Re: XYYZ Gantry

Hi Peter,
I built a small unit for writing on glass. The unit stuck
to the glass with four suction cups. The base was open so the Dremel
could go down through and hit the glass. I used a stepping motor and
screwrod on each side of the Y axis. After I lined up the motors they
stayed syncronized. If either motor goes out a couple steps the thing
will still operate. Your part will be off a little. Plotters use a
gear belt and pulley on both Y axis to keep them syncronized. The
motors get wired color to color.

John

--- In CAD_CAM_EDM_DRO@y..., Peter Chen <cadcamcenter@y...> wrote:
> XYYZ GANTRY
>
> Good morning,
>
> Asking for opinions on XYYZ gantry. I believe this
> configuration will involve having 2 lead/ballscrew and
> 2 stepper motors for the Y axis. Suppose one of the
> stepper on the y axis lose step. Does this mean that
> the x and y axis will no longer be perpendicular to
> each other? With this arrangement how does one ensure
> squareness?
>
> Thanks
>
>
> Peter
>
>
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