Because of other interest in CNC machines, a small update on my Deckel FP2-NC milling machine adventure. Some good and some ugly news.
Good: Machine arrived in good shape (big truck with little machine on it
) and I got the electronics fixed, had to replace a blown transistor on the NPP90 board, initially suspected bad EPROMs, but was a visible blown transistor in the end.
Bad news: Some nasty galling/fretting/cold welding on the X-slide, wear/bad adjustment in the X-axis ballscrew trust bearings and a crapped out hydraulics pump. The galled X-ways are certainly the worst, not sure what to do about it, I'll probably ask the guys at practicalmachinist for advice (have a thread going there, too). Just in case anyone else buys such a machine, please inspect the X and Z ways before buying. Bellows on the X-axis are simply snapped on (same mechanism as in snap fasteners), so they are easy to pry off with a screwdriver for inspection.
I think the monkey operator splashed coolant behind the table, which flushed the lubrication and and started corrosion on the ways. Add some chips and the lack of lubrication and you get nasty galling like that.
Thrust bearings are easy to inspect by placing a dial indicator on the spindle face and moving the axis side to side. (you need an indicator with a long tip, couldn't fit my 1/1000mm indicator in the hole). X-thrust bearing has 4/100mm play/wear in my case.
Vertical spindle also suffered from monkey operator which made a million small dings while changing tools (and crashed it at least once, judging from the galling/cold welding ring at the edge). Found an hour counter in the top of the electrical cabinet a few days ago, 12000h only. So the monkey operators did quite some mayhem during that time, I've seen some machines with much more hours that were in better condition
.