Hi Patrick Glad to hear that you've got it going and are using it. Last first, I ran some tests recently of the backlash comp stuff. Backlash comp is a tradeoff at best. You want it to kick in quickly when you move around a quadrant while milling so that cutting forces don't offset the tool before comp can get there. You don't say how much comp you are using but if it's more than 0.001 IMO it's to much.
I loosened up an axis on my Sherline and ran with 0.005 and the handwheels made quite a jump. Then I used halscope to watch both the sloppy and a good axis while making a 45 degree move. Backlash compensation has a mind of it's own. We are certainly open to study and suggestions about a revision to the code that does this. Tool change. Whenever I do these, I use the INI file variable to move to tool change position, then I loosely set the new drill bit into the chuck or collet and slowly move the Z down to where I've got a standard "top of part" chunk of metal. After the Z has pushed the drill into the holder, I tighten it there and resume. That way I don't have to fight tool length each time. Rayh On Sat, 2007-02-24 at 09:25 -0500, Patrick Giasson wrote: > First post here, I hope I don't mess up :-) > > > I began using emc2 for my little PCB milling about a month ago. It's > great! It works very well, and best of all I can use networking of linux > to get files, as opposed to floppy and DOS with turbocnc. > > I have a little question though. When comes time to drill my PCB, the > CAM programs tries to use many drill size and so I must change tools. > For this, I must manually change the drill. I tried to put a M0 > immediately after the M06 command to give me time to change the drill. > The problem I have is I just can't get the program to continue after the > M0. The "Run" button on the Tkecm interface start back from the > beginning, "Resume" seems to work only with "Pause". In the manual, it > is said that one must use the "Cycle Start Button" to continue after a > M0 or M1 command. Where is this button?. If I take a look at the > "demo_mazak" project, there is mention of this, but I just can't find > where is the linked pin to the HAL interface. They create a signal, then > link this signal to a hardware pin, but not to a "software" pin. > > Am I missing something? > > Ah, and while I'm here. Is there any way to slow the backlash > compensation? I have little backlash in my mechanical device and when > changing direction, the axis "bang" at what seems maximum speed to > compensate for backlash. I'd prefer a smoother action. Is it possible? > > > Thanks > > Patrick Giasson > > > ------------------------------------------------------------------------- > 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
