You probably run at 90% of 70% of the motors rating. The rating is for 2 coils on and 80C temperature rise. The Allegro datasheet current calculation for Vref is the one coil on value. The two coil value is 70% of that. So if you run a "1A" motor at "0.9A" you get 63% of the torque and 40% of the 80C temperature rise, I.e. about 32C making it just about comfortable to touch.
NEMA17s give more torque per amp but they are limited by the drivers. I worked out I can get about half the torque with a NEMA14 by running it hot.
People that use 2.5A NEMA17s get less torque than the recommended 1.7A motors. They do run cooler though. Not really an advantage unless you use PLA brackets.
NEMA17s give more torque per amp but they are limited by the drivers. I worked out I can get about half the torque with a NEMA14 by running it hot.
People that use 2.5A NEMA17s get less torque than the recommended 1.7A motors. They do run cooler though. Not really an advantage unless you use PLA brackets.