Wow! Thank you so much for the link. The amps on ebay looks pretty much exactly what I am looking for. I looked at the datasheet for the issue with the drive inputs being commoned at +5V like you pointed out, but I'm pretty sure I can hack up something to deal with that, like run the signals through a microcontroller to do whatever translation is necessary. I especially like that they are all mounted in a nice box for me already :-)
Getting closer. Mesa card + Servo Amps are picked out. Keling motors look good. Do you know if that amt102-v encoder need anything special to mount on the back of a NEMA 23 brushless motor like an adapter plate or anything like that? Or do encoders and motors have standard mounting patterns so that all encoders fit all motors nicely? Yesterday I had no idea what I needed to buy or even what questions to ask, and today everything looks doable. sam sokolik wrote: > there are always deals if you are patient. Like... > *KL23BLS-115* <KL23BLS_115.pdf>*: $52/pcs brushless servos > digikey amt102-v encoder 29.95. <-up to 2048 line - adjustable. > ebay 3 amc amplifiers that take pwm+dir > http://cgi.ebay.com/3-AXIS-A-M-C-PWM-Brushless-SERVO-AMPLIFIER-ASSEMBLY-NEW_W0QQitemZ260516353589QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ca7fc1635 > 179.95 > > Not including shipping for 3 axis... (not including mesa hardware) > $425.80 > closed loop - priceless... ;) > > You would want to do your homework though - like the drive inputs seem > to be common-ed to +5v. (probably not an issue) > (if I did the math right) > sam > > > * > On 1/7/2010 01:29 PM, Flying Electron wrote: > >> I'm deciding on what servo drive to use with the mesa FPGA card and it >> doesn't look too bad since there are not too many low cost options. I'm >> constrained to a NEMA 23 size motor since a NEMA 23 stepper is on the >> machine right now and I want it to be a direct swap. So far I've found >> from searching on google and from people's suggestions here on the >> mailing list: >> >> Drives >> ------- >> [brushless] Pico Brushless PWM Servo Amp $150 >> [brushed] Pico PWM Servo Amplifier $125 >> >> Motors >> -------- >> [brushless] Pico Size 23 Brushless Servo (61ozin continous, 180ozin >> peak, 1000 CPR) $120 >> [brushless] Keling KL23BLS-115 Brushless Servo (61ozin continous, 180 >> ozin peak, 1000 CPR) $134 >> [brushed] Keling KL23-130-60 Brushed Servo (50ozin continous, 350ozin >> peak, 1000 CPR) $162 >> >> Not Suitable >> ------------- >> dmm-tech.com -- RS232 based communication not PWM >> gecko -- EMC2 cannot control PID loop (step/dir input, not >> pwm) >> viper -- EMC2 cannot control PID loop (step/dir input, >> not pwm) >> rutex -- EMC2 cannot control PID loop (step/dir input, >> not pwm) >> >> Most of the servo drives I have found have the PID loop built into >> them. Is this the normal case? >> >> Is it possible to run a brushed DC servo with just a simple H-Bridge >> controlled directly by the PWM output and a direction signal? I was >> looking at the Freescale MC33886 which I think could make a very simple >> and cheap H-Bridge. >> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MC33886VW-ND >> <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MC33886VW-ND> >> >> Anybody know of any companies or products I may have missed in my search? >> >> >> >> >> ------------------------------------------------------------------------------ >> This SF.Net email is sponsored by the Verizon Developer Community >> Take advantage of Verizon's best-in-class app development support >> A streamlined, 14 day to market process makes app distribution fast and easy >> Join now and get one step closer to millions of Verizon customers >> http://p.sf.net/sfu/verizon-dev2dev >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> > ------------------------------------------------------------------------------ > This SF.Net email is sponsored by the Verizon Developer Community > Take advantage of Verizon's best-in-class app development support > A streamlined, 14 day to market process makes app distribution fast and easy > Join now and get one step closer to millions of Verizon customers > http://p.sf.net/sfu/verizon-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
