What is the difference between NC and CNC press brakes?

Structure
The design principle for both machines is different, it results in the different synchronous structures on both sides of the ram.
Accuracy
The ram parallelism will affect the workpiece accuracy. The NC Press brake synchronization is kept mechanically and it has no real time feedback for the error, what is more, it can not adjust by itself and will cause the low bending accuracy.
Working speed
For the press brake, we are always talking about three speeds: Down speed, working speed and return speed.
Mechanic rigidity
Because of its design, NC press brake can not bend by partial load. If it is working like this for long time, the torsion-bar will deform easily.
Crowning system
For most NC press brakes, it will not come with the crowning system as standard. The operator needs to adjust the bending angle manually before bending the official product. It will take a long time and waste material; it will also be difficult to make the product in a very precise way.