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Joels

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Everything posted by Joels

  1. Does anybody know of a good place to get custom tools made in California? by Los Angeles?
  2. Thank you all for all your help. I machined the part today and it came out good.
  3. this is funny. when i turn on sync in the original file it doesnt work. maybe i have to change the NCI file?
  4. Thank you both for your help. i see the file iskander made works good and as he said i dont have that much stuff in mastercam so we are linited. I do see that there might be a issue at the begining and end of the tool path. is there a way to make the begining and end overlap a bit?
  5. i put the file in the ftp server in the mc9 folder as watermaker op-1.mc9. I have a feeling that the small corners ar just too small
  6. I am trying to use a ruled surface to machine a aluminum part on a fadal mill. The problem is the part is getting gouged in the corners because the passes overlap. Does anybody know how to fix this problem?
  7. in the fadal i run it figures out the ipm based on the rpm of the spindle rotation speed. say 1/4-20 tap at 600 rpms would be 600/20=30 ipm at 900 rpm the feed would be 45 ipm and so on.
  8. Anybody know where i can get some 2d drawings of tools like end mills and drills?
  9. The machine is a Hass SL-1. It was one of the first machines Haas made. The turret tool holders are mounted through holes in the turret and screwed in from the back to hold them in place. I am running a CSS of 200 and a depth of cut of .100 a side. I changed the feedrate to .011 yesterday and the chatter went way down. The cycle time is about 30 minutes to machine this side of the part. I work in a small 3 machine shop and the lathe is 10 years old I keep informing them about the capabilities of a new lathe so someday they might buy one. I tried to use a 1 inch bbar with a PCD diamond insert to finish the part but it chattered too and i was only taking off .01 a side. right now i have the chuck jaws set at a low pressure so i will try to raise it up today and see what happens. I doo all the machining towards the spindle except the face off. The jaws are aluminum and i cut the to a depth of one inch so i am holding the part well. We could have a machine issue but i use a stick tool with the same insert to face (.05 depth of cut) and turn the OD and it works perfectno chatter or anything so thats why i thought the bbar had the wrong rake angle.
  10. Once i have all the perameters set i change the tool dia to get the proper threads. If you start with a tool dia that is oversize you will cut undersize threads once i have done this i change the tool dia smaller maybe by .005-.01 and threadmill the same part. as long as you dont move the part or change the depth you can threadmill the same part until you get the right size threads. once you have found the right numbers it comes out good all the time. I run the spindle at 2000-3000 rpm and a feed rate of 10 IPM
  11. i have a .031 radius on the insert and the bbar is in the turret as far as possible i have about a .5 clearance from the turret to the part at the deppest part.
  12. well i was thinking of buying a carbide bbar and using a zero degree angle. How does that sound?
  13. i was reading other posts on boring bar and someone suggested i use a positive rake instead of a negative rake so i will try that. I have the bar sticking out about 4 inches and i cant put it in any more. I didnt think sticking out 4 inches on a one inche dia bar would do this but it does. I am thinking of ordering a one inche carbide bar with a zero rake angle how does that sound? the biggest problem is i am using a old Hass lathe and the turret tooling is very limited.
  14. i have to engrave a arrow on a circular sloped surface. I have never done this so i was going to create single line geometry inside the arrow engineering designed and have the cutter follow the single line geometry. Will this work or am i doing it the hard way.
  15. Thanks for the information. I am using a CNMG 432 insert now. I did put CSS in the program on the machine but i had to use G96s150 to get the chatter to stop. I also have a feeling that the negitive 5 degree angle on the boring bar is not good should i be using a zero degree rake angle? I have also tried a PCD diamond insert and it chattered to so thats why i am thinking the rake angle is bad.
  16. I am using a 1 inch dia boring bar with a neg 5 deg rake and a diamond shape carbide chipbreaking insert. I am going approx 3.2 inches into the part. The problem is that it chatters like crazy. If i slow the rpm down to about 200 rpm it works ok. but the cycletime is way too long. I am cutting 6061 aluminum i will put the program in the lathe folder on the FTP site. I would appreciate any information. the file will be called watermaker.mc9
  17. i tried the suggestions but maybe i am missing something. I want to be able to clean up the entire side of the block that is being cut. if i have a .75 cutter and try to clean up one side of the 2 inch square the cutter wont clean the corners unless i create more geometry. I am trying to work off models from engineering and i dont want to create more geometry on certain cuts so i was wondering if anybody knew how to completely clean up a area without creating more geometry or leaving stock in corners.
  18. John can you explain better?
  19. If i have a square block say 2 inches and i want to shave half of the block on the top side down .100 so i have a step. If i was to use a .500 endmill to do this can it be done for a complete cleanup without modifying the geometry of the part?
  20. Motty I posted the completed file in the MC9 folder it is called watermaker rob.mc9
  21. Rob i am using you idea. The boss wants a glass finish so i have small step over like .005 i might have to go smaller to. I only have 3/6 ball endmill so that is why it will take so long. You had a great idea that i didnt know i could do with level one mill. Thank you very much as you have given me the ability to get this part done by the deadline.
  22. I am using a file Rob modified for me but it takes a long time to use a ball end mill. Does anybody have any other ideas?
  23. I just want to say i really appreciate everyone here and for all the help i have received. this board makes a big difference when i use mastercam. thank you all
  24. i took a short look at it Rob and it looks great. I didnt know MC could do that. I still have a lot to learn. Thanks alot

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