This is a picture of the complete auto focus system for a laser engraver. While you may not be experiencing problems with the auto focus system, disconnect/reconnect part of this system to test your X-Motor.
First turn the machine off and disconnect the power cord.
The X motor PCB is located under the black box on the right hand side of your rail. The rail is the metal bar that moves forward/backwards inside the machine when lasing. Remove the black box on the right hand side to expose this X motor PCB. Where the orange arrow is pointing in this picture (the 2 white connections there) is where the X motor (the silver cylinder under that black box) connects to this board. Disconnect and reconnect those 2 connections.
Then you will see the X motor flat cable that connects from that board to the main board. The base that the flat cable plugs into is a wedge type plug. It is in 2 sections, the base and the lip. You will need to grab the connection on each side. There will be a small lip that you will feel. You will need to pull this lip away from the board to release the flat cable. It will only come up about 1/16th – 1/8th of an inch. Once the lip is up you can disconnect and reconnect the flat cable. Once the flat cable is back in place, push the lip down to lock the flat cable into place. You should be able to give it a slight tug and the flat cable should be secure. Do the same process on the Main board connection end of that flat cable. The main board is located on the outside of the machine on the right hand side. Remove the large access panel to expose the main board. Follow the same process to disconnect and reconnect the flat cable on the main board.
While you have the X motor flat cable disconnected from both ends, you can test it with a Multi-meter. On your multi meter, set it to the Ohm’s setting represented by the symbol on the left.
Using a multi-meter to test X motor flat cable.
- You will need to test these settings when the rail the laser head rides on, in these positions.
- Very back of laser table. (furthest point away from you)
- Middle of laser table.
- Very bottom of laser table. (closest point towards you)
- Pin 1 should have connectivity with Pin 1. If not replace X motor flat cable.
- Pin 2 should have connectivity with Pin 2. If not replace X motor flat cable.
- Pin 3 should have connectivity with Pin 3. If not replace X motor flat cable. So on and so on, until you have tested all the pins on the cable.
Once both of the X motor cables and both ends of the flat cable have been disconnected and reconnected, put the covers back on and then move the head of the laser into the center of the table. Reconnect the power and turn the machine on.
The head of the laser should move to the right hand side and bounce 2 times. If the head does not move or does move over to the left hand side and doesn’t bounce, then the issue is with the X motor and it will need to be replaced.