Hey Everyone,
I need a little help with the motorshield R3 and connecting servo's (SM S2309S) to the TinkerKit connectors "out ~5" and "out ~6".
I have a Mega2560 and I connected a servo (pin 5) using the Servo library and the examples provided with it.
All works fine also when I hook up a potentiometer (as in the Knop example).
But when I use the motorshield to conveniently connect my servo (I changed the wiring; signal in the middle) it does not work correctly.
The servo on "out ~5" changes abruptly moves from 0 to 180 degrees when I change the potentiometer 0 to full slowly. :~
I checked the schematics and as far as I can see the signal on pin 5 should be passed unchanged to "out ~5" on the shield (only Vcc and ground come from the shield).
I even hooked up a oscilloscope to analyze the signals.
This shows me the same abrupt change in the signal. 
The same happens on "out ~6".
And I even tried another servo (same type)
As said: without the shield all works as it should be.
Who can shed a light on this?
Thanks,
Jurgen