[ODE] Hinge problem

[Michael Scharvogel]

hi folks...

I build up a small test robot. As a matter of fact i am far from that and
still trying to build the robot model. Like with an ant the legs shall be
segmented. For a first try I have six legs but only two hinges per leg.
The first part of each leg is connected to the body and its hinge can move
between -45 and 45 degrees (yes I am using rad for the ode stuff :-)

The next part of each leg can move up and down. The corresponding hinge is
limited by 0 degree as low stop and 70 degree as high stop.
I build the whole thing up at a hight of 2 and let it drop down on the
floor.
It's working just fine. But after lying on the floor for a short while, my
bug seems to get bored and stands up...
That would be just fine if only I had told it to do so...
It seems to me, that the up / down hinge try to achiev their hi limit
position...
But why ????

Any comments on that ?

cya&bfn, mike.