Re: [Emc-users] Tapping G code
On Thu, 15 Aug 2013 07:25:44 +0200, you wrote: Now would that be a 50% or 75% thread. JT's tables needs both. One for softer metals and the other for the harder stuff. Metric threads are usually specified as .65H I've never seen any deviation in percentage diameter specified for softer or harder materials for drilled and tapped holes, and as most drills drill oversize anyway it's a moot point. You would just use tables or diameter - pitch. For softer or harder materials you just use the appropriate diameter/pitch faster. If you are machining threads on a lathe, it's a different story. Using the correct form inserts you can get up towards 90%, if you needed threads that close in tolerance you would be reaming or boring the holes and tables are of no value. You would use CAM or get the info from Machinery's Handbook etc. Steve Blackmore -- -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 15 August 2013 06:25, Marius Liebenberg mar...@mastercut.co.za wrote: nominal thread diameter - pitch. Now would that be a 50% or 75% thread. 75%. (50% threads are a deviation from the standard) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
I have googled for the forumulas in the past but for this project I just used this chart http://littlemachineshop.com/Reference/TapDrillSizes.pdf JT On 8/15/2013 12:22 AM, Marius Liebenberg wrote: @ Greg I need to know how to do it. Otherwise I have learned nothing here. And if I have learned nothing I can teach nothing. :) On 2013/08/15 03:02 AM, Gregg Eshelman wrote: On Wed, 8/14/13, Marius Liebenberg mar...@mastercut.co.za wrote: Subject: Re: [Emc-users] Tapping G code To: emc-users@lists.sourceforge.net Date: Wednesday, August 14, 2013, 4:34 AM JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. How about just going to Google and searching for a metric tap drill chart? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 15 August 2013 10:17, andy pugh bodge...@gmail.com wrote: On 15 August 2013 06:25, Marius Liebenberg mar...@mastercut.co.za wrote: nominal thread diameter - pitch. Now would that be a 50% or 75% thread. 75%. (50% threads are a deviation from the standard) By the way, as the ISO metric and ASME / UN thread forms are identical, if you subtract one pitch from the nominal thread diameter you get the (75%) tapping size for those too. Example. 1/2 x 13 = 0.5 - (1/13) = 0.424 = 27/64 or 10.7mm. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 8/15/2013 1:57 AM, Steve Blackmore wrote: On Thu, 15 Aug 2013 07:25:44 +0200, you wrote: Now would that be a 50% or 75% thread. JT's tables needs both. One for softer metals and the other for the harder stuff. Metric threads are usually specified as .65H In the Machinery's Handbook it has charts about various thread limits based on amount of engagement and some text that says In general when the engagement length is one and one half times the nominal diameter a 50 or 55 per cent thread is satisfactory. and it goes on to say a twist drill is a roughing tool and if size matters ream the hole. and it also says that while 60% threads is usually all you need 75% is often used. For example the MH chart shows a 1/4-20 hole size can range from 0.196 to 0.210 depending on the length of engagement. I've never seen any deviation in percentage diameter specified for softer or harder materials for drilled and tapped holes, and as most drills drill oversize anyway it's a moot point. You would just use tables or diameter - pitch. What does the next paragraph mean? For softer or harder materials you just use the appropriate diameter/pitch faster. This is for tapping holes only... If you are machining threads on a lathe, it's a different story. Using the correct form inserts you can get up towards 90%, if you needed threads that close in tolerance you would be reaming or boring the holes and tables are of no value. You would use CAM or get the info from Machinery's Handbook etc. Steve Blackmore -- -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
My unfinished machinist calculator has all the thread formulas built in so you can see by viewing the code what they are. http://www.gnipsel.com/shop/sfc/sfc.xhtml JT On 8/15/2013 12:22 AM, Marius Liebenberg wrote: @ Greg I need to know how to do it. Otherwise I have learned nothing here. And if I have learned nothing I can teach nothing. :) On 2013/08/15 03:02 AM, Gregg Eshelman wrote: On Wed, 8/14/13, Marius Liebenberg mar...@mastercut.co.za wrote: Subject: Re: [Emc-users] Tapping G code To: emc-users@lists.sourceforge.net Date: Wednesday, August 14, 2013, 4:34 AM JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. How about just going to Google and searching for a metric tap drill chart? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
It looks like from further reading in the MH the standard only goes as low as 60% JT On 8/15/2013 4:17 AM, andy pugh wrote: On 15 August 2013 06:25, Marius Liebenberg mar...@mastercut.co.za wrote: nominal thread diameter - pitch. Now would that be a 50% or 75% thread. 75%. (50% threads are a deviation from the standard) -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
According to the MH holes for tapping have a range depending on depth of thread engagement. For Class 1A and 2A they are: up to 1/3D, 1/3D to 2/3D, 2/3D to 1 1/2D, 1 1/2D to 3D. The range covers about 60% to 80% thread depth. Would it be better to just drop the 50% part of the G code calculator and let the savvy look up their hole sizes in MH and just focus on the G code? I'm adding spot drill for Rob and now reaming seems to be something to add... so far using this is faster than using my CAM software for drilling and tapping holes :) JT On 8/14/2013 5:34 AM, Marius Liebenberg wrote: JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Would it be better to just drop the 50% part of the G code calculator and let the savvy look up their hole sizes in MH and just focus on the G code? No! I'm not that savvy... :-) Besides that takes more time.. Dave On 8/15/2013 7:44 AM, John Thornton wrote: According to the MH holes for tapping have a range depending on depth of thread engagement. For Class 1A and 2A they are: up to 1/3D, 1/3D to 2/3D, 2/3D to 1 1/2D, 1 1/2D to 3D. The range covers about 60% to 80% thread depth. Would it be better to just drop the 50% part of the G code calculator and let the savvy look up their hole sizes in MH and just focus on the G code? I'm adding spot drill for Rob and now reaming seems to be something to add... so far using this is faster than using my CAM software for drilling and tapping holes :) JT On 8/14/2013 5:34 AM, Marius Liebenberg wrote: JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On Thu, 2013-08-15 at 09:35 -0400, Dave wrote: Would it be better to just drop the 50% part of the G code calculator and let the savvy look up their hole sizes in MH and just focus on the G code? No! I'm not that savvy... :-) Besides that takes more time.. Dave In general I just take the easy approach and look on my wall chart which assumes 75% thread. If it is non-critical I may go up in hole size 1 or two numbers ( assuming # drills ;-)) If you really have to ream you are probably using forming taps which in the appropriate material really do a nice job. I only worry about the depth vs dia when tapping large holes, eg. .75 and above. Just my low energy (brain) approach to the whole thing. Dave On 8/15/2013 7:44 AM, John Thornton wrote: According to the MH holes for tapping have a range depending on depth of thread engagement. For Class 1A and 2A they are: up to 1/3D, 1/3D to 2/3D, 2/3D to 1 1/2D, 1 1/2D to 3D. The range covers about 60% to 80% thread depth. Would it be better to just drop the 50% part of the G code calculator and let the savvy look up their hole sizes in MH and just focus on the G code? I'm adding spot drill for Rob and now reaming seems to be something to add... so far using this is faster than using my CAM software for drilling and tapping holes :) JT On 8/14/2013 5:34 AM, Marius Liebenberg wrote: JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On Thu, 15 Aug 2013 06:13:15 -0500, you wrote: What does the next paragraph mean? For softer or harder materials you just use the appropriate diameter/pitch faster. A fastener only needs to do the job it's designed to do and/or support the load it's designed to support. For softer materials it may be appropriate to use a coarser pitch thread so you get more depth of tooth in the material, rather than a finer pitch at greater engagement. The only way of working that out correctly is to do the math or use a fastener analysis program. An example from such a program is shown here http://www.boltscience.com/pages/fastexam.htm Unless specified otherwise, standard drill/tap tables get used. Zeus tables are pretty much a workshop must over here. Steve Blackmore -- -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. On 2013/08/13 04:30 PM, John Thornton wrote: Oh I forgot to mention I converted the first line of each type of tap as an example. JT On 8/13/2013 9:03 AM, Dave wrote: Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130813-1, 2013/08/13 Tested on: 2013/08/14 12:34:50 PM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Thanks, but Rob did the conversion last night and now I'm adding metric fine and metric coarse to it. The metric side will need to be checked for accuracy as soon as I'm done. JT On 8/14/2013 5:34 AM, Marius Liebenberg wrote: JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. On 2013/08/13 04:30 PM, John Thornton wrote: Oh I forgot to mention I converted the first line of each type of tap as an example. JT On 8/13/2013 9:03 AM, Dave wrote: Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Ok, good. I will help with checking once you are done. On 2013/08/14 12:47 PM, John Thornton wrote: Thanks, but Rob did the conversion last night and now I'm adding metric fine and metric coarse to it. The metric side will need to be checked for accuracy as soon as I'm done. JT On 8/14/2013 5:34 AM, Marius Liebenberg wrote: JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. On 2013/08/13 04:30 PM, John Thornton wrote: Oh I forgot to mention I converted the first line of each type of tap as an example. JT On 8/13/2013 9:03 AM, Dave wrote: Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130813-1, 2013/08/13 Tested on: 2013/08/14 12:54:32 PM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On Wed, 8/14/13, Marius Liebenberg mar...@mastercut.co.za wrote: Subject: Re: [Emc-users] Tapping G code To: emc-users@lists.sourceforge.net Date: Wednesday, August 14, 2013, 4:34 AM JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. How about just going to Google and searching for a metric tap drill chart? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 15 August 2013 02:02, Gregg Eshelman g_ala...@yahoo.com wrote: How about just going to Google and searching for a metric tap drill chart? It's actually very easy. For a metric thread the tapping drill is the nominal thread diameter - pitch. M6 x 1 ? 5mm tapping drill. M10 x 1.75? 8.2mm tapping drill. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
@ Greg I need to know how to do it. Otherwise I have learned nothing here. And if I have learned nothing I can teach nothing. :) On 2013/08/15 03:02 AM, Gregg Eshelman wrote: On Wed, 8/14/13, Marius Liebenberg mar...@mastercut.co.za wrote: Subject: Re: [Emc-users] Tapping G code To: emc-users@lists.sourceforge.net Date: Wednesday, August 14, 2013, 4:34 AM JT What is the correct way to calculate the drill sizes please. I will do the metric table but I just need to know what is the right way. How about just going to Google and searching for a metric tap drill chart? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130814-1, 2013/08/14 Tested on: 2013/08/15 07:22:08 AM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Now would that be a 50% or 75% thread. JT's tables needs both. One for softer metals and the other for the harder stuff. On 2013/08/15 03:19 AM, andy pugh wrote: On 15 August 2013 02:02, Gregg Eshelman g_ala...@yahoo.com wrote: How about just going to Google and searching for a metric tap drill chart? It's actually very easy. For a metric thread the tapping drill is the nominal thread diameter - pitch. M6 x 1 ? 5mm tapping drill. M10 x 1.75? 8.2mm tapping drill. -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130814-1, 2013/08/14 Tested on: 2013/08/15 07:25:45 AM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
This is the metric dictionary if anyone wants to convert the pitch and
drill sizes to mm
# Metric Drills change inch drills to metric and your set
# tap size, pitch, 75% drill, 75% drill diameter, 50% drill for
steel, 50% dia
self.NF_TapM = {1:'#6-40,0.6350,M2.9,2.9,M3,3.0',
2:'#8-36,0.02778,#29,0.136,#26,0.147',
3:'#10-32,0.03125,#21,0.159,#18,0.169',
4:'#12-28,0.03571,#14,0.182,#10,0.1935',
5:'1/4-28,0.03571,#3,0.213,#1,0.228',
6:'5/16-24,0.04167,I,0.272,9/32,0.2812',
7:'3/8-24,0.4167,Q,0.332,S,0.348',
8:'7/16-20,0.0500,25/64,0.3906,13/32,0.4062',
9:'1/2-20,0.5000,29/64,0.4531,15/32,0.4688',
10:'9/16-18,0.5556,33/64,0.5156,17/32,0.5312',
11:'5/8-18,0.5556,37/64,0.5781,19/32,0.5938'}
self.NC_TapM = {1:'#6-32,0.7937,M2.7,2.7,M2.9,2.9',
2:'#8-32,0.03125,#29,0.136,#27,0.144',
3:'#10-24,0.04167,#25,0.1495,#20,0.161',
4:'#12-24,0.04167,#16,0.177,#12,0.189',
5:'1/4-20,0.05000,#7,0.201,7/32,0.2188',
6:'5/16-18,0.05556,F,0.257,J,0.277',
7:'3/8-16,0.06250,5/16,0.3125,Q,0.332',
8:'7/16-14,0.07143,U,0.368,25/64,0.3906',
9:'1/2-13,0.07692,27/64,0.4219,29/64,0.4531',
10:'9/16-12,0.08333,31/64,0.4844,33/64,0.5156',
11:'5/8-11,0.09091,17/32,0.5312,9/16,0.5625'}
self.M_TapM = {1:'M3-0.5,0.5000,M2.5,2.5,M2.7,2.7',
2:'M4-0.7,0.02756,#30,0.1285,#28,0.1405',
3:'M5-0.8,0.03150,#19,0.166,#16,0.177',
4:'M6-1.0,0.03937,#8,0.199,#4,0.209',
5:'M8-1.25,0.04921,H,0.266,J,0.277',
6:'M10-1.5,0.05906,R,0.339,T,0.358',
7:'M12-1.75,0.06890,13/32,0.4062,27/64,0.4219',
8:'M14-2.0,0.07874,15/32,0.4688,1/2,0.500',
9:'M16-2.0,0.07874,35/64,0.5469,37/64,0.5781'}
On 8/13/2013 9:03 AM, Dave wrote:
Very nice John..
Dave Cole
On 8/13/2013 9:32 AM, John Thornton wrote:
I know most of you guys on the mailing list don't visit the forum so
here is a link to a G code generator for drilling and tapping holes on a
mill. I wrote this mainly because we don't have a tapping cycle and if I
forgot the pre-position move then you get a really neat show as your tap
traverses from where it is to the bottom of the hole. Anyone ever seen a
tapped slot?
This saves me time when I need to tap some holes in a part and helps
prevent errors.
http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator
JT
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Re: [Emc-users] Tapping G code
Oh I forgot to mention I converted the first line of each type of tap as an example. JT On 8/13/2013 9:03 AM, Dave wrote: Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Thanks, just don't use the metric option as the data for metric is still in inch... I have no motivation to convert the few pitch entries in the metric dictionary so if anyone does let me know. JT On 8/13/2013 9:03 AM, Dave wrote: Very nice John.. Dave Cole On 8/13/2013 9:32 AM, John Thornton wrote: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tapping-g-code-generator JT -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
erm...maths in the code :) Dave Caroline -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On Tuesday 13 August 2013 10:15:50 John Thornton did opine: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tappin g-g-code-generator JT Thank you John for continuing to expand this idea. It's beginning to look as if I need to either get a bigger mill, or so serious work on this one to see if I can incorporate rigid tapping encoders, in a spindle with enough power to turn the tap. Has anyone ever attempted to put a treadmill motor on an X1? :) FWIW, I did improve the Z drive I'd made a bit here about 2 weeks ago. I had come across some fairly hard, 1/2 x 5 7076 alu stock that I had used for the jackshaft mount in my lathe had lots of that left, so I sawed off a 7 piece, ripped it down the middle, the made a cutaway to clear the gib lock screws on the left side of the head casting, drilled tapped an 8mm hole near the corner on each end and installed 2 of the leftover ball bearings I removed from my bandsaw when I converted it to koolblocks carbide backing shoes, then drilled tapped 4 more 8mm holes in the sides of the casting and bolted these on so the bearings ride the post maintain its supposedly 90 degree stickout angle. That seems to have alleviated most of the stictions cause by the off the axis location of the drive screw, tending to want to tip the sled up down (its way contact length is way too short to work well). Now I get the impression I need to move the counterweighting springs anchor point to the rear. And maybe buy some ball screws. :) 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) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml Good night to spend with family, but avoid arguments with your mate's new lover. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
2013/8/13 John Thornton bjt...@gmail.com This is the metric dictionary if anyone wants to convert the pitch and drill sizes to mm # Metric Drills change inch drills to metric and your set # tap size, pitch, 75% drill, 75% drill diameter, 50% drill for steel, 50% dia John, could you, please, explain, what do those 75% and 50% mean? -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
That would be complicated to sort out what common metric drill sizes are for each tap and much easier to just update the dictionary with a few entries. I'm just not motivated to do either as I don't use metric drills. JT On 8/13/2013 9:42 AM, Dave Caroline wrote: erm...maths in the code :) Dave Caroline -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
When tapping in steel it is only necessary to have %50 thread depth and %75 thread depth in soft materials. JT On 8/13/2013 10:09 AM, Viesturs Lācis wrote: 2013/8/13 John Thornton bjt...@gmail.com This is the metric dictionary if anyone wants to convert the pitch and drill sizes to mm # Metric Drills change inch drills to metric and your set # tap size, pitch, 75% drill, 75% drill diameter, 50% drill for steel, 50% dia John, could you, please, explain, what do those 75% and 50% mean? -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
2013/8/13 John Thornton bjt...@gmail.com When tapping in steel it is only necessary to have %50 thread depth and %75 thread depth in soft materials. Do you mean it to have tapped 50% / 75% of hole's depth or do you mean increasing the initial drill size so that height of actual thread profile is 50% / 75% of the standard (theoretical) thread profile height? -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 08/13/2013 09:00 AM, Viesturs Lācis wrote: 2013/8/13 John Thornton bjt...@gmail.com When tapping in steel it is only necessary to have %50 thread depth and %75 thread depth in soft materials. Do you mean it to have tapped 50% / 75% of hole's depth or do you mean increasing the initial drill size so that height of actual thread profile is 50% / 75% of the standard (theoretical) thread profile height? From Wikipedia --- Thread depth Screw threads are almost never made perfectly sharp (no truncation at the crest or root), but instead are truncated, yielding a final thread depth that can be expressed as a fraction of the pitch value. The UTS and ISO standards codify the amount of truncation, including tolerance ranges. A perfectly sharp 60° V-thread will have a depth of thread (height from root to crest) equal to .866 of the pitch. This fact is intrinsic to the geometry of an equilateral triangle—a direct result of the basic trigonometric functions. It is independent of measurement units (inch vs mm). However, UTS and ISO threads are not sharp threads. The major and minor diameters delimit truncations on either side of the sharp V, typically about one eighth of the pitch (expressed with the notation 1/8p or .125p), although the actual geometry definition has more variables than that. This means that a full (100%) UTS or ISO thread has a height of around .65p. Threads can be (and often are) truncated a bit more, yielding thread depths of 60% to 75% of the .65p value. This makes the thread-cutting easier (yielding shorter cycle times and longer tap and die life) without a large sacrifice in thread strength. The increased truncation is quantified by the percentage of thread that it leaves in place, where the nominal full thread (where depth is about .65p) is considered 100%. For most applications, 60% to 75% threads are used. To truncate the threads below 100% of nominal, different techniques are used for male and female threads. For male threads, the bar stock is turned down somewhat before thread cutting, so that the major diameter is reduced. Likewise, for female threads the stock material is drilled with a slightly larger tap drill, increasing the minor diameter. (The pitch diameter is not affected by these operations, which are only varying the major or minor diameters.) This balancing of truncation versus thread strength is similar to many engineering decisions involving material strength, material cost and weight, and manufacturing cost. Engineers use a number called the safety factor to quantify the increased material thicknesses or other dimension beyond the minimum required for the estimated loads on a mechanical part. Increasing the safety factor generally increases the cost of manufacture and decreases the likelihood of a failure. So the safety factor is often the focus of a business management decision when a mechanical product's cost impacts business performance and failure of the product could jeopardize human life or company reputation. For example, aerospace contractors are particularly rigorous in the analysis and implementation of safety factors, given the incredible damage that failure could do (crashed aircraft or rockets). Material thickness affects not only the cost of manufacture, but also the device's weight and therefore the cost (in fuel) to lift that weight into the sky (or orbit). The cost of failure and the cost of manufacture are both extremely high. Thus the safety factor dramatically impacts company fortunes and is often worth the additional engineering expense required for detailed analysis and implementation. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On 8/13/2013 12:00 PM, Viesturs Lācis wrote: increasing the initial drill size so that height of actual thread profile is 50% / 75% of the standard (theoretical) thread profile height? That is it.. Dave -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
Your having way too much fun Gene. On 8/13/2013 9:50 AM, Gene Heskett wrote: On Tuesday 13 August 2013 10:15:50 John Thornton did opine: I know most of you guys on the mailing list don't visit the forum so here is a link to a G code generator for drilling and tapping holes on a mill. I wrote this mainly because we don't have a tapping cycle and if I forgot the pre-position move then you get a really neat show as your tap traverses from where it is to the bottom of the hole. Anyone ever seen a tapped slot? This saves me time when I need to tap some holes in a part and helps prevent errors. http://linuxcnc.org/index.php/english/forum/31-cad-cam/26859-mill-tappin g-g-code-generator JT Thank you John for continuing to expand this idea. It's beginning to look as if I need to either get a bigger mill, or so serious work on this one to see if I can incorporate rigid tapping encoders, in a spindle with enough power to turn the tap. Has anyone ever attempted to put a treadmill motor on an X1? :) FWIW, I did improve the Z drive I'd made a bit here about 2 weeks ago. I had come across some fairly hard, 1/2 x 5 7076 alu stock that I had used for the jackshaft mount in my lathe had lots of that left, so I sawed off a 7 piece, ripped it down the middle, the made a cutaway to clear the gib lock screws on the left side of the head casting, drilled tapped an 8mm hole near the corner on each end and installed 2 of the leftover ball bearings I removed from my bandsaw when I converted it to koolblocks carbide backing shoes, then drilled tapped 4 more 8mm holes in the sides of the casting and bolted these on so the bearings ride the post maintain its supposedly 90 degree stickout angle. That seems to have alleviated most of the stictions cause by the off the axis location of the drive screw, tending to want to tip the sled up down (its way contact length is way too short to work well). Now I get the impression I need to move the counterweighting springs anchor point to the rear. And maybe buy some ball screws. :) Cheers, Gene -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tapping G code
On Tuesday 13 August 2013 13:52:32 John Thornton did opine: Your having way too much fun Gene. Love it John, but tell that to the aching calf muscle from a charley horse I woke up with Sunday morning that is still making me do a pretty good imitation of a limp. Getting to be my age is NOT for wimps, but I'm beginning to think I am one, dammit. And I have lots of things I want to do yet. On the cheap of course. :) Those bearings I can get from VXB for $5.00 a roll of 10. Really top quality stuff that. But they seem to be helping anyway. 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) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml No man in the world has more courage than the man who can stop after eating one peanut. -- Channing Pollock A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
