Job position changes when disabling layers using Absolute coordinates

[saramos (Scott Ramos)]

I am trying to understand the operation of Absolute Coordinates. I have a small project that consists as two layers. The first layer is a box outline. The second layer is an image. If I home the machine and run the job with both layers set with output on, the two layers are engraved in their proper relative positions.
But if I disable the output of the image layer, home the machine, and run just the frame layer, it will produce the frame. Now, if I home the machine, disable the frame layer and enable the image layer without moving the material, and run the image, it is etched in a different location and no longer registered inside the frame as when running both layers at the same time. I do not understand this behavior. I thought that when running in Absolute Coordinates that the job runs in relationship to the grid representation of the work area. Any help or insight would be appreciated.

The machine is built around the Makerbase MKS-DLC-32 v2.1 controller.

[saramos (Scott Ramos)]

Here is the results. The one on the left was run with both layers enabled. The one on the right was run first with just the frame layer enabled, hommed, then run with just the image layer enabled. I would have expected the one on the right to be the same as the one on the right.

[misken (Melvin)]

@saramos

I thought that when running in Absolute Coordinates that the job runs in relationship to the grid representation of the work area.

Interesting problem because in my opinion, you understood correctly and it should work as you expected. One thing that came into my mind - which image algorithm are you using? Pass-through? Because in that mode, the image size might change depending on the included image information. Though, this should also be the same in both cases…