Hi guys, it's time for our 3th part of the bicycle 3d modeling tutorial. In this tutorial i will show you to process of 3d modeling of the crankset. The finished model will be high poly. Fell free to comment if you get stuck anywhere along this 3d modeling tutorial.
Part 2 - Bicycle Frame - 3ds Max Modeling Tutorial
Part 3 - Bicycle Crankset - 3ds Max Modeling Tutorial
Part 4 - Bicycle Pedals - 3ds Max Modeling Tutorial
Part 5 - Bicycle Handlebar - 3ds Max Modeling Tutorial
Part 6 - Bicycle Seat - 3ds Max Modeling Tutorial
Part 7 - Bicycle Wheels - 3ds Max Modeling Tutorial
Part 8 - Assembling the Bicycle - 3ds Max Modeling Tutorial
Step 2: So you don't get confused with the units setup change it so that we all work with the same type. From Customize, click on Units Setup, select Generic Units and International, click OK. I've use to work with the metric system, but I've found out the with generic it's easier for everyone.
Step 3: Select the Front viewport, and from Create, Geometry select Tube, Change the Height Segments to 1, the Cap Segments to 3 and the Sides to 180. Expand Keyboard Entry and leave the X,Y,Z axis to 0, but change the Inter Radius to 50, the Outer Radius to 35 and the Height to 2.5, click on Create.
Step 4: Right click on the Tube and select Convert to -> Convert to Editable Poly. We will make a high poly object.
Step 5: Expand the Front view by pressing ALT+W. Go to Modify, expand Editable Poly and select Polygon, holding down CTRL select 52 polygons starting from top middle. Select a total of 52, witch means 26 on each side(front and back). Delete them by pressing Delete on your keyboard.
Step 6: Change the viewport to Perspective by pressing "P" or by pressing "V" and selecting it from the list. Zoom in next to the Borders, and in Border selection mode select both borders resulted from the deleting of polygons in the previous step. Now click on Bridge.
Step 7: Change the selection mode to Edge, i will still have the edges from previous step selected. Click on the square next to Chamfer, change the amount to 0.1 and click the check mark for OK.
Step 8: Now you need to zoom in in every corner of the hole. Change the selection to Vertex, and select the 2 vertices highlighted from every corner, 16 in total. Click on the square next to Weld and if you change the amount to 1.2 or higher you will see the difference of 8 vertices between Before and After. Click OK.
Step 9: In Edge selection mode, select one Edge from the middle and click on Ring, you will now have selected all the middle edges like you see on the left of the image. Now click on the square next to select, change or leave the Segments to 1 and click OK.
Step 10: In Vertex selection mode, using the Select and Move tool, position the vertices like you see bellow to form a round end. Don't forget to select also the back ones.
Step 11: Now using the Select Object tool, select the 16 polygons you see selected. 8 from each side, back and front. Delete them, Bridge the borders, Chamfer the Edges and Weld the vertices exactly like we did before.
Step 12: Now we need to make this holes round. To do this we need a reference, so, from Create Shapes make a NGon with 8 edges. Press F3 to switch between Shaded and Wireframe so we can see what are we doing. Click and drag to Create the NGon with a radius of about 2.6.
Step 13: Now using the Select and Rotate and Select and Move tools position the NGon to fit the sides of the hole. Select the first object and in vertex selection mode, position the vertices on top of the NGon intersection points. You should have something like bellow. Repeat this step for the hole from the other side.
Step 14: I have the felling that I've made the tube a little to big, so let's fix it, it will be a good opportunity to work with the Select and Scale tool. Select the inner edges, select on from each side and click on Loop, select the Select and Scale tool and scale the edges up in the X and Z axis to 110.
Step 15: Now for the outer edges Scale them down to 95 in the X and X axis.
Step 16: Change the selection mode to Polygon and using the Select Object tool select the polygons I've selected, to the middle of the circle on each side and Delete them.
Step 17: Now select the polygons from the side. Leave one, and select two, leave two and select two and so on until the end. Click on the square next to Bevel, leave the Bevel type to Group, change the Height to 1.8 and the Outline to -0.2. Click on the "+" sign to Bevel again but this time use a Height of 1.5 and an Outline of -0.75. Click OK.
Step 18: In Edge selection mode, select the bellow selected edges(198 total)holding down CTRL and using the Select Object tool.
Step 19: Chamfer them with an amount of 0.1 and click OK. The smaller the Chamfer amount the sharper the edge.
Step 20: Now we need to Weld the corner vertices. Select two vertices from each corner on both sides, 72 in total, and Weld them together with an amount of at least 2 so after the weld you will lose half of them.
Step 22: Select the Select and Rotate tool, activate Angle Snap Toggle and holding down SHIFT rotate the object in the Z axis to -72. In Clone Options change the number of copies to 4 and click OK.
Step 23: With one out of 5 object selected activate the Attach tool and click on the other 4 to attach them together.
Step 24:Go in Vertex selection mode and press CTRL+A to select all vertices. Click on the square next to Weld, change the amount to 0,11(this worked for me) and click OK. You must be careful with the vertices forming the circles, the you might have a problem if you didn't do the round shaped perfect in earlier steps. Also be careful not to weld together the vertices resulted from the Chamfer of edges, those are also close together.
Step 25: In Edge selection mode select the inner edges using Loop tool, after you've selected on edge from each part, and Chamfer them with an amount of 0.1. Click OK.
Step 26: Let's create another tube in Front Viewport. From Create, Geometry select Tube, change the Height and Cap segments to 1 and 15 Sides. In Keyboard entry leave X,Y and Z to 0, change the Inner Radius to 10, the Outer Radius to 5 and the Height to 2.5. Click CREATE. Convert it to Editable Poly like we did before in step 4.
Step 27: Go in Polygon selection mode, and select 3 polygons from the side, click on the square next to Extrude, change the amount to 28.6 and click OK.
Step 28: In vertices selection mode, using the Select and Move tool position the vertices along the circle.
Step 29: In Edge selection mode, make a selection of the edges you see bellow and using the Connect tool with 2 Segment and a Pinch of -61 and a Slide of 418.
Step 30: In Vertex selection mode select the top vertices and using the Select and Scale tool, scale them down in the X and Y axis to 80. Don't forget to reposition them next to the edge of the big circle.
Step 31: Again, make a selection of vertices like bellow, and Scale them down to 50 in the X and Y axis.
Step 32: Chamfer the edges with an amount of 0.1.
Step 33: Select the edges and Connect them with 3 Segments and a Pinch of 40.
Step 34: Right click on the object and click Hide Unselected. Select the top edges and Chamfer them with an amount of 0.1.
Step 35: Select the 2 polygons and Bevel them with an amount of -0.7 and an Outline of -0.4.
Step 36: In Edge selection mode Chamfer the bellow edges with an amount of 0.1. After the Chamfer in Vertex selection mode Weld the corner vertices.
Step 37: Make a loop selection on the middle edge and Chamfer it with an amount of 0.7 and 2 Segments.
Step 38: Now 1) Delete the highlighted polygons. 2) Using Select and Rotate tool and holding down SHIFT rotate the object 72 degrees and making 4 copies. 3) Attach the objects together. 4) Weld the vertices with a very small amount like 0,01-0,02 so you only lose 20 of them.
Step 39: In Edge selection mode select the edges from each side and from the middle circle holding down CTRL and using Loop tool. You need to have a total of 230(I've forgot some in the next image, but I've fixed it later). Chamfer them with an amount of 0.1.
Step 40: We now have some extra vertices that we need to Weld, but this time we will chose Target Weld. So in Vertex Selection Mode activate Target Weld and first click on a vertex and then click on the other one. This will take some time since you need to do it on all the corners 10 in total, 5 on each side.
Step 41: Select the corner vertices and using the Select and Scale tool, scale them up in the X and Y axis to 117.
Step 42: Right click on the screen and select click on Unhide All. Now create two new Tubes with the settings you see bellow. The left one with Radius 1 of 9.5, the Radius 2 of 7, Height 12, 1 Height and Cap Segments and 8 Sides. The right one with Radius 1 of 9.5, the Radius 2 of 4, Height 12, 1 Height and Cap Segments and 11 Sides. After that Convert them to Editable Poly and Attach them together.
Step 43: In Polygon selection mode, select 4 polygons from each tube facing each other and Delete them
Step 44: Select the Borders resulted from the deletion of polygons in previous step and Bridge them together with 4 segments. Click OK.
Step 45: Hide Unselected and using the Select and Scale and Select and Move tool reposition the vertices like bellow.
Step 46: Chamfer the outer and inner edges with an amount of 0.75.
Step 47: In vertex selection mode you need to Target Weld all the corner vertices from both sides. Remember to use Target Weld first activate it and then click on a vertex first and then on the second one, right click to finish.
Step 48: Now select only the inner edges from both holes on each side and Chamfer them with an amount of 0.1.
Step 49: Unhide all, Position the object so they don't overlap using the Select and Move tool and Attach them together. Add a Turbomooth modifier from the Modifier list, leave the Iterations to 1, and check the box for Isolate Display so we don't see to many edges.
EXTRA STEPS: OK guys it's time for some "Home Work". Reproduce the image bellow. I'll give you some hints. 1) Inset the polygons, 2) Arrange the vertices using select and move tool, 3) bevel the polygons, 4) chamfer the edges and 5) make a ring of the outer edges and connect them. Good luck :P
That's pretty much it. We won't built the inside of the holes since one will have the paddle attach to it and the other one will have a lid/cover. So I've you have any problems of any kind please don't hesitate to comment, i will answer you as fast as i can.
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