The most appreciated feature of 3D printing pens is its ability to help make freehand 3D objects easily in space. It is a difficult task to accomplish. Making a different drawing especially in empty space is a difficult task. You need a lot of practice before you start making good shapes just like you see in various advertisements. So, don’t lose heart if you are not able to make it your first attempt.
To start making a 3D sketch, you need to begin with a specific anchor point. Create a big dot of plastic on the paper you are using. Then gently lift the pen into the air while releasing at a low speed. Make sure you maintain the same speed of your hands as the release button pushes out the plastic. If you wish to make a straight line, hold the pen in line along with the plastic and slowly pull on it. A small amount of rigidity will help keep the plastic line straight, while it cools. When you are at a point where you want to finish your line, stop releasing plastic and hold your pen still for a few seconds. kids can Found on Dads Toolshack at home.
You can let the plastic cool quickly by blowing it gently or using a small fan to do the same job in work area. Once the plastic cools and becomes firm you can pull your pen away.
The plastic that is being melted in the nozzle might leave a small trail or point in a string. You can easily trim this using wire cutters or scissors. The most important and even difficult thing to draw 3D freehand sketches is to maintain right space while working. The plastic can sag if you do not move your hands with the same speed as the extruder.