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Found 4 results

  1. I had to upgrade the control system of the plastic extruder. V700 + V200-18-E46B used in application. The system has been operating successfully for over 2 years. However, a separate installed dosing system that determines the color of the plastic has failed. It has a stepper motor, a driver and a failed control board. I quickly connected the input of the motor driver to the output of the O0 npn PWM and programmed the change of the PWM frequency depending on the speed of the screw of the extruder. Everything worked, but there was one problem. Sometimes the stepper motor must be stopped for a few seconds without stopping the extruder (for cleaning). Accordingly, the stepper motor that started smoothly with the extruder to a certain speed must stop and then accelerate again. And here I find a problem - the output of the PWM which perfectly controls the stepper motor when starting from 0 speed does not want to start smoothly from another source. That is, the variable recorded as the PWM frequency changes smoothly to the setpoint - but the PWM output signal to the stepper motor occurs only after 2-3 seconds and with a frequency that has already reached the required value - respectively, the motor does not start because the frequency is too high. This part of net is controlled by START STOP STEPPER MOTOR BIT. I try to use it for accelerate stepper motor after stop and if it is slower then calculated frequency setpoint ML6. ML11 - PWM frequency, MI61 - frequency change step. I do not know why PWM signal output is paused for a few seconds (i try to disable all other net for test). If MI61=1 - pause is approx 5sec after ML11 reached setpoint, if MI61 = 50 - pause is shorter 1-2sec. If i use MI=200 - pause is short but stepper motor do not start sometimes. I try to see PWM frequency in Info Mode - it is changed correctly but PWM output do not start after PWM frequency variable start to increment. Any ideas for stepper motor start stop controlled via V200-18-E46B PWM output frequency?
  2. I am running a V570, v200-18-E5B, and IO-D16A3-TO16. the high speed outputs on the snap in and the expansion are both running identical stepper motor drives and motors. the motor that is controlled by the snap in has a long lag between button push and when it starts moving. It will not run at a constant speed and some times even stops and restarts with the button still pressed. the motor that is controlled by the expansion runs at a constant speed, stops and starts immediately with button commands, and runs must faster than the snap in controlled motor. stepper motor drives are set up the same (smooth 400, ect). the only difference between the 2 motors is the length of wire between the out puts and the motor drives. the snap in wire is 14' long and the expansion wire is about 2' long. Any ideas on how to smooth out the operation of the motor that is controlled by the snap in? CB v14 EOB 5-29.vlp
  3. Hello, I'm an automation student and part of my final year project is designing and building an automated storage and retrieval system. I'm using Unitronics V570 which is totally new to me so I've to get familiar with Unitronics firstly. I was going to use a 24v DC motor with position encoder and I was thinking of using a stepper motor aswell but I'm not sure if this is relatively easy to implement with the PLC. My question is, if it is possible to use both these methods is there videos on setting up and configuring and maybe a sample code for both that would get me started. Thanks in advance Donal.
  4. Hi Everybody I'm working on a project where i need a pulse sequence with a frequency of 1 kHz to 10 kHz to control a stepper motor with a drive which only needs 1 input I'm using a M91-T1-2 and i configured hardware the next way: And then i use the next ladder program to enable the output and to put the frequency's value: My question is: with this configuration i' should get 1 kHz in the output 0? or i need to do something else because i don't get any
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