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Recent content by M. Roberts

  1. M

    Helical boring/grinding routine in Mastercam 2018

    Emgo, unfortunately, I have not, but that would work as well. Dodgin; that is an interesting solution....I will have to give that a shot!! Thank you... Mark
  2. M

    Helical boring/grinding routine in Mastercam 2018

    Mtndew, I see the feed out option for the drilling, but I don't think that it will work what I am doing...any other thoughts?
  3. M

    Helical boring/grinding routine in Mastercam 2018

    Mtndew, The 2018 version only allows for a single direction, up to the finish pass, where you have the option of feeding in or out...I want to helix down, step over my 0.0002", then helix up...repeat....
  4. M

    Helical boring/grinding routine in Mastercam 2018

    Hello. I am attempting to size a series of holes via grinding. Specifically, I am using the helical boring cycle in MC. The holes start at 0.280" in diameter, and finish at 0.315"...way too much to take in a single cut, so I am stepping out in 0.0002" increments. The issue is that I can't...
  5. M

    Deep hole grinding

    Good morning. On a path to confirm the taper and the surface finish of the holes. eKretz, thank you for repeating that there is no Z movement; I feel that if there was, it would produce a "bell mouth" on both the entry and exit of the hole. And the tool in the pic is of one of the 80grit...
  6. M

    Deep hole grinding

    Good morning. Thank you for all of the feedback. I am of the same mindset...the set-up is pretty solid...I do not think that deflection is the issue...but what is the root cause. And I am sad to say that I have not personally checked the parts, or ran the parts, but I had someone do it under...
  7. M

    Deep hole grinding

    Attached is the picture, somewhat staged. Shows the part, the tool in the holder with the typical projection.....
  8. M

    Deep hole grinding

    Good morning. In the beginning of this project, the guys did try to use an air spindle, but there were issues. One of which was that the spindle didn't have enough torque...second, they were unable to execute a tool change due to the air line. The grinding pin/nib...0.250" carbide...
  9. M

    Deep hole grinding

    Hello eKretz, Thank you for the reply. I was trying to avoid the "Christmas tree effect" of the hole, that one would expect to see if you stepped down thru the hole...the tool would definitely preferentially wear....a full depth cut should (famous last words) wear evenly. The holes are ending...
  10. M

    Deep hole grinding

    Buck, Good morning. Perhaps it is that I haven't had my coffee yet, but I do not understand your reply...can you elaborate? Thanks, Mark
  11. M

    Deep hole grinding

    Hello all. Its been a while since I have been on, hope all is well. I am working on a project that I am looking for a little advise on. The material is silicon carbide based ceramic, 0.625" thick. The task is to open up pre-existing holes from 0.285" diameter to a final dimension of 0.315"...
  12. M

    long LOC diamond grinding NIBS

    Hello all. I am in the market for diamond grinding NIBS; 0.250" diameter x 0.700" length of abrasive...preferrably metal bond, or VIT bond; 100 and 220 grit for a wet grinding operation...it seems as if the LOC seems to be the issue; does anyone have any suggestions? Thanks, Mark
  13. M

    Mist collector placement

    Ager, We have small Microair units on our surface grinders; they are mounted from the ceiling with pickup points on the wheel housing, and dowd stream of the wheel itself. The drain from the unit drains back into the coolant tank.
  14. M

    .008" Slitting Saw-Student needs help!

    Hello, have you thought of stacking your slitting saws with a spacer in between?
  15. M

    24" x 48" granite surface plate AND wtb

    We are located in Delaware...we have a 6' x 7' x 18" thick grey Starrett surface plate that I think that we are trying to find a home for...
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