Re: [CAD_CAM_EDM_DRO] Re: Stepper motor speeds

Bryan,

I wanted to point out something I found out about voltage.

I am running CamTronics board with the L298 driver, driving 23 frame motors at 90oz. I have a Power Supply that was feeding 38v into the steppers. Had a problem with missing steps on my y axis. I
decided that I was getting too much feedback inductance when the motors were slowing down, causing a lost of steps. It took some observation to see the motor skip only when slowing down. I lowered
the voltage to 33v and was able to gain control of my y axis.

I am unable to provide you with a max on my motor speed, as I am still testing and have not tried to set the speed to the max.

Bruce

Bryan Mumford wrote:

> My motors are rated for 3.2 volts at 2 amps, driven with 24 volt choppers.
>
> Higher voltages are a problem for small, low-cost tools. The Xylotex
> drivers (3977 chip) max out at 35 volts, and the SLA7044 chip I'm
> using is similar.
>
> I'd be very interested in hearing from others who use 23 frame motors
> on small tools. What step rates are you achieving?
>
> Is anyone getting substantially more than 3300 steps per second, and
> if so, what kind of driver are you using?
>
> --
>
> Bryan Mumford
> Santa Barbara, California
> http://www.bmumford.com