Does steps per rotation change with different size cups, for example I have a 86.65mm diameter, the wheel diameter is 68.49 on the rotary and the steps per rotation that works is 7680.
For a larger or smaller diameter cup the steps per rotation changes, shouldn’t the steps per rotation be constant? I looked at the chart and the steps per rotation for my machine should be 5000.
Steps per rotation is a fixed, constant value that is affected only by the motor driver steps, the motor, and the gears or pulleys connecting the motor to the rollers. Once you have the number you should never need to change it unless you change one of the above.
If you have a roller rotary, the wheel diameter of the rollers is also constant and should not change. The exception would be if your objects are tapered, and you’re engraving at a different spot than the object is being driven. In that case you may have to play with the Y scale of the job (or the roller diameter) to get the look you need.
Hello, When I run a test with my steps per rotation it doesn’t reach all the way around the cup. The test I am running is I put a piece of tape all the way around the cup and in light burn draw a rectangle the same circumference as the cup. Then I run the laser, if the steps per rotation were correct the rectangle should meet together right?
Correct - If a rectangle with the vertical set to match the circumference doesn’t go all the way around, the steps count is too low.
The problem I’m having is I have to change the steps per rotation with each size of the cup
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Does the type of rotary you have match what is set in LB? There are 3 different styles and you need to select the button next to the right style.
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