Re: [taigtools] Re: Spacers?
- If you need just a little more extension than the tail stock spacer
provides, just add a shim plate behind the dovetail plate on the Z
axis saddle. Finding (or making) a small plate with parallel faces
is a lot easier than making a column spacer "donut", and won't lose
as much rigidity as a second tail stock spacer. Be sure to replace
the dovetail plate bolts with longer ones to allow for the added thickness.
= Rich =
>By the way, Russ, this is on top of the mod I copied from you about 18
>months ago. That works well, but the defining measurement is between
>the column and the spindle and as usual I want just a touch more than
>the tailstock riser can supply. I dismissed making a custom tailstock
>riser in a larger size as being beyond my current machining abilities.
>I have considered using two. I know rigidity will suffer no matter how
>I get the extra space, but is two risers any different or less rigid
>than one riser and a spacer in the column/table joint?
- You could always have somebody make one for you - for a price, of course.
The only critical part would be getting the faces exactly parallel.
I'd offer to do it, but the shipping from the U.S. to Australia would
be prohibitively expensive.
(I run a large, very precise conversational CNC lathe at work, and
have access to scrap ends of H11 tool steel.)
= Rich =
>I'd be prepared to sell my first born to the salt mines for another half
>inch (steady down the back). What would be an appropriate method of
>making such a spacer? I am imagining a piece shaped like an American
>doughnut. And what would the best material be? Would it need to be
>surface ground? I have done little general machining on my Taig so am
>reluctant to trust my skills with a fly cutter.
- I've done it on mine (older style Z ways, though.) I don't look at it as
a permanent deal, kinda like the headstock spacer on the lathe. If I need
the height, I'll shift and re-tram. If I need to machine on the table,
I'll shift back down and re-tram.
One other spacer worth mentioning is one between the Y axis motor mount
and the base. The leadscrew in Y is longer than it needs to be, and you
can buy almost an inch (or a little over an inch) this way. I don't leave
it on as a general rule, but it's got a spot in my toolbox.
The column spacer sounds interesting. It seems like no matter how you
work this rigidity would suffer (same way it does with the headstock
spacer.) Getting the faces parallel isn't bad if there's a shop in town
with a surface grinder. But drill the through hole first!
I'd be very very curious to hear how this works out. There's a surface
grinder at work, so I may be able to get a little instruction on it and a
column spacer to boot.
On Fri, 28 Apr 2006, Nicholas Carter and Felice Luftschein wrote:
> You mean the whole slide? It can be done but I think you would sacrifice
> the ability to machine items on the table...
> Rob Ferber wrote:
>> Pictures will take me a bit - I've got to clean the photos up a bit (and
>> learn how to take pictures...).
>> Ever thought of unbolting the Z bearing assembly and shifting it up one
>> set of holes on the Z column? That would give about 1/2" or so.
>> -- Rob
> felice@... is Nicholas Carter and Felice Luftschein. See our
> homepage at www.cartertools.com/nfhome.html
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