Re: [CAD_CAM_EDM_DRO] Please help Permanent Magnet Field Servo Motor???????????

Babar wrote:

>Hi All,
>
>Can anyone give me some info about "Permanent Magnet
>Field Servo Motor" Is this a AC servo or DC sevo?
>
>I have these motors (from Gettys) in a milling , I
>want to change the SCR drives with Servo dynamics DC
>drives, can I do this?
>
>There are 4 wires going to the motor from Drive.
>
>

Hmm, odd. What are the 4 wires? The label seems to indicate
it would be a brush servo motor, and only need 2 wires.
One more might be a safety ground. It is also common
to have a temperature sensor in the motor to put the drive on
reduced current if the motor gets hot.

Can you check if these wires are connected together at the drive
end? Sometimes they run 2 pairs of 2 wires in parallel, because
the cable can bend more easily. In this case, a 4 brush motor
may have each brush connected to one wire. Opposite brushes
on the motor are connected together at the drive end.

Jon