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Controlling stepper motor driver.

Created by: Leonardo Frontarolli at: 5/10/2014 4:56 AM (13 Replies)

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5/10/2014 4:56 AM	Rate (0)
Leonardo Frontarolli Posts: 1 Rating: (0)	Help me Please!!!! How to control stepper motor by LOGO, would like to know how to use PWM or pulse generator to trigger the driver and thus control the stepper motor.
Leonardo Frontarolli Posts: 1 Rating: (0)
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5/10/2014 10:45 PM	Rate (0)
William_B Posts: 5225 Rating: (1196)	Leonardo Frontarolli Help me Please!!!! How to control stepper motor by LOGO, would like to know how to use PWM or pulse generator to trigger the driver and thus control the stepper motor. Leonardo, the Siemens LOGO is not suited to drive a stepper motor with a PTO (pulse train output). Other manufacturers with almost the same footprint sized PLC does give this ability. To drive a stepper motor, you need an amplifier (power portion) and an indexer (provide pulse reference). An indexer can be a PLC / microcontroller (PIC; Arduino; ++) / PC (parrallel port). I sometimes even use a stepper driver that is a all in one (indexer+amplifier+motion controller). It all depends if you need it for studies / hobby / industrial application. For Siemens PLC range you can try S7-200 (discontinued in non-Chinese countries). Better yet you can get your hand on an S7-1200. The S7-1200 has advanced motion control capabilities. I have used both of these PLCs for industrial applications (stepper / servo / VSD). The LOGO can be used if you have a self contained indexer-amplifier device for your stepper motor. The LOGO is able to read sensor pulses at 5kHz to make positioning possible. I have used a LOGO for VSD driven positioning before. There are many options. We can be of more help if you give us an idea what you need it for and what you hardware you already have. Come back to us and we'll try to be more helpful. Good luck. w
William_B Posts: 5225 Rating: (1196)
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5/11/2014 12:13 AM	Rate (0)
William_B Posts: 5225 Rating: (1196)	Hi, I gave this issue a bit more thought.. wondering if there is not a way to get the LOGO to drive a stepper - even if it is not suited well. For it to work it must be the transistor output kind.. not relay. Theoretically you will have to look into 2 possibilities.. But first some background: The indexers I have worked with needs a frequency pulse. The frequency is varied to achieve ramp up, running and ramp down. Ramp up has the frequency adjusted dinamically from a low frequency to high frequency. Ramp down varies from high to low frequency. 1. The LOGO has a PWM instruction. This function is there to modify the ON time vs OFF time of a pulse according to an analog value (internal calculation or external input). The "periodic time" needs to be varied dinamically. A link can be established to an Analog Ramp function, for example. 2. The Asynchronous pulse generatorfunction is an alternative. Again the pulse rate will need to be varied dinamically using the Analog ramp function. ..so maybe the LOGO can drive a stepper motor's amplier. I have not thought through all the detail - maybe someone else will be willing to fill in the blanks. I would still suggest the use of the S7-1200 instead. Helpful? w
William_B Posts: 5225 Rating: (1196)	Last edited by: William B. at: 5/11/2014 12:38 AM NOTE: This post has got nothing to do with the fact that hunting season has opened. Whomever follow up on this post.. please be civil.
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5/12/2014 6:17 PM	Rate (0)
metwally mustafa Silver Member Joined: 10/10/2010 Last visit: 10/25/2024 Posts: 307 Rating: (15)	i think you can control the stepper motor with astandard stepper motor drive and you can used LOGO for forword and revese selection or for set point control

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5/13/2014 8:02 AM	Rate (0)
William_B Posts: 5225 Rating: (1196)	metwally mustafa i think you can control the stepper motor with astandard stepper motor drive and you can used LOGO for forword and revese selection or for set point control Please can you give us a reference to which stepper drive you are speaking of? I assume it is Siemens' s drive which I confess to not know. Thank you. w
William_B Posts: 5225 Rating: (1196)
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5/13/2014 10:48 PM	Rate (0)
Betel Platinum Expert Joined: 1/5/2007 Last visit: 4/7/2023 Posts: 1690 Rating: (580)	Hi, perhaps look here: /tf/WW/de/Posts/17293 Best regards Betel
	==> Meine TAG-Listen: "deut." ==> "Sammlung von Hinweisen und Schaltungen" ==> "PD-3-Punkt-Schritt-Regelung (z.B. für Mischer)" ==> "Zeiterfassung, ASTRO-Uhr,..." ==> "Meine EXCEL-Tools" + "Tool zur Linearisierung" ==> "Komplexes Rechnen mit der LOGO"
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5/14/2014 12:52 AM	Rate (0)
William_B Posts: 5225 Rating: (1196)	My concept proposal is attached. Please see if it is worth anything (at least in theory). w Attachment CONCEPT_Stepper motor pulse generator_V01.zip (1634 Downloads)
William_B Posts: 5225 Rating: (1196)
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This contribution was helpful to 2 thankful Users Betel Lucky123

5/14/2014 8:11 AM	Rate (0)
William_B Posts: 5225 Rating: (1196)	Sorry Guys and Girls.. I forgot to add a few notes for the above program segment. NOTES: * The provided program executes ramp up / run / ramp down * An up/down counter can be use instead of the Analog Ramp.. this should give a smoother action. * Note that frequency change linear not pulse period. Alternatives are welcomed. w
William_B Posts: 5225 Rating: (1196)
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5/15/2014 2:21 PM	Rate (0)
metwally mustafa Silver Member Joined: 10/10/2010 Last visit: 10/25/2024 Posts: 307 Rating: (15)	what about position control for the stepper motor ? , is there a function to generate a pulse train signal to drive the motor and is directly proportional to the position of an axis?

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5/15/2014 10:20 PM	Rate (1)
William_B Posts: 5225 Rating: (1196)	metwally mustafa what about position control for the stepper motor ? , is there a function to generate a pulse train signal to drive the motor and is directly proportional to the position of an axis? Wow.. you don't ask for much do you? Seriously though.. "Leonardo Frontarolli" did not ask for positioning. As I said before, the LOGO is not suited for such control. Crude positioning is possible. Doing accurate position control will be more difficult. The difficulty lies in it that you need to know how many pulses are generated to ramp up and ramp down the motion at a set speed. If the speed is fixed and tuning can be done, then it is possible. If it is calculations on-the-fly.. no sorrry. What I will tell you is that I have done VSD positioning with a LOGO. A pulsing signal from the LOGO gave the VSD a speed reference. (VSD did own ramping, LOGO did not control ramping.. much easier than stepper) An low rate single pulse encoder and home stop sensor gave feedback. Positioning was done using a rule based logic. Accuracy was measure in [mm] and not [um], but it was good enough. If you are serious about wanting to know more.. (there is a catch or two) I suggest you start a new thread and ask the question. Greetings. w
William_B Posts: 5225 Rating: (1196)
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This contribution was helpful to 1 thankful Users metwally mustafa

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