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Lead in to material8/15
I was wondering if anybody could recommend a way to lead into the material(mainly melamine) avoiding chipping on entrance.
I'm currently Leading in on a linear entry and descending into the material.
I've attached some photos to show what i'm talking about.
Looks like you might be ramping in with a 0° angle from the next move. The chipping could be coming from the upshear portion of the compression tool you are using as it ramps in. You could try to ramp in at a small angle, perhaps 0.5° or 1° angle to the cut, then overlap = to the radius of the tool or greater before leading out at the same distance and angle. That will allow your nests to remain packed tightly. If you are not ramping in, do that. Vertical plunges causes all kinds of ugly, including tool wear and chipping.
I used to get that issue even with an angled entry, until I switched the entry point from the midpoint of the part to the corner. I still ramp in at an angle using Enroute 3D entry strategy. See toolpath graphic and settings attached. No chipping now.
I start at a point along the long edge of a part all day everyday without chipping. I'd be interested in the cause. Tool deflection, bad board, improper lead in, etc. We recently, out of the blue had bad board from Arauco that was chipping a great deal and eating tools. Switched board suppliers and that cured the problem.
I use a 3/8" compression spiral, and I typically plunge the bit into the work until the upshear portion is completly buried. Then ramp down to mitigate wear on the bit. This seems to work pretty well, I have no chipping at the entrance of the cut, or through the ramp.
I always start at a corner and go straight in with out ever having any issues, I use a 3/8 double flute bit.
Thanks for the responses I ended up figuring it out an alternative way.