Jon Elson wrote: >Andy Holcomb wrote: > > >>Does anyone know the price an encoder that would work on this machine >>with emc and not made out of gold? >> >> >> >I have been buying my encoders recently on eBay in the $20 - 50 >range, new in factory box. But, BEI, Dynapar and such make >affordable encoders. Some are listed in the Digi-Key and Mouser >catalogs. > > >>Will the geckos run these motors? and are they good with emc? I am >>trying to get an idea of the cost to retro fit it. >> >> >Assuming DC brush motors with common specs, yes. But, you may >want to use an encoder feedback board and a servo amplifier, >rather than a Gecko-type step/direction drive. For instance, >precise homing may be harder with a Gecko 320 drive, as it >powers the encoder, but you need to at least get the encoder >index signal to the computer to refine the home position. > >My Universal PWM Controller board is $250, it supports 4 axes. >Wire the encoders and index signals, plus home and limit >switches to it. I make PWM servo amplifiers for $125, they >handle up to 20 A and 120 V (I have a special version for up to >160 V). There is a spindle DAC option for $50 that can control >a DC spindle controller or AC VFD to set spindle speed. > >So, for basic lathe functions, it will run $250 + 2*125 + 50 = >$550. You likely will need additional I/O control points for >your tool turret, etc. although the controller has 16 digital >inputs and 8 SSR positions for output. This board functions as >a break-out board, so nothing else is needed to hook it up. > > Jon can you clarify more on the above I/O info it confused me, do I need more I/O or is yours enough? Andy
>If you want to keep the servo amplifiers (might be a good or bad >idea depending on the make and condition) I have the PPMC board >set that has DACs to drive the +/- 10 V signals they take. This >runs $780 but you get to use the existing servo amps. > >Jon > >------------------------------------------------------------------------- >This SF.net email is sponsored by DB2 Express >Download DB2 Express C - the FREE version of DB2 express and take >control of your XML. No limits. Just data. Click to get it now. >http://sourceforge.net/powerbar/db2/ >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
