Cutting depth below program zero

Software Carbide Motion
1

Hello folks,
I am trying to diagnose why I get this warning in Carbide Motion. I created a file in Fusion set up two simple CAM operations, one pocket and one contour. The contour is set to the depth of stock.

The stock is 1.5", but Carbide Motion indicates that the Program Size includes a Height (Z) = 2.1"

I am not sure if this is due to Fusion or Carbide Motion. I have ensured that the units in Fusion and Carbide Motion are both set to Inch.

I’ve used Fusion as my CAM for some time and this is the first time I have run into this. Any thoughts appreciated.

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This is a warning as noted at:

https://carbide3d.com/blog/carbide-motion-bounds-checking/

Usually it is caused by a mismatch between job setup:

https://carbide3d.com/hub/courses/create/job-setup/

and how origin is set relative to the stock:

https://carbide3d.com/hub/courses/running-shapeoko/movements-zeroing/

I find that opening the .c2d file up and drawing a box which matches the specified dimensions (draw up the cut in profile if need be) or moving the machine to the origin and then using a tape measure to measure out the dimension(s) in question will make clear where things aren’t lining up.

3

If the Z zero is on top of your stock, then the “Cutting depth below program zero” of -1.50in is correct. If you have 0.6" retracts, then the total envelope of the toolpath is 2.10" (1.5 below zero, and 0.6 above zero.)

2 Likes
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Thanks for the quick reply as always @WillAdams ! I’ll make sure I read those resources to further educate myself.

1 Like
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So then you response seems to indicate it not something to be concerned with as long as I verify my retracts are 0.6".

I just checked and my retracts are set for 0.4", I’ll give it a go and see how it proceeds.

I must have just not paid much attention to that info before in the Job Preview.

6

Well that was it @Tod1d ! I love how helpful this community is. I am always impressed with how fast people jump into help each other. Thanks.

1 Like
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