Group 04 meeting 13

            On the meeting 13 group decided to create a "mirrow " of the project which will help the project land easily. As a result of that the hopper should have 4 legs by using 4 springs and 2 xl motors

Group 04 meeting 12

      The group have met to evaluate the project and testing. Also, group have made a few photo of the entire view of the hopping machine

Figure 1

On Figure 1 shows the prototype of the model that how it should look.

Figure 2 

On the Figure 2 shows the the gears that work though the XL motors .....

Figure 3

On the Figure 3 is showen the leg which is conected to the sptings and XL Motors what alows a model to jump.

Figure 4 

The Figure 4 shows lock possition of the leg.

Group 04 meeting 11

      The group keep they weekly meeting beside the class to work on the project more intensively.
    The group have faced the problem that mechanism wasn't able to jump. So the group decided to change a little bit a body and make it lighter and that will give the stings more force. The body get the different look, but now it looks more like a grasshopper. The hopper was built by using the LEGO part which is mimic the body of the project also, it includes two XL LEGO Motors which is connected to springs and legs that are built from the Lego’s parts. The first jump of the hopper was weak because the body of the mechanism was heavy and the spring doesn't have enough force to make it jump. Over the weekend, the group have tried several different ways and calculation to figure out have improved the solution. Finally, the group come up with an idea to rebuilt the body and make it lighter as a result of that, it will give the springs more force to jump. The power hopper will receive from two motors, which will be attached to each leg. The motors will be connected to the 9 Volt Lego’s battery. Such as battery is heavy group have decided to attach the long extension to the motors and placed the battery on the wheels. That will give the battery ability to follow the hopper and will let hopper make safe jump and land. However, the spring is attached to each foot and gears. The hopper has a four legs that give mechanism the stability to land safer. The motors are operating the legs by uncock and cock the legs back by it selves. The hopper makes jump about 6 inches and has landed by coking legs back and it has the ability to repeats that process several times. Each hopping cycle is about 4 seconds. The biggest accomplishing was to make it jump and land safely.

 Here the group has provided a video of the way how the legs will work.

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Group 04 meeting 10

                This meeting group tested the XL LEGO motor to see the torque. The motors having a good torque's moment. Those motors will make the mechanism to jump. The group will put two the same size motors on each of the legs. The other thing that group have done on this meeting it is a concept sketch which will give the reader an idea how the final project should look like.

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Group 04 meeting 9

     The group continues to work on a way to make the spring in the mechanisms leg charge and discharge. During the meeting, they found a video that displays a viable method of doing so. The video relates to a gun, but the mechanism that it uses for stretching its rubber bands has a good chance of working for the jumping machine as well.

 The group decided to try to do something similar with the jumping mechanism. The group will work over the weekend on how they want to do it and if that will work for their project. The group will need to do some testing and see how it goes.
     The next meeting will be in the lab section. By that time the group will have to finish building the prototype and concentrate on the testing, adjustments and evaluation. After all, the group have to start their final report preparation.

Group 04 meeting 8

          Over the weekend were bought others springs and the group tried to mimic the legs of the future model. Now group trying to figure out how to make it jump.

Group 04 meeting 7

    The group holds their weekly meeting outside of class to work on the project. Here the group has all the parts and tried to build the first leg. The group is using mainly LEGO parts for this task. The group built the first leg but there was a problem with the spring. The spring didn't give us the strength that was required. As a result, the group decided to get stronger springs. 
       The next meeting is going to be in Monday lab's class.

                           The motor that should be used for the project

Group 04 meeting 6

The group met on Monday on the lab. The main thing that group work on was project's documentation what is also very imported part of the Engineering projects. The group has listened a feedback from the professor on the proposal and worked on improving that. 
   The next group meeting scheduled  on Thursday as usual. For that meeting group has to get all the part that need for the project and start built that.