Hello Im working on project that will use motor to open a door. Im trying to fig

Question

Hello Im working on project that will use motor to open a door. Im trying to figure out what size m otor im going to need. The door is 36in wide x 83in high x 2in thick out of oak wood. Ive attached a hand sketch of what ive done so far. 1. Need find out all forces acting on door and all three hinges. Body diagrams needed. The door will be opening @ angles of 45, 60, 75, and 90 degrees. 2. What is the force and torque required to open door @ 27, 18, and 9 inches from the hinges. Any extra advice, ideas or information needed please let me know.

Explanation / Answer

This is a solved problem. Handicap accessible doors demonstrate the solution. Look at a conversion kit to get an idea of where to apply the load, and how much torque is needed. Just look at the online specifications and geometry. http://www.allsecurityequipment.com/proddetail.asp?prod=950BM-10RD-10EMRkit http://www.allsecurityequipment.com/manuals/faac-950bm-manual.pdf Sliding doors (not hinging) are best because you are just moving the center of gravity linearly, not fighting the moment of the system as well. You do not want "just enough" but want to over-do it. If the solution is going to last then it must be constructed robustly and that requires operating life and duty-cycle considerations to be taken into account. This is something you want to run more than once, or more than once a day, in all kinds of weather, without maintenance so be sure that it can do the job.

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.