We are (and have been for some time) involved in various automation projects that mostly involve fiber engraver lasers and moving parts. Our conveyor systems are gaining popularity in the production market, and the price is very reasonable.
Our Fiber Product Manager, Warren Schoeman, recently installed one of our fiber lasers on an existing system to replace an old fiber that was not economical to repair. This is his story :
I would like to tell you the story of how we managed to successfully supply and install an automated engraving process for our client, Charles Rust Associates CC.
Charles Rust is in the business of producing and marking tags that go onto containers and trucks to avoid tampering. While Charles has done this for many years now, the industry is changing. Charles soon found himself dealing with increased costs of outsourcing work, long turnaround times and inconsistencies in the products he sells. Frustrated, he took his interests to in-house solutions.
Charles started off importing his own fiber lasers a few years back. When the machine arrived he soon learnt that in order to improve he would need to somehow automate the process for the best possible results. Having the equipment at hand, he designed and produced a custom feeding system for his tags and seals. This system makes use of a PLC (Programmable Logic Controller) which controls an electronic lifter to move the tags along the table, stop where the laser would mark the tags, move the tags along and repeat the process.
The process worked well and Charles soon found the need for more fiber lasers. He purchased a total of 4 fiber laser engravers before contacting Perfect Laser Technologies for assistance.
I took the call and explained to Charles exactly what we do. We discussed specs of the machines and costing. Charles also explained to me that he had a few machines and he had built custom automated feeders which we would need to configure our lasers to talk to. Challenge accepted.
Charles purchased one unit from us as a trial. Upon delivery of the laser, all went well. The laser was successfully installed and tested on Charles’ premises but the real job was yet to come. We now faced the task of getting our laser to talk to his automated feeding system. What a challenge it was. We spent the entire day looking at diagrams, checking the wiring and cross-referencing our laser's internals to one which he already had working before. Eventually, after gathering enough information we started the process, it was not easy.
By the end of day one, we had the laser talking to the feeder but not completely. We managed to get the feeder to feed material, stop, engrave. And that’s where the process ended. We knew that we were very close but could not figure out the problem. We then turned back to the existing laser for reference. Turns out there was a special device installed in the existing laser which was sending a finish signal back to the PLC. This device is a solid-state relay. Our laser did not have this. It was late already, around 7 pm when we called it a day.
I went back to the office the next day and with assistance from Dion (our CTO), we managed to find and purchase a few of these solid-state relays. We then scheduled a return to Charles to finish the setup, armed with our new device!
We returned a few days later with the new knowledge and equipment. Many wires and much soldering later we were nearly there but we ran into a problem. Because Perfect Laser did not build and program the PLC, we were not sure of where the signals were going and how to configure them in our laser software. Again after a long day of trying we had to call it off and returned to the office.
Determined to complete the setup we contacted the man who had built and programmed the PLCs (Wesley). He kindly agreed to meet with us at Charles’ premises to work together. Wesley explained how he had set up the PLC, and which signals it was sending and receiving. With this new knowledge, it all became clear how to get the final signals wired correctly. A bit of wiring and soldering once again, and we finally had the signals and wires in the correct locations. We tested the system and again, we only managed to achieve the same results. The machine would again stop right after it had finished the engraving.
Knowing that we had all the signals and wiring correct on both the laser and PLC it was evident that the laser software had to be tweaked to allow the correct signals to be sent. Inside EZCad’s ports settings, we were able to quickly determine which ports to use for the start, stop and finish signals. We set them up and ran the process once more. Bam! Success! The PLC was now able to receive the signals from the laser. It would; feed the material, stop on location, the laser would mark, send the finish signal back to the PLC and repeat the process.
This meant that as long as there was material in the feeder, the feeder would continue to mark a name, barcode and sequential number on every seal/tag along the way without stopping.
Having this system in place has saved Charles thousands upon thousands of rands in production costs, labour and material. Not to mention time.
Charles had a huge backlog of orders which he now could complete within a few days.
Charles is also in the process of purchasing another 5-8 units from us which will be installed exactly like this.
Oh, I should also mention that we have assisted him in getting his other lasers to work on the feeder now too. Each laser will have its own feeder in the coming weeks which we will install.