Thanks for the info on mounting the encoders. I decided to go with the mesa 5i23, those ebay amps, keling motors, and the digikey encoders.
I'll let everyone know how it works out when everything gets here. Thanks everyone for all the advice, it would have been impossible to choose a combination without everyone's input. sam sokolik wrote: > http://www.electronicsam.com/images/KandT/pcbmill/bldcenc2.jpg > > The keling servos I got (also the KL23BLS-115) have 2 very shallow > tapped holes that line up to the mounting holes of the encoder. > I found some laptop assembly screws that just happened to be the right > length. Mariss seems to love these encoders over the cheap us-digital > ones for his step/dir servo drives.... > > YMMV > > sam > > > On 1/7/2010 03:36 PM, Flying Electron wrote: > >> 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 >> >> >> > > ------------------------------------------------------------------------------ > 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
