Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Re the post #8, re buzzing contactors, I went over a long time ago to 24vdc for not only control but all relay and contactor coils, the only time AC has the edge is at switch on time, after that, DC has the advantage.!
The Old work horse Fanuc was a nice control, but expensive to maintain, I had a career of retrofitting and went with Fanuc initially, but they were too hard and expensive to work with. Ended up with Mitsubishi.
For the Galil based systems, I did make my own HMI screens from kiosk style, touch screen Displays, many with the PC mounted behind them or used a panel mount touch screen and a Advantech PC on a card that fits in a slot.
One manuf. that makes nice panel mount PC's is Maple Sytems.
I also used industrial membrane covered keyboards that were impervious to oil, water etc.
You most likely can sell the Fanuc on ebay to cover some costs.
Al.
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Quote:
You most likely can sell the Fanuc on ebay to cover some costs.
There is no possibility we use old fanuc ac servo motors with non fanuc drivers ?.
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Quote:
Originally Posted by
asuratman
There is no possibility we use old fanuc ac servo motors with non fanuc drivers ?.
The problem with Fanuc AC servo's is they use a proprietary method for commutation, I have removed the encoder and fitted a through shaft version replacing the encoder with one that has BLDC commutation tracks and can be used on AMC drives and others.
There was also a poster here that came up with a board for sale to convert the existing commutation encoders.
Al.
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Al,
Thanks for reply, I just want to make sure that is almost impossible to control ac fanuc servo motor with a non fanuc board.
1 Attachment(s)
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
This shows the 4 bit output from the Fanuc commutation.and how it is interpolated.
Al
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Yes, it is possible to reuse most older model Fanuc Servo motors and drives and some newer models.
We have done this hundreds of times since the early 80s. We can also provide the wiring charts once we know the model number.
These are proprietary and not all models can be done but we have been gathering this information and experience for many years , over thousands of retrofits. We agree that there are many issues trying to use old Fanuc servo motors with non Fanuc drives. We have replaced many systems over the years where people have tried to use non Fanuc amp drives on Fanuc motors. Either replace both the motor and the drive together or else find out if you have a compatible model that we can use and keep both the Fanuc servo motors and Amp drives.
If you have a good electrical mechanical person or have not done this before we will guide them otherwise we have over 100 dealers/installers in North America these days and around the world that can come on site and show you.
There are three basic types of communication signals. We need to know the 12 digit Fanuc part number that begins with A06B.
Doing this saves quite a bit of labor and money. No need to get into the high-voltage wiring side of the machine. Basically this is redirecting low-voltage signal wires over to a terminal strip that we provide. We will prepare the wiring documentation on where the connections go to. There is no extra cost for this.
Tech Support
CamSoft Corp.
[email protected]
PH 951-674-8100
Fax 951-674-3110
CNC Controller, PC Based CNC Controls
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Quote:
Originally Posted by
camsoft
We have done this hundreds of times since the early 80s. We can also provide the wiring charts once we know the model number.
Of course it was easy in the early 60's and even later, from the days of the old 6M and many that followed etc, these were all DC Brushed motors, the poster was referring to the AC servo which was not around then.
I commend you on integrating the 4 bit commutation encoder on the AC servo's.Did you retain them as AC or BLDC servo's?
I just used a simple through hole encoder with commutation tracks from Renco to replace the Fanuc version, the cost was quite reasonable.
Al.
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
We have done both the red end cap Fanuc AC brushless servos as well as their DC permanent magnet brushed servos. Many of the AC models have "pulse encoders". If so we have retained them. Otherwise some of the newer Fanuc encoders with 4 bit coding we just replaced and on others this wasn't even possible. It's on a case by case base.
Tech Support
CamSoft Corp.
[email protected]
PH 951-674-8100
Fax 951-674-3110
CNC Controller, PC Based CNC Controls
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Quote:
Originally Posted by
camsoft
Many of the AC models have "pulse encoders". If so we have retained them. Otherwise some of the newer Fanuc encoders with 4 bit coding we just replaced and on others this wasn't even possible. It's on a case by case base.
Tech Support
CamSoft Corp.
]
All of the Fanuc AC servo's I have serviced over the (many) years had quadrature encoders with 4 bit commutation tracks.
The one concern I had was by retaining the Fanuc AC drives, I did not want to be held hostage to Fanuc spares and pricing.
Fitting the Renco encoder and using the simple A-M-C, Copley Controls or Aerotech drives eliminated this and also facilitated the simple ±10vdc command from Galil.
Not a really high cost replacement.
Al.
1 Attachment(s)
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
Here's the result of my high speed spindle test
I am looking for a spindle encoder that will do 9000 RPM, need differential output. Any suggestions on best offer?
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
You may be better off to use a through-hole encoder rather than a shaft type. (no bearings).
Al.
Re: Vectrac CNC Knee mill refit from Fanuc 0M to Camsoft
So, I take it that the shaft has broken? Seems like 9k should not be too much for a quality encoder. My bet is that you just got a bad one that is made of chinesium. Try a different manufacturer. Or just get one with a larger diameter shaft.
https://www.automationdirect.com/adc...otary_encoders