Brakes.

Over time i have picked up a few servo motors. All in hopes of repairing a mill I have. I have noticed some have brakes and some don't. Does the Linux CNC support a brake on the servo? Is it something needed?

Thanks,

Jeff

Brakes are often needed for the Z Axis of VMCs so the
Z axis doesn't coast down into the table at power off/servo disable

jeffie-3 wrote:

Over time i have picked up a few servo motors. All in hopes of repairing a mill I have. I have noticed some have brakes and some don't. Does the Linux CNC support a brake on the servo? Is it something needed?

Thanks,

Jeff

You can use the signal "machine-is-enabled" to release the servo brake. But normally the brake is connected to the servo drive, when the drive is enabled it releases the brake.

The couple of motors I have. Have separate wires coming off the brake.

jtc wrote:

jeffie-3 wrote:

Over time i have picked up a few servo motors. All in hopes of repairing a mill I have. I have noticed some have brakes and some don't. Does the Linux CNC support a brake on the servo? Is it something needed?

Thanks,

Jeff

You can use the signal "machine-is-enabled" to release the servo brake. But normally the brake is connected to the servo drive, when the drive is enabled it releases the brake.

So the brakes only engage when the machine is "Parked" and or turned off? So if I am making a 4 inch cut on the X axis. The Y and Z are held by the motor holding position and not by engaging the brake?

jeffie-3 wrote:

jtc wrote:

jeffie-3 wrote:

Over time i have picked up a few servo motors. All in hopes of repairing a mill I have. I have noticed some have brakes and some don't. Does the Linux CNC support a brake on the servo? Is it something needed?

Thanks,

Jeff

You can use the signal "machine-is-enabled" to release the servo brake. But normally the brake is connected to the servo drive, when the drive is enabled it releases the brake.

So the brakes only engage when the machine is "Parked" and or turned off? So if I am making a 4 inch cut on the X axis. The Y and Z are held by the motor holding position and not by engaging the brake?

This is the typical situation, so yes.