dx32 spot drill in mastercam

[fjbart70]

I am having an issue creating a spot drill using mcx3.

I have a 1" solid block that I have defined with a stock setup extended .5" on each side.

I want to drill a .25" hole in the block, but first want to spot drill above where the hole will be at the top of the stock.

I have z=0 set to top of block. Therefore top of stock is z=.5.

I created a drill toolpath for the spot drill and set the Top Of Stock =.5 and the hole depth = .4

So I expect the spot drill to go into the top of the stock .1" deep

The back plot looks correct, but whe I run it, the spot drill wants to go .1" into the block!, or .6" deep from the top of the stock.

The g-code explains why this is happening:

N20 M06 T1
N30 S1069 M03
N40 G0 X.651 Y-.35
N50 G0 Z1. M08
N60 G81 X.651 Y-.35 Z1.6 F1.1
N70 X1.599
N80 G80
N90 M09
N100 G00 M25
N110 M22

I understand that the canned cycle works on a offset from the last z position and is a non-signed number.

SO I see that it goes from Z1. to Z1.6 which is -.6 from top of stock.

I have tried everything variable and i can't get the g-code to produce something with a z1.1 like this:
N20 M06 T1
N30 S1069 M03
N40 G0 X.651 Y-.35
N50 G0 Z1. M08
N60 G81 X.651 Y-.35 Z1.1 F1.1


Does anyone have any idea why this is happening?

I have attached the MCX file that i am working with if you can take a look.

[Jaguar]

The Z depth should be Z.2. Look in the manual and you will see the that drill depth is a positive number from the rapid plane. Mastercam should have a post for this machine, it is certainly old enough.

J