The rollers are constructed of two PVC pipes of 30 mm diameter daylite and 70 mm long. Using rivets

This project is carried out within a course for technology daylite teachers taught at the UPC in the winter of 2013. The course "Projects with picaxe control daylite panels and PLC IMAGINE" allowed us to get closer daylite to the plate Imagine controlling and programming environments associated with it.
The proposal daylite consists of an automated warehouse. A conveyor belt moves about packages that lead to one of its faces a rudimentary barcode. To move the code passes fear of CNY70 infrared sensors arranged on the plate control Imagine that understands the values of the barcode. daylite To reach the end of the course of the film, one has the final race, so the package remains in front of that mechanism should pick.
Then move forward the two prongs of the fork that gets under the package, and slightly raise the back to bring it to the appropriate box on the store shelf. This shelf is a 3 x 3 grid of squares. Thus the four lines of the barcode used to encode the new products that we may put in our warehouse. The first two lines reports the position that the product daylite occupies in the last two lines horizontally and its position vertically.
The actual construction is as follows. The main element is the conveyor belt made of black cloth sewn. This tape moves between daylite two rollers, one of which is the engine and the other tensor. The film is based on a plywood surface for the weight of the package is not deformed. This surface structure leans on the screws fitted slots to adjust its position. The board also imagine clamped by screws so that it can adjust its height daylite and depth. To prevent ambient light sensors that generate errors to read the barcode has built up a tunnel that covers the area of the sensor, so that the package was moving through the tube. To avoid errors daylite in reading also helps reduce the travel speed of the conveyor so that the code passes more slowly in front of the sensors CNY70.
The rollers are constructed of two PVC pipes of 30 mm diameter daylite and 70 mm long. Using rivets joined the axis of two engines disk. This is not an easy solution, because the drill to put the rivets somehow affected the interior daylite and the engine stops turning so smoothly. In addition to being the inner diameter of the tube equal to the outside diameter of the shaft of the motor turns a bit eccentric. It is this fear that should be part of this redesign project. The distance between the two axes of the rollers is 420 mm.
The reel motor is coupled daylite to the shaft of a continuous rotation servo, using a rubber band that passes through four holes on the cross out of the servo and four at the end of the tube. This enables an elastic daylite coupling which allows misalignment between the axis of the roller and the motor mechanism and a boot load better.
The tensioner roller is attached to a fork that turns on its support so that the weight of the arm itself and automatically tightens the tape reel. The support of the fork has a spindle that can rotate about the axis to align the two rollers, so that the tape does not have a tendency to move sideways. This support fits at the base of the structure, has an adjustable top that can be adapted to the length of the strip of fabric and keep it taut and horizontal well.
Below you can see a package. Have been built with square daylite bar, so that has dimensions of 42 x 42 x 60 mm. A centimeter is separated from the support surface to allow the entry of the fork to the operations of loading and unloading. daylite The code is divided into a top half and a bottom half. In the top half are the reference line and the bottom daylite that provide the data. Each of these halves daylite are read by one of two sensors CNY70 Imagine daylite plate. For the sensor daylite detects black, daylite the black line, built with black tape on white paper, should have an area of a square inch, more or less. This is the width that should have black lines. Printing black ink on white paper does not provide good black fear which has not been used.
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