You will learn how to easily and fast a 3d model of cinch connector in Rhinoceros in this quick help.
I have left out some parts and details, so you can try that out by yourself.
Ok, lets begin. First, using circle command you make one circle with center in origin of coordinate system (that is 0,0). Start in Right viewport. As I usually use my slide rule tool to measure dimension, I have my round measures in diameter, not radius. So, when you clicked where the center of circle will be, next you need to specify in command line that you want to input Diameter (you can, of course, divide my diameter by two, and input radius, if you feel like doing more work). Now, input our first diameter, so type in command line 3mm (that is 1.5mm radius in case you were wondering). Note that I used millimeters, so one box in grid is one millimeter.
Next, we need another circle, with the center positioned like the last circle, but bigger diameter. So, start circle command, type in 11.5mm and hit enter.
Next, we need the third circle, that one will be the same diameter as last one (11.5mm) but we will move it by 15mm right looking from Front or Top viewport. Using copy and past commands you can copy that circle, and using move command, you can move it by 15mm. Now, another circle, just 3mm to the right from the last one, and make that circle 7.4mm in diameter. Copy that circle, and move it to the right by, again, 15mm. Now, copy the first circle (the one with 3mm diameter) and move it right so its center is in the same place as the last circle (that is 33,0). You should have a series of circles like on the image below:
Now, using Loft command, start clicking on circles the same order as we created them. When prompted with loft options, select from drop down menu Straight sections, and click on Closed Loft check box. That should make you a base model like on the image below:
In this step we will be making some details. So lets start from the right side.
First, create in Right viewport a rectangle 1mm high, and make it longer than the smaller diameter part.
Move that rectangle by 2 mm left, and position it in the middle of our base model:
Next, create another rectangle, and position it like on the image (here you will find very useful snap turned on, and in osnap End property.
Copy that rectangle, and move left by 2mm. So there is 1mm between each rectangle. Keep doing this step until you have six of them. Then, you have to mirror them according to the middle of your base model. Check the image below:
Now,using ExtrudeCrv command extrude those rectangles so they go outside of your base model. Make sure you have Both sides to Yes, and Cap to No.
We will use that extruded rectangles to trim our base model. So, using trim command, trim off outside of your rectangles (easier if you do it from Top Viewport), and base model too (easier from Front viewport – look the image below, where the red dots are, you need to click [while in trim command of course]).
Using FilletEdge command, fillet the upper left edge of our base model. Set the fillet radius to 0.3mm. You should have something like on the image below: