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Recent content by Buqpa

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    Motor Control: Start and Stop at the same point

    Dear Karesz, thanks for all your ideas. I think I will take the optical indexing into account also. It is not very easy to do, but it lets me use DC motors, which are more powerful and cheaper! What do you think? Why AC better than DC motors? Kind regards, Diego
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    Motor Control: Start and Stop at the same point

    LoL! Ok, I will have a look asap! You all are being really helpful! Thanks a lot!
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    Motor Control: Start and Stop at the same point

    Thanks a lot Elmuhamady! I will have a look at your link (no I can not) Any idea about the model of the stepper motor? I need 6 motors and I have no six copier machine to break close to me :P Kind regards!
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    Motor Control: Start and Stop at the same point

    Dear ScOe, thanks a lot for your reply. And thanks to everybody, I din not expected so much atention! Let me explain you all the project. Instead of an arrow, there will be a capital letter attached to each motor. Letters must sping fast enough so they can not be distinguish. There will be...
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    Motor Control: Start and Stop at the same point

    Dear bosparra, Thanks a lot for your information! You all are being really helpful! Any recomendation on what a motor to buy or where to look for it? Kind regards, Dieg
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    Motor Control: Start and Stop at the same point

    Dear Elmuhamady, Thanks a lot for your reply. Yes, I think that will work properly. Now I have a doubt. I will be movin an "arrow" that will weight around 2kg, and I would like to reach sucha spin speed I could not distinguish the arrow. Do you know any powerful step motor not very expensive...
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    Motor Control: Start and Stop at the same point

    Dear Karesz, Kind regards for your reply. Let me explain you want I mean. Imagine there is an arrow attached to the motor of the fan. Before it starts spinning it points to a direction, for example, 12 o'clock. Then it starts spinning and spins for sometime. Then you stop it. The arrow will keep...
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    Motor Control: Start and Stop at the same point

    Hello and thanks in advance for your answers! Please, excuse my English as it is not my mother tongue and I may make some mistakes. Let me ask you for some help: I am looking for a system like a fan that starts and stops at the very same points. Image a stopped fan that starts spinning. When I...
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    Elecromagnetic metamaterial by caloz

    Re: what is metamaterial? Meta comes froom Geek, well said, but I dont like this definition you gave "not exactly a material" Meta means something about that something. For example, metalanguage means language about language, like html tags and so In this case, the best definition I can think...
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    Menader-line Polarizer Simmulation

    meaderline Hello everybody and thanks in advance for reading this. I am trying to simulate a Meader-line polarizer, but I'm facing several problems. Due to the nature of the structure (very thing lines in a meander-configuration) using CST means loads of cells for an accurate simulation. I'm...
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    What changes do the CST 5 Service Packs introduce?

    Hi everyone! My question is pretty short and easy, i think I have been searching on th einternet but I have not found and answer... Can somebody tellme what the difference (or ads/cons) do ServicePack1 and ServicePack2 make compared to the simple CST MWS 5.0.0? Thanks in advance!
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    Problems with simulating a Biconical antenna in CST

    Hello! I'm trying to simulate a Biconical antenna in CST, but I having problems. It should be feed usind a coaxial cable thrugh the cones. Does anyone have some kind of advice for this simulation or any model that have good agreement with measures? I have tried a subgrid-meshing to get enough...
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    Biconical Antenna Simulation

    Hello! I'm trying to simulate a Biconical antenna in CST, but I having problems. It should be feed usind a coaxial cable thrugh the cones. Does anyone have some kind of advice for this simulation or any model that have good agreement with measures? Here is the model I have done, if someone...
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    Alford Antenna Information

    Hello, I have to design an Alford Loop antenna and I can not find information about design. Even theoretical information is not very easy to get. Does anyone have some information that may share? Thanks a lot.
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    Looking for info about Alford loop

    Hello everyone, I'm trying to get information about Alford Loop. Does anyone have some? Thanks a lot!!!

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