I have a 1997 VM17 with a Centurion 6 controller. I haven't used it for a long time as I moved house and now I have set it up (and renewed some parts to get it working) it has a problem (which is a problem I actually noticed just before I moved but I did nothing about at the time as life got in the way). Most things seem to work properly (homes properly, jogging each axis works etc) but the spindle won't go over about 630 rpm. If it is set at 600 it spins at around 600 but at any speed above that the display shows the right setting (S1000 or S2000 or whatever its set at) but the display then shows it is actually doing about 630 rpm and I can see it is in fact doing about 630 rpm. If I adjust the spindle % knob it has the same effect as changing the "S" setting. That is, if I set it at S2000 it goes 630 with the % at 100%. If I adjust it to 20% I get 400 rpm, if I move it to 30% I get 600 rpm but if I set it at 70% or above I always get about 630 rpm.
It amkes no difference whether or not I have a tool in the spindle and I have tried a number of things including reloading parameters but have had no luck.
I have searched the site (and the net) but, unlike every other problem I've ever had, I can't find any threads where anyone else has had this problem. Has anybody had a similar problem or have any suggestions?
Thanks in advance.