CNC Model building board

[Rod AshtonParticipant @rodashton53132]

Hi – I am looking for advice in respect to CNC cutting some kind of model board with a high rev. 60 deg V cutter, such that I can detail bricks in OO/OH gauge.

Your advise appreciated.

[Rod AshtonParticipant @rodashton53132]

[Tony Pratt 1Participant @tonypratt1]

You need to be more specific.

Tony

[John HaineParticipant @johnhaine32865]

If you mean something like high quality mdf then you could try Valchromat.

[Martin KyteParticipant @martinkyte99762]

Trespar, or extruded rail to build a frame.

regards Martin

[Rod AshtonParticipant @rodashton53132]

Gentlemen – Thank you. Just to clarify. I tried cutting in normal MDF but even at 24000 rpm and a medium feed it was tearing out. Had to sand back very carefully with superfine paper avoiding the very shallow mortar grooves. Would like to find some board with a finer surface.

[Rod AshtonParticipant @rodashton53132]

Have applied for a sample of Valchromat and contacted Trespar. They are not cheap sadly I am!

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for the clarification, Ron

[ you have the tools, but you need a suitable board to work with ]

It’s a big step-up in price, but Traffolyte or similar would seem to be the obvious choice.

**LINK**

https://en.wikipedia.org/wiki/Traffolyte

Millions of Signs, Labels and Dog-Tags have been made from it.

MichaelG.

.

https://traffolyte.com/traffolyte-sheet-material/

 

Edited By Michael Gilligan on 20/01/2020 10:53:35

[Martin KyteParticipant @martinkyte99762]

My apologies for not reading your original post correctly. I though you wanted to build a CNC router and were looking for framing material. You can probably forget trespar for the brick material. It's essentially a modern version of tuffnell and used for Lab benches etc. It's very rigid, can be machined with wood cutting machines and very flat. Ideal for building small machines, router tables etc.

regards Martin

[John HaineParticipant @johnhaine32865]

I've vgot quite a lot of Valchromat bits, black and blue. I could spare some, how much do you need?

You might also try this stuff on MDF to seal the surface before milling.  It gets soaked up like rain in the desert into MDF, apply several coats (outside) and allow to dry thoroughly.  Binds the fibres together in a resin matrix.

Edited By John Haine on 20/01/2020 11:52:33

[JasonBModerator @jasonb]

one of the PU model/tooling boards that are used to make patterns from may be an option and should not be as fluffy as MDF Though you don't say what grade of MDF you used as there are specific ones for routing that have a denser surface layer.

This is a pattern cut from PU board

Edited By JasonB on 20/01/2020 12:59:00

[Rod AshtonParticipant @rodashton53132]

Thank you guys. I am exploring all recommended options. John I would need max 10"x12" or anything smaller. The hardener suggestion is very interesting I am obliged to you.

[Rod AshtonParticipant @rodashton53132]

Seem`s the PU modelling board is minimum 50mm thick. Seeking something around 4/6mm

[John HaineParticipant @johnhaine32865]

Rod, have PM'd you.

[vic francisParticipant @vicfrancis]

Hi if you can locate someone with a laser engraver, it gave super results when I used one for detailing brickwork and mortar, ok it was in 1/8 scale, but I was able to do the same for loco shed gwr )windows using acrylic , it was also super quick as well … err i even reproduced a few cracked panes … bah vandals! The mortar line is also much finer than vee cutter….

regards vic

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