Thanks Dave ! i'm looking for nema 23, the supplier at that link you send only has huge motors, and I just realize that a stepper (like the ones I have on the machine now) is a brushless motor and it possibly could be driven like that (2 phase?), I think i better go with the regular DC motor for now... Anyhow I like to think and I think an optical mouse looking at the linear gear might make a great linear readout, almost good enough to close the loop a valuable bit closer to the target tool! I bet real linear encoders take this out of the range of affordable... so back to the subject...
On Wed, Aug 10, 2011 at 7:27 PM, Dave <e...@dc9.tzo.com> wrote: > On 8/10/2011 9:39 PM, andy pugh wrote: > > ot that I have ever used one. Step-Direction servo drives are a > > kludge mainly aimed at the Mach3 market as an easy upgrade to > > steppers. > > > > Many commercial servo drives now offer a step and direction interface as > it is easy to use that to control a servo drive via a PLC. > > The Gecko drives close the loop internally inside the drive just as the > industrial servo drives do (although most industrial drives are much > more sophiticated.) > > If you want to go with new brushless servo motors and drives, the TECO > drives and motors from Machmotion are a bargain IMO. They are very > similar to the Automation Direct Brushless servo drives but much cheaper. > > > http://machmotion.com/cnc-products/drives-motors/teco-servo-drives-and-motors.html?SID=c9618861b7239d4c9f615fff286ed361 > > I installed the TECO 1 KW, 2000 rpm motors and drives on two machines > last year. One machine is packaging machine and it is running over 16 > hours a days right now, cycling at least 20 times per minute. Two of > the drives reverse direction through the machine cycle - servo hell! > It has been running a minimum of one shift per day for about a year > right now and they have not had any drive or motor failures, but they > have replaced the gearboxes on the machine twice in the past year. > > The Teco drives have both a step and direction interface and an analog > interface built in. They can also operate in torque or velocity mode > when used as an analog controlled drive. > > Dave > > > > > ------------------------------------------------------------------------------ > Get a FREE DOWNLOAD! and learn more about uberSVN rich system, > user administration capabilities and model configuration. Take > the hassle out of deploying and managing Subversion and the > tools developers use with it. > http://p.sf.net/sfu/wandisco-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Tobias Gogolin Tel. Movistar (646) 124 32 82 Tel. Telcel (646) 160 58 99 skype: moontogo messenger: usert...@hotmail.com First Bitcoin Account: 1LCupcVd8HhAGyVhd3xayPpnQHeis7rAiV Blog: http://zeitgeistensenada.blogspot.com/ You develop Sustainable Ranch Technology at http://tech.groups.yahoo.com/group/SURA-TECH an Open Source Electric Motor/Alternator at http://groups.yahoo.com/group/Performance_Axial_Flux and an Open Source Motor Controller at http://groups.yahoo.com/group/GoBox ------------------------------------------------------------------------------ Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
