3D Printer Repaired
A workmate of mine teaches 3D printing courses. In the classroom he has 3 set up for use with the students. At home he has 2 for personal use and has been able to make components for sale on the internet, including difficult to find model train parts.
His Thing-O-Matic 3D printer was not printing correctly. This system uses a computer aided program to move a board and the printer head itself in all axes (x, y, and z axis), therefore allowing 3D printing to take place. Also the plate itself has a heating element fitted, so that the plastic will stick to the plate and not move during the process.
The printer has a maintenance test that you can run to help diagnose faults. I was able to run the program and found that all axes were working correctly. My workmate stated that often the project would start to lift during the printing process. Therefore, I focused my attention on the heating element on the board.
Part of the maintenance programming is running a current test to the board. A request can be entered and then a recorded temperature is taken. I noticed that the current request did not match the actual produced current.
Fortunately, I was able to easily access a schematic and the wiring was quite simple.
The heater circuit was basic and only consisted of a thermistor, a resistor and an LED. After checking for voltage at the heater, I only measured 4 Volts and not the required 12 Volts. After tracing the circuit back to the connector, the problem became obvious. The wiring had been stretched and as a result, the wiring had broken internally, but allowing the protective plastic to remain intact.
After closer inspection, I noted that both the positive and earth wires had suffered damage. I repaired these wires and made sure the terminals were correctly retained in the connector. I ran the maintenance program and now saw the measured current match the requested current. My workmate was happy to have his 3D printer up and running once again.
To show his appreciation for the repair to his printer, he made this circuit board holder for me. It has been invaluable when soldering small boards with SMD components, which I used recently in a Plasma TV repair.
So, I had the opportunity to carry out an electronics repair, make a workmate happy again and get a circuit board holder made for me as well. All things considered, I think this was a very favorable repair!
This article was prepared for you by Mark Rabone from Australia.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.
P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.
Note: You can check out his previous repair article below: