Hi,
I need recommendations for PWM motor controller for this motor https://docs.google.com/viewer?url=http%3A%2F%2Fwww.robokits.co.in%2Fdocumentation%2FRMCS225x_DCServo_Driver.pdf
FRM225x Motor
The spec sheet is very confusing. It shows wiring diagrams that do not appear to match the wire harness. Such as ENA. They also imply that the Vcc line can be 15V and 7A but show connections for milliamp opto isolators. Perhaps you should address your questions to their tech support.
They imply compatibility with stepper motor connections. This would be Vcc at motor power levels and controls at microprocessor pin levels.
I understand there is some
I understand there is some confusing between the diagrams and the wires harmess like you mentioned - In the wires description it says to connect the GRD and V- to the battery (12 volts and 10A) and in the diagram to the controller (up to 7 volts).
I addressed their technical support for more clarifications
Meanwhile I would like just to test to see whether the motor is moving. Maybe I can test it with 6 volts battery, Can I do that? How?
Thanks for your replay
Testing motor
My best guess is apply +6V to V+, GND to V-, set DIR high or LOW, assert ENA (How???), and continuous pulse PUL (which I think stands for Pulse). If you have a adjustable current limitting power supply I would start at a low setting. This a just a guess. The time between PLU pulses probably determines speed.
This is approximately the 100th day of the year and my mistake count is already much higher.
This is the answer a got
This is the answer a got from the tech support -
“The VCC and GND are for power and its ratings are 15V and 7amps. You can use 12V and 10A there.
The pulse and direction differential inputs are optically isolated and required pulse and direction voltages between 4V to 7V. This are the signals from the arduino board.
ENA is for enable which is not present in this model”
From what I understand from this is that terminal 1 and 6 (GND and V+) are isolated and can get 12V and 10A from the power supply and that the other terminals should be connected and controlled by the board…
Do I understand this correctly? Can you please recommend me of few motor controllers that compatible with this motor spec? (I may need to use up to 4 motors like this one, do I need 4 motor controllers or there are motor controllers that support more than one motor)?
Thanks for being with me on this 
Motor controller
I don’t think you need a motor controller unless you want to remove power to the motor. Sounds like you need to supply 5V @ 5ma to the opto isloators. One of their wiring diagrams has series resistor to +5V and logic (CPU) drives to ground to activate. I would tie the GND’s from power and logic together.
Now I understand I don’t
Now I understand I don’t need motor controller just a Arduino board.
Does the clock speed should be a consideration when choosing the right Arduino board?
It says the motor step frequency is 100 khz most (if not all) the Arduino boards are much slower (like 16 khz), Does it matter?
CPU Speed
Most 5V Arduino’s CPU clocks are at 16MHz, some 3.3V are at 8MHz. MHz is 1000 X KHz. There are at least 50 ways to organize your code to output a pulse at a specified frequency.
You right. My mistake. The
You right. My mistake. The Arduino clock’ speed is 16MHz and not 16 KHz.
I ordered Arduino board few minutes ago.
Thanks so much for your helping me understand this.
I want to test the motor
I want to test the motor and I prefer not to wait for the Arduino board.
Attach image that shows how I connected the motor to two power supplies –
1. 12v 10 amp – Motor Black to V(-) and Motor Green to V(+)
2. 4*1.5v batteries pack - Black \ V(-) and Red V(+)
1. Black 6V(-) batteries pack connect to (Brown=Blue=DIR(-)) connect to (Red=Dir(+)) connect to Red 6V(+) batteries pack.
2. Black 6V(-) batteries pack connect to (White=Orange=PUL(-)) connect to (Yellow=PUL(+)) connect to Red 6v(+) batteries pack.
Is this should work? Did I understood the wire schema correctly?
Thanks Shaul
