Need info on Fanuc brushless motor
I have a Fanuc A06B-0512-B504 red cap brushless motor (new) manufactured in 1999 that I would like to use on my cnc mill to replace a brush motor. Does anyone have the pinout of the 17 pin connector on this series motor? I am starting to think that perhaps it does not have hall sensors, but just the pulse coder output. I was under the impression that all drives need hall sensors at least on startup to get the commutation right. Is this true? I took the outer red cap off and the pulse coder is A860-0315-T101 2000P. All the wires in the 17 pin connector go to the pulse coder...no evidence of halls coming from the rest of the motor.
ideas?
Re: Need info on Fanuc brushless motor
Oh thank you thank you for the pinout info!
re: Fanuc AC motors (more data)
Ok, so using those pinouts (thanks again!) I probed Bit 1, Bit 2, Bit 4 and Bit 8 using my oscilloscope and hand rotating the motor shaft.
It appears Bit1 pulses 16 times per revolution, Bit2 8 times per revolution, Bit4 and Bit8 both pulse 4 times per revolution, 90 degrees out of phase with each other.
weird!
I was more expecting Bit1 to do 8 times, Bit 2 to do 4 times, Bit4 to do 2 times and Bit 1 to change once per rev. Or at least 16,8,4 and 2.
But anyway, I can work with what I get. I am going to feed these 4 signals into a little cpld test board I have and generate 3 hall type signals that I will use with a AMC BE15A8E-H brushless amplifier. This particular amp has selectable 120 degree or 60 degree phasing. The fanuc motor is 8 pole. Hmmm, I need to find some info to determine what my hall signals should look like with respec to this motor and drive...
I will post success or failure stories :-)