Fanuc servo drive integration

The alarm bits are just a 4 bit code(codes are listed in one of the controller manuals), This would require tri-stateable differential drivers on those PWM pins (and knowing when to change dir: DRDY?)

Yes 6-PWMs signals for 6 transistors on the 3phase bridge.
I worked on this about a year back .So If I remember right,the alarm signals are just multiplexed digital signals.No other protocal involved.

hello i am again. s700 have a Fanuc robot, buy blcd picosystem converters. I also have these drivers.
and according to my research are these,,,,,
I share all my data,
image valid for::
a06b-6058-h221
a06b-6058-h222
a06b-6058-h012
a06b-6058-h006

pwm a .....pwmf is pwm control 6 trifasic mosfets...
drdy- servo ready
mcon:mcc , activated relay power 200va in mosfets control.(voltaje power start )
ir and is,,,,,, sending to control amp power windings motor....

These Fanuc servo amplifiers require SIX PWM signals for each axis. If you have 5 motors on the robot (typical) then you would need THIRTY fast PWM channels to drive the 5 axes. Also, the top and bottom transistor of each pair must never be on at the same time, or it will likely blow the transistors. It might be better to just use 3 PWM generators with a pair of deadtime generators each to produce the 6 transistor drive signals. This would get into custom FPGA development.

Jon

Control blcd jon .picosystem.

Pwm bldc 8015a chino

This is interesting.

Did anything ever come of the previous effort to interface FANUC AC servo drives? What about FANUC AC spindle drives?

Quite a timely subject given the quality of the AC drives+servos and the obsolescence of the late 90s' early 00s' controllers.

Has anyone actually retrofitted just the controller on a red-cap based machine, and documented what was done?

.

_jC wrote:

This is interesting.

Did anything ever come of the previous effort to interface FANUC AC servo drives? What about FANUC AC spindle drives?

Quite a timely subject given the quality of the AC drives+servos and the obsolescence of the late 90s' early 00s' controllers.

Has anyone actually retrofitted just the controller on a red-cap based machine, and documented what was done?

.

I have converters for both the first-generation Fanuc encoders and the later serial pulse coders. These give you standard quadrature plus index encoder output plus commutation signals. These could be used with a variety of well-known brand servo amplifiers such as Servo Dynamics, AMC and Copley.

I also have servo amps and controller for LinuxCNC that can be used with Fanuc motors. They go up to 150 V and 20 A peak. So, they are quite good for smaller Fanuc motors, but not really beefy enough for the largest motors.

Jon