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  1. 1plus1

    need cut conditions for mild steel

    What are your cutting conditions exactly? Focal point, feed rate, oxygen pressure, power settings, etc.
  2. 1plus1

    Minimum hole size

    I understand your dilema. Fortunately for me, I work for a job shop where experimentation is welcome. An operator should be allowed to be somewhat of a process engineer. I have spoken to several operators at maintenence and operation training programs and it is amazing to find out that a lot of...
  3. 1plus1

    Minimum hole size

    No, that is not true. Good quality holes smaller than the thickness of the metal can be accomplished by specific cutting conditions. Although I am not familiar with a Bystronic laser, try decreasing the feed rate, power, duty, and frequency. A .406 diameter hole in .500 plate should not require...
  4. 1plus1

    Resonator questions

    For an explanation of laser beam mode, or also known as laser beam profile, check out this site:http://www.spiricon.com/techinfo/publications/industrial/applying_beam_profiling.shtml. I am not familiar with your Mazak, but I have operated Trumpf, Cincinnatti, and Amada lasers since 1991. I...
  5. 1plus1

    New to lasers - Just got an old Mazak and need some advice

    I am not familiar with Mazak lasers, however I have experience with Trumpf, Amada, and Cincinnatti lasers and my advice to "newbies" is to begin with the basics. First, make sure the lens is new, or at least clean. Make sure nozzle tip is in good shape and has the recommended tip hole diameter...
  6. 1plus1

    How do I clean up my cut ?

    Do you have a test square program to try different cutting conditions and focal points on a scrap piece of 1/2 ms? Is your lens clean? Simply cleaning a lens or replacing an old or pitted lens will clean up a cut. A 1.5 mm tip maybe too narrow. Try something larger. Make sure beam is properly...
  7. 1plus1

    Burning While Grinding

    Thanks for all of the ideas, but the problem is solved. I don't have the exact details just yet, but our programmer changed the program. I will find out from the ME, who was assigned to the case , exactly what was changed. He is going to examine the programs before and after. From what I...
  8. 1plus1

    Burning While Grinding

    The coolant is under pressure. I am not sure what the size and RPM of the wheel is, but i will find out. I am under another assignment right now. The casting matterial has not changed according to vendor, but we might have our metalurgist check it to make sure. We have changed dressers to no...
  9. 1plus1

    Burning While Grinding

    The wheel is the same in all aspects, coolant is at proper mixture, we have tried adjusting where the coolant hits at various angles - only helped slightly, same operators for seven months, and same fixture. The only possibility I can think of is that the castings have more material to remove...
  10. 1plus1

    Burning While Grinding

    We have been creep feed grinding parts for months now on some casting parts and everything has been running well until recently. The parts have been showing burning along some of the edges. The grinding wheel is fairly new, coolant is ok, and the program and dressing has not been changed. We...
  11. 1plus1

    Laser cutting help

    When you talk about external mirrors I am guessing you mean the x and y reflective mirrors. Replacing mirrors 4 times in 750 hours is a major problem, especially with the newer machines out there. Are you using nitrogen as a purge gas or shop air? Nitrogen is much better. Try increasing purge...
  12. 1plus1

    Cincinnati CL-707 2500 Watt.. New Job...Cut Conditions Help needed

    Sorry I can't help you with specific cutting data, but when we had a Cincinnati 1500 watt laser years ago, we contacted the factory tech and he helped us out. The cutting conditions in the books are usually worthless, however the tech gave us some more realistic cutting data to get us going in...
  13. 1plus1

    Grinding Problems After Shutdown

    Thanks for the help. Our team has discussed loading a scrap piece at startup just to see where we are at and then adjust as needed. We are backing off on the offsets now and adjusting to bring it back into tolerance. But this wastes almost an hour, but better than a scrapping a part. Once the...
  14. 1plus1

    Grinding Problems After Shutdown

    We run production parts on a Blohm Grinder with tolerances usually around + or - .001. After a shut down of 48 hours over the weekend, the first part off the grinder is usually scrap. It is usually .002 or .003 under tolerance. Anyone have any ideas of what is happening? Wheel balance? We have...
  15. 1plus1

    "manufacturing" drawings ?

    I have worked in a job shop since 1983 and to answer your two questions, in my opinion, I would have to say "No" to both. However, question two should be answered by a lawyer. Most job shops that I know of, including ours, quote a price up front taking in consideration many factors, including...
  16. 1plus1

    improving laser cutting finish

    I am somewhat familiar with Amada lasers. I assume the laser uses cutting data sheets. Small square or round holes are tricky in thick metals, but not impossible. You will have to experiment on a scrap piece first. You cannot use the same cutting data on the contour and the holes,it generally...
  17. 1plus1

    improving laser cutting finish

    Many factors contribute to a good finish on a laser cut. Proper parameters or cutting data(Wattage power,duty, frequency,continous wave), feed rate, oxygen assist gas pressure, lens focus, clean lens, nozzle centering(alignment),and proper nozzle tip. A focal length of 7" is better than a 5" on...

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