macgyver
Stainless
- Joined
- Aug 2, 2012
- Location
- Pittsburg, KS
Hey guys I have an old Komo cnc router with a Fanuc OM control. It has multiple spindles and last Friday one quit. I am trying to diagnose which part(s) failed in between jobs so it is going slow.
The spindle that quit is a 7.5 hp Colombo with ER25 collet. It is an 18,000 rpm spindle/motor. The drive that runs it is an AC Tech that puts out 300Hz to get it to 18K.
So, my lack of understanding falls on the drive. I am assuming that it is a vfd, if so, are they more or less all the same? I have never messed with one directly at all, so don't know much. I have seen in other applications, say a manual lathe or drill press you can manually push the up/down buttons to change rpm. I don't know how the drive works in auto mode so that the Fanuc dictates the rpm. As in, any idea as to how the Fanuc and AC Tech talk to each other? If my drive is bad, could I put in an off the shelf vfd of proper hp rating or do I need a special spindle drive?
I haven't found the manual for this one, I have the manual for the 12hp drives which are a different brand.
I am guessing some of my issues are improper use of terminology on my part and others I have talked to over the years...
Thanks for any help,
Jason
The spindle that quit is a 7.5 hp Colombo with ER25 collet. It is an 18,000 rpm spindle/motor. The drive that runs it is an AC Tech that puts out 300Hz to get it to 18K.
So, my lack of understanding falls on the drive. I am assuming that it is a vfd, if so, are they more or less all the same? I have never messed with one directly at all, so don't know much. I have seen in other applications, say a manual lathe or drill press you can manually push the up/down buttons to change rpm. I don't know how the drive works in auto mode so that the Fanuc dictates the rpm. As in, any idea as to how the Fanuc and AC Tech talk to each other? If my drive is bad, could I put in an off the shelf vfd of proper hp rating or do I need a special spindle drive?
I haven't found the manual for this one, I have the manual for the 12hp drives which are a different brand.
I am guessing some of my issues are improper use of terminology on my part and others I have talked to over the years...
Thanks for any help,
Jason