MCU servo controller (2)

Last night starting the servo controller matching with servos (Per Victor advise, the computer comm port problems fixed by remove the bluetooth driver). the IDE program come back to normal now.

During the mapping process, I found TowerPro servo specification is variance.

1) I got 10pcs almost 8months ago, the cable color is 'Black/Red/white'. By using this kind of TowerPro servo, I need not add a pull up 10K resistor to Vcc, but found this kind of servos could not lock at precise position like Parkinson syndrome (some servo can, not all). Another 10pcs was brought couple months ago and the servo cable is 'Brown/Red/Amber'. This type of servo even cannot work properly with servo sequencer but add a 10K pull up resistor can be overcome (Per R-Wu advised).

2) Since the controller and IDE console is base on Futaba servo standard, If you replace it by TowerPro, I may recomended you doing the following

a, On the IDE Console , each servo of the min and max limit of servos is "0 to 155" (this is base on my visual observation only), if you move the slide to 180, the servo might has risk to burnt. You can modify the 'servo-limits.ini' and manually adjust the min/max value. Enter the console and press ' Range' button then the min/max value can be updated

b, Add the pull high resistor 10K between servo signal pins and +Vcc (see above photo, this is the extra board I have made) This can help to overcome the servo shaking and TowerPro not work problems.

3) Because some other board for robot also need 5V supply, so I change the 7805 to a large power type as above

Today most probably I can finished the servos mapping and then will use IDE programming some motion to exercise the servos. Then will try using 'HyperTerminal' to send the data to servo controller without IDE conosle. If this can be success, will apply the Inverse Kinematic to control it. But I anticipated there should has a lot of difficulties waiting for me!