Looking for guidance

    Here's the corrected version of your text:

    Hello everyone!

    My name is Lekso. I am new to this community and to robotics and welding in general. I have basic knowledge of welding and a software engineering background.

    My current occupation requires me to work with the QJR6-2000H robot. The company I work with uses this robot as a door frame welder. My task is to write a program that will work with 2mm steel. I am totally lost, as I know that writing the program is just the tip of the iceberg. First, I need to find the proper parameters for welding. The robot uses mixed gas for shielding with an 82-18 (Arg-CO2) ratio, and the wire options are 0.8mm or 1mm. Currently, I feel lost and don't know what I should ask to progress with my task, so my request is for help with the basics. If anyone could point me to resources that I could use to raise my understanding of robot welding, it would be greatly appreciated.

    Thanks for your attention.

  • MOM July 7, 2024 at 10:29 PM

    Approved the thread.

    The first step with any complex task is to break it down into simpler tasks.

    I would say that the first task is to simply get the robot to follow the path you need -- program a path that takes the welder tip along the correct weld. You may find areas where the robot can't reach, or can't turn a corner fast enough. Just get a feel for what the robot can and can't do -- a motion path that works well at low speed may fail at high speed, for example.

    Second, welding. Don't try welding on a production door frame -- set up a nice flat test coupon of the same metals, in the same thickness, and run simple test welds on that. Be prepared to burn through a number of coupons. Try different parameters -- robot speed, gas, wire diameter, stop/start parameters, current/voltage, etc. The goal here is less to find the perfect parameters for welding the door frame (although that would be nice) and more to grasp how the weld changes when you change those parameters. Try to only change one thing at a time -- if you change current and wire feed rate at the same time, and the weld changes, you won't know which parameter caused the change. Once you can do some decent straight-line welds, try some corners and circles. Take your time, don't hurry -- this will not be a fast process.

    Once you have the best weld parameters from the coupon, it's time to combine them with your weld motion path. The first weld on an actual part will probably not be as good as on the coupon -- that's fine. The point of trying many parameters on the coupon was to develop a sense for how to tune the weld parameters.

    Break the production weld up into smaller programs, if possible. Debugging a smaller program is always easier than debugging a big program. Robots don't like sharp corners -- instead of trying to make a non-stop weld through a corner, it may be better to make two separate welds that meet in the corner.

    If there's any existing robots already doing a similar task, grab a backup from that robot and examine it. Don't hesitate to steal anything from that robot program that might help you -- at least 50% of professional robot programming consists of re-using old code.

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