Best Drive for Fanuc AC servos

[m_c]

I can understand keeping things simple.

I have no idea about Fanuc values, but I know there are people who buy machines just to get the control, then scrap the machine.

Nema34 is 69.58 square distance between mounting holes, and 86 overall square.
Those servos are not actually that powerful. 112V and 1A puts them at 120W continuous (there will likely be an instantaneous rating 2-3x this).

Kinco from Zapp, you could go for SMH60 400W servos which are £264 along with a CD422 drive at £240 makes it £504 per axis (those prices are including VAT).
If you go for a Chinese option, 200W servo and drive combos can be had $264 per set (https://www.aliexpress.com/item/New-...760383887.html) or 400W for a similar price (https://www.aliexpress.com/store/pro...760376015.html with an 80 frame motor, or https://www.aliexpress.com/store/pro...760394727.html with 60 frame motor)

Or I've just remembered CNCdrive do servos and drives. They do AC servos in 156 and 400W versions at €156 and €198 respectively, although I can't find their corresponding drive in their web shop. They also do DC brushed servos, but I'd personally pay the extra for AC servos.

[Ross77]

I had a dig around today and found the kolmorgen Goldline XT servo motors on another project and they are nema 34. If they work then they would get me started and maybe replace later.

That said Granite devices sell motors so If the Fanucs did pack up.

Are the ones from Ali express good quality?

[m_c]

I just had a search and the Goldline XT are shown as discontinued.

The Granite drives do look quite versatile, so using another motor shouldn't be too much of a problem.

DaveK used the Chinese drives on his Bridgeport conversion, and I'm pretty sure Jazz has used them.

[battwell]

I'm going to use Allen Bradley drives for my triac with fanuc reds
I've bought a few for around £100
I've been testing them with various motors up to 3kw off single phase and step/ direction. They are very versatile when you work out how to set them up!
I know fanuc use strange comutation but these can commutate without halls etc.
Probably the most versatile drives I've ever tested.

[battwell]

https://youtu.be/_N2Pkc51-t8