Hello all,
I am using the Softmotion Servo example as instructed but I cannot get any more than the 60 to -60 degrees of motion to work. I try to set the servo config to 90 to -90 but it doesn't work. I have verified that these servos can actually move 90 to -90 with python PWM code.

Thanks in advance.

Anyone else out there able to get this example to work properly? Is there any other way to use PWM with CodeSys? I really only need to set my server to 2 different positions and don't really need any of the soft motion functionality.

hello,
I might suggest to modify SM3_Drive_Servo library.
This library use block from library I2C_AdafruitPWM.
In declaration area in function block block 'AXIS_REF_SERVO' you can find:

VAR pAdafruitPWM: POINTER TO PWM.AdafruitPWM; usiAxisIndex: USINT; lrMinPos, lrMaxPos: LREAL; lrMinPwm: LREAL := 1; lrMaxPwm: LREAL := 2; lrInitPos: LREAL;END_VAR

Try to change value in lrMinPwm to e.g 0.8 and lrMaxPwm to 2.2 ( you will need to find your own values probably).
after this save this lib and install and it should give you (hopefully) wider range.

LukaszBien hat geschrieben:
hello,
I might suggest to modify SM3_Drive_Servo library.
This library use block from library I2C_AdafruitPWM.
In declaration area in function block block 'AXIS_REF_SERVO' you can find:
Try to change value in lrMinPwm to e.g 0.8 and lrMaxPwm to 2.2 ( you will need to find your own values probably).
after this save this lib and install and it should give you (hopefully) wider range.

Thanks for the tip, I will try it out.

Please let me know your findings. Thanks