A4988 Drivers
Vref set to ~90% of stepper rated current
Rs = 0.1ohm
X = 0,58v (0,725A)
Y = 0,58v (0,725A)
Z = 0,58v (0,725A)
E = 0,72v (0,900A)
Naming: [JK][S]HS[L]-[100][4]
JK: Manufacturer (jkongmotor) S: Size (42mm) HS: Hybrid Stepper L: Length (34/40mm) 100: Rated current 1.00 4: Number of wires
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X, Y, Z: 42x34 1.8deg 0.84A 4xwires jk42hs34-0844 yal8-23
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E: 42x40 1.8deg 1.0A 4xwires jk42hs40-1004a-02f
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http://www.jkongmotor.com/Product/42HS-NEMA17-2Phase-Stepper-Motor-1-8%C2%B0.html
This was very useful. Thank you!
I'm quite sure that the Ender-2 uses the same motors and A4988 drivers (no label on the motors).
Detailed data on the motors:
https://ecksteinimg.de/Datasheet/Schrittmotor/JK42HS34-0844A/JK42HS34-0844YA-01.pdf
https://ecksteinimg.de/Datasheet/Schrittmotor/JK42HS40-1004A/JK42HS40-1004AC.pdf
The very last part of the codes is not the same but it doesn't matter.