Chris Morley wrote: > You could have classicladder send position commands to a stepgen. How > did mach3 handle the missed steps? Could you put an encoder on the > stepper motor?
You don't need an encoder, but you do need a way of "homing". There are 8 turret positions, so they're 45 degrees apart. Let's say you need to move 5 degrees backwards to be guaranteed that the thing is seated properly. All you do is go forward 45 degrees (plus a little so you're sure to be past the next tool stop), then back 5. Actually, it's forward "a few", forward 45*num_tools_to_skip, back 5. You essentially have homing on every pocket because the lock prevents the motor from moving the turret past "home" every time. - 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