mycnc:mycnc_pulse_width_setup
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mycnc:mycnc_pulse_width_setup [2019/04/24 13:32] – ivan | mycnc:mycnc_pulse_width_setup [2020/01/27 10:52] – ivan | ||
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====Selecting the Appropriate Pulse Width for your motor==== | ====Selecting the Appropriate Pulse Width for your motor==== | ||
- | A common procedure required for proper motor operation is selecting the appropriate pulse width for the signal going from the controller to the step/servo motor on the CNC machine. As seen in the following instructions from Panasonic' | + | A common procedure required for proper motor operation is selecting the appropriate pulse width for the signal going from the controller to the step/servo motor on the CNC machine. |
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+ | As seen in the following instructions from Panasonic' | ||
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====Pulse Width Calculations==== | ====Pulse Width Calculations==== | ||
- | *Choose the speed at which your machine will move in **[meters / minute]** | + | *Choose the speed at which your machine will be moving |
*Convert the **[meters / minute]** speed with which the machine will move to the number of **[revolutions / second]** of the screw/ | *Convert the **[meters / minute]** speed with which the machine will move to the number of **[revolutions / second]** of the screw/ | ||
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The value for the number of [steps / revolution] will be equal to 7812.5 steps/ | The value for the number of [steps / revolution] will be equal to 7812.5 steps/ | ||
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*As discussed earlier, the value selected on the stepper motor must be equal or smaller than the number of **[steps / revolution]** obtained from the previous step for the motor to register the signal and function properly. | *As discussed earlier, the value selected on the stepper motor must be equal or smaller than the number of **[steps / revolution]** obtained from the previous step for the motor to register the signal and function properly. | ||
- | *//For example, if the **[steps / revolution]** value has been calculated to be 7812.5 steps/ | + | *//For example, if the **[steps / revolution]** value has been calculated to be 7812.5 steps/ |
*Using the **[revolutions / second]** value and the updated stepper driver **[steps / revolution]** value, calculate the actual **[seconds / step]** value of the motor. This actual **[seconds / step]** value will always be equal or higher than the minimum allowable **[seconds / step]** value of the motor due to selecting a lower **[steps / revolution]** value in the previous steps. | *Using the **[revolutions / second]** value and the updated stepper driver **[steps / revolution]** value, calculate the actual **[seconds / step]** value of the motor. This actual **[seconds / step]** value will always be equal or higher than the minimum allowable **[seconds / step]** value of the motor due to selecting a lower **[steps / revolution]** value in the previous steps. | ||
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- | + | *The value for the **Pulse Width** in myCNC software must be set to be equal or to the next closest value that is higher than the actual **[seconds / step]** value of the motor. | |
- | *The value for the **Pulse Width** in myCNC software must be equal or higher than the actual **[seconds / step]** value of the motor. | + | |
*//For example, if the **[seconds / step]** value was equal to 9.76 μs/step, and an ET6 or an ET7 board was used, 12 μs would be selected from the chart in the **Common Hardware Settings** tab as it is the closest value that's higher than 9.76 μs// | *//For example, if the **[seconds / step]** value was equal to 9.76 μs/step, and an ET6 or an ET7 board was used, 12 μs would be selected from the chart in the **Common Hardware Settings** tab as it is the closest value that's higher than 9.76 μs// | ||
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*The 12 μs corresponds to Setting 7 in the chart, thus the **Pulse width** value should be set to 7 in myCNC software. | *The 12 μs corresponds to Setting 7 in the chart, thus the **Pulse width** value should be set to 7 in myCNC software. | ||
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*The pulse width setup is now complete. | *The pulse width setup is now complete. |
mycnc/mycnc_pulse_width_setup.txt · Last modified: 2024/01/22 11:05 by ivan