The machine was running fine, until I got an ol2 error on the vfd. Now the spindle wont start to spin on its own, unless I spin it by hand to get it started. It makes noise like it is spinning up the motor but the spindle does not turn, then it throws the ol2 error. If I remove the spindle from the mount and just lay it on the table it spins up without the error. Wondering if there is an exploded diagram of the spindle available. Also wondering if there is a clutch or shear pin in the spindle. I have many years of maintenance behind me so tearing it apart shouldn't be a problem......but would be easier to diagnose if I had an exploded view.
What is the temp where the machine is at? I have heard that if it's cold, it is always a good idea to spin it by hand and then run the spindle at low rmp's to let it warm up. It has something to do with the type of grease that is in the bearings. I also know that there is no mention anywhere in the manual about this.
I may have discovered the trouble....the cooling system was very low on coolant, from the factory. I filled it with distilled water and am going to flush the lines because of growth in the cooling system. then refill with RV antifreeze.
I had an issue I wanted to share as it sounds like it showed somewhat similar symptoms. Probably different but I thought I'd share in case it happens to someone else.
My brand new machine would not turn the spindle on. It sounded like it started revving up but, instead of turning, the spindle 'locked up' to where you could not turn it but hand. As soon as I stopped it with the controller it would spin freely (rotating it by hand) again....
Here is what my issue was: The connector for the spindle (inside the left cover) had come apart just enough to produce this weird symptom. Plugged it in and every has been fine since.
I had an "OL2" error only once, and that was when I had a flycutter touching the table (at z0) and I ran the Mill Plane program from the controller. Spoiler alert!: it starts the spindle IMMEDIATELY, without any type of warning!!!! Because the flycutter was touching the spoilboard, it (the spindle) couldn't turn freely (that's my theory, anyway) and protected itself, and threw out the OL2 error. It took me quite a while to notice why the spindle wasn't spinning (I had visions of hundreds or thousands of dollars of damage, caused by my error). Then I saw the error, powered off the system, and after a re-boot, it worked perfect.
Post by Axiom Tool Group on Mar 22, 2018 9:18:47 GMT -5
The OL2 (Over-load) error usually is the result of plunging the bit too deeply, either accidentally or by cutting too aggressively and over loading the motor.
Generally restarting the machine completely will clear it...however an overload can also result in a blown fuse. If the fuse is blown on one the legs, then the spindle may not be getting proper power and would have trouble rotating.