I have been having occasional strange behavior making
small parts on my
cnc router and think I finally figured out what is causing it. I
thought
it was miss-feeds or just about anything else but have almost
certainly
determined that there are (fortunately occasional) blocks of wood
that
are unbelievably hard, almost impossible to cut. I discovered this
today
and am using a SouthEast tool 1/4" down spiral bit that is almost
virgin
so it is not the tool.
The spindle boggs down and then all hell breaks loose while moving
with
no cutting action. Or at least I think this is what is happening.
quick
estopping resetting the machine and starting over confirms that
the wood
is in fact very difficult to mill.
I am using an xbox controller that has plenty of spare
buttons so I configured the big 4 way toggle button to be feed
hold.
I did not want to use feed hold because I thought there was a
warning
about resuming from feed hold. But I tested it and it seems to
work correctly
When I get the first indication that a piece of wood is like a
stone, I hit
the feed hold button on the xbox, set the feed to 40% and hit run
again.
Then before running the next part I set it back to 100%
Wouldn't you know that right after implementing this I ran into a
wooden
rock and the method worked.
It has been years since I set up the VFD spindle controller and I
sort
of think that I have it halt on overload. Maybe I should turn that
feature off and hope it powers through at a slower speed? Seems
like a
pretty awful idea to me?
Any opinions of screwing around with the spindle fault settings?
