RE: [CAD_CAM_EDM_DRO] Small distance measuring

Hi Daniel,

Maybe optical? Open loop Stepper motors? Closed loop servos?

What precision do you need?

Alan KM6VV

>
> Hi,
> I'll build an XY table and on Z axis I'll move an printing head - as a
> sword of serigrafic machine.
> But distance from head nossels to material to be printed should be
> approx 1mm.
> What tehniques could I use in order to measure whith precision such a
> small distance ?
> The only method that I know for measuring distances it is with
> ultrasonic emiter-receiver but it seems that this is for bigger
> distances.
> I have seen on an laser engraving machine that optical head is moving up
> and down pretty precisely what method they are using ?
> Thanks,
> Daniel