On Sun, 2008-08-10 at 00:13 -0400, Jim Coleman wrote: > I've hooked the encoders to the parport right now just to see if I > could get that feedback working directly from the encoders to the > parport. My goal is to get closed loop motion out of my motors > without having to buy a card like a mesa. I think that if I can use > the PWM output to derive an analog Vcmd for the servo amps, I'll be > able to run it, slow enough for a parport to keep up with the encoder. > > I have the mill, the original control has been ripped out of it after > it had a runaway on Y during a tool change (Y and Z axes are mounted > on a gantry like, and X is under the table) > I've only been making enough money to pay the bills and keep the car > puttin along, so I havnt been able to invest any money into the m5i20 > and 7i33 combo, but I sure would love to be able to get it running at > minimill speeds with like $20 worth of hardware. buying 40 taper > tooling definitely wont be easy, I might end up turnin some of my own > if i have to.
An L298 (dual) h-bridge is ~$5.00 but is over kill for an amp input. Do you have a make and model number for your amps? What kind of 40 taper? CAT, BT, NMTB? http://www.tools-n-gizmos.com/specs/Tapers.html -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
