steppers novato

[neo_itachi]

Hola, quisiera saber si me pueden aayudar con un stepper, no se cuales son la especificaciones para una fuente del
siguiente stepper 90HS78DE062D la conexion es en serie solo se que necesita una capacidad de 12A

[Tweakie.CNC]

Hi,

Does this help ?  http://www.modelshopcnc.com/index_files/pdf/RS34-960.pdf

Tweakie.

[neo_itachi]

thanks Tweakie.CNC.
i have that diagram but im confused.
can you help me i dont know what kind of power supply i need for the steppers  .
i have 2 steppers 90HS78DE062D and the driver is on this page http://www.dtllc.com/files/4XCNC10C3.pdf
thanks beforhand.

[Tweakie.CNC]

According to your diagram - you will only have two coils per motor energized at any one time. As each coil is rated at 3.5 Amps max then for 2 stepper motors the power supply needs to be able to supply (4 x 3.5) 14 Amps. (The most common stepper voltage used for small machines seems to be 24 Volts). The formula for calculating the series resistance is given in the driver spec.

Also, as it says in the driver spec, at this current the board is going to get hot so forced air cooling may be necessary.

Tweakie.

[neo_itachi]

other thing the voltage of the steppers is 4.3V if is that voltage ican use a
power supply of 5V the current is not problem i understand is 14A.

[Tweakie.CNC]

OK if you are going to run your steppers at 5 Volts then no series resistors are necessary.
The power supply needs to be 5 Volt at 14 Amps (15 Amps is the standard rating).

Tweakie.

[Tweakie.CNC]

Some additional thoughts here.

If your motors get hot during operation (too hot to comfortably keep your hand on) then you will need to fit series resistors to limit the current through the coils but as said earlier I doubt they will be necessary.

Tweakie.

[neo_itachi]

thanks for your help.