Re: [Emc-users] question about tapered threading (etc)
On Sat, 28 Jan 2012 22:40:29 +, you wrote: >> Haven't seen the belated 2.5 yet... > >It has, indeed, been "imminent" for a long time. I suspect that a lot >of the delay has been due to the EMC lawyers. Last time I asked here the reason given for the delay was bugs - not so long ago either. >I have a suspicion that 2.6 will follow fairly shortly after 2.5. >It is available as pre-compiled packages, and as far as I know has few bugs. Hope so, it's been far too long since last official update. Steve Blackmore -- -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
> Haven't seen the belated 2.5 yet... It has, indeed, been "imminent" for a long time. I suspect that a lot of the delay has been due to the EMC lawyers. I have a suspicion that 2.6 will follow fairly shortly after 2.5. It is available as pre-compiled packages, and as far as I know has few bugs. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Fri, 27 Jan 2012 10:06:40 +, you wrote: >On 27 January 2012 08:32, Steve Blackmore wrote: > >> I'm not asking that the existing G33 be abandoned, just an addition, >> correct version added, preferably using G32. > >As I said earlier, that's fairly easy to do with the G-code remapping >functions in version 2.6. 2.6 ?? Haven't seen the belated 2.5 yet... Steve Blackmore -- -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 27 January 2012 08:32, Steve Blackmore wrote: > I'm not asking that the existing G33 be abandoned, just an addition, > correct version added, preferably using G32. As I said earlier, that's fairly easy to do with the G-code remapping functions in version 2.6. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Thu, 26 Jan 2012 22:06:30 +, you wrote: >On 26 January 2012 21:55, Steve Blackmore wrote: > >>>http://pdf.directindustry.com/pdf/delectron/g-code-programming-manual/14577-33189-_23.html >> >> Andy - that is for Milling Machines. > >"Typical function for lathes, can also be used in milling machines" is >what it says. Read the following "CNC Programming Handbook" by Peter Smid, a must for everyone who wants to know about CNC programming and even those who think they already do :) Machinery's Handbook, Fanuc or Siemens and all the DIN, ISO, BS standards define the pitch along the long axis, not the taper. I'm not asking that the existing G33 be abandoned, just an addition, correct version added, preferably using G32. Steve Blackmore -- -- Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 26 January 2012 21:55, Steve Blackmore wrote: >>http://pdf.directindustry.com/pdf/delectron/g-code-programming-manual/14577-33189-_23.html > > Andy - that is for Milling Machines. "Typical function for lathes, can also be used in milling machines" is what it says. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Wed, 25 Jan 2012 10:20:22 +, you wrote: >On 25 January 2012 08:27, Steve Blackmore wrote: > >> Be MUCH better if along the hypotenuse was G33.1 and along the axis was >> G33 (or even better G32). At least then threading would be industry >> standard. > >It isn't even that clear-cut: >http://pdf.directindustry.com/pdf/delectron/g-code-programming-manual/14577-33189-_23.html Andy - that is for Milling Machines. Steve Blackmore -- -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
well they both have a first name that starts with J LOL so I got one letter right. John On 1/25/2012 6:04 AM, sam sokolik wrote: > You can see it here. > > http://www.youtube.com/watch?v=ACvRilmIKDQ > > (that was JohnK) > > I really like the flexibility over a standard. (I didn't know there was > a 'standard' from research I have done) And with a little math - it > will make a perfect tapered thread. With re-mapping now there are even > more options. (considering with the source code - the options are > really unlimited.. ;) ) > > sam > > On 01/25/2012 05:51 AM, John Thornton wrote: >> IIRC Jeff Eppler cut a fusee for a mousetrap powered car... >> >> John >> >> On 1/24/2012 3:52 PM, John Prentice wrote: >>> - Original Message - >>> From: "Kent A. Reed" >>> >>> Several items were called out recently as being show stoppers for LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well enough to contribute to discussion of the first item, "No jog on feedhold". However, the second item "Taper thread pitches are measured along the hypotenuse ???" is an issue I think this bear of limited brain ought to be able to understand without being a LinuxCNC guru. >>> (a) The jog in feedhold really is a significant pain. You do need to move >>> the tool away from the work when milling or turning "stringy" materials. >>> Even something simple like deep-drilling with pecks can snarl up the tool >>> with swarf. Of course the general solution could be very complex (e.g. if >>> offsets were to be changed while feedheld) but some simple rules would cover >>> a lot of cases without obvious risks to a thinking user. >>> >>> (b) For most practical tapered pipe threads no one will notice the pitch >>> error. On one hand I think it is unusual CNC behaviour in threading (so >>> possible difficulties for CAM users without a special postprocessor). But on >>> the other hand the case of the angle not being small but being 90deg does >>> appear to allow cutting of scrolls - has anyone ever tried this? >>> >>> John Prentice >>> >>> . >>> >>> >>> -- >>> Keep Your Developer Skills Current with LearnDevNow! >>> The most comprehensive online learning library for Microsoft developers >>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >>> Metro Style Apps, more. Free future releases when you subscribe now! >>> http://p.sf.net/sfu/learndevnow-d2d >>> ___ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> -- >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >> Metro Style Apps, more. Free future releases when you subscribe now! >> http://p.sf.net/sfu/learndevnow-d2d >> ___ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > -- > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
You can see it here. http://www.youtube.com/watch?v=ACvRilmIKDQ (that was JohnK) I really like the flexibility over a standard. (I didn't know there was a 'standard' from research I have done) And with a little math - it will make a perfect tapered thread. With re-mapping now there are even more options. (considering with the source code - the options are really unlimited.. ;) ) sam On 01/25/2012 05:51 AM, John Thornton wrote: > IIRC Jeff Eppler cut a fusee for a mousetrap powered car... > > John > > On 1/24/2012 3:52 PM, John Prentice wrote: >> - Original Message - >> From: "Kent A. Reed" >> >> >>> Several items were called out recently as being show stoppers for >>> LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well >>> enough to contribute to discussion of the first item, "No jog on >>> feedhold". >>> >>> However, the second item "Taper thread pitches are measured along the >>> hypotenuse ???" is an issue I think this bear of limited brain ought to >>> be able to understand without being a LinuxCNC guru. >>> >> (a) The jog in feedhold really is a significant pain. You do need to move >> the tool away from the work when milling or turning "stringy" materials. >> Even something simple like deep-drilling with pecks can snarl up the tool >> with swarf. Of course the general solution could be very complex (e.g. if >> offsets were to be changed while feedheld) but some simple rules would cover >> a lot of cases without obvious risks to a thinking user. >> >> (b) For most practical tapered pipe threads no one will notice the pitch >> error. On one hand I think it is unusual CNC behaviour in threading (so >> possible difficulties for CAM users without a special postprocessor). But on >> the other hand the case of the angle not being small but being 90deg does >> appear to allow cutting of scrolls - has anyone ever tried this? >> >> John Prentice >> >> . >> >> >> -- >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >> Metro Style Apps, more. Free future releases when you subscribe now! >> http://p.sf.net/sfu/learndevnow-d2d >> ___ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > -- > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
IIRC Jeff Eppler cut a fusee for a mousetrap powered car... John On 1/24/2012 3:52 PM, John Prentice wrote: > - Original Message - > From: "Kent A. Reed" > > >> Several items were called out recently as being show stoppers for >> LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well >> enough to contribute to discussion of the first item, "No jog on >> feedhold". >> >> However, the second item "Taper thread pitches are measured along the >> hypotenuse ???" is an issue I think this bear of limited brain ought to >> be able to understand without being a LinuxCNC guru. >> > (a) The jog in feedhold really is a significant pain. You do need to move > the tool away from the work when milling or turning "stringy" materials. > Even something simple like deep-drilling with pecks can snarl up the tool > with swarf. Of course the general solution could be very complex (e.g. if > offsets were to be changed while feedheld) but some simple rules would cover > a lot of cases without obvious risks to a thinking user. > > (b) For most practical tapered pipe threads no one will notice the pitch > error. On one hand I think it is unusual CNC behaviour in threading (so > possible difficulties for CAM users without a special postprocessor). But on > the other hand the case of the angle not being small but being 90deg does > appear to allow cutting of scrolls - has anyone ever tried this? > > John Prentice > > . > > > -- > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 25 January 2012 08:27, Steve Blackmore wrote: > Be MUCH better if along the hypotenuse was G33.1 and along the axis was > G33 (or even better G32). At least then threading would be industry > standard. It isn't even that clear-cut: http://pdf.directindustry.com/pdf/delectron/g-code-programming-manual/14577-33189-_23.html -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Tue, 24 Jan 2012 23:47:26 -0500, you wrote: >And that is the reason EMC measures pitch along the hypotenuse. > >A fairly famous quote from Allan Kay goes: >"Simple things should be simple, complex things should be possible." Butt you've made a simple thing complex. Be MUCH better if along the hypotenuse was G33.1 and along the axis was G33 (or even better G32). At least then threading would be industry standard. Steve Blackmore -- -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 1/25/2012 1:11 AM, Kent A. Reed wrote: > It may be annoying to know LinuxCNC works best with G-code programs > tailored to it, but isn't this true also for other controllers? Yes. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 1/24/2012 4:52 PM, John Prentice wrote: > On one hand I think it is unusual CNC behaviour in threading (so > possible difficulties for CAM users without a special postprocessor). John: Since I haven't had the pleasure of using serious CAM software I don't have first-hand experience with their postprocessors, but my inclination is to say, sure, a LinuxCNC-flavored postprocessor is required if one wants to stray off the RS274D reservation (I wish I knew enough about ISO 6983 and DIN 66025 to know if they can be mentioned in the same breath). There was the NCMS project to define the Next Generation Controller that developed the variant called RS274/NGC and there was the NIST project to implement this variant, one result of which was Tom Kramer's G-code interpreter. As I understand it, adjustments had to be made where the NGC publications were ambiguous so the G-code definitions in Tom's paper were already a dialect of a variant and since then we've added to/modified the language some more as LinuxCNC evolved. It may be annoying to know LinuxCNC works best with G-code programs tailored to it, but isn't this true also for other controllers? I looked up Haas Lathe on the BobCAM site and found a bunch of different post-processor variations (Haas-HL, Haas-SL, Haas-TL, etc.) some with up to 6 released versions. BobCAM lists 35 makes of lathe controller (including "generic"). Yikes. Just my 2 cents worth. Regards, Kent -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Tue, Jan 24, 2012, at 10:02 PM, andy pugh wrote: > On 24 January 2012 21:52, John Prentice > wrote: > > > (b) For most practical tapered pipe threads no one will notice the pitch > > error. On one hand I think it is unusual CNC behaviour in threading (so > > possible difficulties for CAM users without a special postprocessor). But on > > the other hand the case of the angle not being small but being 90deg does > > appear to allow cutting of scrolls - has anyone ever tried this? > > Not yet, but I am very much considering making a 3-jaw chuck milling > vice thingy, so will need to then. > And that is the reason EMC measures pitch along the hypotenuse. A fairly famous quote from Allan Kay goes: "Simple things should be simple, complex things should be possible." With the current configuration, simple things (straight threads) are simple. Complex things (tapered threads, including the extreme of a "flat thread" as in a three-jaw chuck) are possible. You have to do a little trig and make a minor correction if you want gage perfect pipe threads, but it is certainly possible. If EMC always calculated pitch along the Z axis, then the flat three-jaw-chuck style thread would be impossible. That is the reasoning behind our "stubborn insistence" that EMC work the way it does. We would rather have some complex things be a little more complex, if it lets us avoid making other complex things completely impossible. John Kasunich -- John Kasunich jmkasun...@fastmail.fm -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On Tue, 24 Jan 2012 23:33:04 + andy pugh wrote: > On 24 January 2012 22:52, Kenneth Lerman > wrote: > > > 4 -- Hire someone to do #2. (Don't even ask -- I have two prices > > for my work on LinuxCNC, the first is free and you probably can't > > afford the second.) > > This is the nub of the very crux of one of the problems. > None of the people who are in a position to do paid work on LinuxCNC > have the time to take on extra paid work. > They are (to generalise) too busy doing stuff for fun for free. > ...and I for one are very thankful. Dave -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 24 January 2012 22:52, Kenneth Lerman wrote: > 4 -- Hire someone to do #2. (Don't even ask -- I have two prices for my > work on LinuxCNC, the first is free and you probably can't afford the > second.) This is the nub of the very crux of one of the problems. None of the people who are in a position to do paid work on LinuxCNC have the time to take on extra paid work. They are (to generalise) too busy doing stuff for fun for free. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 1/24/2012 4:52 PM, John Prentice wrote: > - Original Message - > From: "Kent A. Reed" > > >> Several items were called out recently as being show stoppers for >> LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well >> enough to contribute to discussion of the first item, "No jog on >> feedhold". >> >> However, the second item "Taper thread pitches are measured along the >> hypotenuse ???" is an issue I think this bear of limited brain ought to >> be able to understand without being a LinuxCNC guru. >> > (a) The jog in feedhold really is a significant pain. You do need to move > the tool away from the work when milling or turning "stringy" materials. > Even something simple like deep-drilling with pecks can snarl up the tool > with swarf. Of course the general solution could be very complex (e.g. if > offsets were to be changed while feedheld) but some simple rules would cover > a lot of cases without obvious risks to a thinking user. Implementing this should actually be pretty easy if you implement a jog at the hal level. In the case of a servo machine, just add an offset to the target position of the PID control. Of course, you would probably want to have some sort of switch to enable it and cause the "normal" jog signals to be used here. You would also want to save the current position so you could go back to where you started. Most of this is probably doable without writing a line of C code. Of course, if you want to change tools and use a tool with different offsets, that would be a different problem. If I were implementing this, I would probably build a new component. The new component would "memorize" the jogging that was done so that hitting a single button could reverse the motion and have to tool return to the original location following the same path in reverse. I can understand that not everyone is a C programmer. Many EMC^H ^H ^H LinuxCNC users are integrators, though, and should be able to build something like this using hal. As far as the threading is concerned, some people just seem to want to complain. Alternatives include: 1 -- Do a little trig and convert the numbers. 2 -- Modify the source to (use the same trig) do it the way you like. Be generous and add a configuration flag that lets the code do things either way. 3 -- Find a friend to do #2. 4 -- Hire someone to do #2. (Don't even ask -- I have two prices for my work on LinuxCNC, the first is free and you probably can't afford the second.) Regards, Ken > > (b) For most practical tapered pipe threads no one will notice the pitch > error. On one hand I think it is unusual CNC behaviour in threading (so > possible difficulties for CAM users without a special postprocessor). But on > the other hand the case of the angle not being small but being 90deg does > appear to allow cutting of scrolls - has anyone ever tried this? > > John Prentice > > . > > > -- > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
On 24 January 2012 21:52, John Prentice wrote: > (b) For most practical tapered pipe threads no one will notice the pitch > error. On one hand I think it is unusual CNC behaviour in threading (so > possible difficulties for CAM users without a special postprocessor). But on > the other hand the case of the angle not being small but being 90deg does > appear to allow cutting of scrolls - has anyone ever tried this? Not yet, but I am very much considering making a 3-jaw chuck milling vice thingy, so will need to then. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] question about tapered threading (etc)
- Original Message - From: "Kent A. Reed" > > Several items were called out recently as being show stoppers for > LinuxCNC. I do not aspire to learn the inner workings of LinuxCNC well > enough to contribute to discussion of the first item, "No jog on > feedhold". > > However, the second item "Taper thread pitches are measured along the > hypotenuse ???" is an issue I think this bear of limited brain ought to > be able to understand without being a LinuxCNC guru. > (a) The jog in feedhold really is a significant pain. You do need to move the tool away from the work when milling or turning "stringy" materials. Even something simple like deep-drilling with pecks can snarl up the tool with swarf. Of course the general solution could be very complex (e.g. if offsets were to be changed while feedheld) but some simple rules would cover a lot of cases without obvious risks to a thinking user. (b) For most practical tapered pipe threads no one will notice the pitch error. On one hand I think it is unusual CNC behaviour in threading (so possible difficulties for CAM users without a special postprocessor). But on the other hand the case of the angle not being small but being 90deg does appear to allow cutting of scrolls - has anyone ever tried this? John Prentice . -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
