nope threadmill.

ive been thru this lots of times myself. in my opinion all of those toolpaths you used are crap. the absolute and easiest way to get a beautiful finish on a single taper like that is to use something you would never think to use. try using threadmill.use a ball endmillinstead of a threadmill and in the angle box put the angle of your taper in. for the pitch just put in the stepover you want. you will be very surprised at how nice this will come out! it will do continuous toolpath without a single zipper line or shift mark and you can even run cutter comp on it to tweak the size to exactly what you want.

so I got the 1st batch of these out and decided to try an experiment. I took a pc of aluminum the same thickness a replicated everything I did in the additive manufacturing titanium parts. I left the same amount per side for the boring operation(.002 per side) this time the bore came out perfectly round! not even one tenth out of round. it must have something to do with these printed parts.

ive got it going to get this batch out but what a pain. I leave .003 per side with the 1st rgh tool and then finish the id with a brand new 7/16 em just for titanium. the 1st part came out .0004 out of round and my tol is just .0005. It was large in the direction of my lead in and out. I also overlapped by .100. so now I do one pass leaving .0005 on the wall and then I take another pass at "0" but on the 2nd pass I moved the lead in and out 90 deg. its a horrible way to do it but its reading round within .0002 now and seems to be holding size.

setting 57 is off. ive never messed with it.what exatly does it do?does it make sure its in xy position? does it add time to a programmed part? when I rough the outside of the parts I use a carbide rgh mill,a semi finisher that leaves only .003 and finally a very good carbide endmill just for titanium.the widths I can measure are exactly the same so far on all 20 parts ive done without comping anything at all.

prolly a dumb question but someone used my computer and now if I select something I don't see it highlight till I click to select it. how do I get it back?

sounds easy but 20 of these parts have to be in QA on Monday morning. that only leaves me 8 hrs tomorrow. the print also requires a special type of coolant and the machine was flushed and filled with this new stuff!

the roughed hole is undersized by a total of .006. .003 per side and is perfectly round. that's why I have confidence in interpolating it now. I changed it over already and will start again in the morning. (ill be on the clock then!) these parts are titanium and the 1st production run off of the 3d printer and I was wondering if there were some type of strange stresses in the material but im pretty confident its in the bearings now. when im done with this ill try the same thing on a pc of aluminum .

its our oldest machine in the shop I thought I could do this best by boring the holes. there is also a very tight tolerance between the holes.

I just put a tenths indicator in the bore and its showing exactly what the bore gage shows. the haas troubleshooting guide says the most likely cause is the spindle bearings. while the indicator is in the bore I can grab way up by the spindle and push it and get a few tenths movement. I guess I just picked the wrong machine in the shop to run this on! im going to put a brand new finish endmill in and interpolate the bores.(wish me luck!) there is a note that states we cant use any grinding operations on these parts. I think honing them is considered grinding. ps.......the part is not clamped at all now just held downward with a clamp.

I have some parts that im running that are giving me fits . they are around 6 inches long and look like a dogbone shape. there are 2 critical bores in each end at 1.000 1.0005. op 1 cuts the top face and the complete outer profile at full depth. at op 2 I flip them over and hold on the outer shape in softjaws.it cant really crush the part because the softjaws hold the entire diameter including the bar in the center between the ends. the 1st part cut nice in the machine and the bore measured out nice too but I only measured it in one direction.(stupid me) I rough the id within .005 with an endmill and then use a very nice and expensive boring head with insetrs for the material im using. with it out of the machine it measures .0008 out of round. next part I stopped the mach at the boring op and loostened the jaws till it just barely grabbed and got the same result. now ive got another one mounted and before I bore I put an alum clamp over the center of the part ant back the removable jaw off about .01. in the machine I can see its cutting all the way around but its still about .001 out of round still on the machine! I put a marker on the bore surface and took .0005 more out and could see it cut evenly all around but is still about .001 out of round. at this point im at a total loss. the machine is an older has vf4 and the material is titanium that was 3d printed. the material machines ok otherwise but is a little rough on the tools im roughing it out with. any ideas?

is there a video on this somewhere? im kinda wingin it and getting some kind of results but im not sure if its accurate.

ill letcha know. ill be sending a 3/4 carbide rougher through it in a few minutes at slow speeds and feeds. this is what ive got at the moment.

the parts have to be printed in such a way that we can get the most parts from each build.its very expensive and we only have an 11 x 11 workspace. this means parts have to be positioned in very specific orientations that are not optimal for post machining operations.

thanks but are these carbide high speed and feed mills or are they run at typical roughing mill speeds at full depth and widths?

ive gotta do some titanium rghing on my latest project.ive gotta go thru about a 1/2 inch thickness. the width is about 5/8 that has to come off.i was going to use some specially coated carbide cutters I bought but now im thinking of just going with one pass close to the finish diameter at the full depth at a much slower speed and feed like I normally would do in steel. the part is only about 7 inches long and about 2 in wide. the mat is titanium that was 3d printed in our laser printer. this is the 1st job ive done with any quantity to that we have printed. got any opinions?

we do 2 things first we let mc find the overlapping entities (it marks them with a red point). then we zoom in and either grab a whole chain and drag it to a new location or break the entities where they intersect and make separate chains.it would be great to somehow do the latter I described automatically.

weve been using this a lot for school projects and have been getting some pretty clean vectors from rasters. usually with something intricate we get overlapping entities which we don't find until we try to run the engraving toolpath. is there an easy way to fix this without manually doing it?

I just use the standard lathe post within mc to post to our has tl lathe. when I thread I output code format "longhand" this works well because the machine doesn't like what it outputs for canned. at the end of the thread it does not pull off at an angle as it does if I were to program it on the controller. how can I get it to do this?

at work we use x9 but I teach school at night and they are still on x8. sometimes ill do something or make changes to a file in x9. I always thought you could save backwards to say x8 or x6 but maybe im thinking way back with ver 9. now ive gotta save as a dxf and apply all new toolpaths again. no way around this right?

try using create arcs in other workplanes besides xy. loosten up the tolerance a bit and be amazed!

got it finally! thanks for all of your input. one of the knowledgeable guys from engineering came down and made a small change in my post. now it reads beyond the period. I reloaded the "big inch library " and all seems to bo ok.

oh well that didn't work this has proved to be quite a problem for me. if I select a tool from the "big MM INCH " catalog it does have all inch size tooling in it but it uses metric values for the diam and length. back to the drawing board I guess. i think i need to get my post to stop terminating anything beyond the period in the description.

looks like the "big inch library " included in mc has number drills starting with NO. and "bigMMinch lib"drills start with #. this lib works for me. I always thought this lib had metric tooling in it too but it looks like there are just metric engraving tools. how do I direct my config to look for this tool lib instead of the other? when I tyr to change operation defaults it is grayed out where I would set the tool lib.

ok so I really messed things up now. I opened the inch lib that my post was looking at and did a replace all NO. with # it did over 700 instances. now nothing at all will open in that library but when I switch to BIG IN MM library all the tools are there and the drills also have the # sign ahead of them like it should. it must have changed something somehow.