For mild steel: Tonnage = (575 × t² × L) / V, where t = material thickness in mm, L = bending length in metres, V = die opening in mm. Always add 20–30% safety margin. Your Delem controller will calculate this automatically once you enter material type, thickness, length, and die opening.

The sequence is the same on any modern CNC press brake control, though menu names differ by controller and machine builder: (1) enter the flat profile dimensions and the material type and thickness; (2) select the punch and die actually installed in the machine from the tool library — programming against tooling you do not have is the most common cause of a failed first article; (3) enter each bend angle and flange length; (4) let the control calculate back-gauge positions, ram depth and crowning; (5) run the graphical simulation to check the bend sequence for collisions between the part, the ram and the gauge, and re-order the bends if the part fouls; (6) run a first article and adjust springback compensation from the measured angle. For the exact steps on your controller, use the manual supplied with the machine or contact Rise Tek service.

For stainless steel, use a V-die opening of 8–10× material thickness (wider than mild steel) to reduce marking and manage higher springback. Use a radius punch tip rather than sharp to avoid surface cracking. Consider urethane die inserts for cosmetic-grade stainless to prevent die marks. Stainless requires 40–60% more tonnage than mild steel of the same thickness.