Re: servo vs stepper

Thanks Tim,

I kind of knew you would have the answer. Another question for you.
How do you know where your running a motor? I could be running the
servo at the continuous place, or I could be somewhere in between the
continuous and peak? I know that when I run my jobs on the mill the
motors remain cool to the touch. I have not ever felt them even
warm. This has always baffled me, every motor that I have used
before (AC only) has gotten warm to the touch after use.

Jeff Davis
[Portland Or,]

--- In CAD_CAM_EDM_DRO@y..., "Tim Goldstein" <timg@k...> wrote:
> ----- Original Message -----
> > That is exactly what I thought as well. I'm not an electronic
> > engineer so what does it mean "Continuous" and "Peak"? It sounds
to
> > me that the motor can change it's torque when needed (up to 430
oz/in)
>
> The difference between peak and continuous is much like it sounds.
You can
> run the motor at the continuous torque all day long and it will not
harm the
> motor. Peak torque is the maximum the motor can output for a brief
period of
> time. There is a duty cycle associated with the peak torque and if
you start
> to exceed it than the motor will start to overhead and cause damage.
> Probably a good rule of thumb is to not use the peak more than 10%
of the
> time.
>
> Tim
> [Denver, CO]