Re: Question about steppers

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Will" <nmbmxer@y...> wrote:

>
> I dont feel that the wear from moving the lift up and down would be
> excessive, no worse than moving the quill around. They are polished
> shafts and I would assume that they bushings were bored as there is
> no deflection, it's quite sturdy. I think that with proper

lubricant

> they would be fine, the only hinderance would be speed. The only

time

> the z moves is to plunge in, hold, plunge out. I just dont see this
> machine as a highspeed machine, more of an automated one.
>
> My father said that he could make a circuit that would switch

bewteen

> two stepping motors, ie, I could write and m-code to switch between

a

> quill mounted motor for drilling and highspeed machining with a
> vertical ballscrew and the stepper driving the lift.

There is a caution about switching motors.

It is best done manually or automated with caution.

First remove power from it. then switch leads, then re-apply power

Don't use relays as if one contact fails, poof, there goes the
driver. That is unless you use the Gecko Vampire.

Dave