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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.
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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.
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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.
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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.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
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.
Thanks for the tip, I will try it out.
Please let me know your findings. Thanks