[WIP] Shooting a lookout I have already spoken several times of my lathe ... which in recent times more plastic than plant Wood actually. This time, I'll go into more detail with a gun carriage in WIP. For the model of turn, it is a
Proxxon DB250 machine from 1000 to 5000 revolutions per minute.
This tour consists of the frame (4), a mandrel (1), a tool holder (2) and a tailstock (StuffCC thank you:)) in (6). The latter keeps in line a room in case it is too long or too wide. Without this maintenance, the piece that retained the side of the core tends to vibrate. This vibration generates an oval cup and not perfectly circular around the tube.
To begin, you must obtain full PVC tube to be machined. We found for example in the hardware or hobby store.
We bring a portion of the tube on the mandrel. In my case, I use a chuck with three branches.
Once the room is tight, you can bring the tailstock. The cutting process can begin. Issue tools, I use miniature chisels. No surprise from this side, the plastic working with the same ease. The only point that needs to be careful is the temperature. If the tool is too long in one place (several seconds) then it will melt the PVC.
I begin by coring the largest volumes. The most important being not to remove too much material as you can not go back! I mark in pencil directly on the tube the width of the various cylinders. One can see that for the moment, the plastic surface is rough, the care and finesse to come after finishing. The rule is simple, more material is removed at once, over the surface will be rough.
It may be noted that the center of the cylinder is not perfectly straight. We can catch these differences in shape by putting a file directly on impulse with the movement of coming and going. Exactly as if we filed her room, except that the tower is working for you!
can then pass on the look of the gun. The room is small and tight enough to remove the tailstock without risk.
And now, it only remains to separate the part of the trunk are! For that I use a model that I saw just asking about the room to place the desired cut. The machine running at 1000 rpm, it effortlessly and cleanly that the room is separated. To finish, I use a paper towel and an old toothbrush that I use back and forth on Exhibit engine running. This report provides a very smooth.
can go into the details: From the sheet of 0.3 mm and 0.5 mm on the cylinder, a punch for the holes, my machine rivet and plastic gears found on Ebay. Here is the final version:
This gun will soon be used for a large turret. To be continued!
