Re: Rutex servo drivers compared to servos to go?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "bob_quale"
<Robert.Quale@c...> wrote:

> What is the difference between the Rutex and Servo to go servo
> driver? They both get feed back? With the servos to go it seems

you

> need to use a power amplifier, but with the Rutex all you need is a
> power supply? Does anyone have any expierience with either of

these

> for servo use? HELP
>
> Bob

Bob: All of the Rutex drives (with the exception of the 997A) are
step and direction to servo controllers. They are similiar in
concept to the Gecko 320/340 series. Rutex offers a wider line of
models with higher voltages and currents than does Gecko.

The Servo to Go cards are true Servo amps that close the loop within
the software controller. The Rutex and Gecko take standard step and
direction signals from a PC parallel Port and using internal
circuitry close the loop at the motor controller.

Let's discuss the pluses and minuses of each approach:

With the true servo cards (Servo to Go) the control is more tightly
integrated with the software and the software is involved in directly
controlling the motors so there is the possibility of smart velocity
control and instant recognition of a path problem. Since they are not
dependent on pulses from a PC they do not have the same kind of top
speed limitations.= PLUS

Because they are required to be used with software that will do
closed loop they have a limited set of software controller options. =
MINUS



With the step and direction to servo controllers (Rutex and Gecko)
the controller software is unaware of the true position of the tool
and only stops sending pulses when the fault output from the drive
trips = MINUS

Most of the hobby grade software (TurboCNC, MACH2, DeskCNC) used for
Controller applications is of the Step and Direction variety. There
is a wide range of choices for control from a PC parallel port using
DOS, Windows or Linux. = PLUS.

I have both Gecko 340's and Rutex controllers on two different servo
machines. When tuned properly and used within spec they seldom if
ever fault.

Hope this helps with your evaluations.