Overbend Calculator
Written by Michael Cone
Updated at January 30th, 2026
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Reduce Scrap & Save Material by Predicting Springback BEFORE Bending the Part |
This is software that calculates overbend necessary to overcome springback in bends.
Three Step Process for Predicting Springback
- STEP 1: Two test bends are made. Typically they are 20 and 120 degrees. The bender is set to bend these angles and a test tube is bent.
- STEP 2: The actual resulting bend angles are measured and entered into the overbend calculator.
- STEP 3: Formula constant values are calculated and used in a springback formula to predict overbend to overcome springback at any angle.
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The Overbend Calculator is also embedded in VTube-STEP and VTube-LASER because the fixed and proportional springback values are included in the Part Setup menu - and have an effect on sending especially new data to the bender. To access the calculator inside VTube, follow these steps: |
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| STEP 1: Right click anywhere in the white column in the Part Setup menu. |  |
| STEP 2: Choose "Show Overbend Calculator" in the context menu (the popup menu). | |
| STEP 3: Make a part with two test bends. Typically they are 20 and 120 degrees. The bender is set to bend these angles and a test tube is bent. |  |
| STEP 4: The actual resulting bend angles are measured and entered into the overbend calculator. |  |
| STEP 5: Formula constant values are calculated and used in a springback formula to predict overbend to overcome springback at any angle. |  |
| STEP 6: Press the "Save to Part Setup" button. The values will now be displayed at the bottom of the Part Setup menu. |
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| These two calculated values will be used to calculate overbend to overcome springback when sending data to the bender. This image shows a button inside the Bender Setup menu in VTube-LASER. |  |
