Hi TomGeorge,
I purchase the A, so without the controler because my company aim is to create a low tech process.
We think it's cheaper to buy the pump and to use it with arduino and driver shield.
Hi,
Okay, but having to add an external drive module is going back to hi-tech.
If you are looking for 24/7 operation and reliability the built in drive would be my choice.
The built in controller is purpose built and would make your project so much easier to design, especially if you want to go to product manufacture.
Tom... 
Yeah .... certainly.
But I'm not an expert in my field, so It's still difficult for me to read the datasheet and to understand how the PCB works.
So ... I took the choice to bought it whithout it, and to buy extern driver. There are more tutorials on the web for it, which is not the case for the use of some PCB created by companies.
But I'm probably wrong of couse, in my post I'm a junior, I don't have a large experience of the subject (So that's why I still look tutorials).
Sorry, I saw too late that you were using a different driver board. I don't know that one, and I don't know if it already has a suitable buffer capacitor on it.
But TB6500 and TB6560 are very different!
And TB6560 seems to uses full(100%) current in full step mode. So be aware of 16W if you use fullstep. Use microstepping or set the current to a lower value.
If the motor is rated at 1A, then full step mode should be using 0.7A in each winding.
You'll see this is the case for DRV8825, A4988 etc etc, which use fullstep mode for x1
microstepping using 70% drive to both windings.
Putting 1A to each winding in a 1A motor will probably cook it.
Hi,
I really need to look at the different modes of control ... To my mind, I only had to buy a driver which can control a large number of amps greater than the motor phase current, limit the current on the driver chip and supply it with a high voltage, then use PWM to control the speed of the motor.
It seems simple at first but it requires a lot of knowledge to choose the right material and use it well ... 
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