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  1. #1
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    Default Rest Milling

    I have this small aluminum sign job and can't get it to work with rest milling V28

    Keeps crashing or takes forever to compute where I have to cancel which then crashes the program.

    I tried using simple 2axis pocketing with 2 pocket routine.

    Depth would be .100" .

    I give up. What am I doing wrong.

    This needs to be under 2 hour job

    Rob

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    Default Re: Rest Milling

    Can you supply the text before you broke it down to lines and arcs ?
    That's where something went wrong.
    If not,a way around it is to pick each entity one at a time,single picking,,in other words,no window picking



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    Default Re: Rest Milling

    Quote Originally Posted by jrmach View Post
    Can you supply the text before you broke it down to lines and arcs ?
    That's where something went wrong.
    If not,a way around it is to pick each entity one at a time,single picking,,in other words,no window picking
    That's what was given to me by the customer. Not drawn in BC
    I'll try and see if that works.
    I just did window pick to pick all of it at once.

    Rob



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    Default Re: Rest Milling

    Quote Originally Posted by jrmach View Post
    Can you supply the text before you broke it down to lines and arcs ?
    That's where something went wrong.
    If not,a way around it is to pick each entity one at a time,single picking,,in other words,no window picking
    Well that didn't work, after 30 minutes compute time
    It did the top letters, erased half the second row and butchered the third row.

    I guess bobcad cant handle little letters.

    Rob



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    Default Re: Rest Milling

    Hi Rob

    Well, I didn`t have any trouble using a simple 2 axis pocket on your .DXF file, to try and replicate your issue I also did a "box selection" of all the text at once. I have just used a simple pocket strategy without any finish profile as an example, feel free to alter as you require

    I set the spindle speed to 10,000rpm @ 800mm/m feed rate (About 31.5 ipm) with a 1/16" 2 flute cutter programmed in with the DOC set to 4 passes @ 0.635mm (About 0.025"), ramp in lead set at 200mm/m (About 7.0 ipm).

    These are just a guess as I have no idea what your machine is capable of rpm wise but that should work OK.

    Anyway, here are a couple of images of the toolpath and the simulated program, it worked fine and took abot 2 seconds to compute the toolpath, with the numbers I put if the Setup Sheet estimated time is 39 minutes so should be some $$$ in it for you



    Also attached on a Zip file is the actual program that I created from your .DXF file, hope it works for you



    Regards
    Rob

    Attached Thumbnails Attached Thumbnails Rest Milling-text-toolpath-jpg   Rest Milling-text-simulation-image-jpg  
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    Default Re: Rest Milling

    Quote Originally Posted by The Engine Guy View Post
    Hi Rob

    Well, I didn`t have any trouble using a simple 2 axis pocket on your .DXF file, to try and replicate your issue I also did a "box selection" of all the text at once. I have just used a simple pocket strategy without any finish profile as an example, feel free to alter as you require

    I set the spindle speed to 10,000rpm @ 800mm/m feed rate (About 31.5 ipm) with a 1/16" 2 flute cutter programmed in with the DOC set to 4 passes @ 0.635mm (About 0.025"), ramp in lead set at 200mm/m (About 7.0 ipm).

    These are just a guess as I have no idea what your machine is capable of rpm wise but that should work OK.

    Anyway, here are a couple of images of the toolpath and the simulated program, it worked fine and took abot 2 seconds to compute the toolpath, with the numbers I put if the Setup Sheet estimated time is 39 minutes so should be some $$$ in it for you



    Also attached on a Zip file is the actual program that I created from your .DXF file, hope it works for you



    Regards
    Rob
    Oh Man, I left out the detail that the letters are embossed. Hence why the tread is called Rest Milling. I didn't have any problem engraving either.
    Embossed letters with 1/16 mill will take all day. Reason needing rest milling.

    Rob



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    Default Re: Rest Milling

    Oh man,,am I going to have to make a video,,,lol
    I should of saved the sample file I did yesterday,,ugh,,,I will try to gve yu a good file by tomorrow,,,btw,yes I was doing it as an emboss

    "I guess bobcad cant handle little letters."
    to be fair,this ain't a BoB issue,,,it's a crappy file you got,,,,do entity summary,,,



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    Default Re: Rest Milling

    Still details for you to do,but I believe this will get you going
    advanced rough with .500 em then 3 rest rough routines .250,.125,.0625
    That is embossed,,from here you need to pocket the inside of letters
    and you might change the machining tolerance back,I raised it so it would compute faster for me

    Attached Thumbnails Attached Thumbnails Rest Milling-sign-jpg  


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    Default Re: Rest Milling

    PM me with number or e-mail to get file,,,to large to upload here

    here you can see the simulation better

    Attached Thumbnails Attached Thumbnails Rest Milling-sign-2-jpg  


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    Default Re: Rest Milling

    Since I can't load the file here,here is a screen shot of the tool paths for those that are interested

    Attached Thumbnails Attached Thumbnails Rest Milling-4-jpg   Rest Milling-3-jpg   Rest Milling-2-jpg   Rest Milling-1-jpg  



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    Default Re: Rest Milling

    got the file to load

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    Default Re: Rest Milling

    Well that works. I guess my problem was using pocketing to try to do this. Being a newbie, I don't have advanced rough. Live and learn
    Thank you. Good Job.
    and the other thing is I don't have the Pro version V28 with advanced rough.


    Rob



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    Default Re: Rest Milling

    Then skin the cat this way
    if it was me,I would space the letters so they are no closer than .126 from each other at the closest point.Hence that is why I picked a .120 EM for your file as it is.

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    Default Re: Rest Milling

    Quote Originally Posted by jrmach View Post
    Then skin the cat this way
    if it was me,I would space the letters so they are no closer than .126 from each other at the closest point.Hence that is why I picked a .120 EM for your file as it is.
    This has been a interesting exercise. I see you made a third rough. I think that's where I made my mistake. The .120 gap was the main problem, which I'll pass on to the designer.
    Good job again.

    Rob



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