Re: 3D printer, motor reversing

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Alan KM6VV" <KM6VV@...> wrote:

>
> Hi Graham,
>
> Just a thought, isn't the paper feed motor a stepper? Then wouldn't the
> driver for the stepper likely have a direction input? It may be

"tied low"

> or something, but it may be worth looking for.
>
> Alan KM6VV

Origionally I was using an epson which did have a stepper on the paper
feed for just that reason however it turned out the controller was
serial command based and there were no step and direction signals to
intercept.

The HP uses a DC servo motor and an encoder for both print head and
paper feed.

Graham