Driver / Stepper questions?????????

Question 1, Steppers:
What are the advantages in using .9 degree steppers vs. 1.8 degree
steppers? Knowing that the .9 degree has twice the resolution, but what if
any are the downfalls with the high resolution type stepper?

Question 2, Drivers
Also, what are the trade offs with drivers that have either full or 1/2
stepping, other than the resolution?

Thanks in advance,
Russ



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