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razmosis13-Aquamarine
13-Aquamarine
January 9, 2014
Question

threadmilling in creo 2.0

  • January 9, 2014
  • 8 replies
  • 5197 views

I am looking for help on threadmilling posts in Creo. The threadmilling sequence programming seems pretty straight forward. However, I find that when I post process a threadmilling sequence, at least half the time I get a line of code that starts with G3G41 that errors out the machine.

Example:

G3G41X-2.068Y-1.25Z-1.35I.0376J.0137F7.5D37

My way around this is to copy / create several sequences that increase in thread diameter, rather than using the parameters in which you input the thread diameter and the number of profile cuts to get there (the way it should be). Doing this the machine seemingly runs the thread great.

Curious if there are any thoughts on this?

Thanks!


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    8 replies

    J
    JasonPensack1-Visitor
    1-Visitor
    January 10, 2014

    Do you have a lead in set? I usually insert a value in the "Lead Radius" & "Tangent Lead Step" parameters. This will allow the cutter comp to activate on a linear move and then arc into the cut. On most if not all machines you can't activate cutter comp on an arc.

    S
    SteveLucas1-Visitor
    1-Visitor
    January 10, 2014

    Matt I run the threadmill all the time with NPT threadmills. works great!! As Jason said it might have something to do with the lead in leadout and cutter comp.

    Here are the parameters I run I particularly like the enter and exit oon the hole axis. that used to be a pain to do but now it's just a parameter selectionthreadmilling+NPT.JPG

    here is what the code looks like at the start no alarms with this.

    threadmill+tap.JPG

    R
    razmosis13-AquamarineAuthor
    13-Aquamarine
    February 2, 2015

    Steve,

    I noticed that you said you use threadmilling (Creo2.0 at the time) for NPT threads. I am looking at doing a 1-11.5 and a 2-11.5 NPT with a multithread mill. How are you spec'ing the tool diameter and the thread diameter? There is not a tapered threadmill option in 2.

    As long as the insert is long enough I should not have to worry about making an interrupted cut.

    I think I can get the path from the manufacturer's software, but would rather incorporate it in Creo if I can.

    Thanks

    Matt

    R
    razmosis13-AquamarineAuthor
    13-Aquamarine
    January 15, 2014

    I do use the lead in / lead out and enter hole from axis parameters. Everything appears to work on the screen as I would like to see it. Normally, I do not use cutcom on the initial operation - but post a second operation with cutcom on that performs only the last pass of each thread. Ironically, I am having trouble trying to get a post created that mimics the error in the code, but I am sure it will come up again. I wonder if is possible that the post-processor is the issue? When I see it again, I will post what I find out.

    Thanks for the help.

    O
    Olga1-Visitor
    1-Visitor
    February 5, 2015

    http://communities.ptc.com/thread/59436?tstart=0

    My question is - milling tapered thread. I can send the output file. In the correction tool diameter to a predetermined value of wear. But working through it? NO!

    G41 is incorrect on the straight segments

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