Well then i’m guessing they are A4988 Drivers, usually they can only push out 1A per phase, so falling short of your motors rated 1.7A. It will still probably operate ok, as long as it prints at the speed you want without losing steps i wouldn’t worry about it. The next thing to do would be to get some DRV8825 or some TMC steppers. The DRV’s will be noisier but the TMC’s can support up to 256x microstepping so would be near silent.
Measure the amps from the pot to find out exactly how much current they are supplying. I know you can measure the volts but measuring the amps is more useful imo.
Sorry, I am mistaken. It’s difficult to see what your issue could be, I use similar “generic” drivers and about 1.7 amp steppers and can stop the motors with my fingers no worries. I would finish your printer build and see how it goes
