Mechatronics Sequence Kit Site Report

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Site Report (High-School)

Hiroshima Technical High-School Mechanical Course (Teacher Ochiai w/ 10 Students)
Session Outline At this school, the students of year 3 for mechanical course are required to attend to this sequence control training for more than 8 hours (4 hours * 2 sessions) in June every year. When we visited for observation, it was the second session and the students already understood AND / OR circuits and motor driver circuit. All 10 students were present with one training kit each. The session was started by Teacher's explanation about relays and the circuits on task. Then, the students tried to actually make the circuit using the training kit. The training for the day was a self-holding circuit with limit switches and motors. It required operations from start to release the self-holding function.
Session Atmosphere Each and every student had shown serious efforts at his respective pace. Whenever questions arise, they asked to the teacher or classmates not to fail. The reason was that Teacher Ochiai announced at the start of session that any blowout fuse for the second time and onward must be paid from their pocket.
Students' Comment During the training, we interviewed all students. The most frequent comment was: “It was rather hard to actually make the circuit than understanding it through the circuit diagrams.” Followed by “The difference between a-contact and b-contact were clearly understood.” “How the self-holding circuit works were well understood.” “This training may be helpful in the future.” Upon asking after the training session, there was a consensus that “Wiring connections in the circuit using relays were perfectly understood.”
Teacher's Comment Since the students of mechanical course are familiar to handle visible events, they do not give much care to the black box. Accordingly, it is hard for them to follow the discussions if it is started from IC at the first place. When it is started with relay, however, it greatly helps them to understand it and IC as an extension. Even though IC internal structure is invisible, the relays in the Mechatronics Sequence Kit can be monitored with sound for easy understanding. We have been using this training kit for four years now. Since the available training kits were less and shared by two students at the earlier years, it was hard to make them serious since they blamed on to each other for the failure. Now we have enough to assign one kit to each student so that each and every one takes it seriously. Since relay is the basic of control, I want to give them as much as time to understand well enough. I hope that they can be able to make wiring for lath machine at least.

Matsue Technical High-School Mechanical Course (Teacher Fujiwaki w/ 5 Students)
Session Outline With 5 students, the sessions of the self-holding circuit as a base of the sequence control as well as application circuits with push button switch are conducted. Using one training kit each, the day's session lasted for 5 hours.
Session Contents Teacher wrote a circuit on the blackboard. Then, the students made the actual circuit. However, the key points were asked to the students to induce them into consideration before starting. Which contact to be applied is also questioned upon using relays. It looked harder than making the circuit simply.
Teacher's Comment At mechanical course, more than 5 hours of training session is assigned for the students of year 3. The session includes AND / OR circuit and relay interlock as a standard with options to advance to the circuits using push buttons and timers. Since we have only 5 training kits and one kit to each student is desirable, the session is given 5 students as a group. Depending on the understanding level of the students, the session contents are changed. Since timers and counters are provided in the mechatronics sequence training kit, it is easy to arrange the sessions. In comparison with the other materials, there are more wiring to be connected thus helping each and every student for easy and better understanding about the sequence control. Some students can understand it by theory alone but others definitely need to actually touch the goods before understanding.

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