Homebrew PCBs

Chris,
Very nice machine you've made there.  
I'd like to know what you did about some anti-backlash
nuts on the 1/4-20 leadscrews?  Or are you just
planning on software compensation?
Thanks,
Ray

>I was talking with the guys over on Electronics 101
>about a small 
>project I was working on and what it turned into. 
>The details of the 
>CNC machine are here at this link.
>
>http://www.woodworkingathome.com/CNC/minimill.htm
>
>Hope you enjoy...
>
>Chris





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Hi Ray,

Actually, the nuts (Acetal) were made in my shop - I just tapped the 
material.  I WANTED backlash as I will need to test out that 
component of the software I am working on.  The bad part is, there 
isn't any measurable backlash.  I am sure it will wear in, but it 
sort of cramps the testing and development of that feature till it 
happens :-(

Chris


--- In Homebrew_PCBs@yahoogroups.com, r c <zortax23@...> wrote:

>
> Chris,
> Very nice machine you've made there.  
> I'd like to know what you did about some anti-backlash
> nuts on the 1/4-20 leadscrews?  Or are you just
> planning on software compensation?
> Thanks,
> Ray
> 
> >I was talking with the guys over on Electronics 101
> >about a small 
> >project I was working on and what it turned into. 
> >The details of the 
> >CNC machine are here at this link.
> >
> >http://www.woodworkingathome.com/CNC/minimill.htm
> >
> >Hope you enjoy...
> >
> >Chris
> 
> 
> 
> 
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com
>

>I am sure it will wear in, but it sort of cramps the testing and 
>development of that feature till it happens

Smear a lapping compound mix on the screws.


--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>
> Hi Ray,
> 
> Actually, the nuts (Acetal) were made in my shop - I just tapped 
the 

> material.  I WANTED backlash as I will need to test out that 
> component of the software I am working on.  The bad part is, there 
> isn't any measurable backlash.  I am sure it will wear in, but it 
> sort of cramps the testing and development of that feature till it 
> happens :-(
> 
> Chris
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, r c <zortax23@> wrote:
> >
> > Chris,
> > Very nice machine you've made there.  
> > I'd like to know what you did about some anti-backlash
> > nuts on the 1/4-20 leadscrews?  Or are you just
> > planning on software compensation?
> > Thanks,
> > Ray
> > 
> > >I was talking with the guys over on Electronics 101
> > >about a small 
> > >project I was working on and what it turned into. 
> > >The details of the 
> > >CNC machine are here at this link.
> > >
> > >http://www.woodworkingathome.com/CNC/minimill.htm
> > >
> > >Hope you enjoy...
> > >
> > >Chris
> > 
> > 
> > 
> > 
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around 
> > http://mail.yahoo.com
> >
>

Yeah, that would work!  


--- In Homebrew_PCBs@yahoogroups.com, "derekhawkins" <eldata@...> 
wrote:
>
> >I am sure it will wear in, but it sort of cramps the testing and 
> >development of that feature till it happens
> 
> Smear a lapping compound mix on the screws.
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
> <lcdpublishing@> wrote:
> >
> > Hi Ray,
> > 
> > Actually, the nuts (Acetal) were made in my shop - I just tapped 
> the 
> > material.  I WANTED backlash as I will need to test out that 
> > component of the software I am working on.  The bad part is, 
there 
> > isn't any measurable backlash.  I am sure it will wear in, but 
it 
> > sort of cramps the testing and development of that feature till 
it 
> > happens :-(
> > 
> > Chris
> > 
> > 
> > --- In Homebrew_PCBs@yahoogroups.com, r c <zortax23@> wrote:
> > >
> > > Chris,
> > > Very nice machine you've made there.  
> > > I'd like to know what you did about some anti-backlash
> > > nuts on the 1/4-20 leadscrews?  Or are you just
> > > planning on software compensation?
> > > Thanks,
> > > Ray
> > > 
> > > >I was talking with the guys over on Electronics 101
> > > >about a small 
> > > >project I was working on and what it turned into. 
> > > >The details of the 
> > > >CNC machine are here at this link.
> > > >
> > > >http://www.woodworkingathome.com/CNC/minimill.htm
> > > >
> > > >Hope you enjoy...
> > > >
> > > >Chris
> > > 
> > > 
> > > 
> > > 
> > > 
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam?  Yahoo! Mail has the best spam protection 
around 

> > > http://mail.yahoo.com
> > >
> >
>

> Yeah, that would work!

You could also try Petroleum Jelly (Vaseline etc.), it should wear only 
the Acetal nut (chemical not abrasive action). PJ will rapidly wear 
rubber and most plastics where friction is involved and probably will 
have the same effect on Acetal. It's the worst thing to use on plastic 
gears and rollers even though I've seen it recommended as a lubricant 
for such before. It also causes latex condoms to break and the combo is 
often the reason for many an unwanted pregnancy and the spread of STDs.


--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>
> Yeah, that would work!