How many drivers do you need for a few steps?
If you have two motors that are in sync or in the opposite direction, the other speed is consistent with the motion, you can drag two or more. But there is a possibility of burning motors. Because drives the output current of certain, if a drive with multiple motors is bound to the current amplification of many, once the line fault, the total current is applied to a motor, so are likely to burn out motor, so don't recommend this.
If you require nine steps to enter the motor, you will need nine lines to control the switch, and one driver will only be able to control all or all of the stops. If your 9 motors need to be controlled at the same time, then a driver can be. But in theory, you could do that with an electric motor. You can think about whether there are nine motors that need to be controlled at the same time, and that the control can be Shared. Control separately, no. I don't know what I'm talking about, but I can also ask the seller for a drive
The problem to analyze the actual situation, look at your control requirements, the machine work in stepper motor coil most energized to lock the motor shaft, shaft braking motor does not move, even if has the external force, such as hard to turn the motor shaft axis did not move if broken drive motor will move at this moment, so step motor which has no accuracy. Stepper motor drives are cheap now if you know the lower working principle of stepper motor is a stepper motor coil electricity xun sequence, and understand the microcontroller programming make a stepper motor driver circuit board so cheaper. Single chip and motor drive cost can be as low as a few yuan. There is a subdivision of the online bay, which drives 20 yuan for the power of the current, which can be bought with a dedicated drive chip. But that's a lot of knowledge.
