SEVENTEENTH WEEK

XABI

This week we have started with the last challenge. In terms of what we have proposed are 4 days of exercises to begin to understand the Step 7 program and for the rest of the challenge is raised to complete the assembly of the model by configuring the screen for the digital use of the model.

Now we are finishing the third exercise where we had to program the function of the machine that appears in the image1. valve 1 opens until the sensor below detects that there is sufficient weight for the next mixture, then valve 1 closes and valve 2 opens for 5s. Then valve 3 is opened until the desired level of mixture is obtained, and that is when the motor is activated for 10s to mix the two compounds. So that the mixture is not wasted, the valve 4 will open when there is a bottle in the lower part, and for this it will depend on the detector D, sensor L and tape C.

Image1

When programming the most remarkable thing we have seen so far is the "SCALE", this function serves to make the equivalence between analog input values. The result changes in size but maintains the proportions.

LANDER

This week we had the exam and the final presentation in the beginning of the week.After that we started with the new challenge called "Power supplier failure", where because of a failure all the data and program it's lost and we have to program it. To start with the challenge we needed to do 4 exercises  in Graphcet and we did 2 of then, one about a traffic light and the other about a botlle filling proccess. The last day we started the third exercise.

GAIZKA

This week we started with the new challenge, challenge 2. We decided to do a couple of exercises to deliver them and focus on how important the model is.

One of these exercises had to do the following:

A tape transports bottles to a labeling station. This station consists of a rotating platform and a label applicator, along with two cylinders to push the bottle.
It can be assumed that the process is started and stops (at the end of the cycle) with the BMarcha switch. When a bottle arrives at the station, 0.5 seconds will be expected, after which a Valid signal will be set to 1 if the bottle is valid (it has the other label, is the right size ...) or 0 if the bottle is not valid
In the case of an invalid bottle, a cylinder will push the bottle out of the line, for which KDefecAvance will be activated until SDefec1 and KDefectReturn are activated until SDefec0 is activated.
If the bottle is valid, the KGiro output will be activated, which rotates the platform where the bottle is located for 0.2 seconds, at the same time it sets the signal KApplication that places the label on the bottle to 1.
After this, a cylinder will push the labeled bottle towards a belt that is continuously moving.
The outputs and sensors involved are: KValidAvance, SValido1, KValidoReceso and SValido0.
In any case, the automaton must also control the feeding belt KCinta, which must be stopped if there is a piece on the platform, which is warned by the sensor SExisteBotella