z crashes immediately into table...

[pescadoman]

a screen shot of the program as it started

[cncsnw]

In the report.txt file you posted, the Z axis part zero location was set at 1.2553" *above* machine zero. The G28 return point (used with M25 and M6) had the Z axis going to machine zero. So, with those settings, any attempt to move the Z axis to machine zero was going to move to 1.2553" below your part zero.

That part zero setting is/was wrong. Since you should be homing to the positive limit, and you are not using tool height offsets, your Z axis part zero should always be a negative value.

[pescadoman]

In the report.txt file you posted, the Z axis part zero location was set at 1.2553" *above* machine zero. The G28 return point (used with M25 and M6) had the Z axis going to machine zero. So, with those settings, any attempt to move the Z axis to machine zero was going to move to 1.2553" below your part zero.

That part zero setting is/was wrong. Since you should be homing to the positive limit, and you are not using tool height offsets, your Z axis part zero should always be a negative value.

I set the z zero high on that report...I believe, to show it would simply dive straight down. I actually hope that you are correct and this isn't some weird anomaly that I need to worry about. This is how I cut.

Set z to part surface in software. XY to whatever corner...sometimes middle...
Lower z to part surface/corner or center and set zero's.
Recheck G Code.
Cut.

[cncsnw]

Set z to part surface in software. XY to whatever corner...sometimes middle...
Lower z to part surface/corner or center and set zero's.
Recheck G Code.
Cut.

When you first turn the control on, you need to set machine zero (machine home).

Usually this is done by letting the machine home to its switches. You have instead selected "Jog" as the homing method, meaning you have to jog all the axes to a suitable machine zero position, then press Cycle Start to set machine zero there.

Is that the point you are describing in your first step, "Set z to part surface"?

If so, that is where your problem lies. Machine home on the Z axis should be at maximum height, not at the surface.

[cnckeith]

thanks Marc good catch.

yep! part zero and machine home are not the same point. part zero is relative to machine home.
this article covers the subject well.
https://www.autodesk.com/products/fusio ... made-easy/