Re: [CAD_CAM_EDM_DRO] software questions DRO

vlocci wrote:

>I'm just getting started on a conversion and have a few software
>questions that I haven't found answered in the archives. I'm inclined
>to keep the handwheels on my mill, since I plan on the occasional job
>done by hand.
>
>1) Assuming I use servo's with encoders, can I use the encoders as a
>source for positiong info that can be displayed within a software
>package as a DRO? Which software packages allow this? Is EMC my
>only choice?
>
>

I think Mach 1 and 2 may support this.

>2) Is the above possible with steppers instead of servo's? Can it be
>done without encoders? Which software allows this?
>
>

How can you measure position without encoders?

>I realize I'm limited by the accuracy of the axis ACME threads, I.e.
>backlash induced errors (a ballscrew conversion is in the future, but
>I want to get things running first)
>
>Realize that I dont necessarily need CNC capabilities and the option
>of manual DRO read out at the same time. (real time jumping back and
>forth) I'm only after the ability to either cnc a part automatically
>(hands off), or elect to manually do things with a computer driven
>DRO arrangement. Can this be done?
>
>

Yes.

>If it matters, I'm considering Gecko drives (either servo or stepper)
>but am open to a change if it offers me DRO capability.
>
>

You don't say what size machine you are planning on converting. But,
for the
larger machines, it may be cheaper to go with servos, if you plan on
using encoders
for DRO readout anyway. Also, sevo motors won't drag as much when you
move the machine manually.

Jon