Making the Base
Now we're going to repeat the process to make the base of the phone holder. The process is mostly the same. I'm not going to go over the parts which are repeated in detail, just what's new.
It's easier to keep working on the design you already have than to start over because your existing drawing will give you a good size and placement reference. First delete the toolpaths from the previous step leaving just the rectangles which should look like this:
Then add a new rounded rectangle, the same width as before. Mine was 3.1 inches, but this time make the height larger. I made mine 2.5 inches tall. Place the new rectangle over around the old one like so:
This piece is to provide the phone stand a solid base. I've chosen to put the phone forward of the center of the piece because I like the way it looks.
We are going to make the hole through the pieces we cut before extend into this bottom plate. This cut is called a pocket. A pocket is a cut which does not cut all the way through a piece of material, but instead leaves a pocket.
To insert a new pocket select the inner rectangle. It will turn red when it is selected.
Then click "CAM" -> "pocket operation"
This will open a new window which provides you with a LOT of otions.
Many of these will be familiar from the the options we filed out for the profile cuts in the previous step, however there are some new options as well. The new options are "step over" and "roughing clearance".
The step over will set how much the bit moves over with each cut. Think of it like "step down" but in the X,Y plane. In this case step over is given as a percentage of the tool width. The smaller the step over is, the cleaner the cut will be. The larger the step over is the faster the pocket will finish. Pockets can take a LONG time.
The "roughing clearance" is a setting which will leave a little bit of material in the pocket to be cleaned up at a later time. This is useful if you want to use one tool to remove most of the material in a pocket, and then a different tool or setting to finish it with a cleaner cut.
We're doing a rough pocket so we're going to use a large "step over" and no roughing clearance.
I set my settings like this:
Note that the final depth of this pocket is only .1 inches, so the pocket will not cut all the way through our .25 inch plywood.
Click "OK" to close the window. The pocket will now be shaded in to indicate that it will be cut.
To calculate the tool paths for the pocket click "CAM" -> "calculate all". You will now see the toolpaths appear to cut the pocket.
Add a profile cut to the new large rectangle using the same settings as before.
And recalculate the toll paths.
Add some tabs to hold everything in place.
Save your gcode like before and open it in ground control.
Set up the cut the same way as before.
And cut it out.
You can rub off the burs that are left from cutting with a piece of sand paper, then glue all of your pieces together, and you've got a phone stand!