Recent content by tjwal

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    Fusion 360 replacement

    I modeled a finger brake in fusion. I just wanted it to fit together and didn’t try to model movements. It was quite easy compared to Inventor. It was also a worthwhile exercise as the written instructions and diagrams weren’t always clear.
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    Arduino Rotary Table for Dummies

    With no reduction (1:1) the original code will not work. On the line after where Table Ratio is defined another variable is defined const int Multiplier = (StepsPerRotation * TableRatio)/360 since it is defined as an integer, StepsPerRotation * TableRatio, must be evenly divisible by 360 to...
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    Arduino Rotary Table for Dummies

    You will have to change the variable called “TableRatio”. It is currently set for a 36:1 rotary table. Are you driving a spindle directly from your stepper? If so, there are some other things that need to be done. John
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    Arduino Rotary Table for Dummies

    If the motor is powered and enabled it will be difficult to turn by hand. This is true even without the Arduino connected. If it’s still easy to turn you have a problem with the driver/motor/power supply.
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    waterloo traction engine .29 scale

    If you’re doing cast iron then more info on the melting and casting process, PLEASE. John
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    Arduino Rotary Table for Dummies

    is the stepper harder to turn by hand when it is powered up?
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    Arduino Rotary Table for Dummies

    If I remember correctly, I hope, the enable is not connected and relies on the driver having it on by default.
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    Arduino Rotary Table for Dummies

    Enable is held either high or low. One way turns the steppers on the other way is off. The drivers I have worked with had them on by default. I think I had to pull EN high to turn the motor off. in any case with everything powered up if the stepper is enabled it will be hard to turn by hand.
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    Fusion 360 replacement

    Maybe this will work https://forums.autodesk.com/t5/fusion-360-support/opt-out-of-fusion-team/td-p/9389665
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    metric lathe thread dial request

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    Arduino control for a 3” rotary table

    Either one will give you more reliable connections.
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    Arduino control for a 3” rotary table

    QUOTE="lmeb83, post: 334299, member: 40662"]Thank you Willy. The Arduino Shield is a good idea. I'll get one. I’ve used one of these in a permanent project https://www.seeedstudio.com/Base-Shield-V2.html You also need their cables. I use the longer ones and cut them so I have a connector on...
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    Edison dynamo

    Very nice. The ephf museum is only a few hundred kms away. I’ll have to check it out someday. The large lever is to adjust the angle of the brushes and hence the rotor magnetic field angle in relation to the armature field. Since this is a DC generator it really doesn’t change the phase. I...
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    Arduino Rotary Table for Dummies

    I didn’t really document my design (pics in post 169). I lost the 3d design for the corners due to a hard drive crash. I do have copies of the STL files though. They work with the ⅛” material I had on hand so might not be of any value to anyone else. I’ve made a couple changes since the...
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    Automating Rotary Table

    Ron My posting was to start a discussion on bmacs code but rather a heads up if you’re using logic similar to bmac’s there are a few things to watch for. I’m actually using a modified version of his that works quite well. cheers John
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