Re: [Emc-users] Turning Polygons on Lathe
On Tuesday 12 February 2008, Ian W. Wright wrote: On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Gene Heskett wrote: Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. Hi Gene, I'm not sure that the cutting forces would be very great at all. If you look closely at the tools you will see that the front face is dished in creating a cutting edge around the front of the tool. So, coupled with the 1 degree clearance angle of the tool axis and the tool being smaller than the hole its cutting for internal splines etc., the cutting action is that of a knife. It would appear that the whole secret of this is in producing the tools with this sharp cutting edge at the front and then choosing one with an appropriate shape and relative size to the work. I think its a bit like the old 'Spirograph' toy Interesting for sure Ian, but I was born just north of Missouri and I think I'd have to see it done on simpler machinery than that was. :) -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) I don't deserve this award, but I have arthritis and I don't deserve that either. -- Jack Benny - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Tuesday 12 February 2008, Brian Pitt wrote: On Monday 11 February 2008 15:14, Gene Heskett wrote: On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. with the angular offset and shearing action of the cutter they take allot less push than you'd think But its a full splines depth of cut in one pass, just with the force concentrated on one tooth at a time. You could still be pushing thru an 1/8 or more of steel per spline depending on how deep they were. but you have no controll of the orientation That could be a problem where one would need timing accuracy. That would be curable with cnc synch between spindles, but there isn't any in that setup. and you cant work behind a shoulder or swallow more than an inch or so of the part then again the polygon head wont do splines ,keyseats or internal work a few years ago someone made a CNC mill that would drill square holes like this http://upper.us.edu/faculty/smith/reuleaux.htm by syncing the table motion to the spindle position Neat, but would need way faster tables than I have. I'm sure someone somewhere has a use for that feature but I think they did it mainly to show off how fast the machine was ;) There is more than a little bit of the watch this, see what I can do available on the net these days, unforch a lot of it shot by folks with little knowledge of how to shoot such a project, so it isn't well done as far as seeing how it was done, most all of that is lost in the blur of the motion. Brian - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) I'm not proud. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
The hard part for them was finding someone who could read the broken english (chinglish, I assume) text with unaccented american english and avoid laughing. Ken - Original Message - From: Kirk Wallace [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Friday, February 08, 2008 9:15 PM Subject: [Emc-users] Turning Polygons on Lathe I saw this on YouTube: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related Who is volunteering to do the kins for this? -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Monday 11 February 2008 15:14, Gene Heskett wrote: On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. with the angular offset and shearing action of the cutter they take allot less push than you'd think but you have no controll of the orientation and you cant work behind a shoulder or swallow more than an inch or so of the part then again the polygon head wont do splines ,keyseats or internal work a few years ago someone made a CNC mill that would drill square holes like this http://upper.us.edu/faculty/smith/reuleaux.htm by syncing the table motion to the spindle position I'm sure someone somewhere has a use for that feature but I think they did it mainly to show off how fast the machine was ;) Brian - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) UNIX is many things to many people, but it's never been everything to anybody. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related I notice thay didn't show the cutting tool clearly. I would have liked to see that. Here is an animation that shows the process: http://video.google.com/videoplay?docid=-7831550688320827327 The cutting tooth actually traces out an elliptical path, but it's so close to a straight line that it doesn't matter for most applications. The larger the cutter radius relative to the polygon, the straighter it will be. The number of sides is the product of the gear ratio and the number of teeth on the cutter. here's some more info from the same people: http://www.remsales.com/pages_blocks_v3_exp/images/links/POLYGON_MILLING_[Read-Only].pdf enjoy! -fenn - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
Well, I could be absolutely crazy but I got the impression it was a matter of precise and repeatable synchronization. I can visualize it but have not drawn it out yet. Dave On Feb 9, 2008, at 10:58 AM, Jon Elson wrote: Kirk Wallace wrote: I saw this on YouTube: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related Who is volunteering to do the kins for this? I notice thay didn't show the cutting tool clearly. I would have liked to see that. Jon -- --- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Saturday 09 February 2008, ben lipkowitz wrote: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related I notice thay didn't show the cutting tool clearly. I would have liked to see that. Here is an animation that shows the process: http://video.google.com/videoplay?docid=-7831550688320827327 Nice link. That EMCO 5 is very badly programmed however. Leaving a full cut at the base of the thread because the bit doesn't retract is unforgivably weak. See http://video.google.com/videoplay?docid=5486341291050459833 The cutting tooth actually traces out an elliptical path, but it's so close to a straight line that it doesn't matter for most applications. The larger the cutter radius relative to the polygon, the straighter it will be. The number of sides is the product of the gear ratio and the number of teeth on the cutter. here's some more info from the same people: http://www.remsales.com/pages_blocks_v3_exp/images/links/POLYGON_MILLING_[Re ad-Only].pdf enjoy! -fenn - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Mandrell: You know what I think? Doctor: Ah, ah that's a catch question. With a brain your size you don't think, right? -- Dr. Who - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Sat, 2008-02-09 at 12:58 -0600, Jon Elson wrote: Kirk Wallace wrote: I saw this on YouTube: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related Who is volunteering to do the kins for this? I notice thay didn't show the cutting tool clearly. I would have liked to see that. Jon I'm not sure what you mean, but I think it is one or more single point tools mounted on a secondary spindle. I am guessing the spindles are synchronized in a way that has the tool tip(s) describing a line relative to the main spindle. I tried to visualize myself riding on the main spindle and watching the machine and secondary spindle move around me, but I fell down and hurt myself. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Turning Polygons on Lathe
I saw this on YouTube: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related Who is volunteering to do the kins for this? -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Turning Polygons on Lathe
On Fri, Feb 08, 2008 at 06:15:14PM -0800, Kirk Wallace wrote: I saw this on YouTube: http://www.youtube.com/watch?v=oGq-9NNmr3ofeature=related Who is volunteering to do the kins for this? I think the software is not hard. http://www.linuxcnc.org/docs/html/man/man9/encoder_ratio.9.html Really this might be the basic idea. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
