RT Machine Co Anver Laguna
Post a Response Subscribe Guidelines

CNC

You are not logged in. [ Login ] Why log in
(NOTE: Login is not required to post)

Large custom knife for 5"Tx3"D arched heavy crown moulding? Laguna SSII SUV

4/21/23       
Tkottke Member

We are looking to quote a job that has a very large profile to cut in an arch. We have a Laguna SSII SUV CNC that should have the height I need. I need to know what the limits are of custom knife profiles when it comes to machining tall profiles.

Also, who would you recommend getting this custom cutter from?

4/21/23       #2: Large custom knife for 5"Tx3&q ...
Tom Gardiner

Is this a one off job? You will likely spend something on the order of $1K or more on the custom cutter head. Unless you are doing a thousand feet or so you would be better off routing the moulding with a two rail sweep and a bullnose bit. There will be hand sanding and it will take longer.

4/22/23       #3: Large custom knife for 5"Tx3&q ...
BH Davis  Member

Website: http://www.bhdavis.net
 Unless you have a 5-axis machine so you can run with the cutter head axis parallel to the face of the moulding I'd strongly advise against doing this with a single knife. I wouldn't want to be in the same building, much less the same room, when a knife that deep was spinning.

You would be much better off to split the moulding into upper and lower halves, profile each half independently and then glue the two layers together.

Plus, I'd also ask how you are making up the blank. If you are not doing a brick laid construction, but rather just cutting a mild arc out of a single wide board, you are going to run into serious end grain on one end of the blank. This too can raise concerns with both tear out and resultant knife breakage. All becomes less safe of course with a dangerously deep set of knives.

BH Davis
4/23/23       #4: Large custom knife for 5"Tx3&q ...
Mike

Are you looking for a shaper cutter head that will hold your own corrugated knife steel? I have cuts many profiles on hardwood using these knife holders. Mine have a 3/4" shank and have been worth their weight in gold over the years. I will post a picture of the body. It will also accept steel longer than the body. Sometimes it takes two of these cutters if the moulding is that large. I could provide an example if you are interested in the holder.


View higher quality, full size image (1008 X 756)

4/24/23       #5: Large custom knife for 5"Tx3&q ...
Mike

Okay, now that I'm back at work, I was able to take a picture of the moulding I was referring to in the sample room.


View higher quality, full size image (4032 X 3024)

4/25/23       #6: Large custom knife for 5"Tx3&q ...
Bill

That can be cut on an arch molder. If it is a one off it does not make sense.
For a sanity check I would have art for every day quote it.

4/25/23       #7: Large custom knife for 5"Tx3&q ...
Mike

BH had a good point. I recently did some rift cut walnut crown. Since you can't buy rift in walnut, we had to bricklay the pieces. It was 9.75" tall. We made two pieces and glued them together. Came out beautiful. That crown was all done with ball end mills and flat tools. Took a long time on the machine, but minimal sanding was required before finish. It was for a casino, so they had the money and it was very profitable.

4/26/23       #8: Large custom knife for 5"Tx3&q ...
Tom Gardiner

I would do as BH suggested. Bricklayed and in three separate moulding knives. Top portion with the ogee and bead, mid ovolo, lower cove. Do the lower cove with a moulding toolpath and ballnose bits. The other sections cannot be done this way because of undercuts.

4/26/23       #9: Large custom knife for 5"Tx3&q ...
Mike

Back to the original poster. I am still not sure what the heck he is looking for. Can you post the profile so we can try to answer adequately?

4/27/23       #10: Large custom knife for 5"Tx3&q ...
Tkottke Member

I want to thank everyone for their input/experiences on this topic. For my specific situation, I think I can pre-cut the "layers" and make glue up and finish with a ball mill as it is a tall, sweeping cove I need to create, not an intricate shape.

All the responses were beneficial.

Thanks!


Post a Response
  • Notify me of responses to this thread
  • Subscribe to email updates on this Forum
    • To receive email notification of additions to this forum thread,
    enter your name and email address, and then click the
    "Keep Me Posted" button below.

    Please Note: If you have posted a message or response,
    do not submit this request ... you are already signed up
    to receive notification!
    Your Name:
    E-Mail Address:
    Enter the correct numbers into the field below:
     

    Date of your Birth:



    Return to top of page

    Buy & Sell Exchanges | Forums | Galleries | Site Map

    FORUM GUIDELINES: Please review the guidelines below before posting at WOODWEB's Interactive Message Boards (return to top)

  • WOODWEB is a professional industrial woodworking site. Hobbyist and homeowner woodworking questions are inappropriate.
  • Messages should be kept reasonably short and on topic, relating to the focus of the forum. Responses should relate to the original question.
  • A valid email return address must be included with each message.
  • Advertising is inappropriate. The only exceptions are the Classified Ads Exchange, Machinery Exchange, Lumber Exchange, and Job Opportunities and Services Exchange. When posting listings in these areas, review the posting instructions carefully.
  • Subject lines may be edited for length and clarity.
  • "Cross posting" is not permitted. Choose the best forum for your question, and post your question at one forum only.
  • Messages requesting private responses will be removed - Forums are designed to provide information and assistance for all of our visitors. Private response requests are appropriate at WOODWEB's Exchanges and Job Opportunities and Services.
  • Messages that accuse businesses or individuals of alleged negative actions or behavior are inappropriate since WOODWEB is unable to verify or substantiate the claims.
  • Posts with the intent of soliciting answers to surveys are not appropriate. Contact WOODWEB for more information on initiating a survey.
  • Excessive forum participation by an individual upsets the balance of a healthy forum atmosphere. Individuals who excessively post responses containing marginal content will be considered repeat forum abusers.
  • Responses that initiate or support inappropriate and off-topic discussion of general politics detract from the professional woodworking focus of WOODWEB, and will be removed.
  • Participants are encouraged to use their real name when posting. Intentionally using another persons name is prohibited, and posts of this nature will be removed at WOODWEB's discretion.
  • Comments, questions, or criticisms regarding Forum policies should be directed to WOODWEB's Systems Administrator
    (return to top).

    Carefully review your message before clicking on the "Send Message" button - you will not be able to revise the message once it has been sent.

    You will be notified of responses to the message(s) you posted via email. Be sure to enter your email address correctly.

    WOODWEB's forums are a highly regarded resource for professional woodworkers. Messages and responses that are crafted in a professional and civil manner strengthen this resource. Messages that do not reflect a professional tone reduce the value of our forums.

    Messages are inappropriate when their content: is deemed libelous in nature or is based on rumor, fails to meet basic standards of decorum, contains blatant advertising or inappropriate emphasis on self promotion (return to top).

    Libel:   Posts which defame an individual or organization, or employ a tone which can be viewed as malicious in nature. Words, pictures, or cartoons which expose a person or organization to public hatred, shame, disgrace, or ridicule, or induce an ill opinion of a person or organization, are libelous.

    Improper Decorum:   Posts which are profane, inciting, disrespectful or uncivil in tone, or maliciously worded. This also includes the venting of unsubstantiated opinions. Such messages do little to illuminate a given topic, and often have the opposite effect. Constructive criticism is acceptable (return to top).

    Advertising:   The purpose of WOODWEB Forums is to provide answers, not an advertising venue. Companies participating in a Forum discussion should provide specific answers to posted questions. WOODWEB suggests that businesses include an appropriately crafted signature in order to identify their company. A well meaning post that seems to be on-topic but contains a product reference may do your business more harm than good in the Forum environment. Forum users may perceive your references to specific products as unsolicited advertising (spam) and consciously avoid your web site or services. A well-crafted signature is an appropriate way to advertise your services that will not offend potential customers. Signatures should be limited to 4-6 lines, and may contain information that identifies the type of business you're in, your URL and email address (return to top).

    Repeated Forum Abuse: Forum participants who repeatedly fail to follow WOODWEB's Forum Guidelines may encounter difficulty when attempting to post messages.

    There are often situations when the original message asks for opinions: "What is the best widget for my type of shop?". To a certain extent, the person posting the message is responsible for including specific questions within the message. An open ended question (like the one above) invites responses that may read as sales pitches. WOODWEB suggests that companies responding to such a question provide detailed and substantive replies rather than responses that read as a one-sided product promotion. It has been WOODWEB's experience that substantive responses are held in higher regard by our readers (return to top).

    The staff of WOODWEB assume no responsibility for the accuracy, content, or outcome of any posting transmitted at WOODWEB's Message Boards. Participants should undertake the use of machinery, materials and methods discussed at WOODWEB's Message Boards after considerate evaluation, and at their own risk. WOODWEB reserves the right to delete any messages it deems inappropriate. (return to top)



    • Forum Posting Help
    Your Name The name you enter in this field will be the name that appears with your post or response (return to form).
    Your Website Personal or business website links must point to the author's website. Inappropriate links will be removed without notice, and at WOODWEB's sole discretion. WOODWEB reserves the right to delete any messages with links it deems inappropriate. (return to form)
    E-Mail Address Your e-mail address will not be publicly viewable. Forum participants will be able to contact you using a contact link (included with your post) that is substituted for your actual address. You must include a valid email address in this field. (return to form)
    Subject Subject may be edited for length and clarity. Subject lines should provide an indication of the content of your post. (return to form)
    Thread Related Link and Image Guidelines Thread Related Links posted at WOODWEB's Forums and Exchanges should point to locations that provide supporting information for the topic being discussed in the current message thread. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related Link that directs visitors to an area with inappropriate content will be removed. WOODWEB reserves the right to delete any messages with links or images it deems inappropriate. (return to form)
    Thread Related File Uploads Thread Related Files posted at WOODWEB's Forums and Exchanges should provide supporting information for the topic being discussed in the current message thread. Video Files: acceptable video formats are: .MOV .AVI .WMV .MPEG .MPG .MP4 (Image Upload Tips)   If you encounter any difficulty when uploading video files, E-mail WOODWEB for assistance. The purpose of WOODWEB Forums is to provide answers, not to serve as an advertising venue. A Thread Related File that contains inappropriate content will be removed, and uploaded files that are not directly related to the message thread will be removed. WOODWEB reserves the right to delete any messages with links, files, or images it deems inappropriate. (return to form)
    Related Information:
    Products: Computer Software
    Knowledge Base: Computerization

    Recent Threads at all Forums

    Sponsors
    • Scarlett Machinery Inc.
      New and Used CNC Routers and Used Woodworking Machinery, for Operations Ranging From Small Woodworking Shops to Large Progressive Manufacturing Plants
    • American National Knife
      Manufacturer of HSS and Carbide Tipped Woodworking Knife Sets for Planers, Jointers, Molders, Shapers
    • Country Saw & Knife
      Complete Sharpening Services for Wood and Metal Saw Blades, Jointer Knives, and Bandsaw Blades
    • Industrial CNC
      Affordable, Easy, Industrial Grade CNC Routers for Woodworking and Cabinetmaking - Free Lifetime Support
    • Charles G.G. Schmidt Co.
      Tooling for Shapers, Moulders, Tenoners, Planers and Routers
    • Professional Machinery Group
      New and Used Machinery Serving the Needs of the Professional Woodworker
    • Rangate
      Woodworking Machinery, Supplies and Knowledge
    • Thermwood Corporation
      Computer Numerical Control (CNC) Routers and Accessories
    • ETK International
      New and Used Woodworking Machinery, Spare Parts and Superior Service
    • Vexor Custom Woodworking Tools, Inc.
      Custom and Standard Router Bits, Shaper Cutters, Profile Knives, Multi Profile Insert Tooling and More
    • Biesse America
      Woodworking Machinery - Machining Centers, Edge Banders, Feeders/Stackers, Panel Sizing Centers
    • Carter Products
      Band Saw Guides, Blades, Wheels, Tires, Line Lasers and 2D Projectors, Wide Belt Sanding Accessories, Vacuum Holding Systems and More
    • Colonial Saw
      North American Supplier of Striebig Panel Saws, Lamello Specialty Tools and a Wide Range of Saw and Tool Grinding Machinery

    Become a Sponsor today!