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Part 2: Building the Motor Box
The components purchased in Part 1 will now be assembled into the motorbox unit for the spray booth.
initial motorbox construction cardboard mockup of motorbox case
motorbox construction with hardboard gluing wood strips on sides for mounting lid
Motorbox construction. Height of the box is larger than the diameter of the fans. Each panel on the side of the box is 4" tall and 8" long, and they join at the center of the motor shaft.

The width is as narrow as possible to allow the fans to have enough motor shaft to slide onto. The fan blade on the brushes side was designed to allow brushes to be placed inside the fan; this will not be possbile now.

Note how the t-nuts are close to block edges.

Cardboard mock up of motorbox.
inside of motor box is painted
 I painted the interior as I didn't want any exposed wood, and as the sides are not interchangable.
test fitting the top
 wiring diagram
switch and terminal block mount to top
 completed top set on box
Building the top. The top is test fitted with the switch to make sure the switch will fit and not move.
Wiring diagram.
Terminal block attached to underside of top. Top is then test fit on box.
showing how speed controller fits on box sides
 another view of speed controller mounting
These photos show how the speed control fits into the stripwood strips, the corner, and the lid.
motorbox painted gloss green
The box is spray painted gloss green. 		final assembly of motorbox
Motorbox after final assembly.
Why wasn't the original motor connector plug used?
I couldn't find a male end to fit.
What is the large hole in the lid?
There is also one in the floor. This is for ventilation. I don't think I will run the motor long enough to get hot, but in the event it does, there are passages for the heat to escape.
What is the yellow label on top of the lid?
This was a wiring diagram I glued on, but I scraped it off when I painted the box.
Why are the top side panels attached with screws and the bottom panels glued in place?
This is so the box can break down in order to remove the motor.
- JH -
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