Re: [CAD_CAM_EDM_DRO] Pancake servo motors?

Hi, these motors are great piece of work, however the rotor made much the
same as a printed circuit board for light weight. these motors can not take
overloads well, since the rotor will warp and hits a magnet usually
grounding the driver circuit. Running them to or below spec's provided my
manufacturer will provide long life. These motors generate hi power levels
of back-emf and you must limit how much power when braking or changing
speeds and or direction...cul brian f.

----- Original Message -----
From: "bsptrades" <bspunkar@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, June 10, 2002 3:46 PM
Subject: [CAD_CAM_EDM_DRO] Pancake servo motors?


>
>
> Hi all I have been exploring various refits and following along with
> various threads bu I
> don't see anyone mention the ironless type pancake motors.
>
> For electric controls we have been using the ironless pancake style
> motors exclusively
> for years now. These motors such as the Kollmorgen servodisc or
> Infranor motors would
> seem also ideal for high performance servo systems on machine tooling.
>
> The rotor design provides almost zero cogging , very long brush life
> in brushed models due to the low inductance, very high acceleration
> rates and peak torque. It also seems the flat package would just look
> nice compared to a big long servo motor sticking out in some
> applications.
>
> Does anyone have experience as to why these type motors are not
> appropriate I really don't see a down side other than the diameter
> and non NEMA mount which would seem easy enough to get around?
>
> Anyhow just a question as there are a lot of experienced folks out
> here.
>
> Brian S Punkar
> BSP
>
>
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