I am in the earliest stages of building a 4 axis CNC router. I have acquired a raft of HP LaserJet stepper motors and intend to either use these or, finding them insufficient, at least using them to prototype the router and changing them out for more powerful motors later.
The problem is that, after reading vast amounts of information regarding stepper motors, on the internet, Im finding little-to-no correlation between what Ive read and these motors. For example, in seems as if stepper motors have 4, 5, 6, or 8 wires. The ones I have have 7, 8, or 9 wires. The ones I read about have color coded wires, mine have a single color for all wires. The ones I see on the I/N have the wires connected directly to the motor, mine have the motor soldered to PCBs and the wires coming off of them to another (driver?) PCB.
Ive tried various tests with a VOM and by shorting the wires to one another but do not get the results described in my readings on the I/N. I assume the circuitry on the PCBs may be hampering the results.
Ive searched the I/N using the brand and model information off the motors to see if I could find some schematics. All I found was offers to sell me more motors.
The motors do have markings on the PCBs that might help the informed out there, but they do not correlate to the terms used on the I/N regarding stepper motors. For example, the I/N discussions reference the A+, A-, B+, and B- windings, the PCB for the motor labeled RH7-1331, DNQ15A01L18A has the following markings: GND, GND, MON, 24V, 24V, MRDY, and HALF; the PCB for the motor labeled Nidec RK2-0275-02, 50M0603020, has following markings, Vcc, Vcc, /FGS, /DEC, /ACC, GND, GND, NC; and PCB for the motor labeled Nidec RK2-0273-02, 50M0603010, has following markings, Vdd, Vdd, Vdd, FG, /DEC, /ACC, GND, GND, GND, NC. Now, just to show Im not a blithering idiot, I DO realize that 24V means 24 volts and that GND means ground and NC means no connection and I assume that /DEC and /ACC mean decelerate and accelerate, respectively. Also, Ive been told the Vcc and Vdd have to do with voltage input so, again, I assume these would correspond to the rated voltages (24V in all cases) of the motors. However, none of this correlates to what Ive read about stepper motors, or, at least, I do not see the correlation.
If someone could show me how I can connect these to a commercial, low-cost stepper motor driver or to an Arduino or Arduino driving a stepper driver that will allow me to control them through a PC using CNC software, Id greatly appreciate it.
I can provide pictures of the motors on other associated PCBs on request.
The problem is that, after reading vast amounts of information regarding stepper motors, on the internet, Im finding little-to-no correlation between what Ive read and these motors. For example, in seems as if stepper motors have 4, 5, 6, or 8 wires. The ones I have have 7, 8, or 9 wires. The ones I read about have color coded wires, mine have a single color for all wires. The ones I see on the I/N have the wires connected directly to the motor, mine have the motor soldered to PCBs and the wires coming off of them to another (driver?) PCB.
Ive tried various tests with a VOM and by shorting the wires to one another but do not get the results described in my readings on the I/N. I assume the circuitry on the PCBs may be hampering the results.
Ive searched the I/N using the brand and model information off the motors to see if I could find some schematics. All I found was offers to sell me more motors.
The motors do have markings on the PCBs that might help the informed out there, but they do not correlate to the terms used on the I/N regarding stepper motors. For example, the I/N discussions reference the A+, A-, B+, and B- windings, the PCB for the motor labeled RH7-1331, DNQ15A01L18A has the following markings: GND, GND, MON, 24V, 24V, MRDY, and HALF; the PCB for the motor labeled Nidec RK2-0275-02, 50M0603020, has following markings, Vcc, Vcc, /FGS, /DEC, /ACC, GND, GND, NC; and PCB for the motor labeled Nidec RK2-0273-02, 50M0603010, has following markings, Vdd, Vdd, Vdd, FG, /DEC, /ACC, GND, GND, GND, NC. Now, just to show Im not a blithering idiot, I DO realize that 24V means 24 volts and that GND means ground and NC means no connection and I assume that /DEC and /ACC mean decelerate and accelerate, respectively. Also, Ive been told the Vcc and Vdd have to do with voltage input so, again, I assume these would correspond to the rated voltages (24V in all cases) of the motors. However, none of this correlates to what Ive read about stepper motors, or, at least, I do not see the correlation.
If someone could show me how I can connect these to a commercial, low-cost stepper motor driver or to an Arduino or Arduino driving a stepper driver that will allow me to control them through a PC using CNC software, Id greatly appreciate it.
I can provide pictures of the motors on other associated PCBs on request.