Good Morning Guys!
Yesterday, I scaled my drawings to 1/144 scale since I am mostly dependent on pictures at this point and not plan dimensions. Last night I started making a Roller Cleat (Type 1). I completed it this morning.
I didn’t have much to go on. I had the picture I took (previously posted), with nothing for scale, and the plan sheet that I had previously traced.
I started by extruding the base.
I filleted it at 0.01”, and then laid out the lines for the non-roller part of the cleat. I started at the base with a rectangle filleted at 0.01”. Next I drew an ellipse inside the rectangle, scaled it to 98% and moved it up slightly. I then drew a polyline and filleted it 0.6” to create the loft line for the cleat arm. You can’t see it very well in the image below, but I copied the ellipse to the end of the filleted polyline, rotated it so that it was perpendicular to the polyline and scaled it down (to 75% or so?).
I then lofted between the filleted rectangle and the first ellipse…
…And then lofted between the two ellipses, using the filleted polyline as the path.
For the end, I sliced the end ellipse in half, joined the ends with a line and created a polyline out of it, and revolved it around the center axis.
For the roller part of the cleat I extruded the circle traced from the plans.
For the cleat arm, I mirrored the one I had just made.
To connect the two parts I first determined the length of the filleted polyline from before and copied and aligned the initial ellipse to the end of a line drawn along the axis of the new mirrored arm and then lofted between it and the ellipse at the end.
Next I rounded the top by adding a 0.006” circle extruded around the ellipse.
The top of the roller side arm is flat on top, so I extruded a 4-sided polyline into the arm.
…Which I filleted the edges of to 0.006”
I still wasn’t happy with it, so I tried extruding the circle I used for the top of the roller to match the end.
At this point I had to open up the top again. so I copied the initial roller part and extruded circle ring at the top of it up out of the way, rotated it 180 degrees and subtracted the extruded ring from the roller part.
I then extruded the magenta ellipse seen in the image above up through the roller part, and used the Union command.
I used the circle centers to position this piece correctly on the cleat…
…Then subtracted it from the cleat, to create the desired recess.
I still wasn’t completely happy with the sides, so I drew a rectangle along the side face, mirrored it to the other side and lofted them.
Next I added the nut seen in the recess on top by creating a hexagon circumscribed around a 0.07” circle and extruding it up.
To complete the cleat, I joined everything together and colored it gray.
Is it perfect? No! But it will do the trick, especially if you consider its size on the model. To show the scale, I imported an image of a dime and scaled it to size.
As you can see the cleat is pretty darn small, so I think it will look just fine on the model. In fact I probably could have greatly simplified how I made this cleat as far as the model goes, but like I have said before part of the fun is creating the various shapes as accurately as possible in AutoCad, or put another way, it is a journey not just a destination.