l have old stepper from fax machine,

l have old stepper from fax machine, its easy to make it move 48 step/rev 0,504 A, but l really not understand with my other nema17 lm opened that stepper and this nema is hybrid with 50 theet on first magnet 4 layers, its mean l have 100 holding magnet if lm turning it manualy, so from other video l have learn this stepper have 200 steps/rev, l dont have datasheet for this stepper since my seller going crasy XD, lm only have 42H047H-0504-003 code from this stepper

So lm asuming this stepper have 0,504A but after change steps/rev and same current voltage,the stepper won’t turn only fibration its confusing me, becose my old stepper have same current voltage.

Anyone can help me?

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l m use 12V 4A, and when try on 18V 4A stepper is geting hot, not really