Recent content by Diamond Dave

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    Robot navigation using GPS coordinates with two ultrasonic range finders

    I used the example of machining only because that is what I do develop cutter paths for C.N.C. machines. Way-Point software would be closer to what I am thinking would work it is designed to work with drones. Draw a trapezoid shape that I create on a tablet or inside the program and from that...
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    Robot navigation using GPS coordinates with two ultrasonic range finders

    Actually the platform or donner that I am using is a Jazzy Mobility chair with dual motor differential. Using a Sabertooth 2 X 60 regenerative dual motor driver also known as 2 X 60 H-Bridge ( www.dimensionengineering.com/products/sabertooth2x60 ). I have an Android version 5.1 phone, have not...
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    Robot navigation using GPS coordinates with two ultrasonic range finders

    What accuracy do you need, 1 mm? 100 m?.... Plus or minus one inch Are there DGPS transmitters to assist? ...... major city heavily populated 2D or 3D motion? .......... 2D just a simple "X" or "Y" move How fast does the robot move?........ Walking, Fast Walking or jogging
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    Robot navigation using GPS coordinates with two ultrasonic range finders

    The ultrasonic range finders are (Kinda-Sorta but not really like) eyes for the robot to see. Just in case some silly little wabbit hops into the path of this 300 Lbs. Robot while it is on a mission. It will stop or avoid the object ... can't overlook being O.S.H.A. approved.
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    Robot navigation using GPS coordinates with two ultrasonic range finders

    Ok, the reason for my absence is I have been working on a project of building a multitasking Robot. Since the connection of Robots to Physics never entered my mind I assumed I have nothing of value to add to any discussion on the PhysicsForums. If anyone is interested in the problem that I am...
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    Maintaining -320°F Liquid Nitrogen for Injection Molding

    So instead of the LN2 being in the line behind the mold for 20 sec. after the material is packed. Do you think it would serve a better service to give a quick shot before the plastic is packed. Chilling the cavity before the hot plastic reaches the area would have the same effect. The tool I...
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    Maintaining -320°F Liquid Nitrogen for Injection Molding

    I have a plastic injection mold, the part I am running has hot spots in the part when it is being shot in the mold. Would like to try to incorporate a closed loop plumbing system to carry liquid nitrogen past the back side of the cavity in hopes to pull the trapped heat from the hot spot area...
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    Angle Elevation of King's Chamber in Pyramid: Get Answer Here

    I tried looking at the links and the unit of measurement ... was enough to make my head spin. The forearm of a Pharaoh = 1Rc, are they saying 7 palms make 1 RC also are they claiming it takes 4 fingers to make a palm. So I should ask " HOW BIG A BOY IS THIS PHARAOH "
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    Angle Elevation of King's Chamber in Pyramid: Get Answer Here

    I tried looking at the links and the unit of measurement ... was enough to make my head spin. The forearm of a Pharaoh = 1Rc, are they saying 7 palms make 1 RC also are they claiming it takes 4 fingers to make a palm. So I should ask " HOW BIG A BOY IS THIS PHARAOH "
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    Angle Elevation of King's Chamber in Pyramid: Get Answer Here

    I have posted this question in other forums and received nothing for an answer, So it's worth a shot here :-) What is the angle elevation of the king's chamber in reference to the base of the X,Y,Z center of the pyramid? Or should I ask the question this way? Measuring from the center of the...
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    2 questions I wish I had gone to school for this

    if anyone wishes to answer my questions would it be too much to ask you to e-mail me the answer. Because I get notices that people have answered other questions, For the life of me I don't know where the answers are going to... all I see is the alert that Mr. or Mrs. Peoples answered my...
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    Anyone know of a good source for ordering magnets?

    I looked online and found Monroe Manufacturing north of Detroit sells them and they are some what local but when I went it to buy a half dozen... They said they were out of that model and can only sell a 30 piece min. He was nice enough to tell me about magnets 4 less, But the website is not...
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    Anyone know of a good source for ordering magnets?

    Does anyone know of a good source for Neodymium Magnets I tried Magnets 4 less but the website seems to be not working.
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    Can a charged capacitor turn a permanent magnet into an electromagnet?

    ***************************************************************************** I was once out strolling one very hot summer's day When I thought I'd lay myself down to rest in a bit field of tall grass I lay there in the sun and felt it caressing my face As I fell asleep and dreamed I dreamed, I...
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