Servo Driver

  
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To hook up the three Pot connections you will firstly need to establish the tags and the positions that I refer to. If you take the pot and look at the back of it, then make sure that the tags are at the top of the pot, then; The only thing that will happen if you get them wrong is that the servo will not respond correctly to your commands and when you power

it up it will wind all the way to one side and stay there. If this happens then reverse the connections to Pot A and C and all should be fine. Pot B is always the middle. To hook up the motor + and -, you simply need to look at the back of the servo motor and there will be a red dot on the positive side. Hook this to the Mot + and the other to the Mot -. Some servo`s have and additional capacitor across the terminals of the servo motor, you can remove this if you want, the circuit has a capacitor on the PCB to do the same job. Now check that you have not soldered over the tracks and that all components are in the correct spot. Also use a Multi-Meter set at a low Ohmage and test on the backside on the PCB to make sure nothing is shorted out. You can use the schematic as a guide to which parts of the circuit should be connected to which other parts. Remove all servo drive gears from the servo, making a note of how they came off and where they fit (take a photo if you have a digital camera). This should only leave the drive gear from the Servo Motor and the pot shaft left in the servo. Take a spare battery pack and through a connect it directly to the servo. You will need and adapter to do this, I just use short bits of left over wire from the resistors to make the bridge. Please make sure you have the polarity right i. e. ; Black servo wire to the negative side of the battery and the Positive Servo wire to the positive side...



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