Mastercam X5, Mach3, KL 1212

So I start my program after I bring up the Z to clear the material and my Z jumps up on the screen as well as on the table.
I then have to remove the dust brush, reset the Z and hope it acts properly.
In most cases, it’ll start to move to the start position but stay up.
I then bring it back down while spindle is on... drop to ZERO then adjust the depth.
It’s DRIVIN me crazy!!!!!
Any ideas why this is happening?


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