Re: Fanuc 3000C
An ambitious project. The wiring diagram will be helpful.
I did a similar retrofit on my Fanuc equipped lathe. The first thing you need to do is identify all of the inputs to the computer from limit switches and other sensors. I literally traced each cable back to each switch/sensor and created a map of the connections. Then identify all of the outputs from the computer to the various devices like relays, contactors, ect. If you are going to replace motors & drives, then don't worry about connections to the existing drives, these are going to be removed anyway. Then decide on what hardware you can use in the retrofit. My lathe retrofit was about US$7,500 by the time I was done with it.
I understand it might be possible to control the Fanuc drives with a non-Fanuc controller, but I gave up and ripped everything out that said Fanuc on it and replaced it with modern hardware.
For your axis motors/drives take a look at DMM Tech, their 1.8KW motors should be adequate. https://store.dmm-tech.com/products/...ac-servo-motor. They have a 28.7 Nm peak torque. You may not be able to have the acceleration of the original Fanuc motors, but it will move the head just fine. They move my 2000 lb lathe carriage at frightening speeds and acceleration.
You may be able to use the original DC drive for the spindle, I think those are controlled by a standard +/- 10V analog signal. You'll have to check the manual when you get it. There are modern DC servo drives available that will run the Fanuc DC spindle, you'll need the information from the motor data tag to spec that out. I can't find any specs for that motor.
Then you need to decide on what controller/software that you want that is compatible with the hardware. Then you get to sit down and draw a complete schematic for the machine and start wiring it up.
Jim Dawson
Sandy, Oregon, USA