Giant milestone this week with our CNC router. +Jason Brown
has been relentlessly pursuing getting our beast of a CNCR (5'x10' bed) dialed.
Trying to get as much mechanical backlash (http://en.wikipedia.org/wiki/Backlash_%28engineering%29
) out of the machine itself is a challenge that has taken many months. Once you have done the best you can on the physical machine's consistency, there are options in the CNC software to compensate.
This is the path that came to an abrupt success Thursday. We had worked on re-tensioning the X and Y axis belts from what we think was some break in loosening. Cutting a standard pattern for troubleshooting for the 3rd time, we were scratching our heads as to what to try next.
The software backlash compensation was the key. Jason entered what he thought the backlash was we were experiencing from the test cuts into LinuxCNC. As we cut the fourth time, we were jaw slack at the results. About as close to a perfect pattern as we could ask for! Did a little dance.
We've upgraded numerous parts over a year at least, with some with help from the community (THANK YOU) and including a long interruption for the bot arena build. We are looking forward to some fun projects now that this is dialed for accuracy.
Some flat pack furniture being high on the list. (see: www.opendesk.cc
Congrats and thanks to Jason for his diligence and patience.