Thank you for the reply, the Y steppers are in fact in series (I got it wrong), the Z steppers that are in parallel (they work fine enough without micro stepping)
As for specs they are NEMA 17 1.8 degrees, 5Kg/cm, 1.5A. The original stepper drivers are Pololu A4988, I tried voltages +/-30% what worked originally (I don't know the calculation, but that worked for X and extruder). Hence the only thing that differentiates Y is that there are two motors. Will try reducing the micro stepping once I find how to combine the jumpers.
As for specs they are NEMA 17 1.8 degrees, 5Kg/cm, 1.5A. The original stepper drivers are Pololu A4988, I tried voltages +/-30% what worked originally (I don't know the calculation, but that worked for X and extruder). Hence the only thing that differentiates Y is that there are two motors. Will try reducing the micro stepping once I find how to combine the jumpers.