Re: Stepper controller / driver for powerfeed

I would have to disagree. A simple DC motor, even with a speed control, will
slow down under a load. A stepper motor is the only kind of motor that will
maintain its speed under load without some kind of feedback (up to the point
where it begins to stall, i.e. missing steps.) If you need constant speed, a
stepper motor is the simplest way to get it.
--
Phil Mattison
http://www.ohmikron.com/
Motors::Drivers::Controllers::Software

----- Original Message -----
From: Fred Smith <imserv@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, October 01, 2007 6:13 AM
Subject: [CAD_CAM_EDM_DRO] Re: Stepper controller / driver for powerfeed
>
> How are they lacking for a power feed unit? A DC motor will
> precisely repeat the same speed in both directions. A stepper motor
> is overly complicated for a power feed unit.
>
> A variable speed drill motor with a locking trigger could be a good
> solution for this size lathe, depending on the lead screw and low
> speed torque on the drill motor.
>
> Fred Smith - IMService
> http://www.cadcamcadcam.com
>
>