I recently purchased a RoboteQ SDC2150 2x20A, 50V Closed-Loop Brushed
DC Motor Controller.
I am having some problems of controlling the motor reliably from the radio.
I am using a Futaba radio set 9CHP transmitter, and R114F reciever.
The reciever is connected via the 15 pin connector, +5V, and GND to
one of the reciever channel to power the receiver.
I also tried power the reciever with an external +6V supply that is
ISOLATED from the +5V supply of the cotnroller.
Signal, GND of channel 1, and 2 of the receiver to DIN1 (RC ), and DIN 2 (RC2).
The VMOT, GND (power Stage), and the PwrCtrl, GND (logic stage) are
connected to SEPERATE 12V battery.
When the power stage is switched off, through the Roborun software I
can see the pulse is captured reliably with values of about 1000 to
2000 ms when I move the sticks around.
However, when the power stage is switch on, the captured value
fluctuates from 0 to the commanded value, and the motors just
stutter. The problem is worst with RC1. Since the DIN1, RC1, and DIN2, RC2, ANA2, I have disabled all the encoder, and analog voltage read function. I tried setting DIN to active high and also low, figuring there may be some resistance change on the pins but no change to the behaviour.
With only one channel disabled, the situation is better, motor sometimes still stutter at low trottle. Commanding the controller through USB works fine.
The current firmware I am running is v1.2 RCB100 10/19/2011.
Have anyone experience this issues and have a possible solution? Thank You very much