On Fri, 2008-07-25 at 01:13 -0500, Jon Elson wrote: > 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? > > > I can see another problem with this. Your MPG will start > spinning on its own when the machine is running, unless you kill > the force feedback unless the MPG is in control of the machine. > It still makes me think it might runaway when you take your hand > off the dial. > > Jon
I was thinking of having a standard 100 units per revolution knob, but the encoder would have maybe a thousand units/rev. One feature would be a bias away from middle counts so that without touching the knob, it would align with a cent mark. The output would only increment on a cent mark. Then the load feed-back could scale the cent mark bias. A damping factor might be needed to keep the wheel from oscillating as well as hysteresis. On the other hand, so what if the wheel or wheels turned on their own as long as they stay in sync with the axis position? -- 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
