Re: Servo PITTMAN 9413D319 HOW can get experimentally motor parameter ….?

Here's how to get Kv and Kt for a mystery motor:

1) Connect the motor to a regulated power supply.
2) Power up the encoder.
3) Measure the encoder CH_A frequency with a counter.
4) Kv = 16.67 * VDC * line-count / freq
5) Kt = 1.351 * Kv

In (4) VDC is your regulated supply voltage, line-count is your
encoder line-count and freq is the frequency you measured from your
encoder.

Mariss




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Cesar Paredes"
<cesarparedesruiz@...> wrote:

>
> Hi:
>
> Thanks for your info
>
> I´m designing a PID for a servo that I´ve got from a garage sales.
>
> PITTMAN 9413d319,,,,3140-0665 REV. H,,,,19.1 VDC
>
> For modeling the motor I need to get the parameters of the motor
> followings:
>
> * moment of inertia of the rotor (J) = X.... kg.m^2/s^2….?
> * damping ratio of the mechanical system (b) = X... Nms….?
> * electromotive force constant (K=Ke=Kt) = X ...Nm/Amp….?
>
>
>
> I visited Pittman 's Web Site (data sheet not abailable), I checked
> HEDS-9000 (encoder HP), theory books…empty
>
>
>
> So, if you can give an idea how can I get experimentally the

parameters? I

> would appreciate your help.
>
>
>
> God bless you
>
>
>
> Cesar Paredes
>
> Lima Peru
>
>
> [Non-text portions of this message have been removed]
>