This artical is aiming to provide some detailed guidance on installing the Extension board and solving some frequently occured issues after installed the extension board.
We will focused on the cable connection during the installing and the limit switch fault after installed the extension board.
Installation of the extension board.
Step 1. Make sure the printer is turned off, installing with electricity on will may cause short circuit and destroy the electronics. Please first refer to the guidance video to finish the first 3 steps in the video , Remove the original PCB and cables and install the extension board .
Step 2. Insert the small FFC cable one end to the connector on the mainboard, Insert another end to the connector on the extension board, Please notice that ,to insert the cable, ensure the wire exposed side face downwards.
Step 3. Plug the Y and Z axis limit switch cable connectors to the corresponding color connectors on the extension board .
Step 4. The most important step, This step was missed in the video ,
Insert the limit switch cable connector originate from the mainboard (white connector with Y and z limit swithc cable combined）.
The cable is shown below, it should be included and installed in the original machine, but the cable could be faulty when using with Extension PCB.
Before insert the cable , Please check if the cable is faulty, for some cables the connector was wired reversely in factory, which is defective when use with Extension PCB. The defective cable can work with the original small PCB board, but not with the extension board, it will caused the limit switch unable to be triggered on Y and Z axis. That means when initializing the printer, the z axis will not stop and will keep moving even when reached the end cap and causing the initialization to fail.
The reason for the issue, is before releasing the extension board, The small PCB will work on any polarity of limit switch. So it does not matter, if the connector is wired correctly or not, but when connected to the extension board polarity does matters.
That 's why you may found the limit switch can work with the original PCB but not with extension board. For some early buyer may have this issue, and please contact our support team to get a new and correctly wired cable (or you may simple reverse the wire by yourself). We added this cable in later extension board package, so when install the extension board, Use the new cable .
After confirming the cable is good, connect the two 2-pin connectors to corresponding connectors on the mainboard and the 4-pin white connector to the extension board's white socket.
Step 5, The final cable connection is shown as below, Do not change the stepper motor cable and keep them stay in original postion and inserted on mainboard, Dont need connected them with extension board.
Step 6, Then refer to the video to finish the installing the cover and the assembling of other parts. If you need use the heated bed, please make sure the heated bed FFC cable need be inserted to the extension board with the exposed wire side facing upward.