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  • Author Author: dwinhold
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PiCasso Design Challenge - Post 7 Part 2

dwinhold

Welcome back for the 2nd part of my 7th blog. This part is the motor turning the globe, proving the sewing maching motor works. The video below shows it working.

 

 

Thank you

 

Dale W

  • That poor Raspberry Pi is going for a spin dry!

  • in reply to dubbie

    Hi Dubbie

    For safety I am making a lexan shroud. Safety first!! The motor has a speed of 4800rpm, I have the pully wheels at 2.5:1 so I'm getting 1920 rpm right now at full speed minus the globe weight and drag causing the motor to slow down.

    I have to say, this is the most fun project I have done. Learning lots and making something I wanted for a long time.

     

    Dale

  • Dale,

     

    You have achieved a great solution, especially getting to be so balanced. For your project that is probably one of the major requirements, I think the wooden support structure shows how important a stable framework is for a project such as yours. It is very impressive. I also really like the fact that it still sounds like a sewing machine. It just shows that the sound of sewing comes from the motor and not from the rest of the mechanism - which is surprising.

     

    Having worked with rotating things before, having made a sizeable DC motor, I am always wary of things flying off, does your sustem have screens for you ro hide behind? I was made to use Perspex cages for my DC motor but I preferred to just stand to one side!

     

    It must be tempting to see how fast it might go, but then again, that might lead to destruction! How fast does it need to go to be effective with the LEDs? For most things to avoid flicker you need about 50 Hz which would be 3000 rpm.

     

    Dubbie

  • in reply to dwinhold

    Hello Dale, I think that 15 minutes is already a good test. If nothing has broken, there are boog possibilities that it will rung for a very long period without problems.

     

    Enrico