Re: [Emc-users] Steppers and INI file
Thanks Chris. The G0 answer makes sense. I am running EMC 2.1.1 I'll post the INI file as soon as I get it off the machine. Best regards, -- -- Glenn On Thu, Mar 01, 2007 at 04:04:16PM -0800, Glenn R. Edwards wrote: > > I have noticed that when I do a fast-move command with all axes going, > such as G0 X50 Y30 Z20 A90 (from home), the angular axis will move > faster than when I do a single axis move such as G0 A90. Please post your ini (attach it here, or use www.pastebin.ca and include just a link here) and also say which version of EMC you are running. > And I noticed > that a G0 command behaves like a G1 command in that all the axes arrive > at the same time. For example, in the multi-axis move listed above, I > would expect a trapezoid move profile (the axes with shorter distances > arrive first) but I am getting a straight-line move profile from home to > the end-point. Any suggestions or comments? This is the correct behavior; the axes should start and stop together, according to the rs274ngc spec: http://www.linuxcnc.org/handbook/RS274NGC_3/RS274NGC_32a.html#1012110 Since you would have to wait for the slowest axis (making the longest move) anyway, this costs you no extra time, and a straight move is a lot less "surprising" in a lot of situations. Chris - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDE V ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Steppers and INI file
On Thu, Mar 01, 2007 at 04:04:16PM -0800, Glenn R. Edwards wrote: > > I have noticed that when I do a fast-move command with all axes going, > such as G0 X50 Y30 Z20 A90 (from home), the angular axis will move > faster than when I do a single axis move such as G0 A90. Please post your ini (attach it here, or use www.pastebin.ca and include just a link here) and also say which version of EMC you are running. > And I noticed > that a G0 command behaves like a G1 command in that all the axes arrive > at the same time. For example, in the multi-axis move listed above, I > would expect a trapezoid move profile (the axes with shorter distances > arrive first) but I am getting a straight-line move profile from home to > the end-point. Any suggestions or comments? This is the correct behavior; the axes should start and stop together, according to the rs274ngc spec: http://www.linuxcnc.org/handbook/RS274NGC_3/RS274NGC_32a.html#1012110 Since you would have to wait for the slowest axis (making the longest move) anyway, this costs you no extra time, and a straight move is a lot less "surprising" in a lot of situations. Chris - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Steppers and INI file
I am running a four-axis mini-type mill with a xylotec board and stepper motors throughout. Everything runs fine (pretty much) except for the 4th axis which is an angular axis. All the linear axes have the same settings in the INI file and are mechanically the same. I have noticed that when I do a fast-move command with all axes going, such as G0 X50 Y30 Z20 A90 (from home), the angular axis will move faster than when I do a single axis move such as G0 A90. And I noticed that a G0 command behaves like a G1 command in that all the axes arrive at the same time. For example, in the multi-axis move listed above, I would expect a trapezoid move profile (the axes with shorter distances arrive first) but I am getting a straight-line move profile from home to the end-point. Any suggestions or comments? Best regards, -- -- Glenn - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
