John is right. The arc center cannot be the point you choose or the box will be grayed out.

I saved the toolbar state and it does work to just reload it rather than rearranging all the time however it's still annoying to have to do one more thing when I start up. Oh well, I guess my theory about the 2 screens is bust too. Maybe someone will have an explanation or it will be fixed in MR2

I'm having the same problem. It's driving me NUTS! I'm running 2 monitors and my suspicion was that because one is wide screen and the other is standard format maybe when It goes to fit on the smaller screen it has to re-arrange? But maybe not if your having the problem too. Are you running 2 monitors also Murlin?

I always climb mill my threads. Oh, Do you mean, from the bottom up? I've had great success with that too. If the hole is a bottomed hole I will often start at the bottom of the hole and cut up.(Gives the old heart a break) In this case it was a through hole so I started from the top. either way I'd have to orient the spindle and offset the cutter to keep it away from the wall. either I has to do it before the tool came out or I had to do it before the tool went in. I could not find an easy way to force Mastercam to post it that way so I just used the OL' MDI method.

On this job I was cutting .01 per pass because of the tool rigidity and the material.In Aluminum using a multi tooth thread mill I often do it in one pass with a spring cut. It definitely depends on your application. If you give me more details I could offer more suggestions. The code is a little weird at the end of each pass. I had to use the tool path editor to move the tool off center at the bottom of the hole and manually added the M19 to orient the spindle in order to retract the tool without crashing. That's not something you normally have to do but because the size of the minor diameter of the thread and the cutter diameter there was about .01 interference so it was a must. Hope it helps. If you need it, I could post a more straight forward example. good luck

Here is a thread milling cycle for 3/8-12 Acme threads in 17-4 with a single lip cutter. sorry it's so long but the material sucks so I had to take it easy. Code is for HAAS I often thread mill 1/4-36 threads with a multi-tooth cutter also let me know if that would help. I could possibly give you a screen shot of the thread mill settings page if you need it. -Mike O10000 ( RETAINER THREADS) ( DATE 07-06-07, TIME 10:14 ) ( MATERIAL - STEEL INCH - 17-4 STAINLESS ) ( T9 | ACME THREAD TOOL | H9 ) N100 G20 N102 G0 G17 G40 G49 G80 G90 N104 T9 M6 ( ACME THREAD TOOL ) ( ACME THREAD G54 ) N106 G0 G90 G54 X.4215 Y-.38 S2900 M3 N108 G43 H9 Z1.25 M8 N110 Z1.05 N112 G1 Z.9708 F6. N114 G2 X.422 Y-.3795 Z.9604 I.0005 J0. F2. N116 X.4225 Y-.38 Z.95 I0. J-.0005 N118 X.4215 Y-.381 Z.9292 I-.001 J0. N120 X.4205 Y-.38 Z.9083 I0. J.001 N122 X.4215 Y-.379 Z.8875 I.001 J0. N124 X.4225 Y-.38 Z.8667 I0. J-.001 N126 X.4215 Y-.381 Z.8458 I-.001 J0. N128 X.4205 Y-.38 Z.825 I0. 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I have X2 mr1 sp1. My Mastercam still Lags when it's running all day. I often have to shut down Mastercam and restart it a few times a day to get the best performance. Some say the evil "Memory Leak" is the cause. Sometimes it also does weird things like certain functions don't work when I initiate them. After a Mastercam restart. It's all good again. Just this week I was trying to X-form something and it just refused. I'm hoping MR2 will take care of it.

NICE!

Your welcome

Settings /control definition manager/operation defaults.Go into the tool paths you want to change,make your changes and click on the green check mark. After this any new file will have the changes. To update the current file you will have to reload your .mmd file under "files" in the operation manager.

I've always had trouble with that. I've come to accept it as a fact of life at this point. especially if the pocket shape is very irregular and/ or it has bosses all over. Usually playing with the step over and or pattern fixes it. sometimes I end up using (back to the basics)2-d contours with multi-passes and depth-cuts out of frustration as a quicker more predictable and flexible solution.(with construction geometry of course) However I can recommend the Freehand contour c-hook to clean up any little bits tool path left behind though. that works great too.

I meant to say abrasive, but not quite as bad as G10

It's a hard plastic too. likes to chip sometimes. like.....maybe acrylic.not quite as bad as G10. I believe it is also glass filled epoxy resin.

Another mystery solved. thanks,

I've been manually deleting them but wonder why they exist if for nothing. I guess you have them too John?

Anyone know what these are? What purpose do they have besides taking up space in my files and making things more confusing? I believe they are created every time I create a .stl file. Is there a way to escape making them if they have no purpose to me? They are everywhere! anyone else?

It works great for me too. Saves a lot of time for similar parts.

quote: I want one. [big Grin] Me too!

+1000 for MCX Backup. Saved my butt many times so far. I find it better to work on files locally and backup to the network. Most applications run better when the files are on your HD. -Mike

Awesome c-Hook, Thanks! -Mike

Thanks for the Link Chris. I do have a couple if these taps and thought about trying to use them in the machine but I would have to tap more than 3.5 deep in order for the threads to go all the way through. I don't have that much clearance under the part in the vice to do this so I would have to tap them all by hand. It's just a really ugly scenario. I'm thread milling it with the hokey setup I have now But I have to do a lot of manual editing and I'm trying to sneak up on the thread fit which requires countless attempts of toolpath editor changes, reposting and MDI editing . I think I will get it eventually though. I'll update when I finally beat it. Thanks for the help guys, -Mike

Because on the size of the minor diameter(.296) I need something no bigger than that.

saved my Arse twice this week!

Anyone out there Thread mill internal Acme threads before? I have to mill 3/8-12 through 1" of 17-4. Can't find much in the line of tools. it's been done here before I came but they used some crazy half a** offset lathe threading tool and an offset bushing with lots of manual editing to the NC and a lot of good luck during the setup it seems. Not a Pretty sight. Some how it worked which I am getting a little closer to understanding now but I was hoping there was a better tool out there for the job. Any Ideas? Thanks, -Mike

We use mostly Garr tools also. I will look into that series. I will also look into Hanita since I've had good luck with their tooling also. For this job I need 3/8 and 1/4 ball mills so I guess the indexable tooling is out but I will keep that in mind if we keep getting this kind of work. Thanks, -Mike