Kirk Wallace wrote: > Has anyone done a jog wheel with force feed-back for detents and/or axis > load? It would be nice to have a jog wheel or quill lever to do "manual" > drilling or cutting. Do any of the current commercial CNC's have this? > > Jon, is there any test point to get a load signal from your PWM amps? >
Not really, but kinda-sorta, if you don't mind serious digging and hacking of the amps. There are two current sense resistors, one in each leg of the full bridge. One or the other senses current depending on which way the Dir signal is set. The resistors are .005 Ohm, so the voltages are quite small. 20 A gives 100 mV output. You would need to rig up op-amps to amplify these voltages and then add them together, to get a signed magnitude of the motor torque. Jon ------------------------------------------------------------------------- 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
