On 10/20/2009 08:05 PM, Kirk Wallace wrote: > On Mon, 2009-10-19 at 20:25 +0200, Thomas Kaiser wrote: >> Hey >> >> Does anybody on this list use the "UHU Servocontroller" >> [http://www.uhu-servo.de/]? >> If so, what are the experience with this? What motors you are using? >> >> I am just interested at anything somebody did with this ;-). >> >> Thomas > > In my opinion, step/direction servo motor controllers are not ideal for > EMC2, since the motion control (PID) and position feedback is built in > to EMC2. For servo's, a PWM or analog input driver is better. With this > kind of driver, you will have access "under the hood", allowing you to > tune and customize your system through EMC2's HAL. Many step/dir > controllers only have a separate Windows program for tuning. > > UHU is a do-it-your self project, so if you want to build something > yourself this may help: > http://www.electronicsam.com/images/KandT/servostart/schem/ > > Or you can copy a reference h-bridge design from one of the chip > manufacturer's data sheets. When you get into the higher power motors, > you will need to allow for current limit control, FET shoot-through, and > fly-back currents. Usually, it is better to purchase higher power > drivers.
Hello Kirk I try to give new life to an old Schaublin lathe. On this lathe the NC controller died. Everything else seems to be OK. So, I am trying to replace the old NC controller with EMC, which worked so far for the X-Z axis :-) The old NC controller just sent pulse and direction signals to the drives. But as far as i can tell, the motors are DC motors with encoders and look more like servos. These drives are still working and I hooked up EMC in stepper configuration (parallel port) which works :-) My goal is to just replace the NC controller and use as lot as possible things which are still working. I just was thinking what would happen when one of the drives dies (no spare parts available anymore). It would be handy to replace the dead drive with something similar, keep the old motor and the "old" stepper (parport) configuration. I think UHU Servocontroller would be a good alternative. Here is a link from the same machine I am working on. But they replace everything with a new Siemens control. I will stay with EMC! http://www.wfrauenfelder.ch/LAP2005/LAP2005.htm The 2 first pictures are with the old controller and drives. Thomas PS: I am an electronic engineer, so no problem with DIY projects ;-) ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
