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Hello everyone, welcome to K2Tools for beginners and in this tutorial we will discuss about
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the constraint toolbars.
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So let us see which are the, so we will just drag this out and hold on a shift and you
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can see here the constraint toolbars and the first one it is blurred and that is constraints
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defined in the dialog box we will see in this tutorial. Similarly there is constraint
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and in the drop down menu it is a contact constraint. So these are the three toolbars we will
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see in this lecture and in next tutorial we will see the fix together option the auto
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constraint, the animate constraint and the edit multi constraint.
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So let us see the constraint toolbar first. So basically we use the constraint toolbar
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to log the degree of freedom for the sketches. So let us say for example the rectangle is
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there. So to log the degree of freedom for this rectangle we must provide the dimension
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like the horizontal length, the vertical length that is width and the height we must provide
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and we must log at least one point with reference to the absolute axis then only it will not
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move.
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Let us see we will just click on the constraint option and select the line and once you click
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on the line it will just provide the dimension. Similarly for the height you just click on
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the line and place where you want. So now you can see the hundred is the length and 1880
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is the width of the rectangle but still if you try to move this rectangle it is getting
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moved. So now we must provide the dimension from this absolute reference this is the vertical
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and the horizontal reference. So let us say if we just delete this hundred so now if you
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try to drag this it is getting moved but we have provided the dimension 80 so now it will
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not move. So I will just again provide the dimension here and now it is hundred point
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358 so let us do it 200 and now we will provide the dimension you can provide the dimension
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to the point to the line as well. Just I will provide us to the line and from the horizontal
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axis it is 230 and from this vertical axis it is 44. Now you can change this as well let
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us say 45. So now it is turned into the green rectangle. So now it is called as the ISO
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constraint. We will discuss in the upcoming part.
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So again if you want to constraint the line then again you have to provide the length of
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the line and you have to provide these two points locations. Similarly if you want to
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provide the dimension to the circle and if you want to constraint it you have to provide
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the center location and then you have to provide the dimension. So again let us say if you
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want to provide the dimension to this circle just click on this periphery of the circle
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and you will provide the diameter. So let us add 120. So if you want to provide the radius
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then you can just change this to the radius. So radius is 60 mm so now it is showing the
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radius option but now again if you try to move it it will again move. So you have to provide
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the dimension to this point from the horizontal axis and the vertical axis then it then
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only it will not move. Similarly if you have the point let us select the point and you
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just add the point. So again you can provide the dimension to the point as well just select
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the constraint option, select the point and just provide the dimension. Just provide the
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vertical. So now if you try to move it it will not move. So in this way we provide the
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dimensions to constraint any sketches. Also we can use the same option for providing the
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geometric constraints like tangency, concentricity then the coincidence we can provide. So just
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select the option over here and let us say if you want to make this line tangent to the
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circle. So first we will just log this. We will provide the dimension to this one. Just
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provide the horizontal dimension and provide the vertical dimension over here. So now we
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have provided the dimension and now it is turned into green. So now it is fully constrained.
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So now let us try to create a constraint between this line and this circle. So now we want
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to make this line tangent to this circle. So again select the constraint option, select
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the circle and select this line and if you rightly on it then it will provide the possible
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constraints over there. So now it is only possible to constraint it as a tangent. So make
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it tangent. So if you click it the line will get tangent to that circle. So I will just
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control, control set. Okay. So now again now I want to I want to just make this point and
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this point coincide incidents. So just select the first point, select the second point
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and then rightly on it and now you can see here there are possible constraints over here
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available here like horizontal, major direction, vertical, major direction, then the coincidence
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allow the symmetry line. So in this way the whatever the possible constraints are there,
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it will be getting available. I will just make it coincidence. So now you can see this
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point is coincidence with this and this constraint is gets added. So I will again just control
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set this one and now again select this constraint option, select the line, select the line and
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here you can select the perpendicular or parallelism. So just if I if we want to make these two
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lines perpendicular, just select the perpendicular option. So now these two lines we want to make
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a parallel. So just select the line, select the one line, select the second line and just
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rightly on it and make it parallel. So now these lines are parallel. So you can see here
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it's are these are parallel now. So again I will just make this control set. So now one
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more option is available there and that is a constraint defined in a dialog box. So for
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this option your objects must be pre selected. So just select the two lines and now if you
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click on it, you have all the possible constraints there. So let's say if you want to make it
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parallel, if you want to make it perpendicular, just click on the perpendicular option and
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you can see these are getting perpendicular at this location. Similarly, if you want to
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just remove this, if you want to make it parallel, then you can just create a parallel option.
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So only condition is to use these option is your objects must be pre selected. I'll just
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again control Z this one and now let's say if you want to make a constant circle from
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this two. So just select the first circle, select the second circle and just click on this
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option and you will find the constant DC options. Just make it constant, so it will become
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a constant trick option only. So if you want to make a tangent, so the constraint tangent
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will get added there. If you want to add a distance, so now you can add a distance over
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there. So just double click and you can add a distance over there. So in this way the
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distance is getting added. So again, just make a control side of it. So in this way, these
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two options can be used. The first one is the constraint and this one is constant defining
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the dialog box. This will be very much useful for designing any CAD model because for any
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CAD model, there is a base must be a sketch. So now we'll see, not this one, we'll see
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this option over here, the contact constraint. So again, this will be same like the constraint
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option, but you have direct options available here. So let's say if you want to make a
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concentric circles, make these two circles are concentric, just select the one, select
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the two, so it will become a concentric. Similarly, if you want to make the two points coincidences,
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just select the two points, it will become a coincidence. Similarly, just let's say if
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you want to make a tangent, so select this point, select this circle and select this line
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over here, so it will become a tangent. So in this way, this option is also useful, the
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contact constraints. So now we will see what are the different types of constraints over
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here and what are the different types of constraints, sketches, we will be working with in this
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Catea V5. So just I will delete this one and we'll create a face sketch here, just select
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the rectangle, just create one circle over here. Similarly, let's say we'll create one line,
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we'll create one point over here. So now we'll see the three types, that is the under
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constraint, ISO constraint and third one is the over constraint. So again, let's provide
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the dimensions. So now we have seen that to constrain any rectangle, there must be a four
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dimension must be there, like the width, the height, width and height of the rectangle and
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the absolute reference, that is vertical distance and the horizontal distance. So just provide
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the width first, then provide the height 130 by 80 and now I will provide, let's say this
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dimension is 320 and similarly we'll provide this dimension as 80. So now it is turned into
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green. So again for the circle we'll provide the radius only and for this one we'll provide
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this dimension and now we have to provide the two points dimension over here. So just
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provide that one two. So now you can see here, so this is actually coincidence, so that's
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why this is not required to provide a dimension but we'll just provide a dimension to have
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a better clarity. So now you can see here the rectangle is fully constrained now because
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if you try to move it on, it will not move. So this is called as the ISO constraint, that
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is a fully constrained and in Cartier it is turned in green color for the sketches which
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are fully constrained, that is the ISO constraint. So here in the middle the circle you are seeing
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is in the white color, so it means that it is under constrained. So again in Cartier V5
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the color is white for the under constrained sketches. So you can change this color though
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but yeah, we'll just keep it as it is and if you try to move it on it will get moved.
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So again to make it constrained we have to provide the dimension to this center row.
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Or you can just provide the dimension from the sketches as well which are already fully
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constrained. So you can provide the dimension like that as well. Okay, so now this is fully
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constrained. So now if we want to let's say if I provide one more dimension over here
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then it will turn into the over constrained option. So now you can see here because of
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this circle this line is getting over constrained because it has the two dimensions now. And also
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this point has a two dimensions. So this line and this point is become pink. So for over
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constrained sketches, so this is now over constrained. So for over constrained sketches, Cartier
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is showing with the pink color. So you can change this color for the displays as per your
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requirement but better to keep as as per the Cartier default only.
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So similarly now this point is under constrained because it is white. Again you have to provide
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the dimension to this one from vertical dimension and this horizontal dimension. So now it is
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again the fully constrained. So three types. First one is the ISO constraint. So fully constrained.
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Second is the under constrained and third one is the over constrained. So over constrained means
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more constraints which are not required and for the under constrained there are a short of constraints.
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So now we will discuss already these three options constraint defined dialogue box
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constraint and the on the under constrained. So in next upcoming lectures we will see the remaining
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constraint part. Till the time if you have any questions you can just add into the comment box
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below. So thank you very much for watching. Thank you.
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