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Mjölnir last won the day on May 1 2020

Mjölnir had the most liked content!

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  1. customer allowed us to blast with coarse steel shot which easily does the job.
  2. yes. the unit for F10, in inches, is .00001 (.0001 for metric). so for a .03" retract you'll set F10 to 3000.
  3. agreed. has been broken for quite a while now, or at least is unreliable. i always advise people to use the planes manager where it works without fail.
  4. yep. I've done it (chip break tapping) with Siemens 840D and Heidenhain iTNC 30 as well. the only other controls i've used in the last several years worth mentioning are Fanuc and Mitsubishi and they, the ones I've used, don't have that functionality though most of the Fanuc's do peck tap with full retracts.
  5. "Q" = depth of cut (peck amount) "I0" = deep hole tapping (retract to R between between pecks) "I1" = high speed tapping amount to retract set in parameter F10.
  6. see your mazak eia/iso documentation for high speed deep hole tapping (G84.2 / G84.3 (option)) and pay very careful attention to the machine parameters. on a smoothg or nexus control parameter F10 is what you're looking for. but don't take my word for it, see the docs for your machine.
  7. yes, can run a reamer through them. the holes were drilled from the opposite side so the burrs are standing. in hindsight there could have been stock left on the tapered walls, the holes drilled, the walls then finished pushing the burrs into the holes then removing them by plunging an endmill into the holes. that's what was done in the pockets in the back (the part has equal wall thickness all around) to avoid starting holes in tapered walls. but that would add another operation. i've already got three machines working on the job and management is screaming to get these done by may 15. 2019! adding another operation and maybe another machine would be met with much resistance from above. if we had 5ax our customer would allow us to drill perpendicular to the surfaces eliminating most of the burrs. looks like my only option so far is to say fuk it and hand it to someone else to deal with. or maybe these? think they'd work in this application or would the tool blow up on the second hole? https://cogsdill.com/products/deburring-tools/burraway/
  8. any ideas on how to go about deburring the holes through the tapered walls without it taking a month of sundays? holes are .094", material 304 stainless. there are 250 holes through tapered walls on each part and we're making 75 of them.
  9. i've also in situations like this, transformed / created wireframe geometry on tool center and use for example a 2d swept with a zero or .0001 dia tool.
  10. a number of mastercam versions ago (x6 7 or 8 maybe) parameters wouldn't stay set when switching pages unless you hit the blue plus before leaving a page, and it became habit. now it's time to kick that habit. muchas gracias!
  11. since using Mastercam 2019 i've been having a problem with surface selection creating new groups and reseting stock to leave to defaults. happens seeming randomly after changing parameters and regenerating toolpaths. initially the drive and check surfs were defined with the lower groups in the photo with .001 / 0 stock. they were moved to the new groups at the top on their own by the software during regen. is this a new feature or a bug, and is there a workaround to prevent it from happening?
  12. we're machining the bars in a free state and had mostly machined the bow out them. when sizing them by taking equal stock off opposite sides, they bowed twice what they originally were. my stainless experience revolves mostly around injection molds and that's usually 420 which is literally fun to hardmill, it comes out gorgeous. are any of the 300 series stainless steels considered not "low grade"?
  13. that crossed my mind briefly, it would take forever on parts this long. we do have some high speed corncob rougher's in the tool cabinet. we've been using bull nosed carbide as sharp corner tools break down down quickly. i suppose at this point it can't get any worse using high speed tools. or can it?
  14. we've got some 1" x 1" x 54" 303 stainless bars that finish at approx 3/4 x 7/8 and has a 3/8 slot down the middle depth about half way through. bars came stress relieved and bowed about .100. we've been trying to flip flop them around machining as equal stock as possible on all sides. we got them close to reasonably flat, i'd be happy with .03" at this point, and they just popped to about .2" bow. i'm beginning to think this isn't even possible with this material but i've been told they've been made before, before i started here. even my shop manager who was here at that time is stumped. any ideas?
  15. i combed through that and found nothing. thanks anyway. I ended up setting the levels to the level with the geometry on it in that menu (grey exclamation point in the mach def manager), saved the definition, and the geometry disappeared. case closed.

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