Re: [CAD_CAM_EDM_DRO] Machine flex; How much is to much?

>
> Group,
>
> I have just completed converting a mill/drill to cnc. It has a belt
> driven spindle with a round column. For the z-axis I replaced the
> riser casting with THK LM slides that now allow the mill to have
> about 11" of travel. There are a couple of reasons why I did this.
> First is that 5" travel is too short most jobs that I run, second is
> that when boring using the quill there is too much flex resulting in
> elliptical holes (same applies for side milling).
> Currently I have not measured the amount deflection but I will
> attempt to very soon.
> My question is to the group what amount of cutter/spindle deflection
> is acceptable on this type of mill that still provides reasonable
> accuracy and good repeatability?
>
> Trevor