Stepper motor I believe that we are using stepper motor of cent is one such distress: motor demand rotation and higher accuracy requirement for many times, but repeatedly rotating drops let's rotating accuracy, what method can deal with it? The following for our supply a processing method. Used stepping motor's friends all know that we calculate rotating the number of pulses viewpoints and we step Angle must be proportional relationship with: step Angle and the pulse number = rotating viewpoint/let's step Angle and we use drive subdivision steps must be proportional relationship with: stepper Angle = 360 & deg; Steps/segment. So we can get: pulse number = rotating viewpoint/(360°Steps/segment)Generally we understand pulse number to define as the plastic's use, convenient we calculated, so if we use the segmentation steps is a multiple of that of the 360 cases, many times under the condition of rotating point of view in the theory (Mechanical structure errors not counted)Can very accurate rotation must view, but when our high accuracy requirement,0. 1°The following), we had to choose more subdivision steps, but the capital is added. General drive about us using subdivision steps in 25000, the largest such stepper Angle = 360 & deg; / 25000 = 0. 0144°A random rotation must view can see that we cannot get the pulse of the integer value, so many times after rotating piled up the viewpoint of mistake will go beyond zero. 1°。 What's the solution? Here we supply a good treatment method. For example, we want to rotate 1 & deg; , through the calculation can get pulse number & asymp; 69. 4444, at that time we will only take 69, and will be 0. 4444 to give up, then we can have a look at, rotate at least 0 this time let's mistake. 0144 * 0. 4444 = 0. 00639936°, may be a lot of people would think that the 0. Many degrees 006 insignificant, but every time when we rotate 1 & deg; , when rotate it 100 times our mistakes can to zero. 6°, it's so affect our precision. But when will we need rotate the viewpoints of expand 100 times, in dealing with at the moment we can get to calculate the pulse count down after two decimal places, we will be the pulse error variables to record and we demand records at the moment is less turn corresponding viewpoint is still more to turn the corresponding point of view, in turn to the next point of view of time, let's demand for pulse error variable discriminant, identifying whether two rotating pulse error variable values beyond 100 (Beyond a stepper Angle), if exceed the number of pulses to us the rotating counter to add and subtract, and demand at the moment the pulse errors in the record variable values (So the next time again when rotating pulse error recognition)Piled up, so that we in many rotates, theory of error values don't go beyond a pulse of viewpoints, namely zero. 0144 degrees. So you can progress in the absence of encoder stepper motor rotation accuracy.
