Free 186 More Best Homemade Tools eBook:  
Get tool plans

User Tag List

Results 1 to 8 of 8

Thread: CNC routing a stack of laminate - GIF

  1. #1
    Supporting Member Altair's Avatar
    Join Date
    Aug 2013
    Posts
    12,020
    Thanks
    1,365
    Thanked 30,299 Times in 9,998 Posts

    CNC routing a stack of laminate - GIF


    186 More Best Homemade Tools eBook

  2. The Following User Says Thank You to Altair For This Useful Post:

    nova_robotics (Mar 19, 2022)

  3. #2
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    11,622
    Thanks
    2,178
    Thanked 9,118 Times in 4,364 Posts

    Frank S's Tools
    I Guess it wasn't cut right the first time

    2,000+ Tool Plans
    Never try to tell me it can't be done
    When I have to paint I use KBS products

  4. #3
    Supporting Member
    Join Date
    Sep 2018
    Posts
    2,346
    Thanks
    11,132
    Thanked 1,219 Times in 664 Posts

    nova_robotics's Tools
    Oh that's nice. I have a little 2 ft x 4 ft router table and when I try to do cuts deeper than a few mm it chatters like crazy. But x-y-z is on the head. This one has the end mill supported at both ends so it doesn't chatter, and the workpiece moves. That's pretty good.

  5. #4
    Supporting Member Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    5,334
    Thanks
    7,044
    Thanked 3,011 Times in 1,900 Posts

    Toolmaker51's Tools
    Quote Originally Posted by nova_robotics View Post
    Oh that's nice. I have a little 2 ft x 4 ft router table and when I try to do cuts deeper than a few mm it chatters like crazy. But x-y-z is on the head. This one has the end mill supported at both ends so it doesn't chatter, and the workpiece moves. That's pretty good.
    Likely has extraordinarily higher RPM range, and swarf isn't helical, so that's probably a D-bit cutter.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  6. The Following User Says Thank You to Toolmaker51 For This Useful Post:

    nova_robotics (Mar 19, 2022)

  7. #5
    Supporting Member
    Join Date
    Sep 2018
    Posts
    2,346
    Thanks
    11,132
    Thanked 1,219 Times in 664 Posts

    nova_robotics's Tools
    Quote Originally Posted by Toolmaker51 View Post
    Likely has extraordinarily higher RPM range, and swarf isn't helical, so that's probably a D-bit cutter.
    I'm just a newbie and have never used a d-bit cutter. I tried out a bunch of HSS and carbide on plastic (acetal), but just out of the thirty oddball small end mills or so I had on hand. I'm using carbides right now, not for any reason other than it worked slightly better than the HSS end mills I found in the junk drawer. I have a water cooled 2HP spindle on my little router and I can't quite figure out how to get the inverter to work properly, so it's just maxed out all the time at 24,000 RPM. I'm cutting acetal and it's a little fast. The chips come off pretty hot. You figure a d-bit would be better? I'm slightly worried about balance because the thing is running at a kajillion RPMs.

  8. #6
    Supporting Member Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    5,334
    Thanks
    7,044
    Thanked 3,011 Times in 1,900 Posts

    Toolmaker51's Tools
    Generally, carbide milling cutters are slightly sharper than HSS, partly because higher density. Solid D-bits are available in either material, larger diameters are cemented (brazed).

    D-bits are de rigueur for engraving. depending on diameter-material-depth. RPMs can exceed 24k. They are typically tapered and ball end.
    A D-bit is technically 100% clearance, providing straightest, shortest chip ejection compared to helical, but restricts maximum depths. As depth increases, the need of efficient chip ejection increases at greater ratio because volume and heat retention. Thermo-sets are less problematic than thermo-plastics.

    The balance issue is counteracted by mass in the drive, especially round belt types of full size pantographs.
    I'd suspect armature and distance between bearings is good for any bits your spindle (and collets) accommodate.
    Last edited by Toolmaker51; Mar 20, 2022 at 10:06 AM.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  9. The Following User Says Thank You to Toolmaker51 For This Useful Post:

    nova_robotics (Mar 20, 2022)

  10. #7
    Supporting Member schuylergrace's Avatar
    Join Date
    Sep 2020
    Location
    Mesa, Arizona
    Posts
    388
    Thanks
    302
    Thanked 181 Times in 116 Posts
    [QUOTE=Toolmaker51;199850]Generally, carbide milling cutters are slightly sharper than HSS, partly because higher density. Solid D-bits are available in either material, larger diameters are cemented (brazed).

    I've always understood HSS cutters are sharper than carbide. But carbide tooling is harder, so you can (and should) increase the depth of cut and/or surface speed, and carbide tooling holds a decent edge longer. On the lathe, I sometimes switch over to HSS from carbide on a final skim pass to make the finish nicer. Of course, that could be because I'm on the bottom end of the recommended power, speed, and material removal ranges for carbide cutters and right in the sweet spot for HSS. On the wood lathe, too, carbide cutters give a reasonably good finish, while a sharp HSS tool can give a really fine finish.

    Am I misunderstanding or misremembering something? It could easily be I've got all this confused...I mean, there was this one time I thought I was wrong, but it turned out I was mistaken. (buh-dum-bump!)

    For topical application, only. Not to be taken internally or used in com-
    bination with other drugs or alcohol, except as directed by your shaman.
    Do not operate heavy equipment, unless you actually know how to.



  11. #8
    Supporting Member Toolmaker51's Avatar
    Join Date
    Feb 2016
    Location
    Midwest USA
    Posts
    5,334
    Thanks
    7,044
    Thanked 3,011 Times in 1,900 Posts

    Toolmaker51's Tools
    I did mis-phrase statement of carbide vs HSS.
    HSS starts out sharper, carbide will normally maintain edge longer; but when it starts to chip the decline is rapid. This is noticeable in cutters that actually 'cut', such as endmillls.

    Razor edged carbide turning tools are a minority, it doesn't find simultaneous side and radial loads a kindly environment. That is a better way to observe how they work removing material; HSS cuts, carbide pushes.



    2,000+ Tool Plans
    Last edited by Toolmaker51; Mar 24, 2022 at 06:42 AM.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •