Thanks for the well written article. Now I have ANOTHER mod to do.
My Y table squeaks like crazy when turning the handle. This should solve
the problem.
Cheers,
Andrew
On Tue, 2011-09-06 at 15:53 -0400, SirJohnOfYork wrote:
>
> On 9/6/2011 1:14 PM, Bill Williams wrote:
> >
> >
> > Gerry, David, to answer the original question; the gears in a
> > printer
> > are probably Delrin or something similar in properties. Since a
> > gear
> > needs certain material behavior characteristics that are very like
> > those
> > of a thrust washer you should be able to use them. That is a good
> > idea BTW! Bill in Boulder
> >
> >
> >
> > __._,_._
> I used some 5/8" black round Delrin, also known as Acetal, as per
> explained here and sold here. .
>
> Here is an easily made black round acetal thrust washer on my
> mini-mill, positioned perhaps 1/4" in front of the shoulder of the
> leadscrew that it normally slides up against in this picture.:
> http://jzcomputer.com/Stuff/Mini-Mill/AcetalThrustWasher.jpg
>
> Without the thrust washer in place, the shoulder seen just behind the
> black washer above wears directly on the face of this piece, labled as
> a "Retainer, Y-Axis Screw" on LMS:
> Retainer, Y-Axis Screw
>
> I shamelessly "stole" this idea from David Clark and posted about it
> over on the Mini-Mills group, complete with links to his original
> posts back on this group, where he was offering free thrust washers at
> that time to anyone who wanted them while supplies lasted. Free. Did I
> mention free? Free is good. :-)
>
> In my case I'd impatiently forced the machine to go a bit farther on
> the Y axis than it should have gone in order to complete something I
> was working on. The y-axis leadscrew shown above plowed into the
> "Y-Axis Retainer" with some excessive force, which then made for some
> rough turning afterwards. Smoothing them out (that shoulder on the
> leadscrew shaft and the retainer) with some wet/dry sandpaper, and
> then adding the thrust washer made things operate much better and
> smoother than it did before the problem ever occurred!
>
> I highly recommend that all manual X2 owners utilize David Clark's
> thrust washer idea as per shown above. Cuts down on slack and makes
> the y-axis turn much smoother than before. Simple and quick to do.
> Mount and center a short length of delrin/acetal round bar in the
> mini-lathe (or vertically mount a short length of same in the mill
> vise and carefully locate the center), center drill a center hole
> sized to just fit over the shaft, and then part or otherwise cut off a
> ~ washer's thickness ~ from the end. Clean it up and mount it as shown
> way up above. Reassemble mill hand wheel and such. Done. Smooth hand
> wheeling ahead! :-)
>
> Cheers,
> John Z.
>
>
>
>
>
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