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CNC Model building board

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Rod Ashton20/01/2020 08:27:43
293 forum posts
12 photos

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.

Tony Pratt 120/01/2020 08:36:13
987 forum posts
3 photos

You need to be more specific.


John Haine20/01/2020 08:41:54
2835 forum posts
141 photos

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

Martin Kyte20/01/2020 10:00:17
1575 forum posts
24 photos

Trespar, or extruded rail to build a frame.

regards Martin

Rod Ashton20/01/2020 10:33:57
293 forum posts
12 photos

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 Ashton20/01/2020 10:42:59
293 forum posts
12 photos

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

Michael Gilligan20/01/2020 10:47:39
14780 forum posts
635 photos

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.


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




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

Martin Kyte20/01/2020 10:58:29
1575 forum posts
24 photos

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 Haine20/01/2020 11:36:49
2835 forum posts
141 photos

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

JasonB20/01/2020 12:58:31
17073 forum posts
1839 photos
1 articles

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 Ashton20/01/2020 13:11:45
293 forum posts
12 photos

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 Ashton20/01/2020 13:14:06
293 forum posts
12 photos

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

John Haine20/01/2020 14:04:15
2835 forum posts
141 photos

Rod, have PM'd you.

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