Motion control card is an upper control unit based on PC and industrial PC, used for various motion control occasions (including displacement, speed, acceleration, etc.).
There are many motion control card brands on the market, and there are many series of the same brand. How to choose? We will focus on the following four points.
Think in terms of function
The functions of motion control card generally include return to zero, constant speed, point position, linear interpolation, multi-axis linkage interpolation and arc interpolation. Users should choose according to their own needs, the requirements of the function can meet their own use, do not need the function is cumbersome. In general, the more features, the higher the price. Therefore, in the choice of functions, the utility as the standard, but also should consider the future expansion.
Think in terms of performance
The performance of motion control card generally includes communication speed, response speed and control speed (pulse speed). You are advised to calculate the required performance indicators based on the maximum requirements of your application and reserve about 20% of the required performance indicators.
In terms of reliability
With motion control cards, the stability of motion control cards is very important. Because the stability of a control system, is composed of motor, driver, power supply, motion control card hardware, software. General can pass the market test of motion control card, in isolation design (such as power isolation, optocoupler isolation, etc.), filtering and protection (limit protection, interface protection) are considered, the ability will not have much difference. If you have experience, you can observe the circuit on the control card, the analysis of the ground line, can be judged; If there is obviously no optocoupler (or magnetic isolation), or if there is optocoupler but the ground is still together and not separated at all, then the reliability is not very stable. Simply put, how to deal with the ground wire on the board, you can quickly judge the reliability of the hardware.
Think in terms of ease of use
Ease of use includes hardware ease of use and software ease of use. The usability of hardware requires convenient and practical connection, from the perspective of user convenience and practical consideration. The usability of software includes the quality of documents, the quality of routines and the difficulty of starting the software. The important thing is to be able to quickly and effectively complete the functions you need, rather than being very complicated and difficult to use. Time is also a cost.