Chris, would think you would be able to connect the 0-10v output from a BOB directly to the controller middle leg output of the potentiometer. You wouldn’t need the hot leg, but would likely need to ground the bob to the controller.
On Mon, Jun 1, 2020 at 12:13 AM Chris Albertson <[email protected]> wrote: > My cheap Harbor Freight mini mill has a variable speed spindle that is > controlled by hand with a knob on the front of the mill. This knob turns a > potentiometer. I think all mini mills work like this. > > Has anyone interfaced the potentiometer to LinuxCNC? I don't have the > schematic for the spindle motor controller but I assume the potentiometer > imply > sends a control voltage to control the duty cycle of a PWM generator. The > motor is a simple DC brushed motor > > It seems I could use the 0 - 10 volt output from a breakout board (with > posible voltage conversion) to control the speed of the spindle. > > Then I place an encoder on the spindle. > > Has anyone made a simple interface that replaces the potentiometer? > > I don't want to rplace the spindle moter and use a VFD. I think this > shold be very simple and low-cost. > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
