Results 1 to 2 of 2

Thread: How to do finishing passes???

  1. #1
    Registered
    Join Date
    Dec 2010
    Location
    USA
    Posts
    23
    Downloads
    0
    Uploads
    0

    How to do finishing passes???

    Right now I have to make .05in passes through mdf in order to get very good accuracy. The problem with this is that it takes a tremendous amount of time in order to machine the piece. If I set it to a larger pass depth like .125in (I am using an 1/8in bit) then it machines the piece faster but the accuracy suffers a little bit.

    So I am wondering is there a way in cambam to leave material and then cut it away in one big final pass.

    Example say I wanted to cut a 1in x 1in square out of .25in thick mdf.

    Right now I would set the machine up and cambam would have the machine make five .05in passes.

    Wouldn't it be faster if the machine cut a 1.01in x 1.01in square with deeper passes and then had the machine shave off that last .01in with a finishing pass?


    ______________

    How would this be done for perimeter cuts and if possible how would it be done for internal pockets within cambam?


  2. #2
    Registered
    Join Date
    Dec 2009
    Location
    USA
    Posts
    156
    Downloads
    0
    Uploads
    0
    What I do is the roughing pass with a larger tool (set roughingAllowance) in the MOP, then finish pass at full depth or at least greater increments, possibly with a smaller tool. You can remove material for pockets more rapidly by drilling if that's feasible for your part, followed by a finish pass.

    RoughingAllowance works for both pockets and profiles (and a negative allowance gives you overcuts).


Similar Threads

  1. G76 Number of Passes
    By eliot15 in forum G-Code Programing
    Replies: 13
    Last Post: 04-08-2011, 07:51 PM
  2. finishing passes of G76
    By sinha_nsit in forum Fanuc
    Replies: 7
    Last Post: 12-23-2010, 02:23 PM
  3. Problem- Roughing Passes Exceeding Finishing Passes
    By phoodieman in forum Mastercam
    Replies: 2
    Last Post: 03-01-2009, 07:21 AM
  4. First pass different to subsequent passes
    By stugrey in forum DIY CNC Router Table Machines
    Replies: 1
    Last Post: 12-12-2008, 10:53 AM
  5. Need Help!- Can't get multiple passes in v3.0
    By Vogavt in forum LazyCam
    Replies: 2
    Last Post: 01-26-2008, 04:57 PM

Posting Permissions


 


About CNCzone.com

    We are the largest and most active discussion forum from DIY CNC Machines to the Cad/Cam software to run them. The site is 100% free to join and use, so join today!

Follow us on

Facebook Dribbble RSS Feed


Search Engine Friendly URLs by vBSEO ©2011, Crawlability, Inc.