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Showing results for tags 'encoder'.
Found 7 results
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Hello to all, I would ask for an advice about setup for stone cutting machine project. Machine cutts big stone boulders to 2-10 cm thick plates with required precision of 0 to +1-3 mm depending of thickness. Costumer has a problem with x -axis movement (this movement defines the thickness of plates), because it is not precise enough. The setup i have conatins: -Induction motor for x-axis movement, -VFD for induction motor, -Incremental encoder for traveled distance feedback hooked to PLC. -Vision PLC . I have a few projects with only PLC or VFD setup, but first of this kind, so i would ask someone with more experience for advice how to achive precise positioning depending the given target value by operator and best setup for this project . The possible problems are inertia (the X -axis holds big hydraulic cutting motor) and also the lowest acceleration and deceleration value that i can set at VFD is 0.1sec. Supouse that I have to lower the speed of motor movement depending how close to target value it gets to achieve precise stop. What is the best possible way to do it through ladder ( PTO or simple math functions)? Any kind of help will be appreciated, Best regards, -
Hello Everyone, I have just started working with Unitronics equipment and now I have to put a DSF60B to operate with a V570, the problem I am having is while the signal form the encoder is high the plc keep on inrementing value instead of treating it as a single pulse signal. To solve that i am using a Positive Transition Rise as my inputs and Incremental Block to read the signal from the Enconder. I have been told, and also imagined, that might be a better solution, just couldnt find it. I would appreciate if somebody could help me out with it. Thank you in advance. -
I wrote a program using a shaft encoder (x2) high speed input. I have logic in my programming converting input pulses from the encoder to display length of material. On the display the length will only go up to 94", when it reach 94" it starts counting down to 0. Why won't it go past 94"? -
Hello all, I have an 11 bit absolute rotary encoder that outputs in gray code. Here is datasheet on it: https://cdn.automationdirect.com/static/specs/encodermda.pdf This is needed for determining the position of the shaft on an engine. I am fairly new to Unitronics and Visilogic. I have a V700 with the V200-18-E3XB snap on. I have looked at other answers on this topic and have created a ladder diagram based on this format: http://www.plcdev.com/using_ladder_logic_for_gray_code_conversion However, I am still stuck when it comes to getting the binary to decimal and then being able to read the position output from the encoder on the HMI. I am a college student working on my senior capstone. Any and all help is appreciated. Thanks, Robby -
Hi, I opened U90 help files by mistake instead of Vision help files , and found that for HSC it says "Counter value is an integer with a range of -32768 to +32767. After the counter reaches the maximum value of +32767 it will continue to count in the negative range. " I couldn't find similar statement in VisiLogic help files. Now, I plan to use Vision controler V430, and in Technical Specifications for V430-J-TR34 it says that hardware counter has resolution of 32-bit. Does that mean that I can link ML to high speed inputs and they will count to 2^31? I am using two shaft encoders if it's of any matter. I wasn't even thinking about this question, but since accidentally I looked at U90 help it's been bugging me.
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We have connected an encoder to M91 2 R1 and cannot get the reading in the Memory Interger Value. We are getting a value which keeps on incrementing as we rotate the Shaft of the Encoder. Can anyone send me a sample prog so that i can check if any mistakes have been made. The same programme is working with the same encoder programmed a few months back.
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Good Day Everybody Recently i acquired the plc-m91-2-T1 and i need it for an application where i use a shaft encoder with 2000 pulses per rev (PPR) At first i tried to add both of the channels (input 0 for channel 1 and input 2 for channel 2) as shown in my program (attached) and it almost made it well for one direction (it counted 1900 of 2000 pulses) so i thought it was the speed of the counter so i reduced the pulses to 250 with a FlipFlop JK Circuit. Any ideas or suggestions of how can i use the shaft encoder easier? Also i need it for both directions. Also i wanna know if there is any support in Spanish.
