Arduino Nano Every with headers (ABX00033) ELC4020 If this is an issue

If this is an issue with your part

The maximum step number of DM556D is 51200 steps/rev (microstep is 1/256 )

which improve the stability of the communication

"-90" (~1ms pulse) is all the way to the left

AVR Studio or WINAVR(GCC) is used as front-end software

Arduino Nano Every with headers (ABX00033) ELC4020 If this is an issueARDUINO NANO EVERY WITH HEADERS The Nano Every is Arduinos 5V compatible board in the smallest available form factor: 45x18mm The Arduino Nano is the preferred board for many projects requiring a small and easy to use microcontroller board. The small footprint and low price, make the Nano Every particularly suited for wearable inventions, low cost robotics, electronic musical instruments, and general use to control smaller parts of a larger projects.