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Re: basic lathe tooling queston
dc7drvr
It is not a problem to turn down barrel blanks. Some of the ones I
purchase are a couple of inches in diameter for a .357 hole. They are oversize so the builder has the option of a bull barrel or turning it down to normal sizes to match the guns barrel shape. --- In 7x12minilathe@..., "Ian Foster" <fosterscons@...> wrote: tool grinding. This wil give you an insight into tool shapes, thingslike rakes and clearance angles. Armed with this knowledge you can fiteach tool in your tool post and see what it provides for rake, clearanceand cutting angle, then you will know what they do and how to use them.a barrel. It most likely been forged and the outer surface will betough to cut into. Your machining it will release stresses which may warpit. My Father was into competition target shooting and used to spendlots of time making sure the casing etc didn't foul the barrel as itflexed whilst firing. If I recall "grouping" of shots was most important. |
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Re: First prototype of the laser edge/center finder done!
Vikki,
Rather than trying to drill a pin hole in a thicker piece, glue some al. foil on BOTH sides of a thick washer. Mount a straight pin in your drill press (or mill) and bring it down on the washer/al. foil to poke a tiny hole through both layers of foil. This may give you the same effect as a thicker waveguide. Rance --- In 7x12minilathe@..., Victoria Welch wrote: On Saturday 14 April 2007, born4something wrote:I've--- In 7x12minilathe@..., Victoria Welch <wrlabs@>:-) I was wondering just how to drill something out to ~650nM :-). got some *tiny* PCB drils but I don't think those are even in the |
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Re: Database of past messages
Tony Smith
What a lot of hoo-ha about nothing, as the saying goes. 99.99% of the
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message on these boards really aren't worth saving, including this entire thread. Having a decent search interface, or an index, or perhaps a list of 'best of' threads would be nice. However, if you were going to do that, you might as well do what other have done, and call it a book. As far as who owns copyright, you do for your messages. By posting you grant Yahoo the right to publish them (with no royalties) or do whatever they like until you or they delete them. Yahoo doesn't really care (much) about a 3rd party setting up a database, so long as they don't pretend to be Yahoo, claim affiliation etc. The copyright & TOS (no, not Star Trek) pages are linked off the main groups page. If a poster has a problem with the 3rd party database, then it's between them. Personally, if you feel that your messages are so valuable that you'd be willing to fire off C&D letters or start lawsuits, perhaps you should stop posting. 'rroll99' has exactly 3 messages in my inbox, the one complaining about copyright, one asking for a book suggestion, and one saying thanks re the book. Not worth getting excited about. Perhaps I can sue all the other members of this group for having my copyrighted messages on their computer systems. You can all sue me in return. Besides, the whole point is spreading knowledge, and anything on this lists would be fairly well known anyway. I doubt anything new & earthshattering would appear on a message board that is mainly "I'm a newbie, how do I..." posts. There a few websites that have cherrypicked lists for useful messages, see for a example. It just mangles the emails a bit. Look at all the Usenet stuff, it eventually all ended up on Google. Useful? Maybe. Go write a book instead. Taking from many is called research, isn't it? Plus you'll get a pat on the back, and not (as many) accusations of copyright theft. Tony -----Original Message----- |
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Re: Database of past messages
Druid Noibn
Hi Patrice L.,
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Good points and well-taken. I am pleased to hear that you removed the "copyright" from your site - however, as with the best of intentions, this generates another problem and a violation of the copyright law - your previous posting of "copyright" was a also a violation, called theft. The very issuance of the instrument is a copyright; however the courts will not hear a case unless it is registered. By not citing the copyright holder or the original author(s) you are placing in public domain work in which you might not have the authority to do so. Next, has Yahoo released any and all copyrights to the moderators and/or the original authors save for the logo and possibly the "look and feel?" Alternate view - The authors, by posting have gifted their work as "public domain" in which case the public at-large have full use of it. However, it does not grant the copyright. As soon as any commercial benefit is made, the situation is complicated. Commercial use is sometimes a fine hair to split under the ¡°Fair Use¡± principle. Most often restricted to educational institutions - If one were to copy a document for a class, a reasonable copying fee is permitted. A charge greater than this is deemed commercial and would be seen as unfair and potentially theft. So while creating a compendium of postings is one of good intentions, it does have ramifications due to the ne¡¯re-do-wells who benefited from the work of others. If you elect to otherwise post materials presented by others, 1) permission is required and 2) full citation to the copyright owner (saving this, the original author) must be stated. Next disclosing information from a ¡°members-only¡± group (one needs to be a member to post) is not a good idea. Your good intentions are appreciated, but your decision not to proceed is likely the best. Take care, DBN Patrice L <strempe4@...> wrote: Let me address what I can. 1) I will add a reference to the Yahoo group. Not sure why I did not do it but I see how that may be a good idea. 2) I removed the copyright at the bottom of these pages (a couple of days ago actually). I had it on all my website. Never thought to copyrights those for myself. 3) I've removed much of the identification as well as emails for fear of revealing too much personal information. 4) I've added the adds recently to see if this was something that could generate revenue to help with the cost of website and to eventually upgrade so that I could add pictures on there. Anyway, I am telling you that I wanted to do this to give back, having received lots of help myself. But you don't know me and I have no way to prove it to you or others. I never had anything but good words from the Southbend group and thought it would be a good idea. Guess not. SO don't worry, I won't make it. Patrice -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of rroll99 Sent: Saturday, April 14, 2007 6:27 PM To: 7x12minilathe@... Subject: [7x12minilathe] Re: Database of past messages I'm sorry, but I have to object. What EXACTLY are you seeking permission to do? I don't know what copyrights we give up to Yahoo Groups when we post here, but I wish to retain any rights that I still have and I don't want anything that I write on your web site. I wouldn't care as much if you clearly identified on your web site that the source of your content is the South Bend Lathe Group, but you haven't done that. There isn't even a link to the group. You've also stripped almost all information that could identify the authors of the messages. And you've prominently displayed your own copyright notices, which imply that you own the copyrights to stuff that you don't have the right to copyright. Finally, you're displaying ads on your site, which means you've at least considered trying to make money from other people's writing. Your web site also "cluttered up" a Google search that I did the other day with multiple hits that were basically useless. The answer that I was looking for might have been somewhere on your site but it would have been difficult to find because your "database" is more about quantity than quality. Quite frankly, it's not very much of an improvement over the group's built-in search function. If you're wondering why this is an issue with me, it's because I spent twelve years operating a web site/BBS as a free public service to promote general aviation, and that experience was ruined by those who felt that they could take my work without my permission or without giving me credit as the source. I think that if you want to put what you learn here on your web site, then you need to write it in your own words. --- In 7x12minilathe@..., "borenson444" <strempe4@...> wrote: members. Be sure to check out for small mills and lathes. Yahoo! Groups Links __________ NOD32 2188 (20070414) Information __________ This message was checked by NOD32 antivirus system. --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. |
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Re: Database of past messages
G'day Patrice.
Thanks for getting on top of the problems. I have no objection to your copyrighting the data base but not the content, that belongs to the writers. You need to protect yourself and the writers from unscrupulous opportunists. It is up to this groups MODERATORS to comment. They are the persons who hold this group together so that discussions on machining are not diluted with pseudo polital debate? or adverts for ladies of doubtful vitue or products not needed by those in a healthy sexual relationship. The moderation means that the pearls of wisdom are reasonably accessible. Please get the moderators response. One good turn deserves another. Regards, Ian --- In 7x12minilathe@..., Patrice L <strempe4@...> wrote: not do it but I see how that may be a good idea.of days ago actually). I had it on all my website. Never thought tocopyrights those for myself.fear of revealing too much personal information.could generate revenue to help with the cost of website and to eventuallyupgrade so that I could add pictures on there.having received lots of help myself. But you don't know me and I have noway to prove it to you or others.thought it would be a good idea. Guess not. SO don't worry, I won't make it. |
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Re: Database of past messages
Let me address what I can.
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1) I will add a reference to the Yahoo group. Not sure why I did not do it but I see how that may be a good idea. 2) I removed the copyright at the bottom of these pages (a couple of days ago actually). I had it on all my website. Never thought to copyrights those for myself. 3) I've removed much of the identification as well as emails for fear of revealing too much personal information. 4) I've added the adds recently to see if this was something that could generate revenue to help with the cost of website and to eventually upgrade so that I could add pictures on there. Anyway, I am telling you that I wanted to do this to give back, having received lots of help myself. But you don't know me and I have no way to prove it to you or others. I never had anything but good words from the Southbend group and thought it would be a good idea. Guess not. SO don't worry, I won't make it. Patrice -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of rroll99 Sent: Saturday, April 14, 2007 6:27 PM To: 7x12minilathe@... Subject: [7x12minilathe] Re: Database of past messages I'm sorry, but I have to object. What EXACTLY are you seeking permission to do? I don't know what copyrights we give up to Yahoo Groups when we post here, but I wish to retain any rights that I still have and I don't want anything that I write on your web site. I wouldn't care as much if you clearly identified on your web site that the source of your content is the South Bend Lathe Group, but you haven't done that. There isn't even a link to the group. You've also stripped almost all information that could identify the authors of the messages. And you've prominently displayed your own copyright notices, which imply that you own the copyrights to stuff that you don't have the right to copyright. Finally, you're displaying ads on your site, which means you've at least considered trying to make money from other people's writing. Your web site also "cluttered up" a Google search that I did the other day with multiple hits that were basically useless. The answer that I was looking for might have been somewhere on your site but it would have been difficult to find because your "database" is more about quantity than quality. Quite frankly, it's not very much of an improvement over the group's built-in search function. If you're wondering why this is an issue with me, it's because I spent twelve years operating a web site/BBS as a free public service to promote general aviation, and that experience was ruined by those who felt that they could take my work without my permission or without giving me credit as the source. I think that if you want to put what you learn here on your web site, then you need to write it in your own words. --- In 7x12minilathe@..., "borenson444" <strempe4@...> wrote: members.
Be sure to check out for small mills and lathes. Yahoo! Groups Links __________ NOD32 2188 (20070414) Information __________ This message was checked by NOD32 antivirus system. |
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cnc 8x12/14 lathe up and running!
hi all-
the cnc 8x12/14 prototype's finished and working under power. we still need to familiarlize ourselves with the control software, but so far so good. we started turning some acetal/delrin rod as a start. we're now off to getting the spindle controlled via software as well :) <> or <> thanks for listening! david -- Free photo storage for hobbyists - share pics! <> MetalWorkingFAQ.NET - Over 50 content sites! <> CNC, Plans/Kits, 8x12 Lathe, Mini-Mill, How-Tos <> Sieg X3/Super X3 Mill Information, HF/Enco Coupons <> |
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Re: basic lathe tooling queston
G'day Harley.
I suggest you look up minilathe.com and the article on tools and tool grinding. This wil give you an insight into tool shapes, things like rakes and clearance angles. Armed with this knowledge you can fit each tool in your tool post and see what it provides for rake, clearance and cutting angle, then you will know what they do and how to use them. I am not into weaponry but I would hesitate to machine material off a barrel. It most likely been forged and the outer surface will be tough to cut into. Your machining it will release stresses which may warp it. My Father was into competition target shooting and used to spend lots of time making sure the casing etc didn't foul the barrel as it flexed whilst firing. If I recall "grouping" of shots was most important. One good turn deserves another. Regards, Ian |
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Re: First prototype of the laser edge/center finder done!
tbarker_xxx
There seems to be some engineering/physicists following this thread
so maybe somebody can answer a question I've had about laser edge locators. I understand that they are just producing a small spot and depending upon the user's eye to do the alignment, but that does not seem to take full advantage of the characteristics of a laser. Why are these units not taking the reflected image and splitting it so that they can form an interference pattern from the two sides of the beam? Since the travel distance as the beam moves onto an edge would be different the split beam should show very noticable interference (assuming of course that the difference in travel distance is not a multiple of the wavelenght and that seems unlikely). To me it seems like that approach would lead to a highly repeatable precision-edge- detection. I've thought a bit about what optics might be required and it does not seem like it would be too hard to mass produce, although it is probable something that would a bit hard to prototype in a home shop. --- In 7x12minilathe@..., Victoria Welch <wrlabs@...> wrote: unexpectedly. moreWith that in mind, I need a few more handles and to refit some anothersecurely!I drilled out the shank in two steps, deep for the thin end and at the top for the big end near the file itself. I don't know ifthat helped or that cheap wood is just so springy that it comes down onthe shank tightly?!? Short of pounding it off with a hammer of somesort, I think it is there to stay.workbench. Maybe there is a place for crap wood ;-)?and Derek Bok |
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basic lathe tooling queston
harleyknall
I am new, I beleive bit C is fo threading, what are the other bits
for? I with to turn down the outside diameter of some rifle barrels. I assume one and is for cutting left to right, and the other is for right to left. Which is which? And what is the diferance between the steep and shallow anle bits? Please use the labeled piture to explain in detail. THANKS!!! action=view¤t=lathebits.jpg |
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Re: Database of past messages
G'day Patrice & rroll99.
Whilst I embrace Patrice's idea rroll99's post brings to the surface some latent concerns I felt when looking atr the data base. To get something off my chest. Patrice if you are looking to profit from the collective "wisdom" of these groups then I direct you to "depart, urinating as you go". That said; if Patrice is genuinely trying to provide the lathe community a service then his copyrighting of the data base is a necessary protection from those with less scruples putting the efforts on a CD and hawking them around eBay; it is happening. The source of material must be acknowledged, it is not too much for a community "Cook Book". The material must remain where it began, free in the PUBLIC DOMAIN. Regarding acknowledgement, some of our handles are a bit impersonal. Who are you "rroll99"? One good turn deserves another. Regards, Ian --- In 7x12minilathe@..., "rroll99" <rroll99@...> wrote: you haven't done that. There isn't even a link to the group. You'vealso stripped almost all information that could identify the authors ofthe messages. And you've prominently displayed your own copyright |
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Re: First prototype of the laser edge/center finder done!
Malcolm Parker-Lisberg
Synthetic sapphire balls are used for precision ball bearings. For one example see <>
They are not expensive only $1 to $2 each. Victoria Welch <wrlabs@...> wrote: On Saturday 14 April 2007, Malcolm Parker-Lisberg wrote: > The saphire ball bearing makes an excellent lens for a diode laser. I suppose so, but outside of my roomie and her bead mill I have no idea were to even start looking for something like that. Would probably also add considerable value to a $1 laser pointer too :-)! Thanks & take care, Vikki. -- Victoria Welch, WV9K/7 "Experience should teach us to be most on our guard to protect liberty when the government's purposes are beneficient . . . the greatest dangers to liberty lurk in insidious encroachment by men of zeal, well meaning but without understanding." -- Justice Louis Brandeis --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. |
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Re: Database of past messages
I'm sorry, but I have to object.
What EXACTLY are you seeking permission to do? I don't know what copyrights we give up to Yahoo Groups when we post here, but I wish to retain any rights that I still have and I don't want anything that I write on your web site. I wouldn't care as much if you clearly identified on your web site that the source of your content is the South Bend Lathe Group, but you haven't done that. There isn't even a link to the group. You've also stripped almost all information that could identify the authors of the messages. And you've prominently displayed your own copyright notices, which imply that you own the copyrights to stuff that you don't have the right to copyright. Finally, you're displaying ads on your site, which means you've at least considered trying to make money from other people's writing. Your web site also "cluttered up" a Google search that I did the other day with multiple hits that were basically useless. The answer that I was looking for might have been somewhere on your site but it would have been difficult to find because your "database" is more about quantity than quality. Quite frankly, it's not very much of an improvement over the group's built-in search function. If you're wondering why this is an issue with me, it's because I spent twelve years operating a web site/BBS as a free public service to promote general aviation, and that experience was ruined by those who felt that they could take my work without my permission or without giving me credit as the source. I think that if you want to put what you learn here on your web site, then you need to write it in your own words. --- In 7x12minilathe@..., "borenson444" <strempe4@...> wrote: members.
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, Malcolm Parker-Lisberg wrote:
The saphire ball bearing makes an excellent lens for a diode laser.I suppose so, but outside of my roomie and her bead mill I have no idea were to even start looking for something like that. Would probably also add considerable value to a $1 laser pointer too :-)! Thanks & take care, Vikki. -- Victoria Welch, WV9K/7 "Experience should teach us to be most on our guard to protect liberty when the government's purposes are beneficient . . . the greatest dangers to liberty lurk in insidious encroachment by men of zeal, well meaning but without understanding." -- Justice Louis Brandeis |
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Re: First prototype of the laser edge/center finder done!
Malcolm Parker-Lisberg
The saphire ball bearing makes an excellent lens for a diode laser.
Victoria Welch <wrlabs@...> wrote: On Saturday 14 April 2007, born4something wrote: > --- In 7x12minilathe@..., Victoria Welch <wrlabs@...> > > wrote: > > Just wondering if thinking of this as a waveguide (as in microwave > > radio) might be appropriate?!? Hummm.... > > Hi Vikki, > > It is a waveguide but I doubt you'll drill a hole fine enough that > you need to design it as such. While ever your tolerances exceed a > wavelength you won't be in the race! :-) I was wondering just how to drill something out to ~650nM :-). I've got some *tiny* PCB drils but I don't think those are even in the running :-). > Your comments about being able to achieve a very good pin spot at any > given distance but circles elsewhere make me think your source is off > axis and you are projecting cones of light. You can set the > convergent apex of the cone but it's still a cone. I haven't been > following all of this thread in detail but does that gel? Yes Sir, it does. For $1 each including batteries (some ~$4, some ~$7) they are all crappy in terms of beam and every one is noticeably different in the spot it produces. Just how good those little plastic collimating lenses are is a whole different story. I'd bet that the laser LEDs that go into those thing are not pick of the production run and the most that can be said about them is that they do emit from someplace on the device and at varying intensity as well. Sorta like antenna work, So many variables :-). Will be interesting to see what this one from Micro-Mark is like. Take care, Vikki. -- Victoria Welch, WV9K/7 "Certainly the game is rigged. Don't let that stop you; if you don't bet, you can't win." --Lazarus Long --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos. |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, born4something wrote:
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>:-) I was wondering just how to drill something out to ~650nM :-). I've got some *tiny* PCB drils but I don't think those are even in the running :-). Your comments about being able to achieve a very good pin spot at anyYes Sir, it does. For $1 each including batteries (some ~$4, some ~$7) they are all crappy in terms of beam and every one is noticeably different in the spot it produces. Just how good those little plastic collimating lenses are is a whole different story. I'd bet that the laser LEDs that go into those thing are not pick of the production run and the most that can be said about them is that they do emit from someplace on the device and at varying intensity as well. Sorta like antenna work, So many variables :-). Will be interesting to see what this one from Micro-Mark is like. Take care, Vikki. -- Victoria Welch, WV9K/7 "Certainly the game is rigged. Don't let that stop you; if you don't bet, you can't win." --Lazarus Long |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, born4something wrote:
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>I drilled out the shank in two steps, deep for the thin end and another at the top for the big end near the file itself. I don't know if that helped or that cheap wood is just so springy that it comes down on the shank tightly?!? Short of pounding it off with a hammer of some sort, I think it is there to stay. Just put it over the file shank and popped it down on the workbench. Maybe there is a place for crap wood ;-)? Take care, Vikki (pleased not be be laughed at :-). -- Victoria Welch, WV9K/7 If you think education is expensive, try ignorance" --Andy McIntyre and Derek Bok |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, born4something wrote:
--- In 7x12minilathe@..., Victoria Welch <wrlabs@...>Dunno, apparently not $28.90 ($19.95+$8.95 shipping). They are in New Jersey so WA state is not all that much closer than Oz ;-). Never mind, you'll have posted all the neat extra tricks by the timeHopefully it will be simple enough that there won't be any ;-). Probably the one I am most interested in with this thing is setting the lathe tools on center and using it to adjust the tailstock. The mill stuff is just gravy :-). Should be a lot of fun and if it works at all, a lot quicker. Fortunately I just ordered a full set of MT2 collets so I won't have to depend on the supplied drill chuck for the mill. Should be fun under any conditions, plus it might give me ideas! Take care, Vikki. -- Victoria Welch, WV9K/7 "The best minds are not in government. If any were, business would hire them away." - Ronald Reagan |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, Ian Foster wrote:
G'day John & Vikki et al.Hey! I found the link, I want my cut too </politician> :-). LOL! Take care, Vikki. -- Victoria Welch, WV9K/7 "Life has meaning only in the struggle. Triumph or defeat is in the hands of the gods...so let us celebrate the struggle!" -- Swahili Warrior Song |
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Re: First prototype of the laser edge/center finder done!
Victoria Welch
On Saturday 14 April 2007, Clint D wrote:
VickieGlad to help! I knew I had seen two different ones of these things, but I wasn't sure where, I thought it was MM, but I spent some time rooting around different sites and then at MM and am still not sure how I found it :-). Glad I persisted though :-)! Take care, Vikki. -- Victoria Welch, WV9K/7 'Never argue with an idiot. They drag you down to their level then beat you with experience.' --Cecil Bayona |
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