I have a DC motor that came with a speed controller like in the picture. The controller is connected to the motor with a 4-pin connector. Nothing is labeled except the power source which says: 24V 4.17A 100W
I want to replace the controller with a DAC for automation and need to find out which pins of the connector do what. I could just start probing with a multimeter but I dont want to short anything. I also dont want to dissasemble the controller or the motor.
I assume:
1) two pins are power from the power source which supply the controller.
2) the other two pins are the regulated power from the controller to supply the motor and adjust its speed.
My uneducated approach would be to disconnect the controller, power up the device, and test between the pins looking for 24V. Once I find that +24 I dont know where to go from there. I'll have three pins unknown. I also suppose sparks could by flying during this process, which I dont want.
My totally ignorant next step would be to find something with resistance like maybe a 24V 100W light bulb, and test between the +24 and the other three poles. My hope would be to light up the bulb without the motor running. Then I would have found #1 above - the two pins that power the controller.
So then what? Directly wire those two pins to the other remaining pins and hope the motor turns at full speed? And if it doesnt, disconnect as quickly as humanly possible while sniffing for burning smells? Then, directly wire those two pins to the other remaining two pins and surely the motor will turn at full speed, thushly accomplishing the task.
Any ideas?
I want to replace the controller with a DAC for automation and need to find out which pins of the connector do what. I could just start probing with a multimeter but I dont want to short anything. I also dont want to dissasemble the controller or the motor.
I assume:
1) two pins are power from the power source which supply the controller.
2) the other two pins are the regulated power from the controller to supply the motor and adjust its speed.
My uneducated approach would be to disconnect the controller, power up the device, and test between the pins looking for 24V. Once I find that +24 I dont know where to go from there. I'll have three pins unknown. I also suppose sparks could by flying during this process, which I dont want.
My totally ignorant next step would be to find something with resistance like maybe a 24V 100W light bulb, and test between the +24 and the other three poles. My hope would be to light up the bulb without the motor running. Then I would have found #1 above - the two pins that power the controller.
So then what? Directly wire those two pins to the other remaining pins and hope the motor turns at full speed? And if it doesnt, disconnect as quickly as humanly possible while sniffing for burning smells? Then, directly wire those two pins to the other remaining two pins and surely the motor will turn at full speed, thushly accomplishing the task.
Any ideas?
