2/22/2016 9:55 AM | |
Joined: 2/2/2016 Last visit: 2/8/2023 Posts: 221 Rating: (2) |
any help? |
2/22/2016 10:01 AM | |
Posts: 1529 Rating: (202) |
What controller are you using? The functionality is probably built in. |
2/22/2016 11:21 AM | |
Posts: 1529 Rating: (202) |
Set pulses on what? |
2/22/2016 11:52 AM | |
Posts: 1529 Rating: (202) |
WHAT PLC ARE YOU USING??????????????????????????????????????? Third time asking |
2/22/2016 11:59 AM | |
Posts: 1529 Rating: (202) |
Download the S71200 Motion Control manual and read it. What you want to do is very easy. |
2/22/2016 12:15 PM | |
Posts: 1529 Rating: (202) |
Let me guess, this is some sort of school project. |
2/24/2016 5:20 PM | |
Joined: 2/2/2016 Last visit: 2/8/2023 Posts: 221 Rating: (2) |
it is dc geared motor from Nidec 404.961 it has hall effect sensor which gives pulses.in my configuration i haven't used the feedback yet. I configured the axis technology and I used its commands, I downloaded the program to the PLC and I push start but i didn't get output from PTO. However when I configure it to PWM it gives output. the whole program is activated except the CTr_PWM and Move absolute. I neither used any limit switches in hardware nor software the attached file shows the program and axis configuration.
AttachmentDoc1.pdf (363 Downloads) |
Last edited by: engma at: 2/24/2016 5:22:56 PMLast edited by: engma at: 2/24/2016 7:08:35 PM |
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2/24/2016 9:42 PM | |
Joined: 3/16/2015 Last visit: 10/10/2021 Posts: 1250 Rating: (173) |
Did you try moving it manually trough the "commissioning" control? |
2/25/2016 6:45 PM | |
Joined: 2/2/2016 Last visit: 2/8/2023 Posts: 221 Rating: (2) |
I didn't connect any drive, I will use simple H-bridge to drive the dc motor. Is it obligatory to connect the drive ? it gives light with PWM without connecting any output or drive. I activated manual control but the commands weren't activated as shown in pic.
AttachmentDoc1.pdf (384 Downloads) |
Last edited by: engma at: 2/25/2016 6:48:24 PMLast edited by: engma at: 2/25/2016 6:51:15 PMLast edited by: engma at: 2/25/2016 6:57:40 PMLast edited by: engma at: 2/25/2016 7:20:22 PM |
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2/25/2016 8:39 PM | |
Joined: 3/16/2015 Last visit: 10/10/2021 Posts: 1250 Rating: (173) |
Take the device offline |
2/25/2016 9:30 PM | |
Joined: 2/2/2016 Last visit: 2/8/2023 Posts: 221 Rating: (2) |
ok, I will my version is v13 sp1 |
2/25/2016 10:24 PM | |
Posts: 5225 Rating: (1192)
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(1) (2) The MC_POWER should not be activated if you try to use the commissioning tool. I recommend strongly to use this tool to experiment with the JOG function to see the results. (3) (4) (5) A PWM can be used to vary the power / speed via the H-bridge. That means that a ramp up - run - ramp down profile can be generated with the aim to do positioning. Speed is the tool used to do positioning. When using a PWM, a mathematical formula and some rule based control is needed to regulate the speed to achieve position according to a position setpoint and position feedback. now.... you are in control of your own project and this thread - Kind regards. AttachmentDoc1 with commentary.pdf (340 Downloads) |
Last edited by: William_B at: 2/26/2016 7:20:29 AMAdd document with commentary for clarity. Original document posted {2/24/2016 5:20 PM}. |
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2/25/2016 10:46 PM | |
Joined: 2/2/2016 Last visit: 2/8/2023 Posts: 221 Rating: (2) |
Dear William I am sorry, after your great post it is still not clear for me what is the problem with my program. Is it enable or move absolute ...? I will apply the pulses to the gate of transistor drive the motor .the driver is some thing like that http://store.fut-electronics.com/collections/dc-motor-driver/products/dc-motor-driver-30a
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Last edited by: engma at: 2/25/2016 10:47:10 PMLast edited by: engma at: 2/25/2016 10:48:13 PMLast edited by: engma at: 2/25/2016 10:50:41 PMLast edited by: engma at: 2/25/2016 10:55:42 PM |
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2/26/2016 7:32 AM | |
Posts: 5225 Rating: (1192)
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The above note is the best place to start from
I have taken the document from post 2/24/2016 5:20 PM and used a mark-up tool to add commentary and placed in into my old post of 2/25/2016 10:24 PM. I do this reluctantly as I know we (you) are moving in the wrong path. ... I agreed with From your supplied link.. (also works up to 27Vdc?) ...this requires for each direction of movement
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Last edited by: William_B at: 2/26/2016 7:34:18 AMfill up some blanks |
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2/26/2016 1:41 PM | |
Posts: 5225 Rating: (1192)
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Article to read.. (academical: speed curves) http://www.precisionmicrodrives.com/application-notes-technical-guides/application-bulletins/ab-022-pwm-frequency-for-linear-motion-control |
This contribution was helpful to1 thankful Users |
2/26/2016 2:35 PM | |
Posts: 5225 Rating: (1192)
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{Set :: Mentor tone} We program because of the hardware and to compliment it. Case in point... PWM vs PTO when using the H-bridge. Step0 - understand what is asked by the project and what the aims are. Step1 - get to know the hardware and what is required. It does not need to be experimentally proven but it must be 99.5% sure from research at least. - - - in the actual hardware you are using. Step2 - configure the hardware on the PLC. Step3 - create a model (design) of rule based or mathematical formula to give control. Step4 - coding Step5 - test, evaluate, adapt. w PWM links to look at.. |
Last edited by: William_B at: 2/26/2016 8:23:51 PMadd coding related links |
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2/28/2016 7:40 PM | |
Joined: 3/16/2015 Last visit: 10/10/2021 Posts: 1250 Rating: (173) |
Hi engma, With all due respect, I just had to lough. Did you read any of the replies? |
2/28/2016 11:54 PM | |
Joined: 3/16/2015 Last visit: 10/10/2021 Posts: 1250 Rating: (173) |
Hi engma, Here's a summary of the 7 page thread so far: 1- Your motor is not a stepper motor which means you will not be able to "step" the motor. You can "pulse" it as you stated and have some degree of control over the effective voltage applied to the motor and thereby the speed (RPM). You have to decide if that level of control is sufficient for you application. 2-"PTO" technology object provides two outputs, one pulse and one direction. Your interface/driver will need to accommodate that and if it doesn't then you can either modify/ change the interface, or read a couple of posts up, on this very same page, William_B's detailed write-up of how you can use PWM and multiple outputs to control motor direction using your arduino. In this case you will be using a PWM not PTO and you will use duty cycle to control RPM and write code for hardware limits.
Cheers Kal Edit: have a look at this |
Last edited by: Kal.A at: 2/28/2016 11:57:39 PMLast edited by: Kal.A at: 2/29/2016 3:12:28 AM |
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