Hello Dave, thanks you For the reply. yes is more dificult to tune the servos, when you have a backlash in the cinematic, this is when reverse the rotation of the servos , the motion controler "espect" a movement to the commanded signal, but in this instant is take action the backlash, and not have movement to the axis (so the scales dont move).. and the PID pump more signal to the amp, in this moment the B.L. is zero , and drive the axis, so you have an overshooting , so tune it also come in account the mass driven by the axis and the amount of backlash!!!!
sure. i right now installing a dedicated Pc to explore the setup greetings. juanjo Monday, December 17, 2007, 2:50:32 PM, you wrote: DE> Hi Juanjo, DE> Once you get into a machine with servos, limit switches and a DE> servo'ed spindle the size of the machine doesn't make much difference. DE> Hopefully, your servo amps expect plus and minus 10 V as a drive signal. DE> I don't have specifics but there are people running large machines on DE> emc2. DE> As per previous discussions on this list if you have backlash on your DE> ballscrews then tuning the servo's is more difficult than when the DE> encoders are on the ballscrew. DE> http://webpages.charter.net/bengvall/emc/emcconversion.html DE> Good luck on your conversion. DE> Dave DE> On Dec 16, 2007, at 5:54 PM, [EMAIL PROTECTED] wrote: >> Hi Guys. >> I am Juanjo, and lived in Argentina South America. >> >> Well, some time ago i read the post and the features on the well >> done EMC2. >> and now i thinking to make a testing in my Machining center, (a big >> one) a >> Huller NBH-150. Basically a 4 axis horizontal milling machine with a >> gantry type tool changer robot. the Spindle is drive by a 40 hp. >> motor. >> >> The machine have a Brazilian made Maxitec CNC System3. (a sinumerik >> system 3) >> is a little aged for the news cncs. so i see in the links a guy >> retrofitting a Mazak mill so it have me encorage to thinking a >> intesive >> labor of this type in my machine. >> >> but i have a dude, due i see mostly hobby and small type of machines >> running EMC2, this is not as secured now to try in the big ones ?? >> >> Anybody see a EMC2 in a big machine running fine? >> >> the machine have X,Y,Z B, X1,Y1(robot) , C axis, the axis are >> driven by >> DC servos (BrowBobery) the x,y,z have linear scales, the others >> encoders, >> and for a idea the mass is 18Tn. and tha max amperes taked from the >> mains >> is 110 A in 380V x3. so is a little more than a desktop (i also >> doing a >> desktop mill, for hobby use. y casting tha whole machine in machine >> grade >> iron, i have a set of 3 casting.now i machined tha table of one, >> using the >> same dimensions of a Tslot of the unimat 3 milling table, to use the >> accesories of it). >> >> Well thanks by the advice, and sorry by my english is very poor! >> >> >> greetings. >> >> >> Juanjo >> >> >> >> >> >> >> >> >> >> >> ---------------------------------------------------------------------- >> --- >> SF.Net email is sponsored by: >> Check out the new SourceForge.net Marketplace. >> It's the best place to buy or sell services >> for just about anything Open Source. >> http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/ >> marketplace >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users DE> ------------------------------------------------------------------------- DE> SF.Net email is sponsored by: DE> Check out the new SourceForge.net Marketplace. DE> It's the best place to buy or sell services DE> for just about anything Open Source. DE> http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace DE> _______________________________________________ DE> Emc-users mailing list DE> [email protected] DE> https://lists.sourceforge.net/lists/listinfo/emc-users -- Best regards, juanjo mailto:[EMAIL PROTECTED] ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
