Re: [CAD_CAM_EDM_DRO] how to safely stall a DC motor

Lance Hopper wrote:

> I'm in the process of completely retrofitting an Emco Turn 120 cnc
>lathe. It's got an 8 position tool turret on a ratchet mechanism,
>driven by a small DC gearmotor (24VDC ~15watts) through a worm gear.
> Would it be feasible to simply control the motor with a DPDT relay
>that supplies 24VDC for forward operation, and then supply 5VDC and a
>resistor of some value for reverse/stall operation?
>
> I'm not an electronics guru, so designing and building a circuit
>would be very time consuming and difficult for me. I'll be
>controlling everything with Mach 2. Thanks for any advice.
>
>

Yes, this should work fine. But, I think you need one more relay to turn it
off. It doesn't really keep the motor stalled ALL the time, does it?
Or, just
long enough to get the tool firmly seated?

Jon