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

Two wires are the AC input of Drive 250 VAC, The other
two wires are shorted at the motor , the other end of
the motor is connected to the Ground.
The response of this drive is very slow and it is
causing troble in the form of large following error,
any suggestion to improve the Drive's response? what
if I connect the two wires that are short at the motor
to the two ends of motor instead of connecting the
motor's one end to the ground?

Why the line reactors are needed with servo dynamics
drive? I understand that these are simple inductors
(am I right?)What is the selection criteria for these
reactors?

Regards

Babar

--- Jon Elson <elson@...> wrote:

> 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
>
>
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