530,019 active members*
3,080 visitors online*
Register for free
Login
IndustryArena Forum > CAM Software > Mastercam > changing axis direction in post
Results 1 to 6 of 6
  1. #1
    Registered
    Join Date
    Aug 2010
    Posts
    0

    changing axis direction in post

    Hi, I am trying to modify a generic fanuc 5x post to work for a thermwood model 70 with 9100 controller. I need to change the direction of some of the axis, ie. z+ needs to be z- etc. My first thought was to change the wcs, tool plane and construction plane, either I get a rotating motion thats not possible or I get the same direction. Then I went into the machine def manager, and looked for a way to change it there, that didn't work.
    So does anyone know a way to reverse the sign on an axis in the post? Or another way besides manually find and replace to signs?
    thanks

  2. #2
    Registered
    Join Date
    Aug 2010
    Posts
    0
    Any suggestions on how this could be accomplished? Maybe there is something I missed in mastercam? How would you do this. Does everyone program 5 axis parts with wcs set to top?


    Also, I see some settings in the post referring to machine matrix. The reference doc doesn't say much about this or top mapping. Any thoughts?

  3. #3
    Flies Fast
    Join Date
    Dec 2008
    Posts
    2800
    Quote Originally Posted by thermgood View Post
    So does anyone know a way to reverse the sign on an axis in the post? Or another way besides manually find and replace to signs?
    There is a way, but .....

    Are you sure that the machine is configured that way ?
    or is it the way it has been programmed ?
    or is your interpetation of the movement in error ?

    Most machines have the Z along the spindle axis with Z+ going back up the spindle away from the table. So you must get the machine axes down pat 1st before thinking it's mastercam's machine definition that is at fault
    IMO, Z+ going towards the table is a big crash in the making.

    MDI the machine to go G0Z5. , now MDI in G0Z10.
    the spindle should move away from the table

    Progamming is always assumed that the tool is doing the moving,
    even if the table moves to the right, the tool is travelling in the X- direction, or has to be commanded to go in the X-

    Let us know if this misunderstanding is your problem, then we'll go to the next step in programming.

  4. #4
    Registered
    Join Date
    Aug 2010
    Posts
    0
    It's an old machine, the way it's setup is without any offsets. Machine 0. It doesn't have any offset tables. It could be changed to run in the normal direction, but the owner doesn't want to do that. There are years worth of programs written manually that run on this machine.
    The z and y are in the opposite directions than normal. It's a vertical machine c,a on the head x,y,z on the gantry, table is stationary.
    z- is up away from table, y- is moving toward the back of the machine, x+ is moving to the right. If I rotate the wcs 180 degrees about the x, things in mastercam point the right way.

  5. #5
    Registered
    Join Date
    Aug 2010
    Posts
    0
    For anyone thats interested, I found my answer in the Mastercam help file. There is a post in there that is well commented, and is set up to allow axis flipping. Basically it is to multiply the axis by -1.

    ex.
    xabs = xabs * -1

  6. #6

    Join Date
    Oct 2020
    Posts
    1

    Re: changing axis direction in post

    Where can I find this help file, I am in a similar position.

Similar Threads

  1. changing chucking direction
    By crazycnc in forum Fanuc
    Replies: 10
    Last Post: 06-25-2016, 07:08 AM
  2. Direction keeps changing
    By jjacstcy in forum DIY CNC Router Table Machines
    Replies: 14
    Last Post: 05-07-2011, 09:06 PM
  3. Mach newbie changing axis direction and lowering encoder count
    By toadjammer in forum Mach Software (ArtSoft software)
    Replies: 2
    Last Post: 12-29-2010, 10:45 PM
  4. Changing Direction of Internal Taper
    By dlall in forum Haas Lathes
    Replies: 5
    Last Post: 12-24-2009, 08:19 PM
  5. Help Please:- Stepper Not Changing Direction
    By audioandy1762 in forum General CNC Machine Related Electronics
    Replies: 1
    Last Post: 11-07-2007, 11:15 PM

Tags for this Thread

Posting Permissions

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