Recently, I visited many junkyards near my home trying to find whatever materials that I think would be useful for making a home-made cnc machine.

Switching Power Supply 350W with ball bearing fans and power factor correction

Switching Power Supply 350W with ball bearing fans and power factor correction

One day I found a switching power supply with output of 350 W when supplying voltages of +3.3VDC, +5VDC and +12VDC. One end of the enclosure was slight bent, the result of forced dismantling by somebody, but after I had tried to bend it back as best as I could and supplied an input power of 230VAC to it, with a jumper wire between the green and black connectors, it worked perfectly. It would be an expensive unit  if I were to buy it new because it came complete with two ball bearing fans, noise filter and power factor correction features.

Switching Power Supply Dented Left

Switching Power Supply Dented Left

Not bad for a short time spent on repairing the enclosure. What was even more interesting was what I found at the end of another day. I had almost given up finding anything useful for making a cnc machine when I happened to come across a junkyard that I did not notice before.

Switching Power Supply Dented Right

Switching Power Supply Dented Right

When I entered it, I saw some workers laboring on a heap of materials. When I looked closely, it was exactly what I had been looking for – parallel rods with linear bearings. I had missed the chance to acquire a pair of parallel rods that I saw previously at another junkyard which was meant to be powered by pneumatic cylinders. When I got home, I could have cursed myself for refusing to buy it there and then. They would be useful for converting my home-made drill press, which, as I had mentioned before, was not exactly very precise because there were necessary clearances that could not be avoid when I made them out of wood slides. With the parallel rods and linear bearing assembly, I hoped to make the drill press more precise.

Parallel round rods, linear bearings, stepper motors, lead screws, power supplies, bearings, pulleys

Parallel round rods, linear bearings, stepper motors, lead screws, power supplies, bearings, pulley

Motor couplings, linear bearings, radial bearings, timing gear pulleys

Motor couplings, linear bearings, radial bearings, timing gear pulley

What I found could be described as a treasure trove to me. I found a whole cache of parallel bars, linear bearings, big stepper motors, radial bearings, motor couplings, lead screws, – the whole lot of items that I would take months to find. What was even more wonderful was that I could get them at an extremely cheap price. I was sold the items based on scrap metal prices. And the workers were a big help. They observed what I picked up and then showed me what they had previously dismantled. In fact, I went again to the same junkyard early the next day to look for all the smaller parts like bearings, motor coupling, etc. A check on Ebay and Amazon later revealed that the items actually cost at least 10 times what I was able to get at this time. It is truly a wonderful experience to find such treasures! I could only reflect with amazement. Wow!!