Re: [CAD_CAM_EDM_DRO] SeriesII Quill Zaxis CNC addon ideas: Like Jon E's?

I vote for number 4.
1 - That is how the machine is designed to work
2 - It is very accurate with no backlash (amazing what ground ballscrews
driving 1500 lbs or so of knee will do for you)
3 - It already moves fast enough to mess your britches
4 - The point is to produce parts not machine modifications

Tim
[Denver, CO]
Sherline products at Deep Discount (now Mach1 CNC controller too)
www.KTMarketing.com/Sherline

----- Original Message -----

> I was wondering if, in the future, it would be feasible to add
> a ballscrew mechanism to move the quill of my older seriesII model;
> where the knee is the Z axis. The quill at one time had
> the air-driven-spindle-wizard-rotary-depth-stop-thingy( technical
> term ) which I removed.
> The mill has a larger 4.25 diameter quill that is a little 'sticky'
> to move. A previous owner put way lube thru the quill I think at
> some point. It has has gotten easier over time as it works out.
>
> I remember seeing a picture of Jon's setup where a 'clamp' is
> attached at the end of the quill with a ballscrew to move it. I also
> saw on Ebay a mill just like mine, but they had some weird ballscrew
> setup on top of the head that appeared to work straight down the
> drawbar entry hole. My quill doesn't have the drawbar hole that goes
> all the way through to the tool holder. Its a quickchange type 40
> taper. Options I'm guessing at are:
> 1) Using the depth bar that moves in parallel to the quill ( sturdy
> enough? Offset force issues? ).
> 2) A clamp on the quill and several ballscrews to drive it up/down.
> 3) Something through the center of the quill. Probably disassembly
> and modification needed to the quill.
> 4) Just use the Knee and shut up :-) most likely what will occur.
>
> Thanks for any ideas.
> -Lee
>
>
>

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