Re: [Emc-users] Arc cutting error when using slow feeds
Ok - 1) Ill get the dxf used off of the computer today, just in case it's different with the one I have here with me. I'll put it up on the blog. 2) I'm going to re-order the cuts - and try redoing the part tonight. 3) I'm almost certain that it's an error on my side being a newbie to Cambam. 4) The funny arc on the pictures (bottom right) - I'll write a program to move the x axis around at different speeds and see with a dial indicator what the backlash and any lost movement is. 5) CNC certainly gives great pleasure, better than watching TV! John A. Stewart. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
i am with # 3 john from what i have seen thats the evidence i gather . again though careful measurement will reveal which side it is on, also does the tool enter near the bad radiii? PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Mon, Jun 17, 2013 at 8:29 AM, John Alexander Stewart ivatt...@gmail.comwrote: Ok - 1) Ill get the dxf used off of the computer today, just in case it's different with the one I have here with me. I'll put it up on the blog. 2) I'm going to re-order the cuts - and try redoing the part tonight. 3) I'm almost certain that it's an error on my side being a newbie to Cambam. 4) The funny arc on the pictures (bottom right) - I'll write a program to move the x axis around at different speeds and see with a dial indicator what the backlash and any lost movement is. 5) CNC certainly gives great pleasure, better than watching TV! John A. Stewart. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
C'mon John too many variables here unless you show us the G code, after all that's what Linuxcnc runs on. It could be the CAD output, it could be whatever CamBam has coughed up from that or shudder human error. Are you running CamBam on Linux? Have they ironed out all the teething troubles yet? Martin John Stewart said: Hi all; I have an issue with a long-running test. I was cutting a hand wheel out of Aluminium, using the output of a CAM program (CamBam). I was twiddling with the feeds and spindle speeds sliders, and wonder if the issue is my twiddling, or if it is with my machine. I seem to remember reading about this issue back when I started with LinuxCNC. Machine KX1 with G540 and a Mesa 5I25 in it. No errors on the console. Why did that arc shown on the blog page have the issue? Was it me possibly setting the feed speed to 0? I'll re-create the CAM program, (with shallower depths) and the feeds/speeds correct, and see if the issue was me, or the machine. The picture is on my blog, http://cnc-for-model-engineers.blogspot.ca/2013/06/hand-wheels-and-cambam-part-i.html should get you there. I won't be able to re-run the whole test for a couple of weeks (it took too long and too noisy for a midnight run). Thanks for any words of wisdom anyone may have. John A. Stewart. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
On Sun, Jun 16, 2013 at 7:02 PM, Martin Dobbins tu...@hotmail.com wrote: C'mon John too many variables here unless you show us the G code, after all that's what Linuxcnc runs on. It could be the CAD output, it could be whatever CamBam has coughed up from that or shudder human error. excellent point - let me see where I can put it that's available to all. Are you running CamBam on Linux? Have they ironed out all the teething troubles yet? Yes, on Linux. Seems to be ok, from my very limited experience! John A. Stewart. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
Martin: On Sun, Jun 16, 2013 at 7:02 PM, Martin Dobbins tu...@hotmail.com wrote: C'mon John too many variables here unless you show us the G code, after all that's what Linuxcnc runs on... Another (especially experienced) set of eyes more than welcome. I think this will work for the GCode: https://www.dropbox.com/s/euvmvc4qpj0dhrj/starTest4-31mmDia.nc You interested in the cambam file and the DXF file? John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
john what tool did you use to drill the center hole? was it interpolated with an endmill? and i am presuming from the code x and y 0 is center of the part? PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 7:57 PM, John Alexander Stewart ivatt...@gmail.comwrote: Martin: On Sun, Jun 16, 2013 at 7:02 PM, Martin Dobbins tu...@hotmail.com wrote: C'mon John too many variables here unless you show us the G code, after all that's what Linuxcnc runs on... Another (especially experienced) set of eyes more than welcome. I think this will work for the GCode: https://www.dropbox.com/s/euvmvc4qpj0dhrj/starTest4-31mmDia.nc You interested in the cambam file and the DXF file? John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
Jeremy; I used a centre drill to drill the hole. After the machining, I moved the table back to (0,0) and put the end mill down it until a bit of aluminium came out, and it seems to be centred still ok. Thanks - John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
ok so the off center was a machine location and not a concern with the program . i still presume x and y 0 were the center of the part correct? you really have a lot of code here without comments . it looks like it is the code fro the inside and outside profile is the outside symmetrical? i seen no g41 or 42 so there is no cutter comp it is programmed to the toolpath. you need to measure and see if the error is in the inside or the outside. what cad package did you use to draw the part ? post the drawing in a link and i will see if i can find errors . usually cam will not cause what you have i think it may be drawing error, or cammanipulation error . i no longer have cam bam installed that pc got blown up in a power crisis PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 8:53 PM, John Alexander Stewart ivatt...@gmail.comwrote: Jeremy; I used a centre drill to drill the hole. After the machining, I moved the table back to (0,0) and put the end mill down it until a bit of aluminium came out, and it seems to be centred still ok. Thanks - John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
Hi all; I have updated the blog page with links to the gcode file, the CamBam file, and a youtube video. I'll put the dxf file on line tomorrow; I started this episode on a windows computer, and it's not here atm, and I want to ensure that the dxf used matches what I have on my linux computers. Here's a direct link to the CamBam file, for anyone interested: https://www.dropbox.com/s/tzfj450ndyem1em/starTest4-31mmDia.cb Thanks - John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
checking it out now john PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:15 PM, John Alexander Stewart ivatt...@gmail.comwrote: Hi all; I have updated the blog page with links to the gcode file, the CamBam file, and a youtube video. I'll put the dxf file on line tomorrow; I started this episode on a windows computer, and it's not here atm, and I want to ensure that the dxf used matches what I have on my linux computers. Here's a direct link to the CamBam file, for anyone interested: https://www.dropbox.com/s/tzfj450ndyem1em/starTest4-31mmDia.cb Thanks - John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
i dont see the dxf PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:27 PM, jeremy youngs jcyoung...@gmail.com wrote: checking it out now john PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:15 PM, John Alexander Stewart ivatt...@gmail.com wrote: Hi all; I have updated the blog page with links to the gcode file, the CamBam file, and a youtube video. I'll put the dxf file on line tomorrow; I started this episode on a windows computer, and it's not here atm, and I want to ensure that the dxf used matches what I have on my linux computers. Here's a direct link to the CamBam file, for anyone interested: https://www.dropbox.com/s/tzfj450ndyem1em/starTest4-31mmDia.cb Thanks - John. -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
On 16 June 2013 21:18, John Alexander Stewart ivatt...@gmail.com wrote: Thanks for any words of wisdom anyone may have. I don't think that the symptoms look like this, and you would have to be unlucky for the system to exactly recover, but it is just possible that the motor slipped a few steps, then regained them. One possible cause for this might be the drives going into reduced current mode having not seen any step pulses for a sufficient time. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
missed steps may be andy but the interpolation segments are all pretty short . and it is one sided . measurement of the part will tell a lot of the story as to which side it is on . another thought is was the part held securely? i ask because it is one sided PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:38 PM, andy pugh bodge...@gmail.com wrote: On 16 June 2013 21:18, John Alexander Stewart ivatt...@gmail.com wrote: Thanks for any words of wisdom anyone may have. I don't think that the symptoms look like this, and you would have to be unlucky for the system to exactly recover, but it is just possible that the motor slipped a few steps, then regained them. One possible cause for this might be the drives going into reduced current mode having not seen any step pulses for a sufficient time. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Arc cutting error when using slow feeds
it is also generally more advisable to machine the center and then the outside as this will reduce chatter on the thin walled surfaces PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:45 PM, jeremy youngs jcyoung...@gmail.com wrote: missed steps may be andy but the interpolation segments are all pretty short . and it is one sided . measurement of the part will tell a lot of the story as to which side it is on . another thought is was the part held securely? i ask because it is one sided PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos, and/or the comments made about my photos or any other picture art posted on my profile. You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee , agent , student or any personnel under your direction or control. The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS RESERVED WITHOUT PREJUDICES jeremy youngs On Sun, Jun 16, 2013 at 9:38 PM, andy pugh bodge...@gmail.com wrote: On 16 June 2013 21:18, John Alexander Stewart ivatt...@gmail.com wrote: Thanks for any words of wisdom anyone may have. I don't think that the symptoms look like this, and you would have to be unlucky for the system to exactly recover, but it is just possible that the motor slipped a few steps, then regained them. One possible cause for this might be the drives going into reduced current mode having not seen any step pulses for a sufficient time. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
