Re: [CAD_CAM_EDM_DRO] Sherline mill CNC mods?

>
> Hi all!
>
> I've added constant-force springs to counterbalance my Sherline's head
>
> (http://www.egroups.com/files/sherline/Head+counterbalance+springs/
> for any of you on the Sherline group)
>
> Next, I'm ready to tackle the conversion to CNC. It looks to me like the
> main mechanical requirements are
>
> 1) Preloaded bearings for the leadscrews--Sherline's motor mounts
> incorporate these, but it doesn't look like any of the other off-the-shelf
> conversions do.
>
> 2) Adequately-sized steppers--100+ oz-in, from what I gather.
>
> 3) Minimal backlash on the leadscrew nuts--since the Sherline is too small
> to retrofit ball or Kerk screws, it appears that making Moglice nuts for
> the existing screws might be the best way to minimize backlash.
>
> Does that cover it? I know that adding end-of-travel microswitches is good
> for peace of mind, but I'm thinking about the mechanism itself for now. I
> have the 5400 with spacer block and resettable handwheels, which I'll
> obviously keep...
>
> I'll appreciate any what-I-like-best-about-my-conversion or
> what-I'd-do-differently anecdotes too.
>
> Thanks!
>
> Randy