Re: Head Relief

Randy,

I remember when you first described these mods and thinking that the
benefits were intuitively obvious. The balancing of the motor/head
would reduce binding caused by the cantilevered stock Sherline
configuration and the counterbalance springs would further reduce the
load and resultant wear on the lead screw/saddle nut assy.

However sometimes I catch myself using about two fingers worth of
downward pressure on the head to force the backlash (stock Sherline
lead screw/saddle nut) in the downward direction. This is to prevent
the mill from grabbing and digging in i.e., taking up the backlash.
Oddly enough, this suggests ADDING additional weight to the head to
force the backlash to always be in the same (downward) direction!

Would be interested in hearing your comments, pro and con, based on
your experience in actual use.

Thanks,
Al


--- In CAD_CAM_EDM_DRO@yahoogroups.com, Randy Gordon-Gilmore
<zephyrus@r...> wrote:

> At 03:13 PM 12/19/02 -0500, j.guenther wrote:
>
> >Look in the files section for "Randy's CNC Sherline Mill", all the
> pictures
> >and information is there. The constant force springs are

available from

> MSC
>
> Also in the Sherline Yahoo group is a folder with my first version

of the

> spring assembly. It still lets you rotate the head, while the final
> version took into account the spindle motor being behind the column.
>
> Best regards,
>
> Randy
>
> Randy Gordon-Gilmore ,----.___________ ______________

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