ASHLAR HATCH PATTERN AUTOCAD JOBS PLUS
With those larger diameter cuts and the leverage they exert on the tool itself, plus the spindle bearing clearances and all those parts of the head, tilt/nod assembly, ram etc a dead perfect spindle tram to the table is still only a static condition. I still got minor tool marks from my fly cutters tool tip dragging on the back side of the cut. A really frustrating job that I spent a couple of hrs doing.
ASHLAR HATCH PATTERN AUTOCAD JOBS FULL
I spent a great deal of time once trying to get as close to perfect as possible tramming job on my mill and finally managed to get it to under a couple of 10ths over 12" in X and the same in Y for the full distance of my Y axis travel. And fly cutting just high lights there built in rigidity issues. Imo despite how common they are BP's and the clones are a really flexible combination of parts even in brand new condition with a spindle suspended a long ways out in space as far as having something really rigid to cut with. 1018? And what you already know an obvious tram issue if your getting a step at each pass. Not one of the better grades of steel that are known for producing easy to get good surface finishes since it looks like the surface is showing some tearing.
Maybe a few combined issues from what I see Glenn. Here’s a pic of the raised surface area, with a finish recut over the top.Ĭan anybody advise the most likely avenues to examine for finish and DOC problems with a fly cutter? Speed around 250-300 RPM, very slow feed rate. Power feeds on the table, all around.īTW, I ground and polished the tooling edges just prior to using the fly cutter. Still has scrapping on the ways, all around. The mill is A NOS Bridgeport clone built in 1980, but in still in excellent shape, having been used lightly by a hobbyist since new.
Also will take a photo of the tool tip and post) Ron’s tramping thread from a few days ago- going to go recheck my alignment on the machine with the comments people offered. I assume this a tram problem, but why would it suddenly materialize. 0005” or so and leaves it like it was hit with 60 sand paper. It’s as if the cutter scratches the back side. But the back side of the cut started leaving a rough surface, half way through the job. The cutter bit cuts a smooth finish on the front side of the cut. The edge appears as a line running right to left.ģ) finally, I tramed the quill but still end up with a rough surface on one axis. You can sort of see the raised area on the left side of the photos- middle of the board. It’s almost as if the work pice is controlling the DOC, rather than the mill.
008” DOC actually left a noticeable raised area over one half the path of the cut. I’ve been trying to level and finish surface a 6” x 10” bit of 1” plate to use as a base for a shop made tapping fixture.ĭecided to try a 2.5” fly cutter that’s been laying around in my tooling cabinet for a couple of years.ġ) each finish pass (.003” doc) leaves a little bit of edge overlap on the sides -I can feel the lip with my thumb.Ģ) one fairly deep finish pass- maybe.
0 kommentar(er)
