Thank Tim, for a good presentation, I am somewhat puzzled by the apparent dissimilarity between the content and the title of this video. The title says "Do Motion with the Micro820 PTO Pulse Train Output Instruction", but the content shows a PWM instruction rather than a PTO instruction. Am I missing something here? Thank you again for a good video. Fethi Lakhdari.
It has to do with the more common question. People usually ask, what can you do with the Micro820s PTO output since they saw it in the specifications They don't yet know what a PWM is. Also, when people think PWM, they usually think some type of motion control such as step and direction. The Micro820 can't do that. Here's a video on the Micro850's PWM being used for motion control. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rMVIuYhvr9g.html
¿Which mark is the stepper driver that your using to control the stepper? I got another question i can center point with the stepper position or a need in fact the encoder for exact position or both. Best regards. 🤝🏻
Tim, could this be used to specify a burst of a certain number of pulses? The clearpath servos use burst mode, so this could make for a neat motion controller.
Awesome Video! Tim, I know some of the Stepper Drivers have an output option for Tach(Pulses per revolution). Can this me like a simple encoder to determine distance traveled and rate of speed? Thanks!
The PTO, like most simple steppers, don't use encoder feedback. Some of them have stall detection but for the most part the "assume" that the motor has moved to the correct position.
Can I do this without using Stepper motor driver? can I control the position of the rotation of the stpper motor by just using the PTO/PWM instruction? thank you so much sir.
@@TimWilborne So sir, all stepper motor should have a driver? thank you so much sir. even if it is only 12v? this is for my school project sir. thank you
Hello Tim, I have the Allen Bradley Micro 850 PLC CPU, 2080-LC50-48QWB, what would be the espasion module that I had to buy to program PTO and PWM signals? Thanks a lot
@@TimWilborne thanks Tim but my PLC dont have a motion control output, I need buy a module output. But I don't know the references! Can you help me? Thanks 👍
@@henriqueteixeira1236 Yes, you are right, I didn't catch the W in the 2080-LC50-48QWB. You need a B there. I don't think there is an option to get you there. Might check some of the 3rd party encompass partners.
The PWM instruction block doesn't exist in my Connected Components, and the instruction manual says to use MC_Power,MC_Move_Velocity, and MC_Write_Parameter. Is there something that I am missing here?
PWM function only works with Mirco820 controller. Other Mirco800 controller use a PTO channels to make same fuction as PWM. PTO output impules, as well. PTO works with MC instruction blocks. I am not sure, but I feel MC series functions give you more accurate control on stepper motor or servo motor when your motor is carrying a heavy load.
@@BuddyNoNo Yes, PTO with the MC Function blocks can be used for more accurate and flexible control in motion control applications. You can set Acceleration, Deceleration times, Axis busy status and etc with MC Function Blocks. PWM can be used for basic motion control applications, but I don't think its a better option for position control.
@@TimWilborne I should of used more words. I'm looking for a UDFB that would send a continuous pulse to a stepper drive. I'm using a pwm UDFB that I received from Rockwell but it seems to be a dirty signal and doesn't keep the motor at a constant speed. Your thoughts would be appreciated
The PWM is definitely in the deep end of the automation learning pool. Start with the basics first. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6e_2Tx6bmmM.html
