Best Drive for Fanuc AC servos

[m_c]

Oh.
Selling them and buying some new servos and drives is likely to be the far easier option, if you do want to change the control.

Lack of program memory on a lathe isn't that big a problem, as most lathe programmes aren't that big anyway.
But it all depends on where you want to spend time and money, between running the existing system, or fitting a new system.

I'd be seeing how much a working Fanuc system is worth, and making a decision from there.

[hanermo2]

The mesa stuff is known to drive motors/servos well.
Granite D. is actually cheap ..

Getting any of the commercial/fanuc servos running well has been an adventure, in general, for others.

It will be very cheap to try with a granite d. system, vs anything else ..
and about 3x easier, imho.

There are endless caveats, most are unlikely.
So it might be it wont work .. but this is 5-10% probability.

Using the granite d. stuff makes you 10x more likely to succeed - imho.

[Clive S]

Ross here is the link to the drives https://granitedevices.com/products/

and a page that might be able to walk you through http://www.wiki.eusurplus.com/index.php?title=Main_Page

as you know I am following this

[Ross77]

So a big plus for Granite devices then

Not sure I class £420 a drive as cheap though, Would the IONI series be powerfully enough? Modular so I could build up the system as I need it.

Thanks Clive, hadnt found that wiki but looks promising, I could even use my current mesa cards as the GD's accept step direction signals as well as 0-10v

[Ross77]

Had a look today and the motors are Type 3-OS, A06B 0533-B001#7000 and dated 90 04 so guesing April 1990

6 pole, 112v, 0.5Nm and 1 amp, google seems to indicate a 2000ppr incremental encoder.

Are they worth saving or just replace with a all new drives.

[m_c]

I'd price the different options up.

How much are a pair of drives suitable for those motors?
How much would it cost if one of those motors died (the actual motor is unlikely, but the encoder might)?

How much is a set of new servos/drives?
How much would ou get selling the Fanuc system/motors?

Personally I'd replace with new, so I've got a known quantity, and know where to get spares, but then I'm looking at things from a commercial point, where if something breaks, I want to know what's needed and where to get it, to fix it ASAP.

[Ross77]

My main aim is to keep the accuracy of the machine. I keep seeing posts that say the Fanuc set up is the best and its mad to replace with steppers.

I was also trying to keep the work load down and get it running Asap by just a rewire and not have to mess with pullies and belts.

Any idea on the value of a Fanuc OT system?

I know how much the Granite drives units are to run the Fanuc motors but there is such a variety of replacement servos and drives I have no idea what is the best option.

What nema 34 servo motors and drives would you recomend?