^^^^ and there is the huge advantage of CNC
That is hard to do manually and requires filler in your boo-boos
I haven't heard from Fred in a while, will give him a yell. The agreement was it was a 'do it when you have time" project.
^^^^yup
and I am making my slot boxes at 30mm = same as US and mast tracks, so I don't move the router depth ever
OK.....Fred uses a sacrificial mould insert for his US boxes but he did not say what material. perhaps a machinable wax?
Hoop...the PCV blocks will not go right through on the slot boxes.
Thanks Martin
I used sacrificial clay on my cnc exhaust manifold (dust shoe). Pain in the rear to clean off afterwards. Needs to be something that can be dissolved to make the job easy.
Or blasted out with pressure (not too much!)
Someone asked about the type of files. I have used Shape3D and had blanks cut. I sent the DXF files. Dont know if this is always the case but I have had a few things CNC cut 2D and 3D. They always asked for DXF files.
I also have a question about trimming the airex stage. I am building a SUP, OK its not a windsurfer but a board build is a board build. I want to put airex on the bottom of the board and wrap it up around the rails. I see in the pic he has just put too wide a piece of airex and trimmed it back. Has he put tape or something so it doesnt stick or do you just sand it back.
What density foam is the blank and what pressure is he using when bagging. Is he using epoxy to glue the high density foam to the blank.
OK that was more than a question.
Sorry tarquin but I cannot answer a lot of those questions. I don't build boards just design them. There are some expert board craftsman involved in this thread such as Hoop and Rider who should be able to answer.
As far as files go this board was designed in Alias and I released an Iges file to Fred. Not sure what he is using to drive his NC but it can read Iges nurbs surface. The issue I am having is that there are very few board cutters that have software that can read Nurbs and I am having to use Shape 3D to create the boards. I will most likely to continue to do my initial design in Alias then bring an STL file into Shape 3D and use as a ghost board to trace. I am finding I can get the board very, very close to the original Alias file quite easily. More work for me but I like having the Nurbs surface as i can use it to do renders and animations in softwares like Vred. Also for the boards that James at Carbonart builds he machines a bottom shim to vacuum on to. The person who does that for him can read Iges files. I like to do this in Alias as the surface accuracy is superb and he can then machine a very accurate shim which will ultimately dictate the bottom shape.