Re: [Emc-users] Lathe touch off
On Thu, 5 Jun 2014 18:37:07 +0100, you wrote: On 5 June 2014 18:14, Marius Liebenberg mar...@mastercut.co.za wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? I always work in diameter, except when trying to programme arcs I was taught to work in Radius mode, but changed to Diameter mode as that is the norm most places and is much more convenient when measuring parts. An offset of 1mm will take 2mm off the diameter of the work - same as on a manual lathe. Only thing to remember is offsets should always be absolute measurements. Tool offsets and touch should be taken care of internally by the controller. As for arcs - I always use CAM so never thought about it and it could catch you out. Steve Blackmore -- -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On 2014-06-06 08:09, Steve Blackmore wrote: On Thu, 5 Jun 2014 18:37:07 +0100, you wrote: On 5 June 2014 18:14, Marius Liebenberg mar...@mastercut.co.za wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? I always work in diameter, except when trying to programme arcs I was taught to work in Radius mode, but changed to Diameter mode as that is the norm most places and is much more convenient when measuring parts. An offset of 1mm will take 2mm off the diameter of the work - same as on a manual lathe. Only thing to remember is offsets should always be absolute measurements. Tool offsets and touch should be taken care of internally by the controller. As for arcs - I always use CAM so never thought about it and it could catch you out. What CAM do you use for lathe Steve? Steve Blackmore -- -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
I do 98% of my lathe work with ngcgui subroutines, having said that when hand programming arcs I use radius mode. JT On 6/5/2014 12:14 PM, Marius Liebenberg wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? On 2014-06-05 12:33, John Thornton wrote: On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
I intend to do that as well. Did you check out the Gladevcp add-on that Nick did http://www.linuxcnc.org/index.php/english/forum/40-subroutines-and-ngcgui/26578-linuxcnc-features-a-kind-of-ngcgui I have it loaded but not working all the way yet but it looks to be a great tool for lathe especially. On 2014-06-06 13:33, John Thornton wrote: I do 98% of my lathe work with ngcgui subroutines, having said that when hand programming arcs I use radius mode. JT On 6/5/2014 12:14 PM, Marius Liebenberg wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? On 2014-06-05 12:33, John Thornton wrote: On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
I gave it a curious look but ngcgui works for me so I'm reluctant to change. JT On 6/6/2014 7:36 AM, Marius Liebenberg wrote: I intend to do that as well. Did you check out the Gladevcp add-on that Nick did http://www.linuxcnc.org/index.php/english/forum/40-subroutines-and-ngcgui/26578-linuxcnc-features-a-kind-of-ngcgui I have it loaded but not working all the way yet but it looks to be a great tool for lathe especially. On 2014-06-06 13:33, John Thornton wrote: I do 98% of my lathe work with ngcgui subroutines, having said that when hand programming arcs I use radius mode. JT On 6/5/2014 12:14 PM, Marius Liebenberg wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? On 2014-06-05 12:33, John Thornton wrote: On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
Ngcgui is also good for me but I like how Nick's program strings a lot of commands together with some degree of programmability on the fly. On 2014-06-06 17:14, John Thornton wrote: I gave it a curious look but ngcgui works for me so I'm reluctant to change. JT On 6/6/2014 7:36 AM, Marius Liebenberg wrote: I intend to do that as well. Did you check out the Gladevcp add-on that Nick did http://www.linuxcnc.org/index.php/english/forum/40-subroutines-and-ngcgui/26578-linuxcnc-features-a-kind-of-ngcgui I have it loaded but not working all the way yet but it looks to be a great tool for lathe especially. On 2014-06-06 13:33, John Thornton wrote: I do 98% of my lathe work with ngcgui subroutines, having said that when hand programming arcs I use radius mode. JT On 6/5/2014 12:14 PM, Marius Liebenberg wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? On 2014-06-05 12:33, John Thornton wrote: On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On Fri, 06 Jun 2014 08:42:30 +0200, you wrote: As for arcs - I always use CAM so never thought about it and it could catch you out. What CAM do you use for lathe Steve? FeatureCam - I have a license for Dolphin Partmaster too - but I prefer the former. Steve Blackmore -- -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? On 2014-06-05 12:33, John Thornton wrote: On X you can get confused if you forget what mode your in. For diameter mode it is 2 x the dowel + the diameter of the object in the chuck. For radius mode it is the diameter of the dowel + 1/2 the diameter of the object in the chuck. JT On 6/4/2014 8:08 AM, Marius Liebenberg wrote: So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On 5 June 2014 18:14, Marius Liebenberg mar...@mastercut.co.za wrote: Would you say it is better to always work in any one of the modes? I mean Radius or Diameter? I always work in diameter, except when trying to programme arcs -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Lathe touch off
Hi all I am fairly new to using a cnc lathe and I need some guidance with touch off procedures. I am busy with a turret changer but for now I only have a QC tool post with a limited number of holders so I have to re-tool in the middle of a job. I have homing switches on both axis. 1: With no touch probe how do I do a job that requires a tool change that does not have fixed holders while the stock is in the chuck. 2: How do I get the tool set to the Z zero line accurately? How do the regular users do this please? All help is greatly appreciated :) -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On 4 June 2014 08:17, Marius Liebenberg mar...@mastercut.co.za wrote: How do the regular users do this please? All help is greatly appreciated :) If you are changing tools mid-job then each tool that you are going to use needs to be in a holder. If you need to move tools between holders, then you will find it easier to split the job. I have a turning and facing tool that is designated as tool1 and that always has zero in the offsets. Using the Axis interface it is a bit too easy to mistakenly touch off an axis when you meant to touch off a tool, and vice-versa. If I accidentally put a tool offset in tool 1 then G10 L1 P1 Z0 X0 recovers the situation. I generally jog the tool up close to the work, touch-off the current position to (for example) 0.5mm in the current coordinate system, then face-off to Z = 0. I then take a test cut, measure with a micrometer, and touch-off the X to the measured diameter. That is normally enough, as my other tools have all been set up relative to Tool 1 previously. But if not, then the process is repeated for the other tools, but touching-off into the tool, not axis, offsets. If my home switch was more repeatable then stage 1 would be a one-time thing too. For boring bars I set the Z=0 using a broken 6mm milling cutter rather than with a test cut. Put the tip less than 6mm from the reference face, hold the milling cutter in the gap, and slowly jog away from the work until the cutter pops through the gap (much safer than jogging _on_ to a test block) if your QC toolpost isn't very repeatable then you might need to swap parts rather than tools. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
I use a dowel to touch off to the face of my spindle using the same method as Andy, move the tool closer than the diameter of the dowel then put the dowel between and jog out using 0.001 increments. And like Andy when the dowel falls through I touch off the tool not the material. For X I use the dowel to get close then do a test cut and measure then put that into the touch off entry. Once my turret is set up I chuck the material up and using my facing/turning tool I touch off to the material using the dowel method and the convenient touch off to material button that I added to my pyvcp panel. http://gnipsel.com/linuxcnc/g-code/gen05.html I also have some pyvcp buttons for touch off so I don't accidentally touch off to the wrong thing and screw up my offsets. http://gnipsel.com/shop/hardinge/hardinge.xhtml JT On 6/4/2014 2:17 AM, Marius Liebenberg wrote: Hi all I am fairly new to using a cnc lathe and I need some guidance with touch off procedures. I am busy with a turret changer but for now I only have a QC tool post with a limited number of holders so I have to re-tool in the middle of a job. I have homing switches on both axis. 1: With no touch probe how do I do a job that requires a tool change that does not have fixed holders while the stock is in the chuck. 2: How do I get the tool set to the Z zero line accurately? How do the regular users do this please? All help is greatly appreciated :) -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On 2014-06-04 10:49, andy pugh wrote: On 4 June 2014 08:17, Marius Liebenberg mar...@mastercut.co.za wrote: How do the regular users do this please? All help is greatly appreciated :) If you are changing tools mid-job then each tool that you are going to use needs to be in a holder. If you need to move tools between holders, then you will find it easier to split the job. I will have to do this, no choice. I have a turning and facing tool that is designated as tool1 and that always has zero in the offsets. Using the Axis interface it is a bit too easy to mistakenly touch off an axis when you meant to touch off a tool, and vice-versa. If I accidentally put a tool offset in tool 1 then G10 L1 P1 Z0 X0 recovers the situation. I generally jog the tool up close to the work, touch-off the current position to (for example) 0.5mm in the current coordinate system, then face-off to Z = 0. I then take a test cut, measure with a micrometer, and touch-off the X to the measured diameter. That answers my question exactly. That is normally enough, as my other tools have all been set up relative to Tool 1 previously. But if not, then the process is repeated for the other tools, but touching-off into the tool, not axis, offsets. If my home switch was more repeatable then stage 1 would be a one-time thing too. For boring bars I set the Z=0 using a broken 6mm milling cutter rather than with a test cut. Put the tip less than 6mm from the reference face, hold the milling cutter in the gap, and slowly jog away from the work until the cutter pops through the gap (much safer than jogging _on_ to a test block) if your QC toolpost isn't very repeatable then you might need to swap parts rather than tools. Great, now I have some ideas on how the old hands do things :) -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe touch off
On 2014-06-04 13:10, John Thornton wrote: I use a dowel to touch off to the face of my spindle using the same method as Andy, move the tool closer than the diameter of the dowel then put the dowel between and jog out using 0.001 increments. And like Andy when the dowel falls through I touch off the tool not the material. For X I use the dowel to get close then do a test cut and measure then put that into the touch off entry. Once my turret is set up I chuck the material up and using my facing/turning tool I touch off to the material using the dowel method and the convenient touch off to material button that I added to my pyvcp panel. So for the boring bar I can put an old rotary tool in the chuck and bring the bar from behind. I then lay the dowel between the the two tolls and jog away. The touch off will be that position less the diameter of the two tools. Do I have this correct? http://gnipsel.com/linuxcnc/g-code/gen05.html I also have some pyvcp buttons for touch off so I don't accidentally touch off to the wrong thing and screw up my offsets. http://gnipsel.com/shop/hardinge/hardinge.xhtml JT On 6/4/2014 2:17 AM, Marius Liebenberg wrote: Hi all I am fairly new to using a cnc lathe and I need some guidance with touch off procedures. I am busy with a turret changer but for now I only have a QC tool post with a limited number of holders so I have to re-tool in the middle of a job. I have homing switches on both axis. 1: With no touch probe how do I do a job that requires a tool change that does not have fixed holders while the stock is in the chuck. 2: How do I get the tool set to the Z zero line accurately? How do the regular users do this please? All help is greatly appreciated :) -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
