Recent content by Zalajbeg

Thanks for the link. I agree that full level of yellow and a partial level of magenta creates orange. However my problem is rather on the mechanisms of the paint mixing. My questions are basically: * How do I get orange by mixing yellow and magenta, in other words if magenta absorbs the green...

I am curious about how mixing paints works. If I mix an ideal paint A and an ideal paint B what is the product mixture C? Is it (Option 1) a mixture absorbs all the range A absorbs and absorbs all the range B absorbs OR is it (Option 2) a mixture with original A and B pigments therefore some...

Thanks for your answer. Then I understand that a stepper motor will not be pushed ahead and will be able to maintain its step rate even though there is an external torque in the same direction of the rotation if a sufficient torque is available. For x, my cases will fall between 0 to 90 degrees...

Thanks all for your replies. My first question was only about the stepper motors, therefore I simplified the problem. But now thanks to your guidance I see the topic in a broader angle. Let me fully explain what I need. * I want to rotate plate/plates in a air flow and want to measure the...

Thanks a lot for your reply. I have been moving to another apartment therefore I did not have proper internet connection. Sorry for my late response. According to what I read I think I will be OK to go with stepper motor rather than micro stepper one. To be honest I did not think about the...

I want the rotation to be smooth. I may need the steps with some scenarios like "Rotate between angle -x and +x, one step from -x to +x in t seconds and one step from +x to -x again in t seconds, repeat it again and again (for few minutes)". As I don't know much about the stepper motors I just...

Hello everybody, I have a project in which I need to continuously rotate some plates attached to rods across a flow and measure the effect of these plates on the flow in downstream. The rotation must be in specific angular velocities. Let's assume I expect the maximum moment applied on the...

Thanks all for your contribution. I know how the torque and speed are transmitted from a gear to another gear. My question was mainly on why the DC motors/engines cannot generate enough torque by rotating slower and I have the answer now. The ideal motor/engine with the meaning of constant...

Then maybe my question must have been why I needed more than one gear to pull a heavy object. Again my logic is the same, if the DC motor was an ideal motor which could have the same power output at all the RPMs only one gear must have been enough to create the required torque output. I think...

Thanks a lot for your replies. Could you please also explain me why I need gears to pull heavy objects with a simple DC motor, the ones can be found in very simple toys? The below part of my question; How do these motors work? Do they also have a curve? I read the article in the link posted by...

Hello everyone, I see videos showing the output torque can be increased by using gears and this is usually demonstrated with DC motors (simple DC motors can be removed from toys). I understand the general logic: * The DC rotates in a high speed. * The gear system reduces the output speed. * If...

What I meant with valid was that: The only point which has zero angular momentum for a body which has only translational motion is the center of mass, this equation is not valid for any other point. I agree with your statement there is no more valid point, the validity I mentioned was the...

I think this clarifies my thoughts. Just one more question: If I know a body does only linear motion (let us say the rod I mentioned) but I don't know the magnitude of one of the forces. Then should I use the center of mass as the reference point for the torque balance? As I understand from...

I think I am not missing the first thing. As I say the torque around the point A is FL/2 I take the torque effect of the weight into consideration (FL-FL/2=FL/2). However your second sentence leads to new questions: 1) A body moving in a straight line.. What is this line? Is it the line which...

Hello Everyone, Let us think about a rod whose length is L and end points are A and B. The road is parallel to the ground therefore the weight of the rod is perpendicular to the line between A and B. The weight of the rod is F and two forces with the magnitude of F are exerted on both ends and...