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Servo driver selection
- Gatesy
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10 years 10 months ago #66403
by Gatesy
Replied by Gatesy on topic Servo driver selection
Re Fanuc drives
I don't have the fanuc drives, just the actual mill which is fitted with Fanuc red tops. I have used several machines with Fanuc control (Model O) and found it ok, but so outdated even when compared to MACH3
I'd like to steer away from using old Fanuc parts. The reasons being that as it is all Fanuc specific, you have to replace with the same parts, extra axis have to be unlocked, adding in additional functions is impossible, and to repair anything needs a Fanuc engineer. The programme length is minute so CAD/CAM generated programs have to be drip fed.
If I use "off-the-shelf" parts and a modern up to date controller, especially LinuxCNC as it is always being updated, I can do pretty much what I want with the machine. And if a part fails, it can be readily replaced with if not an identical part, but something very similar.
I'm also building another machine so would need another CNC control for that at some point.
The only reason I ask about keeping the Fanuc servos is that the eusurplus wiki shows how to tune a motor, so in theory I should be able to tune the servos myself??? I have no problem removing the Fanuc encoder and fitting a standard type encoder. I was only thinking about keeping them as they are specifically for CNC machines, and I'm assuming they will be a better quality than the cheap chinese servos???
If anyone has used any of the chinese drives/servos and found them to be ok then I wouldn't have a problem using them.
I don't have the fanuc drives, just the actual mill which is fitted with Fanuc red tops. I have used several machines with Fanuc control (Model O) and found it ok, but so outdated even when compared to MACH3
I'd like to steer away from using old Fanuc parts. The reasons being that as it is all Fanuc specific, you have to replace with the same parts, extra axis have to be unlocked, adding in additional functions is impossible, and to repair anything needs a Fanuc engineer. The programme length is minute so CAD/CAM generated programs have to be drip fed.
If I use "off-the-shelf" parts and a modern up to date controller, especially LinuxCNC as it is always being updated, I can do pretty much what I want with the machine. And if a part fails, it can be readily replaced with if not an identical part, but something very similar.
I'm also building another machine so would need another CNC control for that at some point.
The only reason I ask about keeping the Fanuc servos is that the eusurplus wiki shows how to tune a motor, so in theory I should be able to tune the servos myself??? I have no problem removing the Fanuc encoder and fitting a standard type encoder. I was only thinking about keeping them as they are specifically for CNC machines, and I'm assuming they will be a better quality than the cheap chinese servos???
If anyone has used any of the chinese drives/servos and found them to be ok then I wouldn't have a problem using them.
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- Gatesy
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10 years 10 months ago #66406
by Gatesy
Replied by Gatesy on topic Servo driver selection
How well does this set up work
[url=http:/https://forum.linuxcnc.org/forum/27-driver-boards/29174-mesa-5i23-7i44-7i49-7i37-8i20][/url]
[url=http:/https://forum.linuxcnc.org/forum/27-driver-boards/29174-mesa-5i23-7i44-7i49-7i37-8i20][/url]
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- andypugh
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10 years 10 months ago #66408
by andypugh
It works well for me.
But the guy in the thread seems to be having problems.
Replied by andypugh on topic Servo driver selection
Gatesy wrote: How well does this set up work
[url=http:/https://forum.linuxcnc.org/forum/27-driver-boards/29174-mesa-5i23-7i44-7i49-7i37-8i20][/url]
It works well for me.
But the guy in the thread seems to be having problems.
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- Todd Zuercher
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10 years 10 months ago #66410
by Todd Zuercher
Replied by Todd Zuercher on topic Servo driver selection
Sorry if you miss understood me, I was not implying that you should try to revive the old Fanuc control, just re-use the servo drives and motors with Linuxcnc. However, I am not sure that is possible, and if you don't have them the point is moot, they would probably be to expecive to buy an OE replacement.
Maybe these guys can help you out.
openservodrive.com/fanuc-serial-pulse-co...t-argon-servo-drive/
Maybe these guys can help you out.
openservodrive.com/fanuc-serial-pulse-co...t-argon-servo-drive/
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- Gatesy
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10 years 10 months ago #66417
by Gatesy
Replied by Gatesy on topic Servo driver selection
I like the look of the Argon drive, but quite expensive, I can get a drive/servo from china cheaper than one Argon. But would they be as good as a Fanuc motor / Argon drive combo?
I see PICO do a lot of stuff suitable for Fanuc motors, but website does not say what mode their brushless servo amplifier works in, and if it is for AC motors?
Anyone using PICO stuff, any good?
I see PICO do a lot of stuff suitable for Fanuc motors, but website does not say what mode their brushless servo amplifier works in, and if it is for AC motors?
Anyone using PICO stuff, any good?
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10 years 10 months ago #66418
by andypugh
As far as I know there is no practical difference between an AC brushless servo and a brushless DC motor.
Replied by andypugh on topic Servo driver selection
Gatesy wrote: I see PICO do a lot of stuff suitable for Fanuc motors, but website does not say what mode their brushless servo amplifier works in, and if it is for AC motors?
As far as I know there is no practical difference between an AC brushless servo and a brushless DC motor.
Lots of people. Are your motors of a voltage and current rating that is matched to the Pico drive specs?Anyone using PICO stuff, any good?
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