(To continue the hijack.)
I read about how this 'snakiness' is prevented in welded railtrack. It is installed stretched so temperature changes just alter the stress in the rail. Of course if the temperature goes too high the expansion overcomes the stretch and the raill buckles. Conversely, if it gets too cold the contraction imposes too much stress and the rail breaks. Both of which do happen but not frequently and the failures are normally found before a 280km/h train tries to go whistling by.
An open mind is a virtue...so long as all the common sense has not leaked out.
:) Current build: http://www.cnczone.com/forums/diy-cnc-router-table-machines/264838-new-machine-desing-quot-cnm13-quot.html
With my memory, it's going to need you to remember, but 1st Jan 2014 send me the code
John
It's like doing jigsaw puzzles in the dark.
Enjoy today's problems, for tomorrow's may be worse.
:) Current build: http://www.cnczone.com/forums/diy-cnc-router-table-machines/264838-new-machine-desing-quot-cnm13-quot.html
I'd already told mine.
"When will you have time....".
"In a couple of years ?"
"Perhaps...."
John
It's like doing jigsaw puzzles in the dark.
Enjoy today's problems, for tomorrow's may be worse.