Hard to say if what you read is good or not, as you didnt said exactly which points you read and what tool you read it with. I think you should read the voltage across sense resistors instead of across driver outputs. And voltage across sense resistors is dropout voltage on sense resistors, hence its a very small voltage to read in the first place.
But most of all, stepper driver output is in range of tens of kHz (10k switches per second, with both +/- swings), while an usual multimeter reads with only like 3 samples per second. So, make sure multimeter is set to read on ac "MAX" function, or something like that, and try with a ton of reads, and even so, results are probably going to be sort of inconclusive, even for a "true rms" multimeter that wont "guess" exactly whats going on, coz "true rms" also "guesses" - it doesnt mean its going to read mega samples per second, but would rather try fit reads to an ideal sinusoid which just isnt there. Bottom line i think chances to actually read correct peak values with a multimeter are slim to none, that would be like one in ten thousand or less, to get the peak of one cycle coincide with the multimeter read. Ideally i think it should be read with something like a scope across a sense resistor, and that gives a good picture of whats happening to the whole waveform rather than just some samples at random intervals.
That being said, your motor at least rotates, just is missing torque, so perhaps look at torque pins, try upper settings, it may be on 20% or something.
But most of all, stepper driver output is in range of tens of kHz (10k switches per second, with both +/- swings), while an usual multimeter reads with only like 3 samples per second. So, make sure multimeter is set to read on ac "MAX" function, or something like that, and try with a ton of reads, and even so, results are probably going to be sort of inconclusive, even for a "true rms" multimeter that wont "guess" exactly whats going on, coz "true rms" also "guesses" - it doesnt mean its going to read mega samples per second, but would rather try fit reads to an ideal sinusoid which just isnt there. Bottom line i think chances to actually read correct peak values with a multimeter are slim to none, that would be like one in ten thousand or less, to get the peak of one cycle coincide with the multimeter read. Ideally i think it should be read with something like a scope across a sense resistor, and that gives a good picture of whats happening to the whole waveform rather than just some samples at random intervals.
That being said, your motor at least rotates, just is missing torque, so perhaps look at torque pins, try upper settings, it may be on 20% or something.