Laser engraver steps per rotation calculator Laser engraver rotary steps per rotation calculatorThis form is used to assist in calculating your steps per rotation for your rotary tool in LightBurn. Once your steps per rotation is set you will not need to change it. With this form you can eliminate the guesswork that is shown in countless videos on the subject. NOTES:To calculate the proper steps per rotation value it helps to have an evenly cylindrical (non tapered) test piece. If you choose to use a tumbler or other piece that you plan on putting tape on to protect the piece while doing the test, make sure the tape is as flat as possible and measure your diameter with the tape in place to get the most accurate value. Making your test fileTo make your test file, create a rectangle in LightBurn and set the height to the circumference value you calculated in the rotary setup window. You can copy and paste the value from that window to the height setting in the upper left corner of the LightBurn screen. You can set the width to something like 6 mm if you are working in metric, or 0.25 in if working in US/imperial measurements. Now set the engrave mode to line, DO NOT use fill mode. Run the test file on the object and see if it overshoots or undersoots/misses the full circumference. Use a piece of paper and mark the amount of overshoot/undershoot on the paper and measure with a caliper. Measuring directly on the piece with a caliper will not give you an accurate measurement as it will not take into account the curve of the piece. Using the paper method and measuring that will eliminate the curve. CONGRATS: You now have all the numbers you need to correctly calculate your steps per rotationCurrent steps per rotation*Object circumference*Overlap or underlap*New steps per rotation value Related Images:
