Accepting the fact that different driver board chipsets absorb different amounts of power, why would a stepper motor only take two thirds it's rated current under full load. I'm having a little trouble understanding that.
It was my understanding that if there was not enough current available to power the motor to it's maximum current rating, then the motor would not be able to develop it's maximum torque and possibly start to loose steps as a result.
The driver chipset of my design is an L297 L298 pairing, with the L298 section of the driver board doubled up to provide a constant current capability of 4A @ 100% duty cycle. Which would leave me with pleanty of leeway with regard to power output. |