I was setting tool lengths today. The Z came down at it's normal brisk pace to the Tool setter. About half way thru my tools, it was crawling down, maybe 10 ipm. I notice all three axis are off. I ran the fadal test program and instead of 71 seconds I was getting 85, but either way I turn R6 adjustment it gets worst.
I also notice during the clock test, the axis will speed up for a second then slow down and is erratic. The test program over-rides the Feed Rate over-ride pot so that and it's wiring shouldn't cause that.
I suspect a bad clock board. Has anyone else seen this before I invest a bunch of money on a new card?
Richard