> From: Mark Johnsen [mailto:m...@ijohnsen.com]
> KB electronics is good stuff. Similar to the Minarik DC drives.
> Industrial rated...
>
> Don't know about the reaction time for closed loop, but you could call them
> and I'd think their apps engr would have some idea... My experience
> (probably limited) has not seen those types of DC drives closed loop to
> position, but I would think you could close loop to speed w/ LinuxCNC, but
> how quickly to ramp back to desired speed is the question.
>
> Mark
On some of them the data sheets say there are trim pots for adjust acceleration
etc. So I think they are probably pretty solid devices. Are they perhaps
targeting blower and conveyer motors where speed regulation doesn't have to be
perfect?
Still other than the "please request quote" rather than an online shop and
price list they appear to be pretty good. Again I guess it depends on what
you want to control.
Back when I was testing various sensors I turned this disk with that 555 Timer
PWM circuit and a small surplus 12V DC motor. The little project board beside
it converts the TTL into RS-485 if there's a noisy environment.
http://www.autoartisans.com/ELS/photos/SlottedOpto-RS485.jpg
One could even use the LMD18245 as a bridge to control a motor up to about 48V
and 3A.
John
>
> On Tue, Oct 20, 2020 at 1:20 PM John Dammeyer <john.damme...@shaw.ca> wrote:
>
> >
> > > -----Original Message-----
> > > From: Dave Cole [mailto:linuxcncro...@gmail.com]
> > > Sent: October-20-20 1:04 PM
> > > To: emc-users@lists.sourceforge.net
> > > Subject: Re: [Emc-users] driver for a DC motor for a BS-1.
> > >
> > > What about using a common KB Electronics DC drive?
> > > Woot.com (Amazon discount site) is selling one for $89.? I think they
> > > can commonly be found on Ebay as well.
> > >
> > > Dave
> >
> > I looked at their web site. (google KB Electronic DC drive). Seems like
> > pretty nice stuff although I wonder if they would react fast enough to a
> > closed loop control. If that was even wanted. One of the drives does
> > support tachometer feedback.
> >
> > John
> >
> > >
> > > On 10/19/2020 5:22 PM, grumpy--- via Emc-users wrote:
> > > > On Sun, 18 Oct 2020, John Dammeyer wrote:
> > > >
> > > >> Way back in 2003 I started a project to control the surplus tread
> > > >> mill motors I had acquired.? At that time I was still just casting
> > > >> parts for making my Gingery Lathe and thought about making my own DC
> > > >> Servo motor controller.
> > > >>
> > > >> http://www.autoartisans.com/MotorDrives/MOTOR1-5.JPG
> > > >>
> > > >> The first prototype had a bunch of problems and then regular paying
> > > >> work took over, I needed the bench space and never revived the
> > project.
> > > >> http://www.autoartisans.com/MotorDrives/REVA0059.JPG
> > > >>
> > > >> The controller was the MC33030
> > > >>
> > > >> http://www.autoartisans.com/MotorDrives/MC33030-D.pdf
> > > >>
> > > >> Knowing what I know now I'd never use this device but back then...
> > > >
> > > > i have a 1 hp treadmill motor i need a controller for
> > > > in view of you past experience what would you use now
> > > >
> > > >
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