I used a core sample drill to locate a Pyrite mineral vein and set an Excavator from the Immersive Engineering mod on the same chunk.
The multiblock structure formed correctly and the wheel is turning but is not pulling any ores from the ground. I did supply it with enough power as there is no lag in its movement and the vein is still at 100% integrity. The only thing part that worked was the initial run when it moved the dirt that was near the wheel. I left it running for at least 20 - 30 minutes and it has not pulled up any ore, just the dirt from the initial run.

Maybe it has the same issue with the Digital Miner from Mekanism that does not work as well.