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Speed and acceleration with a inductive sensor

Created by: ArcticM at: 5/12/2011 12:45 AM (7 Replies)

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5/12/2011 12:45 AM	Rate (0)
ArcticM Posts: 24 Rating: (0)	Hello, I have a Logo! PLC and I would like with the high speed input mesure a speed of a flywheel with the teeth. I found this sensor: http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=7018231 In fact it is not the speed which interrest me but the acceleration of this flywheel. Does anyone already done something like that? And I have an other question. Which input on my PLC should I have to plug this inductive sensor? Thanks
ArcticM Posts: 24 Rating: (0)	Last edited by: ArcticM at: 5/12/2011 12:46 AM
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5/13/2011 9:49 AM	Rate (0)
ArcticM Posts: 24 Rating: (0)	Nobody can help me? Or if it's not possible to have the acceleration, with the logo software, is it possible that I obtain the speed with this kind of sensor? I know that the input 3 is an high speed 5KHz input. Thanks
ArcticM Posts: 24 Rating: (0)
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5/16/2011 10:13 AM	Rate (0)
ArcticM Posts: 24 Rating: (0)	Hello, I think about something for my problem and I would like to know if it could works. I have a continuous electric motor. The speed of a continuous electric motor is proportional with his voltage. So if I put this electric motor on my flywheel and if I put this electric motor voltage on an analogue input of my PLC I will be able to have the speed of the flywheel isn't it? I have the logo Monitor software so I will be able to obtain these datas on excel to obtain the speed. ArcticM
ArcticM Posts: 24 Rating: (0)
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5/18/2011 1:14 PM	Rate (0)
ArcticM Posts: 24 Rating: (0)	Hello, I continu to provide my topic. I maybe found a solution to have the speed of the flywheel. I will put a inductive sensor for the teeth. http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=7018229 On the output of this sensor I will set a converter frequency/voltage http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=0460944 Like that I will have the voltage which will change with the speed of the flywheel. So questions are: Is it relevant? On which input have I to put the output of my converter? Thanks
ArcticM Posts: 24 Rating: (0)
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5/18/2011 5:33 PM	Rate (0)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 11/18/2024 Posts: 5697 Rating: (715)	How many pulses you get /min? Is your sensor fast enough? (switching frequency) Some Logo's have highspeed inputs, please check the manual for that. You can measure frequency with a logo /tf/WW/de/Posts/13648 Only in German, sorry. Second idea with a Motor, not my favorit. 3th idea, your sensor has to be fast enough. Best regards, Marcjan
	Last edited by: Marcjan at: 5/18/2011 5:35 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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5/18/2011 9:05 PM	Rate (0)
ArcticM Posts: 24 Rating: (0)	Yes this program seems really good but I would like to obtain a curve with Logo!Monitor software. I saw that there is I3 which is a high speed input. Do I have to configure that on the logo soft? The sensor that I found and the converter frequency current can work until 2000Hz so if I am all right for 2000teeth detected/sec so 2teeth/ms. Am I all right? Edit: I made a mistake, if I make what I want, I need to use a analogue input.
ArcticM Posts: 24 Rating: (0)	Last edited by: ArcticM at: 5/18/2011 9:13 PM
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12/10/2011 12:28 PM	Rate (0)
Oliver Gonzalez Posts: 27 Rating: (0)	I feel that you are trying to fry an egg in a freezer. If what you need is to read the speed of a motor and see graphics of the speed and acceleration, then the LOGO! might not be your device. It´s like trying to measure the diameter of an axis with 0,01 mm precission using a construction flexometer. Instead, I would look for any freeware DAQ software with a high frecuency I/O card with USB or parallel port and a encoder for the motor, with this you will me able to do everything much cheaper and reliable.
Oliver Gonzalez Posts: 27 Rating: (0)
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9/2/2018 1:43 PM	Rate (0)
malekae Member Joined: 4/15/2018 Last visit: 5/12/2022 Posts: 5 Rating: (0)	ArcticM Hello, I have a Logo! PLC and I would like with the high speed input mesure a speed of a flywheel with the teeth. I found this sensor: http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=7018231 In fact it is not the speed which interrest me but the acceleration of this flywheel. Does anyone already done something like that? And I have an other question. Which input on my PLC should I have to plug this inductive sensor? Thanks Maybe i am late, but i have faced the same issues few days ago , your sensor sensing range is 2mm ,so make sure that the distance between your sensor and the flywheel's teeth is 1.5mm and less. According to your sensor, the Max. switching frequency 2000 Hz (2KHz) i recommend if you have a high speed motor , then just put a scotch tape at the top side of each teeth and keep one of the tooth in normal situation thus , the sensor will detect this teeth as one revolution (It wont be very precised ) or you can have a higher switching frequency sensor to count .

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