Yes I have read thru the threads, tried a few suggestions and seems the problem is getting worse.

The machine is a "C", replaced sensor board last year, and it has 144 hrs of up time...

When I put a 1x6 in for a small project it goes thru all the usual, load this, measure than, homing but when it goes to the final, measuring board thickness, it comes up as Z axis stall. When I put in a piece of wood larger than 6 inches it goes thru fine and carves out the pattern... that is until this morning... It did one carve but when I flipped the piece over for the other side carve it failed...

Did sensor checks and the Z axis was different each time, as follows...

Z axis - 1st run = 49.32, 2nd = 48.44, 3rd = 48.29
X axis = 105.02
y axis = 62.44
These were with the tests... before the test the Y = .007, Z = .012, X = -143.281 Board sensor = 0, board track = 1.370

Any ideas?? Thx

brian