This morning I powered up my 770 to cut some flutes in a couple of reamers I've been working on.
Shortly after powering up I heard a sharp squeal coming from the area of the cooling fan. I thought maybe the
bearings in that little fan had just taken a crap on me.
It stop squealing as quickly as it had begun and everything appeared to work normally after that.
As I proceeded to index my part on the 4th-Axis, I noticed that the on-screen jog button (to switch from "Continuous" to "Steps")
wouldn't work. The little yellow light worked when I switched from one setting to the other but, the table wouldn't move in either setting.
I had to press the "Reset" button to get the table to move again.
I generally use the the on-screen Job-Button and Arrow-Keys to help me index my part and zero my Axis'. I can do it without using the Jog-Button but it's frustrating to find that something may be wrong somewhere in the electronics where I know the least about trouble-shooting. I've owned it over a year so I don't think it's still under warranty.
After I'd done all the milling I was going to do I re-checked the on-screen Jog-Button. It appeared to be working again; in both settings.
When I was done milling the flutes I shut down the mill and checked all the electrical wiring for any tell-tale burn marks or anything out of the ordinary. I didn't smell anything burning that would indicate a short or arching of any kind.
Can one of you guys give me a clue where to start looking for anything that might induce such an event? It will be at least another week till I'll need to use my mill again. I thought in the mean time I could do a little research on the possible causes of a malfunctioning Jog-Button.
Any help you can give me will be appreciated.
MetalShavings