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Thread: solidworks stl issue? could use help.

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  1. #1
    Join Date
    Aug 2011
    Location
    NY
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    Default solidworks stl issue? could use help.

    I created a file in solidworks and saved as an stl. I imported it into partworks 3d and created a tool path. When I run the file the first pass seems to cut ok but when it steps down to make the next pass the machine stutters and looses its x and y zero. I end up cutting that path offset unless I am standing there and stop the machine.
    I was thinking I had a mechanical issue but I think it is software. I created a similar file using partworks. just a big hole cut in a block and it ran fine. When I did it in solidworks and tried it I had the same problem. Definately gets confused trying to run the tool path created from an stl import.
    Anybody have any solutions?
    I have version 1.002 of partworks 3d and version 10 fo solidworks.
    regards
    Shaun

  2. #2
    Join Date
    Jan 2004
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    iBILD Solutions - Southern NJ
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    What are your move speeds/cutting speeds set at when cutting the STL?

    Under VR, what is your XYMove Speed? ZMove Speed? Slow Corner Speed?

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

  3. #3
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    Location
    NY
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    Brady,
    I chose 3 inches per sec for feedrate and 2 inches per second for plunge.
    The VR xyMove speed is .4
    The ZMove Speed is .4
    move ramp rate is .15
    slow corner speed is 65
    3d ramp threshold is 100
    regards,
    Shaun

  4. #4
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    move ramp rate is .15 -- Change to .2
    slow corner speed is 65 -- Change to 45
    3d ramp threshold is 100 -- Change to 150
    Min Distance to check -- Change to .08

    What are the overall dimensions of the carving in XY and Z/depth?

    Also - Did you create & run a roughing pass with a square end tool before running a finishing pass with a ball end tool?

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

  5. #5
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    Location
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    Ok, will try cutting it tomorrow.
    The actual job is 10 x 18 x 3. I was planning on cutting it in foam to see if anything hits.
    The practice piece is a 4 x 4 x 1 block with a 3 inch hole 3/4 deep.
    I actually used a 1/8 ball nose for both. Should my roughing be a 1/4 mill?
    shaun

  6. #6
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    You should run a roughing pass on it & reduce your cutting speed. Using the same file, start cutting at 2,1. See how it goes. If you feel that it is OK, increase the speed. That's a lot of material for the finishing tool to hog out in one shot.

    Unless the relief is only like 1/4" deep, you should always do a roughing pass. Try a 1/2" for roughing and see how much material the 1/8" has to take off. If there are big chunks that the 1/2" misses, then use the 1/4.

    The idea behind roughing is to get all the big stuff out of the way so that the finish/3D pass only has to shave off a little bit of material. This reduces or eliminates cutter deflection and tool breakage. If you have never done a roughing pass before, Vectric and DelCAM leave by default .02" of 'meat' on the relief for the finishing pass to shave off.

    Oh...make sure you leave a spot on your material to zero both your roughing tool and finishing tool. You should C2 at the same place.

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

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