Re: New Member
- Maybe I'm missing something obvious, but why would cutting a ½ sphere be difficult?
I once made a wooden shift knob for my son on my manual Sherline lathe and CNC'ed mill. The turning on the lathe was mostly done with hand held gravers but I needed an accurate spherical geometry with a known radius for the top portion. (The actual radius was a required input for my shift pattern engraving).
I did this on the mill with a ¼ in ball nose end mill using a series of parallel cuts with small step overs. Actually did a criss-cross pattern, once in the X axis and then the Y. Gcode was hand coded with the help of Excel.
It turned out very nice.
--- In SherlineCNC@yahoogroups.com, Andy Wander <awander@...> wrote:
> Right, but you couldn't do that with 2.5D.
> Andy Wander
> -----Original Message-----
> From: SherlineCNC@yahoogroups.com [mailto:SherlineCNC@yahoogroups.com] On Behalf Of Bert TPSRR
> Sent: Tuesday, June 12, 2012 12:03 AM
> To: SherlineCNC@yahoogroups.com
> Subject: RE: [SherlineCNC] New Member
> Scott writes -
> Short answer, yes, you can cut half a sphere.
> You'll need a rotary table and a boring head.
> There may be another way to do it that I am unaware of.
> - - -
> Set the X and Y steppers to move the stock in a reducing-radius circle (think of
> an old Hi-Fi record) and slowly bring the Z head up. You'd have to smooth it
> out, but that would cut a hemisphere.
> Yahoo! Groups Links
- --- In SherlineCNC@yahoogroups.com, jayb wrote:
>Be aware that a certain "troublesome" member of that group may try to lure you into a group of his own. Which may suit you, I don't know, but it's not a Sherline group.
> I've recently retired so finally have some time to pursue new hobbies.
> The Sherline equipment looks especially interesting and it looks like
> many knowledgeable people post here.