scale angle with pwm

engma

I don't understand why doesn't the H bridge work?!

What does the motor need to control its position, power supply switches and sensor for feedback. this job could be done by Microcontroller without need for big drive.

I attached electrical   drawing for h bridge with motor

 Good thinking engma,

You're on the right track but the circuit as shown will not work.  Have a look at this alternative schematic  and modify it to match the Arduino supply voltage. I assumed 24V input for Arduino pulse and direction but change it according to the specs and change the resistors accordingly.

This will help you use what you have at hand,your motor, Arduino, S7-1214c and make the best decision as to how to interface them and which technology object to use.

The circuit is untested!

Best of luck

Dear William, Kai

thank you for your help

I did the basic steps of commissioning as you advised me. and the leds light up.

then i created user program with MC_power and MC_home and MC_move absolute and it succeeded to light the led(%Q0.0) for a period then i changed the position value in  MC_move relative and the led lights for different period. 

I also displayed the output %Q0.0 on oscilloscope but it was continuous not pulses , is this normal?

now i want to complete configuration of the axis. How to use Hardware limit switches to stop the motor and reverse direction.?

Hi engma,

With all due respect, I just had to lough.

Did you read any of the replies?

Kal.A

Hi engma,

With all due respect, I just had to lough.

Did you read any of the replies?

 yes, I read all the replies , why do you want to lough ?! i did  commissioning as you said.

Hi engma,

Here's a summary of the 7 page thread so far:

1- Your motor is not a stepper motor which means you will not be able to "step" the motor. You can "pulse" it as you stated and have some degree of control over the effective voltage applied to the motor and thereby the speed (RPM).

You have to decide if that level of control is sufficient for you application.

2-"PTO" technology object provides two outputs, one pulse and one  direction. Your interface/driver will need to accommodate that and if it doesn't  then you can either modify/ change the interface, or read a couple of posts up, on this very same page,  William_B's detailed write-up of how you can use  PWM and multiple outputs to control motor direction using your arduino.

In this case you will be using a PWM not PTO and you will use duty cycle to control RPM and write code for hardware limits.

It's great that you were able to get PTO to work properly. That means that you now can focus on your hardware and the compatibility issues associated with it.

Cheers

Kal

Edit: have a look at this

I did not use pto with direction I used it with count up count down . The output as I said was continuous why? Why not pulses.

actually axis technology make it easy to do position control. if PTO won't work with my app. how to use PWM? or how to do position control?

if there is any drive that can work with PTO tell me and i will use it.

I appreciate your help.