i have been using easel for about 2 yrs now and within the past few weeks iv been having troubles with easel stopping randomly without finishing the carve/cut. i tryed useing both chrome and firefox.no luck.Ive also updated the drivers. again no luck.if anyone has a similar problem and solution PLEASE help.
Checked the brushed on your Dewalt?
These wear out after 150-200hrs at speed 1.
Replacement brushes can be bought on Amazon.
Youtube have videos showing how2 
You are saying brushes that are worn down will stop the machine (CNC) from carving?
If they wear down they will spark a lot more and cause increase/spikes in EMI/RF noise which will affect the USB-connection between the PC and controller. If this is interrupted cnc will stop before it is finished. Wintertime in may areas also = dryer air which create greater chance of static issues (static electricity)