Hi Traumflug,
But what to do if you want to go beyond the constant torque zone? (Please note that torque is not even constant but higher than holding-torque for a while [www.ti.com] )
As the speed increases, the inductance effect forces the drive to stop acting as a current source and to act as voltage source (PWM stays on as desired current is not reached within the step time). Then is when it pays off to have a higher voltage power source.
Of course one idea is to always work below corner speed, but my question was trying to explore options beyond that (a speed that may or not make sense for a standard reprap depending on its mechanical design).
But what to do if you want to go beyond the constant torque zone? (Please note that torque is not even constant but higher than holding-torque for a while [www.ti.com] )
As the speed increases, the inductance effect forces the drive to stop acting as a current source and to act as voltage source (PWM stays on as desired current is not reached within the step time). Then is when it pays off to have a higher voltage power source.
Of course one idea is to always work below corner speed, but my question was trying to explore options beyond that (a speed that may or not make sense for a standard reprap depending on its mechanical design).