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Step 5The frame
Constructing the frame:
In this step we will be building the main part of the gun, the frame. The frame holds all the bits and pieces together and creates the main shape of the gun.
Tube mounts:
Search around for a piece of metal that will happily bend to 90deg without snapping or fraying. Drill a hole the size of your tube (or slightly smaller) and bend it into an extended "U" shape (see picture #1) then proceed to drill the second hole on the other side.
Motor plate:
This is the part that holds the motor to the tube mounts. It is a simple shape to create only having to compensate for the protruding shaft bearing of the motor. Simply cut a piece of metal into a rectangular shape, and then make it able to fit the motor and drill small screw holes to hold it in place. Hold the tube mounts against the motor frame until you are happy with where they will be mounted (along the same centerline as the motor shaft) trace around them then cut off any un-necessary pieces of metal; to create a much more comfortable shape.
Welding:
Weld the tube mounts to the motor frame, and then grind/file away all the chunky bits. screw it all together and see how it all lines up, Its probably best to test that everything is working well before you proceed to the next step. The mechanism head should be grinded flat and the have a 1mm hole drilled in the center of it (sorry no photos shown). You should then bend a pin to connect the 1mm hole in the cam to the 1mm hole in the head of the mechanism. Put power to the motor and see how everything works (mine worked the first time... to my surprise! See video). Now since there is so much exposed metal we will have to paint it to prevent it from oxidizing and rusting later. Un-assemble the gun and begin painting the frame I used some old pot-belly black paint found laying around the in the workshop; it did the job just fine.
In this step we will be building the main part of the gun, the frame. The frame holds all the bits and pieces together and creates the main shape of the gun.
Tube mounts:
Search around for a piece of metal that will happily bend to 90deg without snapping or fraying. Drill a hole the size of your tube (or slightly smaller) and bend it into an extended "U" shape (see picture #1) then proceed to drill the second hole on the other side.
Motor plate:
This is the part that holds the motor to the tube mounts. It is a simple shape to create only having to compensate for the protruding shaft bearing of the motor. Simply cut a piece of metal into a rectangular shape, and then make it able to fit the motor and drill small screw holes to hold it in place. Hold the tube mounts against the motor frame until you are happy with where they will be mounted (along the same centerline as the motor shaft) trace around them then cut off any un-necessary pieces of metal; to create a much more comfortable shape.
Welding:
Weld the tube mounts to the motor frame, and then grind/file away all the chunky bits. screw it all together and see how it all lines up, Its probably best to test that everything is working well before you proceed to the next step. The mechanism head should be grinded flat and the have a 1mm hole drilled in the center of it (sorry no photos shown). You should then bend a pin to connect the 1mm hole in the cam to the 1mm hole in the head of the mechanism. Put power to the motor and see how everything works (mine worked the first time... to my surprise! See video). Now since there is so much exposed metal we will have to paint it to prevent it from oxidizing and rusting later. Un-assemble the gun and begin painting the frame I used some old pot-belly black paint found laying around the in the workshop; it did the job just fine.
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