Howdy everyone,
We have a 20/40B mazak 1988 model which we have used since new,over the last 2 years we have had trouble with the spindle control, it has blown the w- phase transistor [ i think ive got this correct ] 3 times now.
It has had the power supply replaced with reco one, the main board replaced,
and a couple of other electronic parts, the service guy is very experienced with mazaks and says that so many of these controls give similar trouble and that identifying the exact cause is very difficult.
He suggests that we retrofit a newer control will eventually be the go, but at a cost of at least $15000 i want to be hell sure its necessary ! albeit - its cheaper than changing machine, we are a very small business so we have to be careful what we spend.
Any ideas as to what might be causing the trouble would be appreciated, if you people think a retrofit is the only way to get reliability, then i,ll do it.
Cheers