Re: [Emc-users] Newly updated Ubuntu 8.04 kernel.
Another option is to remove the generic kernel completely (if you can do all tasks with the rtai kernel). If you started by installing with the LiveCD, then you won't have it on your system. The case Ray described only applies for people who started with a stock 8.04 Ubuntu, and then installed emc2. sudo apt-get remove linux-image-generic (I think that's the meta package which depends on the latest kernel). Regards, Alex - Original Message - From: Ray Henry [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Wednesday, May 28, 2008 03:04 Subject: [Emc-users] Newly updated Ubuntu 8.04 kernel. If you are running 8.04, Hardy Heron you need to be aware that Ubuntu has released a new kernel. When/if you update to this kernel you will be advised to reboot. It's the little pair of blue arrows up near the stuff in the top right corner of the Gnome window. When you update, it will modify the GRUB bootloader's configuration so that when you reboot, this new kernel will be the default and you will not be able to run EMC2 unless you change things just a bit. This note is from Jeff. jepler now that the -17 kernel is out from ubuntu, I think a lot of people are going to run into problems at their next reboot (the new ubuntu kernel will be chosen over the rtai kernel). I don't have time right now, but can someone write a message to the users list explaining how to select the right kernel at boot time so that emc can be run? You can probably catch the GRUB menu if you're awake when the reboot starts. Simply press the esc key quite a few times while it reboots. And tab down when the menu shows. You need to run the kernel named Linux version 2.6.24-16-rtai rather than the new 2.6.24.17 so that EMC2 will have access to the proper modules and such. But that is a nuisance so Jeff's next suggestion is probably the correct way to fix this for now. jepler unfortunately without editing grub's menu manually I'm not sure how to change the default to be the rtai kernel.. First let's make a backup of the proper configuration file. Do this by issuing the following command in a terminal sudo cp /boot/grub/menu.lst /boot/grub/menu.lst.backup When you press enter, you'll be asked for your user password. Once you enter that it should make the backup for you. Now we need to find your favorite editor. If you'd rather not use Gedit, ignore the startup stuff here. Open a terminal and enter this command. sudo Gedit /boot/grub/menu.lst You'll be asked for your password if this is not the same terminal you used to make the backup or if the password has timed out. Enter it and the gedit widget will fill up with a bunch of stuff. Most of it you can ignore but down near the bottom of that file you will see several blocks of stuff that looks a bit like this. title Ubuntu 8.04, kernel 2.6.24-17-generic root (hd0,0) kernel /boot/vmlinuz-2.6.24-17-generic root=UUID=55655b37-adf7-4806-928a-cdbe2b889492 ro quiet splash initrd /boot/initrd.img-2.6.24-17-generic quiet and down a way you should find. title Ubuntu 8.04, kernel 2.6.24-16-rtai root (hd0,0) kernel /boot/vmlinuz-2.6.24-16-rtai root=UUID=55655b37-adf7-4806-928a-cdbe2b889492 ro quiet splash initrd /boot/initrd.img-2.6.24-16-rtai quiet This kernel is the one you want to use to run the EMC2 software so we need to point GRUB to it. To do that, count each block, look for the word title at the start of a line. Count starting with zero until you get to the title line that shows the -rtai. On mine that is 2. (the third block) Your setup may well be different because you might have dual, tripple, or more boot or some such. Now you need to move up near the top of the file to a line that reads something like this. default 0 and change that line to read like this. default (insert the numerical value you counted to here) On my box that line reads like this. default 2 Now immediately below that are a couple of handy things you might want to also thing about changing. The first is the timeout for the menu. timeout 5 Put the time you need to come awake in there if you are dual booting. This one pretty much explains itself. Just put a (#) in front of the hiddenmenu line and it will always give you the menu for the time you set above. ## hiddenmenu # Hides the menu by default (press ESC to see the menu) hiddenmenu For right now, DONT SCREW with the rest of the file. You can do that later when you feel adventurous. Hope this helps folks around the problem I had not long ago. Rayh - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net
Re: [Emc-users] ini.fiiles
I know I,m missing something very simple here but: If I set max speed to equal feed speed the motors freeze on rapid moves. With max speed about 15 they just about start turning. If I set max speed to 20mm/s the motors do rapids move but do not go to the right position. There is also a reluctance for all motors to move in positive direction at lower max speeds All this also seems to happen in Mach3 Unless anyone can figire this out I am going to rewire the drivers and power supply with shielded cable and fix them to an aluminium base. Aaron - Original Message - From: Dave Engvall [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] ini.fiiles Date: Tue, 27 May 2008 15:37:38 -0700 Notice that he is stalling on rapids so his max velocity is too high: but the procedure below should tell him where to set it. :-) Dave On May 27, 2008, at 3:05 PM, Alex Joni wrote: Aaron, another way to try this: start with the old config (speed at 10 mm/second). Do a series of tests with increasing F-words (G1 X100 F100, G1X0 F150, etc..) Notice when it starts to fall apart, and let us know the speed. The ini should hold about 80% of the value divided by 60. Regards, Alex - Original Message - From: aaron Moore [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc- [EMAIL PROTECTED] Sent: Tuesday, May 27, 2008 11:00 PM Subject: Re: [Emc-users] ini.fiiles Rayh I just set the velocity to 4 and acceleration to 4. Feed moves are okay, but the motors just freeze on rapid moves, and I'm tearing my hair out, and the wife is about to divorce me. Thanks Aaron - Original Message - From: Ray Henry [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc- [EMAIL PROTECTED] Subject: Re: [Emc-users] ini.fiiles Date: Tue, 27 May 2008 09:58:16 -0500 Hi Aaron As I see it the problem is that your config runs the rapids much to fast for the ability of your hardware. MAX_VELOCITY = 10.0 Means 10mm per second or 600 mm per minute. If you lower that to MAX_VELOCITY = 4.0 your rapids will run about 240 mm a minute. Since that is not much faster than your feedrate you should be okay. But I would not be afraid to play with the numbers until you discover a combination that moves the machine about 80% of the speed at which you begin loosing steps. HTH Rayh On Tue, 2008-05-27 at 14:27 +, aaron Moore wrote: Between 100mm and 200mm a minute Aaron - Original Message - From: Kenneth Lerman [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] ini.fiiles Date: Tue, 27 May 2008 08:52:04 -0400 Alex, as usual, identified a key question. Just to expand a little, it is important because rapids (G0) use the maximum velocity; but cutting (G1, G2, G3) use the last specified Fword as the velocity. Generally, that will be much slower than the maximum. So, to repeat Alex's question, what feed rate are you using? Ken Alex Joni wrote: What feedrate do you use for cutting? Regards, Alex - Original Message - From: aaron Moore [EMAIL PROTECTED] To: EMC userslist emc-users@lists.sourceforge.net Sent: Tuesday, May 27, 2008 10:24 AM Subject: [Emc-users] ini.fiiles Hi Could someone have a look at my ini. files to see if I am missing something. Still have the same problem with my stepper router system. Cutting moves seem to go okay, but rapid moves screw the plot up completely even when max vel and max acc are the same as cutting speed. I am going to rewire drivers and powersupply with shielded cable and fix them to an aluminium backing board, but in the mean time do these files look okay? Also steppconfig wizard still will not test my axis although it will change config files. http://www.quickfilepost.com/download.do? get=647fa4e602ea153fa1399379c64108ba http://www.quickfilepost.com/download.do? get=d576ac74852a64a2873d1f43bdd26279 Thanks to all Aaron - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Kenneth Lerman Mark Kenny Products Company, LLC 55 Main Street Newtown, CT 06470 888-ISO-SEVO 203-426-7166 - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008.
[Emc-users] Power Supply. was Re: ini.fiiles (aaron Moore)
Aaron, Try splitting the power supplies, one to x, one to y and z ummm, Z and side to side, other to the big heavy gantry alone. If it's also happening in Mach then it's prolly power supply. I looked up those power supplies, they are switch mode, as opposed to chunks of transformer. Copper and Iron are your friends. I tried a switching supply on my router and it acted crazy, worked on one axis at a time but on multi axis moves it would stutter and stall. Dan P.S. My first machine was a hell of a learning curve. I think I made every mistake possible. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] AXIS display
Hi,
Another question - is it possible to make AXIS show more than one rotary
axis? I'd like to show an axis parallel to the Z axis - whatever that
would normally be called {C?)
Thanks
Ian
--
Ian W. Wright
Sheffield UK
-
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Re: [Emc-users] ini.fiiles
At 06:45 AM 5/28/2008, you wrote: I know I,m missing something very simple here but: If I set max speed to equal feed speed the motors freeze on rapid moves. With max speed about 15 they just about start turning. If I set max speed to 20mm/s the motors do rapids move but do not go to the right position. There is also a reluctance for all motors to move in positive direction at lower max speeds All this also seems to happen in Mach3 Unless anyone can figire this out I am going to rewire the drivers and power supply with shielded cable and fix them to an aluminium base. Aaron May have been mentioned before but that (low speed reluctance) sounds like classic stepper motor resonance problems to me. Do your drives have any adjustments for tuning that out? I have seen a half step unipolar drive where on phase was weak and when accelerating up to speed the motor would sometimes switch directions and end up running (very rough) in the wrong direction. __ Andre' B. Clear Lake, Wi. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] g-code driving me loopy...
Hi, Could someone please give me a little tutorial on using do/while loops in g-code please or, at least, point to me to a tutorial on the web while I have obviously missed in several hours of trawling the 'net. I'm trying to write a simple gearcutting program where I can mount the blank on a rotary axis and traverse the cutter back and forth on the X-axis a given number of times. I'm wanting to make the script 'universal' so that I can just insert numbers into variables for number of teeth, length of X travel, depth of each cut, and total cut depth but I seem to be getting my brain in a twist trying to figure out how to write the loops. I know that, if I was bright, I should be able to figure this out easily and maybe even write an interactive GUI but, today at least, I'm not and I need to get this part made ASAP!! ( a house full of grandchildren doesn't help either :-( ) Thanks, Ian -- Ian W. Wright Sheffield UK - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] ini.fiiles
http://www.quickfilepost.com/download.do?get=647fa4e602ea153fa1399379c64108ba http://www.quickfilepost.com/download.do?get=d576ac74852a64a2873d1f43bdd26279 ini files for servo setups also have acceleration settings in the [TRAJ] section, something like this: DEFAULT_ACCELERATION = 80.0 MAX_ACCELERATION = 100.0 are these not needed for stepper systems? or is stepconf leaving them out for some other reason? Anders - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power Supply. was Re: ini.fiiles (aaron Moore)
or even watch a multimeter on the voltage when running a program, and see if it's dropping. On Wed, May 28, 2008 at 7:59 AM, Daniel Kavanagh [EMAIL PROTECTED] wrote: Aaron, Try splitting the power supplies, one to x, one to y and z ummm, Z and side to side, other to the big heavy gantry alone. If it's also happening in Mach then it's prolly power supply. I looked up those power supplies, they are switch mode, as opposed to chunks of transformer. Copper and Iron are your friends. I tried a switching supply on my router and it acted crazy, worked on one axis at a time but on multi axis moves it would stutter and stall. Dan P.S. My first machine was a hell of a learning curve. I think I made every mistake possible. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] g-code driving me loopy...
Ian W. Wright wrote: Hi, Could someone please give me a little tutorial on using do/while loops in g-code please or, at least, point to me to a tutorial on the web while I have obviously missed in several hours of trawling the 'net. I'm trying to write a simple gearcutting program where I can mount the blank on a rotary axis and traverse the cutter back and forth on the X-axis a given number of times. I'm wanting to make the script 'universal' so that I can just insert numbers into variables for number of teeth, length of X travel, depth of each cut, and total cut depth but I seem to be getting my brain in a twist trying to figure out how to write the loops. I know that, if I was bright, I should be able to figure this out easily and maybe even write an interactive GUI but, today at least, I'm not and I need to get this part made ASAP!! ( a house full of grandchildren doesn't help either :-( ) Thanks, Ian -- Ian W. Wright Sheffield UK Following is my generic-gear.ngc: % #1=25(number of teeth) #2=[360/#1](angle to turn chuck) #3=-.1(y clearance) #4=-.05(X start of cut) #5=2.2(X end of cut) #6=0(starting A position) #7=.7(feed rate infeed Y axis) #8=.394(depth of cut) #9=15(feed rate across X axis) g0x#4y#3 g0z0 g0a0 m3s70m8 o200 do g1y[#8-.04]f#7 g1x#5f#9 g1y#8 g1x#4f1.5 g0y#3 g0x#4 #6=[#6+#2] g0a#6 o200 while[#6 lt 359.9] m5m9 % Notice that it does a rough cut across then climb mills back for a finish cut. Following is my generic-spline.ngc: % m6t0 g43h0 #1=27(number of splines) #2=[360/#1](angle to turn chuck) #3=-.1(y clearance) #4=-.05(X start of spline) #5=5(X end of spline) #6=0(starting A position) #7=3(feed rate) #8=.088(depth of cut) g0x#4y#3 g0z0 g0a#6 m3s200m8 o200 do g1y#8f#7 g1x#5 g0y#3 g0x#4 #6=[#6+#2] g0a#6 o200 while[#6 lt 359.9] m5m9 % Simular but does all cutting in a single pass. Both are using a cutter on an arbor in a vertical spindle. Ed. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
