Re: [Emc-users] SheetCam TNG V0.0.24 for Linux released
Hi Les, The install went find on Ubuntu 6.06 here John On 18 Jun 2008 at 22:54, Leslie Newell wrote: Hi Kent, Most of the install issues have been with older versions. More recent Linux distributions are more standardised and easier to work with. With dialog boxes, the help is supposed to appear on the side of the window. It works reasonably well on Windows but Linux windows tend to be a lot more spread out so the help gets a bit big. Maybe that was one of those good ideas that doesn't work too well in practice. Les Kent A. Reed wrote: Les: It's interesting to see the problems some are running into. Starting with a fresh copy of Ubuntu 8.04LTS, I installed SheetCam TNG V0.0.23 last week using the autopackage. No problem. Last night, I followed your instructions and had no problem uninstalling V0.0.23 or installing V0.0.24. I understand your pushing sand up a hill with your nose metaphor (I have sometimes felt it was more like pushing sand up my nose with a hill) but the installs just worked for me. Once installed, however, SheetCam TNG V0.0.24 is doing some funky interleaving of various window panes when I invoke Help. I'll try to do a screen capture if you haven't seen the behavior already. Regards, Kent -- --- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is Ohmikron SDS0707 CNC control system supported by EMC/EMC2 ?
No. deskcnc uses a proprietary protocol to communicate with its external box and is not compatible with emc2. This system plus suitable motors is what the earlier poster may have had in mind: http://pico-systems.com/smallpwm.html Jeff - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is Ohmikron SDS0707 CNC control system supported by EMC/EMC2 ?
On Thu, 2008-06-19 at 01:33 -0400, Sergey Izvoztchikov wrote: Documentation on Ohmikron's parallel interface in on separate page dedicated to PPT1006 . Follow detail links from SDS0707's page Wow, I had a hard time finding that one. I usually look for a visual cue (icon) for links, not a keyword embedded in text. There is enough information on the link: http://www.ohmikron.com/index.php?q=Q05hdlBhZ2V8U0hPV19TVEFUSUN8QkxLPUlORk9fUFBUMTAwNnxUUEw9Y2F0YWxvZy9QUFQxMDA2LnRwbA== or http://www.ohmikron.com/transfer/PPT1006.pdf to get EMC to work with the PPT1006. When you mentioned brushed DC servo system were you talking about IMService's DeskCNC ? At the moment it's over my budged. What would be advantage(s) of it over CNC system using stepper motor for hobby use ? If I don't plan production runs or any other kind of shop like use for my system, I think I should be fine with stepper motors. I am not aware of DeskCNC. I just mean a system based on a DC brushed motor. IMService does have a good example: http://www.cadcamcadcam.com/index.asp?PageAction=VIEWPRODProdID=61 but it could be any similar motor, such as: http://surpluscenter.com/item.asp?UID=2008061910243538item=10-1674catname=electric http://surpluscenter.com/item.asp?UID=2008061910243538item=1043-Acatname=electric In looking at the IMService information, their motor has some advantages in that it, comes with an encoder and gear reduction, so this would save some work. The plain motors linked above don't include these things. I normally use a belt reduction so that there is no backlash added by a gear reducer and I mount the encoder on the end of the axis ballscrew and not the motor shaft. For me making these parts is part of the fun and lets me configure the machine to my preferences. Plus, I save a little money. You can get belts and pulleys from Mcmaster.com . I normally use encoder disks and sensors from usdigital.com . Here is Chris's Sherline example: http://timeguy.com/cradek-files/cnc/lathe/DSCN6295.JPG but I would change it by putting the encoder on the big pulley on the leadscrew. A motor driver can be as simple as: http://emergent.unpy.net/projects/01142347802 Others on the list should be better at suggesting a simple or cheap driver that would get you started. I am not a fan of steppers because they don't normally have position feed-back. When EMC commands a move, the number of steps and direction are sent to the stepper motor and it is assumed that the motor completes those steps. The performance of your system needs to be well tested so that you can set the stepping parameters so that the motors are never in a condition to lose steps. If you do lose steps, you often won't know until it shows up in your parts. With a servo system the encoder feeds back position information as a move is being made. EMC then corrects for errors. Also the encoder position information is used for the position display, so the position on the screen is the position of the machine. For a stepper, the position display is based on step counts, so if you lose motor steps, your display loses steps too. Encoders can be used with steppers but it gets complicated as to how to implement them. You should be fine with steppers. My Shizuoka mill has steppers (for a while) and they work fine. Tormach has a compelling argument for using steppers which is here: http://www.tormach.com/document_library/TD30204_DesignAnalysis.pdf Some people say that tuning servos is difficult and complicated, but stepper behavior changes dependent on load, system mass, and speed (frequency). If your stepper decides to misbehave at a certain speed or load, analyzing and correcting the problem can be more difficult because you don't normally have the feed back element and you have fewer options for correcting the problem. Usually you take a guess and then dumb down the settings for a safety factor. Given EMC's features, very little cost difference, and being able to build a usable system as time and money becomes available, I prefer brushed servo's. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] SheetCam TNG V0.0.24 for Linux released
I've had enough. Won't install on 804. On Thu, Jun 19, 2008 at 8:34 AM, John Thornton [EMAIL PROTECTED] wrote: Hi Les, The install went find on Ubuntu 6.06 here John On 18 Jun 2008 at 22:54, Leslie Newell wrote: Hi Kent, Most of the install issues have been with older versions. More recent Linux distributions are more standardised and easier to work with. With dialog boxes, the help is supposed to appear on the side of the window. It works reasonably well on Windows but Linux windows tend to be a lot more spread out so the help gets a bit big. Maybe that was one of those good ideas that doesn't work too well in practice. Les Kent A. Reed wrote: Les: It's interesting to see the problems some are running into. Starting with a fresh copy of Ubuntu 8.04LTS, I installed SheetCam TNG V0.0.23 last week using the autopackage. No problem. Last night, I followed your instructions and had no problem uninstalling V0.0.23 or installing V0.0.24. I understand your pushing sand up a hill with your nose metaphor (I have sometimes felt it was more like pushing sand up my nose with a hill) but the installs just worked for me. Once installed, however, SheetCam TNG V0.0.24 is doing some funky interleaving of various window panes when I invoke Help. I'll try to do a screen capture if you haven't seen the behavior already. Regards, Kent -- --- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Emory Smith - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] SheetCam TNG V0.0.24 for Linux released
What error message do you get? Les Emory Smith wrote: I've had enough. Won't install on 804. - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is Ohmikron SDS0707 CNC control system supported by EMC/EMC2 ?
On Thu, 2008-06-19 at 08:36 -0500, Jeff Epler wrote: No. deskcnc uses a proprietary protocol to communicate with its external box and is not compatible with emc2. This system plus suitable motors is what the earlier poster may have had in mind: http://pico-systems.com/smallpwm.html Jeff Oops, I missed that. I concur. The Desk CNC and other controllers that use a serial, USB or anything other than the parallel port to pass information from the PC to the controller, are not compatible with EMC. Controller/drivers that use the parallel port to get command information from the PC are compatible if they were designed to work with EMC. Most (maybe all) step/direction and PWM drivers are compatible with EMC. (A treasure trove* of) EMC hardware information is here: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware ( * slightly inaccurate : http://en.wikipedia.org/wiki/Treasure_trove ) -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is Ohmikron SDS0707 CNC control system supported by EMC/EMC2 ?
Thanks a lot for all those links and information. I'm not sure if I could handle DIY CNC. The reason I look at Ohmikron and Xylotex systems is their completeness and low price. Are there information about complete DIY CNC systems based on servos and for low knowledge level person or with down the earth detailed descriptions with minimal scratch building requirements ? And they have to be low cost too. IMService's systems are quite expensive and over my budget. On Thu, 2008-06-19 at 10:21 -0700, Kirk Wallace wrote: On Thu, 2008-06-19 at 01:33 -0400, Sergey Izvoztchikov wrote: Documentation on Ohmikron's parallel interface in on separate page dedicated to PPT1006 . Follow detail links from SDS0707's page Wow, I had a hard time finding that one. I usually look for a visual cue (icon) for links, not a keyword embedded in text. There is enough information on the link: http://www.ohmikron.com/index.php?q=Q05hdlBhZ2V8U0hPV19TVEFUSUN8QkxLPUlORk9fUFBUMTAwNnxUUEw9Y2F0YWxvZy9QUFQxMDA2LnRwbA== or http://www.ohmikron.com/transfer/PPT1006.pdf to get EMC to work with the PPT1006. When you mentioned brushed DC servo system were you talking about IMService's DeskCNC ? At the moment it's over my budged. What would be advantage(s) of it over CNC system using stepper motor for hobby use ? If I don't plan production runs or any other kind of shop like use for my system, I think I should be fine with stepper motors. I am not aware of DeskCNC. I just mean a system based on a DC brushed motor. IMService does have a good example: http://www.cadcamcadcam.com/index.asp?PageAction=VIEWPRODProdID=61 but it could be any similar motor, such as: http://surpluscenter.com/item.asp?UID=2008061910243538item=10-1674catname=electric http://surpluscenter.com/item.asp?UID=2008061910243538item=1043-Acatname=electric In looking at the IMService information, their motor has some advantages in that it, comes with an encoder and gear reduction, so this would save some work. The plain motors linked above don't include these things. I normally use a belt reduction so that there is no backlash added by a gear reducer and I mount the encoder on the end of the axis ballscrew and not the motor shaft. For me making these parts is part of the fun and lets me configure the machine to my preferences. Plus, I save a little money. You can get belts and pulleys from Mcmaster.com . I normally use encoder disks and sensors from usdigital.com . Here is Chris's Sherline example: http://timeguy.com/cradek-files/cnc/lathe/DSCN6295.JPG but I would change it by putting the encoder on the big pulley on the leadscrew. A motor driver can be as simple as: http://emergent.unpy.net/projects/01142347802 Others on the list should be better at suggesting a simple or cheap driver that would get you started. I am not a fan of steppers because they don't normally have position feed-back. When EMC commands a move, the number of steps and direction are sent to the stepper motor and it is assumed that the motor completes those steps. The performance of your system needs to be well tested so that you can set the stepping parameters so that the motors are never in a condition to lose steps. If you do lose steps, you often won't know until it shows up in your parts. With a servo system the encoder feeds back position information as a move is being made. EMC then corrects for errors. Also the encoder position information is used for the position display, so the position on the screen is the position of the machine. For a stepper, the position display is based on step counts, so if you lose motor steps, your display loses steps too. Encoders can be used with steppers but it gets complicated as to how to implement them. You should be fine with steppers. My Shizuoka mill has steppers (for a while) and they work fine. Tormach has a compelling argument for using steppers which is here: http://www.tormach.com/document_library/TD30204_DesignAnalysis.pdf Some people say that tuning servos is difficult and complicated, but stepper behavior changes dependent on load, system mass, and speed (frequency). If your stepper decides to misbehave at a certain speed or load, analyzing and correcting the problem can be more difficult because you don't normally have the feed back element and you have fewer options for correcting the problem. Usually you take a guess and then dumb down the settings for a safety factor. Given EMC's features, very little cost difference, and being able to build a usable system as time and money becomes available, I prefer brushed servo's. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) -
