Traindriver mentioned scrap in a recent post and it got me to thinking. How do you all deal with the problem of ruined pieces? The project I am currently working on is two sided with 18 different tool paths. Needless to say I made the first cuts with great anticipation. Two ruined pieces of Brazilian Rosewood later I started the third piece with great trepidation. It finally turned out OK but there are still minor flaws which will not be apparent in the final project. On complicated jobs do you run a trial using cheap wood first? Sometimes the machine seems to run the program in a different order than the software toolpath preview shows. Why is this? My AR4 does everything I have tried so far but I am still asking "Charley" in England for help with Vectric from time to time.
Initially, when I started this CNC journey, ruined pieces were not all that uncommon. Thankfully, that's not the case 3 1/2 years later. That is not to say that I'm not nervous on occasion. About the only time I do test runs now is for text or background textures. This is just to see how a particular bit performs the task.
Post by buildswithbrian on Aug 5, 2019 6:42:31 GMT -5
given that you are new to CNC machining (sorry if I am making an assumption here) then it would be practical to to test piece on less expensive wood until you gain more experience. There is an overwhelming number of things to "screw up" when it is all new to you. (I speak from personal experience) the CAD work, the CAM work, the machine set-up, the actual operation of the machine, how you clamp your work.
Again I might be making an assumption here, about your experience, but perhaps you should slowly work on projects that build your skills a step at a time, progressing along the way, and tackling more complicated projects.
so you did not mention exactly what went wrong with your current project? Is this 2d work ? or 3d work ? what exactly happened?
Post by traindriver on Aug 7, 2019 18:16:54 GMT -5
I think Redwood and I started about the same time, and I have the same experience. I still screw one up from time to time if I'm doing something new, but thankfully, most of the dumb mistakes I made at first are in the past (forgetting to reset the Z between tool changes, etc.). A buddy of mine took almost every piece of scrap I made because even though they weren't perfect, it was something he hadn't seen before, couldn't buy, and it was free. He would figure out a way to make it presentable and put it in his man cave.