This is the E21 NC controller used for a torsion-sync NC press brake. How to use the E21 controller to edit a multi-step bending program. After powering on, the machine usually starts in the single-step interface.

Press P to enter the program menu. You can select up to 40 programs. We will select program number 1. First, set how many bends to perform. For example, if there are three bends, Enter 3 in the ST field.

These two fields are for the counting function. If you need the counting function. Enter the preset number of workpieces to be bent and the current number of workpieces bent here.

This is the backgauge retract delay setting. For example, if the backgauge retracts too quickly. The sheet may not yet be pressed firmly before the backgauge starts retracting. You can set a delay time. Set it to 0.5 seconds. This is the pressure-holding time.

Torsion shaft press brakes are generally set to 3–5 seconds. For example, set it to 3 seconds. Page to the right. Now you can see it is step 1 of 3. Enter the X-axis position for this step.

Also enter the Y-axis target position. For example, the X-axis bending dimension for the first step is 50 mm. The pressing dimension is 50 mm. The Y-axis refers to the cylinder stroke. For example, enter 140 mm. This is the backgauge retract function.

RP means perform one bend. Then proceed to the second step. The X-axis bending dimension is 100 mm. Perhaps this step does not require pressing as deep.

The required Y-axis angle may be shallower. Reduce the Y-axis position. Reducing it may result in a larger angle, such as 130° or 135°. Since the E21 controller does not have angle feedback.

Normal programming involves a trial pressing process. And checking whether the angle is correct. This setting is retract. This is the number of cycles. Proceed to the third step. For example, the pressing dimension is 200 mm.

Then YP can be entered as 140.5 mm. If retraction is not needed, leave it off. This is again the number of cycles. Return to the first bend step. Press the run button. Run until in position.

If in programming mode. You can switch to single-step mode. After the pressure-holding time is reached, it will automatically return. Step on the foot switch to start the first bend.

Hold pressure for 3 seconds, then return. Proceed with the second bend. After the second bend, it will automatically move to the third bend data.

Perform the third bend. After completing the third bend, it will automatically return to the first bend. The program for bending three times is now complete.

For more in-depth information and specifications on our machinery, you can view our brochures. Should you require personalized assistance or have further questions, feel free to contact us.