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    • Dubz

      Hello fellow modellers   02/04/2018

      We would like to present on our Facebook page more regularly pictures of your work. If you would like to participate, and we would appreciate that as we wanna promote the forum this way, please visit https://modelshipworld.com/index.php?/topic/17711-your-images-for-our-facebook-page/

    • kurtvd19

      An Incentive to Start A Build Log - New Plan Set from the NRG   03/17/2018

      An Incentive for Starting a Build Log

      The NRG’s Generic East Coast Oyster Sharpie plan sets have been selling out – we had to reorder prints 2X already.

      BUT nobody has started a build log yet.  As an incentive we have decided to reward the first three (3) MSW / NRG members who purchase the plans and start and continue* actual build logs** from the plans. 

      The build logs should be started in the scratch built forum and labeled with Generic Sharpie – by “your ID”.  When we have six or more build logs up and running we will set up a group build area for the Generic Sharpie build logs.

      The winners will be able to pick any one of the prizes listed below:

      Free registration for one day at 2018 or 2019 NRG Conference                  ($145 value)

      Shop Notes 1 and 2 set                                                                         ($60 value)

      Nautical Research Journal – all content set                                              ($145 value)

      4 CD's or 1 flash drive         

      Continental Galley Washington Plan set                                                    ($65 value)

      1 year NRG membership or extension                                                      ($50 - $62 value)

      THE RULES

       

      *“Continue” means that multiple posts containing build log content must be made for a minimum of 30 days after the initial post.  Logs will be tracked by starting date and the first 3 that have continued for 30 days following their initial post will be declared the winners.

      **Note the words “actual build logs” – no fair showing a few pieces of wood and going no further just to win. 

       

      The NRG has a new set of plans available for purchase with a free 200+ page full-color monograph .  Check the NAUTICAL RESEARCH GUILD NEWS forum below for details.  This plan set is developed for the first time scratch builder with limited tools and experience.  All materials are standard strip stock available from hobby wood suppliers.  However, it is also a great project for the more experienced builder looking for a smaller project to take a break from the bigger builds.  Remember MSW Members who provide us their real name are considered members for the discounted price.  An email or call to the office before you order with your real name and MSW user name before you order is needed for the discount code.

Moxis

Program for cutting scanned bulkheads with cnc router?

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I have always thought, how simple it would be to scan the bulkheads from the drawings, and then let the cnc router to cut them. Easy and accurate method to produce bulkheads.

But in reality not so. Because scanned pictures are often in bitmap format and include a lot of faulty points which must first be cleaned away, and then the pictures must be vectorized, to have finally a drawing which can be cut with a router. So I wonder if there exist any programs that would do this cleaning and bitmap/vectorizing conversion automatically to be able to produce bulkheads or frames easily and accurately?

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vector programs like corel, illustrator and such have the tool to automatically convert bitmap image to vector shape. but as with any automated tool it's prone to errors. the cleaner the bitmap the better the result. for instance if you have nice sharp scan of plans with strong contrast between the lines and background it shouldn't be much of a trouble to convert to good vector shape. but almost always the result is not perfectly clean and manual adjustments are necessary... 

 

cheers

Denis

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I agree on tracing if you're working off of scans.  It's pretty easy to do this in Fusion 360 using "Attach Canvas" then tracing using a spline then use mirror to ensure symmetry.  Then extrude and you have an STL.

 

One thing I found when using attach canvas is it can be tricky to calibrate it accurately.  Through some trial and error I discovered one pixel in an image is represented as 1/2048 of an inch.  This might be useful if you want adjust the scaling factor manually.

Edited by Ben752
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What works best for me is to scan the plans, then use a Bézier pen in Corel Paintshop to plot the outline of a bulkhead or other part on a separate layer.

 

I then save that layer as a .bmp which works with my laser engraver.

 

I believe some free programs like Inkscape will convert .bmp to vector drawings, if you need to convert for your CNC.

Edited by Gregory
Moxis, hexnut and mtaylor like this

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On 10/29/2017 at 4:55 PM, Ben752 said:

I agree on tracing if you're working off of scans.  It's pretty easy to do this in Fusion 360 using "Attach Canvas" then tracing using a spline then use mirror to ensure symmetry.  Then extrude and you have an STL.

 

One thing I found when using attach canvas is it can be tricky to calibrate it accurately.  Through some trial and error I discovered one pixel in an image is represented as 1/2048 of an inch.  This might be useful if you want adjust the scaling factor manually.

Hi Ben,

i am currently learning F 360, crossing over from Bentley microstation. My immediate issues are importing 2D and 3D drawings to F360 from BMS, and creating a hull surface. The results are variable, to say the least. Tutorials are helpful, but if you have any insights I would be pleased to hear them.

Best regards.

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The approach I've taken so far follows something like this:

 

1.  Draft the sheer plan on a sketch following the approaches outlined in Steel.  I've been using model parameters to define the scantlings to support changing values easily.  The description has been very useful for providing traceability.

 

sheer.thumb.png.a002f88e09f8da080e07412d3eddab06.png

5afbdced5ccd5_ScreenShot2018-05-16at8_23_42AM.thumb.png.cf78e087479f8d003240c617927a13e6.png

 

2.  Create a half breadth & body plan sketch.

3.  Start building up additional detail on subsequent sketches on the same plane as the sheer, e.g. deck curves, transom details, etc as it seems fusion works best with more sketches with fewer details.

4.  Build up the profile of the hull using offset planes at station intervals with sketches representing the details of the body plan.

 

tspline.thumb.png.9e34b57e6f7e742f921cc2c554b75664.png

 

While I originally used the patch workspace loft command, the t-spline (from the sculpt workspace) loft allows for more flexibility in fairing.

 

 

 

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