Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
You're using a Gecko G540? Did you insert the correct resistor for the current control? If not see the manual for value and placement.
Zee's example is running at 7" (180mm/min) not 0.7".I've just drawn out the part and then used Fusion to do the CAM, not all the details are in the CamBam example as it does not mention speed and only gives depth of cuts (vertical) but no step over so I used approx 2/3rds cutter dia for stepover (0.080") and my max spindle speed of 5000rpm otherwise all as per the example. and it takes 30mins to run.As said it's not how I would cut it, preferring to use more of the side of the tool and a 1/8" cutter would need long flutes to get through the 1/2" material, also don't fancy trying to get the swarf out of the hole when using it to drill the 3.6mm holes at full depth. Will run the CAM again with some settings that I would use and see what it comes out like.
[I did insert a resistor. As for whether it is correct...I used 3.3K ohm which should limit amperage to just under the 3.5A max.If it helps any, there's no load on the motors. Just a plastic flag to see it turn.
Is the 3.5A max the rating of the stepper motors? Or of the driver?Of course, you should not run the motors with more amps than they are rated for.
Gcode loops are caused by a mismatch in arc center mode between the CAM and the control. For a G2 or G3 command, the IJK options state where the center of the arc to follow is located. I highly recommend you use incremental, meaning the I and J words state the distance in X and Y to the center from the current position. This is the default setting in Cambam.https://www.cnccookbook.com/cnc-g-code-arc-circle-g02-g03/
But with the modern CAM systems I'm not sure why anyone would want to do that [use cutter comp] anymore.