Homebrew PCBs

Hi John,

I know you have been upset about this whole thing for some time now. I 
don't know what you expect of other people though. Realistically, your 
machine designs use crude, commonly available  materials. Just because 
you printed on paper the idea of using cheap window channel for a 
guideway does not give you sole rights to use that idea.  Nor does the 
use of extremely crude gas/water pipe for other machine components.  
Anyone can use any of those materials in anything they wish to, 
including a CNC machine. 

If you look back through woodworking magazines for the last 20 years 
or so, you will find numerous uses of the cheap aluminum extrusions 
for a variety of jigs and fixtures.  In many cases, it was used as a 
guideway.  Assuming those published drawings predate yours, then in 
essence you ripped off them of their idea.

Using gas pipe and or water pipe is another "hacked together" framing 
material used for innovative purposes long before you used it on your 
machine.  As it is easy to obtain, it has been used for many other 
purposes including as an axel for a turntable type device published in 
a woodworking magazine many years back.  It is used as a "hidden shelf 
hanger" device and I am sure many other unique applications.

I don't know if you expected the world to bow down to you for all 
machine designs using similar materials, but if so, you were not being 
realistic at all.  Sorry to sound so harsh, but you seem to want to 
claim rights to things that you have no right to claim.  If someone is 
photocopying your drawings and reselling them, call the authorities as 
you would have something to complain about.  But complaining about 
people showing similar uses of similar materials is just unrealistic.

Chris



--- In Homebrew_PCBs@...m, "crankorgan" <john@...> wrote:
>
> Stefan,
>        Lets see him produce plans without the window channel. The
> window channel was my epiphany! He mounted the motor and bearing
> plates on the channel the same way! The Z axis Gas pipe etc. I guess
> if I stole your car and repainted it, that would be ok with you? 
> 
>                                           John