VTube Overbend Calculations for Springback

Built-in Overbend Calculator

The Overbend Calculator is a built-in feature VTube-STEP and VTube-LASER that can calculate the fixed and proportional springback values to be included in the Part Setup menu. These values have an effect the final bend angles when sending new data to the bender, and when making corrections to the bender.

Steps to Calculate Overbend

To access the calculator inside VTube, follow these steps: 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.
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.