Howard Chan wrote: >[snip] >I use SANYO DENKI servo motor which has an 2000 ppr internal encoder and >max rpm is 3000. The motor mounts a 16T pulley and connects a 36T pulley. >http://myweb.polyu.edu.hk/~icwfchan/p2.png >36T pulley mounts a lead screw which is 4 turns per inch >http://myweb.polyu.edu.hk/~icwfchan/p3.jpg > >According to Integrator manual, my calculation is: >INPUT_SCALE=2000 * (36/16) * (4 /25.4)=709 >but the computer displays x-axis value is not the real-distance value. >I try and error to find the value round 1250 > >Would you mind telling me which part is wrong? > > It sounds like you have 3600 count encoders, not 2000. The rest of your math is correct as far as I can see.
Try this: set the INPUT_SCALE to 1000 Leave the motor disconnected from the screw and put a mark on the pulley Jog far enough to make the pulley move 1 turn (by eye at least, more accurately if you can) This will tell you whether the motor is moving as far as you think it is. If it is, you should check the table movement by measuring how far it moves when you turn the screw 1 (or 10) turns. You probably don't need to re-count the pulley teeth :) - Steve ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
