View Full Version : Need Help! Chinese BOB Jumper settings

05-16-2013, 09:36 PM
I have a 6 axis bob question about the jumper settings. I understand that the jumpers JN1 and JN2 isolate the 5vdc from the DB25 (computer) from my external power supply. However the J4 jumper I don't understand. The installation pdf I have says "J4 is the GND and the POWER + of the isolationg source:" I am attaching a screenshot of the pdf. The entire pdf is at: www.nbglin.com/download/cnc25.pdf‎.