Good day all.
I’m in the process of building a CNC but there are some things I’m unsure about and would like to ask for some assistance.
I purchased 3 x DRV8825 stepper drivers and got my code working and tested the system with old Nema 17 steppers obtained from old floppy drives. The problem is, these motors are quite weak and I would like to get stronger, more suitable steppers in my final build.
There are 2 or 3 stepper motors that I have in mind, but I do not know which one will perform the best in terms of accuracy and performance. Essentially I would like to make PCB’s with the CNC, as well as ordinary cut outs such as wood and aluminum. So it requires good accuracy.
Which would be best between the motors below? (Using the DRV8825 driver)
NEMA 17 http://www.hobbytronics.co.za/p/576/nema-17-stepper-motor
specs: 4.8kg/cm - 0.9 degree, 4 leads
Step Angle (degrees): 0.9
Motor Length (mm): 48
Rated Voltage (V): 2.4
Rated Current (A): 2.4
Phase Resistance (Ohms): 1.0
Phase inductance (mH): 1.8
Holding Torque (g/cm): 4800
Wires: 4
Rotor Inertia(g/cm3): 68
Detent Torque (g/cm): 260
Weight (kg): 0.36
NEMA 23 http://www.hobbytronics.co.za/p/578/nema-23-stepper-motor
specs: 56mm 9kg/cm - 1.8 degree, 6 leads
Step Angle (degrees): 1.8
Motor Length (mm): 56
Rated Voltage (V): 3.6
Rated Current (A): 2
Phase Resistance (Ohms): 1.8
Phase inductance (mH): 2.5
Holding Torque (kg/cm): 9
Wires: 6
Rotor Inertia(g/cm3): 300
Detent Torque (g/cm): 400
Weight (kg): 0.7
Will a 6 wire stepper have good accuracy with the DRV8825 driver?
Should I be looking at other steppers rather?
Also, would a 24V supply be enough? Or is that too high?
I’m somewhat confused with stepper motor selection after reading various forums and will greatly appreciate some advice in selecting the best option for a stepper motor). I actually have so many questions, but will stick to the basics for now
Thank you in advance.
Kind Regards
Q