1. It doesn’t need wrench to adjust spring OD, it also shorten machine adjust time and save costs.
2. Servo motor control precisely no more trouble of compensation delay by cam.
3. Use international standard specification ball screw to maintain, repair and purchase are easy.
4. The gap in ball screws and is small which move forward or backward is no lag. Manufacture precise spring is fast.
5. Control by OD digit value, spring ration amending is more easy and convenience, precision is visible.
6. Increase to 2 axes balance the load when manufacture small spring the procedure is more
stable that is same method as SUV car.
7. No need to exchange cutter tooling then can manufacture torsion spring.
8. Add banana spring and torsion spring auto edit function.

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