CNC Model building board

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CNC Model building board

This topic has 14 replies, 7 voices, and was last updated 10 April 2020 at 15:48 by vic francis.

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20 January 2020 at 08:27 #447702
Rod Ashton
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@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.
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20 January 2020 at 08:27 #16129
Rod Ashton
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@rodashton53132
20 January 2020 at 08:36 #447703
Tony Pratt 1
Participant
@tonypratt1
You need to be more specific.

Tony
20 January 2020 at 08:41 #447705
John Haine
Participant
@johnhaine32865
If you mean something like high quality mdf then you could try Valchromat.
20 January 2020 at 10:00 #447726
Martin Kyte
Participant
@martinkyte99762
Trespar, or extruded rail to build a frame.

regards Martin
20 January 2020 at 10:33 #447731
Rod Ashton
Participant
@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.
20 January 2020 at 10:42 #447737
Rod Ashton
Participant
@rodashton53132
Have applied for a sample of Valchromat and contacted Trespar. They are not cheap sadly I am!
20 January 2020 at 10:47 #447740
Michael Gilligan
Participant
@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
20 January 2020 at 10:58 #447742
Martin Kyte
Participant
@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
20 January 2020 at 11:36 #447753
John Haine
Participant
@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
20 January 2020 at 12:58 #447764
JasonB
Moderator
@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
20 January 2020 at 13:11 #447767
Rod Ashton
Participant
@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.
20 January 2020 at 13:14 #447770
Rod Ashton
Participant
@rodashton53132
Seem`s the PU modelling board is minimum 50mm thick. Seeking something around 4/6mm
20 January 2020 at 14:04 #447780
John Haine
Participant
@johnhaine32865
Rod, have PM'd you.
10 April 2020 at 15:48 #463747
vic francis
Participant
@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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