Which one is more accurate?
Stability is Two feeding way machine has very good stability at first, but after long-term use of difference is bigger, the PU synchronous belt general use on the platform moving machines, belt deforms after long-term use, appear even platform will tilt, the phenomenon of sliding, directly affect the registration, precision of the machine and the quality of the products. High precision ball screw after used for a long time on the surface of the oil will be gradually wear off, the machine precision is affected slightly, at this time on the ball screw and slide rail with some oil is very good, like cars, using the car for a period of time in sex would be better than just bought some, we this kind of machine in the next few months will achieve the best performance and stability of the machine, of course, in the use of a year or two will fall a little bit, but will not interfere with the machine registration, the precision and the quality of products. So it's much better to use the all-in-one tablet than the PU sync.
Cost comparison The cost ratio of servo motor and step motor is usually 5:1, the average step of the motor is about 600 yuan, and the servo motor is about 3000 yuan. Ball screw and PU synchronous belt have bigger proportion of the cost, a belt, generally a few dollars more than ten yuan, a ball screw is usually hundreds or even thousands of yuan, so the cost of ball screw + servo motor will than PU synchronous belt + stepper motor must be at least 3000 far more, and this is why the same device using different feed system after the price there will be such a big gap. Above is the universal printer and lead screw transmission belt transmission of universal printer on the performance and cost comparison, in general, as a long-term investment clients, I suggest to buy ball screw + servo motor drive universal flat-panel printers
The precision of the screw is high! The screw is made with a higher accuracy than the belt and belt, and the second is that the elastic deformation of the belt and belt is much higher than the silk bar. I happen to have the accuracy of the German isel. The repeat accuracy of the screw drive is 0.02 mm, and the double precision of the belt transmission is 0.2 mm. Hope to adopt!
In a straight line transmission system of ball screw is second only to high precision linear motor transmission unit, high precision ball screw repeat positioning accuracy can reach micron level. Relative belt transmission accuracy is quite different. In general, there is very little silk and belt production. So there's no way to compare brands.
Dynamic system comparison Image analogy, servo motor is equivalent to a eight cylinder of car, step motor is equivalent to a four cylinder car, so the horsepower of the servo motor is absolutely than stepper motor, which determines the stepping motor is suitable for small machines, servo motor is suitable for the characteristics of the machine. Transmission medium comparison High precision ball screw has four characteristics: the driving torque is 1/3 compared to the sliding screw. Using ball bearings, the starting torque is very small, and there is no such thing as sliding motion, which can guarantee accurate microfeed. There is no lateral space and rigid height; The ball screw is high in efficiency and low heat, so it can be fast forward. The PU synchronous belt is our common belt, which will be elongated over time and need to be replaced constantly. This determines that high accuracy ball screw is more durable and more stable than PU synchronous belt.
