Re: [CAD_CAM_EDM_DRO] How to test a servo motor without servo dri ve?

Quale, Robert wrote:

>Why would a burst of DC erase the magnets. Doesn't the motor start with a
>burst of current on a regular basis?
>
>
>

Yes, but it is electronically limited by the servo amp. Manufacturer's
literatureis real specific about this, even a few microsecond pulse above
the peak cuttent rating will damage the magnets.

Servo motors often have very low inductance and resistance, so applying
full DC supply voltage to a stationary motor can cause destructive
currents to flow until the motor develops some speed.

For instance, with a 70 V DC supply, and a 1 Ohm motor resistance,
connecting the motor directly to the supply will cause an instantaneous
70 Amps to flow. But, using the servo amplifier, it reduces the applied
voltage as soon as the current reaches the limit.

Jon