
[19:14:30] <Tom_itx> woops
[19:14:42] <toastydeath> Science!
[19:15:26] <andypugh> Anyway, Inventor Fusion is well worth a look if you have Windows or Mac.
http://labs.autodesk.com/technologies/fusion
[19:16:22] <andypugh> It's amazingly slick on my Mac, no deiscernable UI delays.
[19:17:52] <andypugh> However, is it no help for dr00bie Who wanted CAM, not CAD as far as I cam make out.
[19:18:03] <JT-Shop> say goodnight Gracie
[19:18:05] <toastydeath> the only real cam system is your keyboard and emacs/vim
[19:18:18] <toastydeath> there used to be an APT project, i wonder what the status on that is
[19:18:32] <toastydeath> that's as close to cam as you're really going to get at the moment
[19:18:59] <andypugh> I can see Fusion + PyCAM being a workable toolchain on Mac.
[19:20:03] <toastydeath> never seen pycam, checking it out
[19:24:17] <andypugh> Night all.
[19:24:23] <Tom_itx> gnite
[22:08:00] <r00t4rd3d> homo
[22:11:48] <ReadError> bromo
[22:12:17] <ReadError> r00t4rd3d, did you build up your wooden gun arsenal ? for the bropocalypse and all
[22:23:06] <jdh> any aspire'ers?
