#linuxcnc | Logs for 2012-11-08

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[00:53:23] <spiderdijon> does any one know what the options are for controlling a huanyang vfd within axis?
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[00:58:11] <andypugh> spiderdijon: I suspect the same as controlling one in any other GUI
[00:58:40] <andypugh> I guess you don't have motion.spindle-speed-out netted to anything, so Axis is hiding the spindle control buttons?
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[01:02:18] <andypugh> spiderdijon: Are you there?
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[02:07:28] <r00t4rd3d> http://i.imgur.com/d6AJx.jpg
[02:07:36] <r00t4rd3d> cradek, ^^
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[08:21:22] <DJ9DJ> moin
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[09:32:48] <mrsun> http://imagebin.org/235096 mill screw location, is there a problem to have the mill screw at location 2 insted of 1 ? would it be better to place it on the front of the column insted? its the the way on the backside :P
[09:35:07] <archivist> mine is on the front but it depends on any bending forces and what they do to your machine
[09:35:58] * Valen had a self induced mini-hurricane sandy event
[09:36:07] <Valen> pretty intense rain storm
[09:36:13] <Valen> left the friggin windows open
[09:39:03] <mrsun> im going to stiffen the column by adding supports on the sides and backside and with that the screw is in the way on the backside :/ i could drill a hole in the head and make a nut that bolts down to the head i guess
[09:45:12] <andypugh> I had 1, and it worked. It keeps the screw cleaner too.
[09:45:45] <mrsun> andypugh, yeah it works .. .thats how the mill is constructed from the start but like i said .. its in the way for stiffening the column up =)
[09:46:01] <mrsun> if putting it on the frontside i guess there will have to be a guard for the screw
[09:46:25] <andypugh> https://picasaweb.google.com/lh/photo/eaFsesYk3n8L1Hxj_CVHD9MTjNZETYmyPJy0liipFm0?feat=directlink
[09:46:29] <andypugh> Was what I had.
[09:46:48] <andypugh> But then I changed it.
[09:47:18] <andypugh> I put the screw inside the column.
[09:47:21] <andypugh> https://picasaweb.google.com/108164504656404380542/Gibbs#5477167759873892978
[09:47:28] <andypugh> (and the following few pics)
[09:48:55] <mrsun> just milled a slot in the front of the column ? :)
[09:49:04] <mrsun> feels like something that would weaken it quite a bit
[09:49:16] <mrsun> ofc that column was kinda wide compared to mine :P
[09:49:28] <andypugh> Yes, and you spotted the flaw in the plan.
[09:49:56] <andypugh> Many columns have exactly the same arrangment as I fitted.
[09:50:15] <andypugh> I suspect those are sturdier castings. I noticed a serious reduction in stiffness.
[09:50:23] <mrsun> mm
[09:51:00] <andypugh> The plan would be to bolt a 25mm steel strip to the back of the column (nothing in the way now).
[09:52:09] <andypugh> However, I decided on a better plan for stiffening the mill: https://picasaweb.google.com/lh/photo/utT2M2OdH9qhtQZm6vyvitMTjNZETYmyPJy0liipFm0?feat=directlink
[09:52:31] <mrsun> thats about my plan, change the swivling thingie at the bottom of the mill (tilting column) to a bracket made of steel that fits the column and bolt it down tight
[09:52:42] <mrsun> the "bracket" would extend from the base atleast half way up the column
[09:52:45] <mrsun> with 20mm steel plates
[09:53:07] <mrsun> andypugh, buy a bigger one? :P
[09:53:30] <andypugh> Buy a proper one, made in Halifax by people who had seen a milling machine before.
[09:54:07] <mrsun> ye i want to buy a bigger one but the problem is the cash
[09:54:27] <mrsun> and space
[09:54:36] <andypugh> The stiffest arrangement (but not the neatest) is to bolt the screw rigidly to the top of the mill head, then have a rotating nut on a bracket at the top of the column.
[09:56:30] <andypugh> This kind of arrangement: http://biobug.org/machine-shop/mill/mechanical.php
[09:57:57] <andypugh> I think that is originally the Hoss design: http://www.hossmachine.info/cnc_conversion.html
[09:58:27] <andypugh> (Who I feel might be a better self-publicist than he is an engineer)
[10:01:00] <mrsun> need to sit down and think a bit about this.. problem with drilling a hole on the top of the milling head is that ive got a motor mount bracket there also, ofc i could incorperate the nut in that bracket and just have a straight hole throught the milling head
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[10:01:44] <mrsun> and then again, freakin china machines that nothing is straight on .. gonna have to check the dovetails of the column to see if they match the sides of it
[10:01:54] <andypugh> I think that has the screw bolted to the top of the head, no hole through.
[10:02:11] <andypugh> It's a static screw.
[10:02:21] <mrsun> andypugh, yeah but kinda annoying with a screw sticking .4 meters above the column :P
[10:03:23] <andypugh> Also look at Hoss's page on his RF45. It might make more sense to see if you can stretch to one of those rather than try to make a silk purse out of the mini-mill sow's ear.
[10:04:37] <mrsun> that looks like the ZX45 or whatever its called ive been looking at
[10:04:45] <mrsun> but it is 15000SEK to buy ... :P
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[10:05:11] <mrsun> ok might be smaller
[10:06:24] <mrsun> oh well, need to go out and get something done on the outside while theres still daylight
[10:07:12] <andypugh> You still have daylight? I thought it was permanent night in Sweden during the Winter :-)
[10:10:13] <archivist> I have the same regard for hoss :)
[10:11:01] <archivist> but old mills have proper columns
[10:12:06] <archivist> andypugh, the bits I made for the "project" http://www.collection.archivist.info/archive/DJCPD/PD/2012/2012_11_07_Drive_gear/IMG_1400.JPG
[10:12:41] <archivist> cannot be arsed with D holes
[10:18:08] <andypugh> So, how is he going to drive them?
[10:18:24] <andypugh> (Or is that his problem?)
[10:19:47] <archivist> I think a press fit on a knurled shaft or a nut clamping them to a shoulder would be enough
[10:20:25] <archivist> or a pin in a shoulder through the face
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[10:21:28] <archivist> if his qty expectations are to be met it has to be cheap and easy to do, and the cutting process has to be robust
[10:22:25] <archivist> a D hole reduces the screw size I can use for clamping
[10:25:48] <andypugh> Not if you later press in a D-rod in an adjacent hole, like the picture I sent.
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[10:27:12] <archivist> but that means two holes and that means a well clamped milling operation for the second hole and a press operation
[10:28:19] <archivist> he came up with the same idea and said "simple drill" and drilling at the side of a hole is never simple
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[10:30:25] <andypugh> Take a solid bar, drill the off-centre hole all the way through. Turn down (centred) to make a spigot to mount the gears, and you have a reasonably good drilling jig. It would probably work best with a slot-drill.
[10:30:43] <archivist> personally I think a carbide punch is probably the right answer in production
[10:31:03] <andypugh> CNC shaper.
[10:31:40] <andypugh> Does a D-shaft take a thread well enough to work in the hobbing arbour?
[10:32:35] <archivist> the tapered cut sort of says no hobbing unless the hob is very special
[10:33:00] <archivist> and now I have that barber colman hob book :)
[10:33:32] <archivist> I could make some evil comments to the tool table thread
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[10:34:53] <archivist> single position hobs look evil to design
[10:36:37] <archivist> book has the hobs that put the taper on old style car starter ring gears at the same time as the involute
[10:47:58] <andypugh> That sounds clever.
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[10:57:39] <archivist> the hob is called a mutilated-tooth, single position hob
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[11:03:55] <archivist> a google takes one to the patent by barber colman emloyees in the 1940's http://gears.archivist.info/US2414790.pdf
[11:04:14] <andypugh> http://books.google.co.uk/books?id=LYFFYiV1fq4C&pg=PA722&lpg=PA722&dq=single+position+hob&source=bl&ots=_a2-_RmDPr&sig=ZvJ2YbwLyt_D5iJTVA6-5TFTL5s&hl=en&sa=X&ei=GpGbULiSN8SA0AWF14GADw&ved=0CEkQ6AEwAw#v=onepage&q=single%20position%20hob&f=false
[11:05:09] <andypugh> It sounds like an alternating-tooth hob would suit that job of yours.
[11:06:23] <archivist> except for the taper, which changes it a bit
[11:09:11] <andypugh> If you are wondering at my unaccustomed online presence on a work-day. I took a test car home last night, and it had a flat battery this morning. I am awaiting colleagues turning up with a jump-start car.
[11:09:17] <archivist> but a tangential feed to the hob and a change it its helix at the same time
[11:09:36] <archivist> I did wonder :)
[11:10:02] <archivist> did you leave the monitoring switched on?
[11:10:43] <andypugh> No, I have no idea why it went flat. Possibly the gearbox controller failed to go to sleep.
[11:10:50] <archivist> I would hack a bench psu to get some charge
[11:11:20] <andypugh> I have my battery charger plugged in. But it's a 1A charger and a 300Ah battery...
[11:12:08] <mrsun> andypugh, nah ... got a couple of hours :P
[11:12:17] <archivist> 300 takes some flattening!
[11:12:18] <mrsun> 09:00 - 15:00 about now
[11:12:36] <andypugh> I would have tried my motorbike battery, but of course the motorbike is at work...
[11:13:20] <andypugh> The 240A alternator makes a rather faster job of topping it up.
[11:15:06] <archivist> push start it then :)
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[11:16:42] <archivist> I suppose my 1960 hilman minx had the same design failure of cant push start with a flat battery (iron powder magnetic clutch)
[11:18:08] <andypugh> Yeah, this can't engage clutches without a running engine.
[11:18:12] <Loetmichel> connect the battery with a diode and a 2kw halogen light in series to the mmains ;-)
[11:19:42] <archivist> the hilman would connect the dynamo across the coils for the clutch action was clever for the period
[11:21:38] <Loetmichel> its like the fors mercedes actros: air supported gearbox... motor can only start in neutral... air tanlks empty and parked with gear in: needs external air presser :-)
[11:21:55] <Loetmichel> s/fors/first
[11:22:27] <andypugh> It seems that Subaru used (or maybe even still use) magnetic particle clutches
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[11:23:27] <Loetmichel> my ex vompany had that a couple of times until mercedes changed the software so that the engine can be started with one foot on the clutch and a second on the brakles... with a gear in
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[11:49:46] <archivist> I do think some safety devices add danger, in your case I could not get myself out of trouble on the starter motor with a dead engine
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[11:58:23] <jthornton> on my uplander van if you open the door with the remote and use the door button to lock it and don't start it inbetween you will have a dead battery in the morning as it never turns off the lights
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[15:22:14] <archivist> coffee time and I have a run out of cake error grrrr
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[15:37:04] <jthornton> monkey pickle time...
[15:38:03] <skunkworks> Mmmm Chocolate choclolate chip muffins....
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[15:49:19] <pcw_home> stumpy monkey time
[15:49:21] <pcw_home> http://www.youtube.com/watch?v=aLwCyfuENr8
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[15:57:40] <cradek> pcw_home: the election was days ago. you shouldn't still be drinking.
[15:59:37] <jdh> we lost.
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[16:05:55] <skunkworks> sorry to hear that.
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[16:08:35] <mutilator> so for engraving on curved/sloped surfaces, what're the methods out there to compensate
[16:08:43] <mutilator> i imagine prob or 3d scan
[16:08:45] <mutilator> probe
[16:09:03] <mutilator> and manually adjusting i guess
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[16:10:05] <tom3p> msg NickServ identify derf132
[16:10:11] <tom3p> crap
[16:10:36] <mutilator> o_O
[16:10:55] <tom3p> wtf eats the 1st char damnit
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[16:12:40] <archivist> mutilator, have you asked on the user mailing list
[16:13:36] <mutilator> probly the langoliers tom3p
[16:13:41] <mutilator> archivist: nope
[16:13:56] <mutilator> is there a maillist archive?
[16:14:02] <mutilator> i'm sure someone has asked before
[16:14:03] <archivist> mutilator, recent list question http://osdir.com/ml/emc-users-enhanced-machine-controller/2012-11/msg00042.html
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[16:14:47] <archivist> start here better http://osdir.com/ml/emc-users-enhanced-machine-controller/2012-11/msg00040.html
[16:15:11] <tom3p> archivist, just wanted to make this known http://papilio.cc/ open src fpga toolset uses java front end (processing) like arduino, has live/iso & a VM img
[16:15:50] * archivist runs as fast as possible from anything with java in it
[16:16:37] <JT-Shop> I have a two cup limit for java
[16:16:59] <tom3p> haha ( this months favorite language)
[16:18:04] <tom3p> the idea is a bazillion gates and a simple scripting language to arange them
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[16:23:30] <tom3p> JT-Shop, about to release my nick etc, i have gmail, is that a prob for my re-entry?
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[16:28:51] <tom3p> JT-Shop, nm, other opts avail to clean it up
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[16:36:39] <JT-Shop> tom3p: ?
[16:36:48] <tom3p> never mind, thx tho
[16:39:19] <JT-Shop> http://gnipsel.com/shop/anvil/images/anvil-stand-09.jpg
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[17:20:30] <mutilator> so anyone here use a probe?
[17:20:49] <pcw_home> thats too personal
[17:20:51] <JT-Shop> yea
[17:20:57] <JT-Shop> LOL
[17:21:00] <skunkworks> all the time
[17:21:20] <archivist> no, it is too big
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[17:22:08] <archivist> and I missed out on some tips on fleabay the other day
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[17:26:59] <jdh> these probes: http://www.ebay.com/itm/130692968430 ?
[17:27:38] <jdh> err... I mean: http://www.ebay.com/itm/221148564756
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[17:31:22] <mutilator> http://www.ebay.com/itm/150931049789
[17:32:52] <jthornton> that only works in Mark 3
[17:32:56] <archivist> I see he falsely puts renishaw in the title line
[17:33:03] <jthornton> LOL
[17:33:15] <mutilator> well.. something like that
[17:33:50] <mutilator> know of something that works with linuxcnc then?
[17:34:06] <pcw_home> Its just a switch, should work for anything
[17:34:07] <jthornton> just kidding
[17:34:51] <pcw_home> "You need a Mach 3 license to enable the Mach 3 digitizing wizard"
[17:37:18] <jthornton> http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=deepgroove1&iid=150931049789&de=off&items=25&which=negative&interval=365&_trkparms=negative_365
[17:37:25] <jthornton> interesting feedback
[17:38:41] <archivist> I wonder what the buyer thinks is complete
[17:38:55] <pcw_home> but its just a NC switch what does he expect?
[17:39:11] <pcw_home> maybe needs a LED
[17:40:43] <pcw_home> Or maybe the Renishaw keyword confused the buyer into thinking its was wireless or something
[17:41:50] <archivist> I do believe adding undeserved keywords is a crime over here (advertising standards)
[17:42:24] <jthornton> I don't do business with folks like that
[17:42:37] <archivist> also it is "passing off" so Renishaw could take him to the cleaners
[17:44:22] <archivist> as a brit I support Renishaw :)
[17:45:10] <jthornton> mutilator, did you have a question about using a probe?
[17:45:38] <mutilator> looking to get one so i can adjust for engraving on surfaces
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[17:50:45] <IchGuckLive> hi all
[17:51:06] <IchGuckLive> Aero-Tec: did you chip
[17:51:32] <Aero-Tec> not yet
[17:51:44] <Aero-Tec> close
[17:51:54] <IchGuckLive> O.O B)
[17:52:28] <Aero-Tec> I had to do a module repair for a local guy
[17:52:47] <Aero-Tec> I repair car electronics as well
[17:53:04] <IchGuckLive> im also sitting in the middle of the elektronic garbige
[17:53:07] <Aero-Tec> ECMs and other car electronics
[17:53:29] <IchGuckLive> are you building your own Tessla
[17:53:40] <Aero-Tec> lol
[17:53:48] <Aero-Tec> I could but have no plans for one
[17:54:01] <Aero-Tec> I need to build things that make money
[17:54:17] <IchGuckLive> on the president case you shoudt go for it
[17:55:29] <Aero-Tec> what do you do for work?
[17:55:50] <IchGuckLive> only programming and teatching
[17:56:06] <Aero-Tec> programming what?
[17:56:12] <IchGuckLive> G-code
[17:56:15] <Aero-Tec> I have done programming as well
[17:56:34] <mozmck> Aero-Tec: you work with airplanes?
[17:56:39] <IchGuckLive> cad to Mashine Called CAM
[17:56:58] <Aero-Tec> I have written a POS program, POS stands for point of sale
[17:57:08] <Aero-Tec> and other programs as well
[17:57:50] <mutilator> ..
[17:58:16] <Aero-Tec> I do not work on plains, I am wanting to do some stuff with model plain and would love to own and fly my own plain some day
[17:59:00] <mozmck> I see. I have parts of a real plane and plan to built my own hopefully.
[17:59:16] <Aero-Tec> I also do 3D modeling and have a few CAM programs
[17:59:37] <Aero-Tec> I would love to build my own some day
[17:59:46] <Aero-Tec> I love to fly
[17:59:59] <Aero-Tec> what parts do you have?
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[18:00:38] <mozmck> Parts of a 1940's Funk
[18:01:14] <mozmck> I plan to use some of them to build a homebuilt.
[18:01:17] <mozmck> brb
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[18:05:22] <mutilator> so what ya think of that probe? sufficient?
[18:07:20] <Aero-Tec> who are you talking to?
[18:07:33] <Aero-Tec> nice looking plane BTW
[18:08:27] <mutilator> pcw thornton archivist anyoen else
[18:10:02] <jthornton> I just have a micro switch on my plasma for a probe input but it is just for Z
[18:10:02] <archivist> mutilator, I would not be buying that one, I would probably make/modify something or buy a second hand one from a famous maker
[18:10:22] <IchGuckLive> Someone shout do a Gui that probes a tool and fills the Tooltable
[18:10:43] <IchGuckLive> Python pyvcp or in glade3
[18:10:50] <archivist> I do have one but it is mounted on a 50 size taper and too big for me
[18:10:51] <jthornton> is there anything needed besides the probe to get a reliable input?
[18:12:15] <archivist> a good concentric mount
[18:12:49] <Loetmichel> re @ home
[18:13:01] <archivist> I dont see any adjustment on that ebay one to correct it
[18:13:58] <jthornton> to center the probe tip?
[18:14:17] <archivist> yes
[18:15:19] <archivist> and seeing it has a wire, one cannot spin it to remove that error
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[18:29:57] <archivist> mutilator, my comments are related to side probing not vertical which you are needing so that may be ok but home brew may be as good for that purpose
[18:32:57] <L84Supper> http://www.surpluscenter.com/home.asp some deals on motors and power transmission parts if you're in the US
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[18:35:15] <IchGuckLive> Where is a good place to buy Servos for Europ
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[18:52:15] <archivist> andypugh, did you bring a larger charger home today :)
[18:52:35] <andypugh> I brought my motorbike home today.
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[18:53:40] <andypugh> IchGuckLive: I have always had decent service from Zapp: http://www.zappautomation.co.uk/servo-systems-230v-servo-systems-c-36_118.html?osCsid=00e7b96c427d7e3fca4ba44d91f0b09b
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[18:53:58] <andypugh> I have not, however, ever used their servos.
[18:55:09] <archivist> they were missing (empty stand) at the model engineer exhibition a couple of weeks ago
[18:55:27] <andypugh> Hmm, maybe not a great sign.
[18:56:20] <archivist> Are Euro trade was missing too, but the owner was there and I had a chat
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[18:57:14] <archivist> the man running that show is expensive, I expect the stands are over priced
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[19:04:33] <IchGuckLive> andypugh: thanks
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[19:09:13] <andypugh> IchGuckLive: I have had stuff from these guys too: http://motioncontrolproducts.co.uk/products/15/52/cnc_brushless_servo_kit_(from_100w-400w)/
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[19:13:32] <IchGuckLive> andypugh: on the DC servos i got a question are they controling them selfs or only reporting a failue
[19:14:01] <andypugh> I don't understand the question
[19:14:41] <IchGuckLive> the DC servo systems got a Encoder there are also leadshine drives for this
[19:14:59] <IchGuckLive> oh maybe im wrong as i never used this bevor
[19:15:12] <IchGuckLive> they need a encoder to get the pulses back
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[19:15:26] <andypugh> It depends.
[19:16:25] <andypugh> Different systems work different ways. The DMM motors, for example, use an absolute magnetic encoder that only their drive understands, but then the drive sends out ABZ quadrature for the computer to eat.
[19:17:42] <IchGuckLive> ok i see lots of money to spend lots of things to learn
[19:18:59] <IchGuckLive> by thanks for the info
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[19:45:18] <mrsun> ballscrews in woodworking stuff, how does that go ? thinking dust etc =)
[19:45:48] <Loetmichel> mrsun: of you have felt gaskets in front and after the nur: why not?
[19:45:51] <Loetmichel> nut
[19:46:07] <mrsun> so i would have to make felt gaskets then ? :P
[19:46:31] <Loetmichel> some ballscrews already have something like it
[19:46:37] <mrsun> sitting here thinking of blowing half of the money i got on buying some ballscrews, so i can get a start on a cnc machine :P
[19:46:47] <mrsun> small one but still
[19:47:01] <mrsun> as long asi do not have any expensive parts i will never get to making one :P
[19:47:17] <Loetmichel> mrsun: for starters;: use acme screws and 2 delrin nuts per axis
[19:47:28] <Loetmichel> to make them slack free
[19:47:39] <mrsun> problem is cutting the freakin nuts :P
[19:47:46] <Loetmichel> that can run dry and dont attract dust
[19:48:05] <Loetmichel> mrsun: you can buy them readily done
[19:48:15] <mrsun> Loetmichel, im in sweden
[19:48:21] <mrsun> nothing is easy to buy in this freakin country
[19:48:21] <Loetmichel> so what?
[19:48:28] <mrsun> i find everything everywhere else
[19:48:35] <mrsun> and get slapped with shipping for 5x the price of the stuff
[19:48:38] <Loetmichel> doesent maedler.de deliver to sweden?
[19:52:07] <mrsun> hmm
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[19:59:22] <mrsun> half the price, and long pieces of screws, but thats not including any kind of endsupports etc
[19:59:49] <mrsun> and not shipping
[20:01:01] <Loetmichel> ebay?
[20:01:39] <mrsun> Loetmichel, that was the maedler.de ... the trapez screws
[20:01:52] <Loetmichel> i know
[20:01:56] <mrsun> 1134sek without shipping dont know what shipping it was
[20:02:20] <Loetmichel> i meant: search on ebay. i cant belive that in sweden are no cnc suppliers on ebay
[20:02:32] <mrsun> ebay, ballscrews with endsupports already machined, 2400sek
[20:02:46] <mrsun> Loetmichel, sweden sucks
[20:04:35] <Loetmichel> mrsun: i can buy the acme screws and nylon/delrin/steel/brass nuts for the usual sizes in a smal screw/tools shop around the corner (2km) ...
[20:05:14] <PCW> I'll take Sweden yeah yeah yeah
[20:05:14] <Loetmichel> and they even lend me a angle grinder/saw to cut the 3m screws to car size ;-)
[20:07:30] <Loetmichel> mrsun: i was only in varberg and ystadt in my navy times
[20:07:45] <Loetmichel> but i met some nice ladies ;-)
[20:08:15] <mrsun> i wish i could meet some nice ladies :P
[20:08:43] <mrsun> would rather blow my money on them then one some futile dream :P
[20:08:45] <Loetmichel> (german navy uniform and a bottle of remy martin opens some doors ;-)
[20:09:37] <Loetmichel> ... an hearts ;-)
[20:09:55] <mrsun> i cant even talk to women when im drunk so :P
[20:10:10] <mrsun> no amount of uniform would fix that
[20:10:49] <Loetmichel> mrsun: you are not used to "german marine" amounts of alc.
[20:11:10] <mrsun> wellw hat fun is it if im so drunk i cant remember ?
[20:11:24] <mrsun> and maybe not even get it up if i get lucky
[20:11:29] <Loetmichel> i cound walk a straight line with my eyes closed with half the bottle of "schnaps" inside me... ;-)
[20:13:07] <Loetmichel> i remember sitting on freewatch inside the ship (in the harbor of kirstiansand), waiting for my second watch this day to begin
[20:14:31] <Loetmichel> ... Kaleu (ships "captain") comes inside, looks around... "was los jung, kein bier aufm tisch? schmeiss mal ne runde!" ("whats the matter, boy? no beer on the table? get some out for you and me!"
[20:15:31] <Loetmichel> ... he definetly had known that my next shift was only an hour away ;-)
[20:25:00] <andypugh> A friend of mine managed to get thrown out of the navy for drinking too much. But I think he tried very hard.
[20:26:52] <Loetmichel> hrhr
[20:29:56] <Loetmichel> i remember a birtday party in the 22men-deck. the morning after we recognized we had cleared out the whole customs storeroom... 40 boxes (a 20* 0,5L) becks beer ;-)
[20:30:35] <andypugh> But, it's not big and it's not clever..
[20:30:35] <Loetmichel> was a very dry journey home, being in denmark at that time ;-)
[20:31:34] <Loetmichel> andypugh: we were young and we were german soldiers ;-)
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[22:16:03] <DJ9DJ> gn8
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[22:23:28] <L84Supper> http://www.dumpstercnc.com/ fair priced ACME anti-lash flange nuts, couplings and collars
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[22:40:41] <andypugh> Are the springs in torsion? I can't imagine any other way for it to work
[22:41:44] <L84Supper> http://www.dumpstercnc.com/datasheets/datasheet_ableadnuts.pdf
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[22:42:58] <andypugh> Aha! I see now what the spring does. I don't see how that compensates wear. :-)
[22:43:30] <andypugh> (OK, it does with a tapered thread-form, but not a parallel one)
[22:43:34] <L84Supper> should work well enough at my high speeds (6mm/m)
[22:45:51] <L84Supper> they may have done a poor job of explaining them
[22:46:31] <L84Supper> I'll see when they show up, a delrin nut lasts long enough for my app
[22:50:12] <L84Supper> I'm really surprised by how hard it is to find ACME screws and nuts in stock
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[22:52:33] <JT-Shop> in the USA?
[22:55:03] <L84Supper> JT-Shop: yes
[22:55:17] <JT-Shop> mcmaster carr has it in stock
[22:56:12] <L84Supper> no delrin or acetal flange nuts
[22:57:14] <L84Supper> oh sorry they had PET nuts
[22:58:24] <L84Supper> ~$65 for the nut and flange ea
[22:58:53] <L84Supper> Reid tool supply had a few as well
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[23:37:03] <andypugh> If this didn't have the "Axminster" Logo I would think it was very nice: http://www.ebay.co.uk/itm/BS-0-DIVIDING-HEAD-INC-TAILSTOCK-tools-VERTEX-/230877716193
[23:43:43] <JT-Shop> does it hold a collet?
[23:43:56] <andypugh> No, that's a screw-thread protector
[23:44:15] <andypugh> It has the right thread for a Myford chuck, but comes with a backplate
[23:44:51] <andypugh> Google image search for Vertex BS0 shows a lot of them, and £150 is fairly cheap.
[23:45:16] <andypugh> There is a picture of a motorised one on the divisionmaster web page
[23:45:50] <JT-Shop> ok I see you mount a chuck to the threaded part
[23:46:10] <andypugh> It looks like an unusually stiff tilt mechanism. But motorsing that part would be hard. I don't anticipate doing 5-axis work though
[23:47:12] <andypugh> I will watch it, it's pretty close to home.